The Experts below are selected from a list of 846 Experts worldwide ranked by ideXlab platform
Bing Chen - One of the best experts on this subject based on the ideXlab platform.
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novel plastering mortar incorporating cenospheres for autoclaved aerated concrete based on Magnesium Phosphate Cement
Journal of Materials in Civil Engineering, 2021Co-Authors: Haijuan Duan, Bing Chen, Lei LangAbstract:AbstractAutoclaved aerated concrete (AAC) is an energy-saving and environmentally friendly building material. However, ordinary portland Cement (OPC) mortar is prone to cracking and spall when it i...
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characterization of Magnesium Phosphate Cement incorporating waste glass powder as mineral admixture
Journal of Materials in Civil Engineering, 2021Co-Authors: Yuantao Liu, Bing Chen, Zhaohui QinAbstract:AbstractThis article utilized waste glass in the form of glass powder (GP) and researched its effects on the properties of Magnesium Phosphate Cement (MPC), which were investigated via working prop...
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experimental research on properties and microstructures of Magnesium iron Phosphate Cement
Construction and Building Materials, 2020Co-Authors: Yuantao Liu, Zhaohui Qin, Bing Chen, Dong Pen, Aminul M HaqueAbstract:Abstract A novel Magnesium-iron Phosphate Cement was prepared based on Magnesium Phosphate Cement (MPC), by incorporating various proportions of Fe2O3 powder as MgO powder replaCement. The research mainly concentrated on the improvement of properties and optimization of microstructure, which were measured in terms of the setting time, fluidity, compressive strength and flexural strength, and analyzed by X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), scanning electron microscopy (SEM) and thermogravimetric (TGA-DTG). Fe2O3 powder decreased that fluidity of the fresh paste and prolonged the setting time to a value of 16 min. The mechanical property was increased with the addition of Fe2O3 powder, and the group containing 20% Fe2O3 powder yielded the highest 28-day compressive strength of 58.7 MPa. Fe2O3 enhanced the crystallization of struvite, participated in the reaction and produced some new hydrates. It also had good pore-filling effect and compacted the microstructure. The analyses on the iron-Phosphate system illustrated that the reaction between Fe2O3 and ADP was promoted by high curing temperature, and confirmed that Fe2O3 could be activated in the MPC system.
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in vitro and in vivo research advanCements on the Magnesium Phosphate Cement biomaterials a review
Materialia, 2020Co-Authors: Aminul M Haque, Bing ChenAbstract:Abstract The key aim of this review study is to expose the in vitro and in vivo research progresses on the Magnesium Phosphate Cement (MPC) bioceramics in the orthopedic and dental zones through congregating the vital outcomes of the studies performed by the global scholars. More importantly, the paper mainly concentrates on the comparison of physico-mechanical properties between the MPC materials and human bone, bone healing and bioresorption mechanisms of MPC graftings, development of in vitro properties such as injectability to bone cracks filling, root canal filling, dentin bond strength and antibacterial performance, and success in the in vivo studies of bone defects recover in rapid time of MPC implantation. Exploration results confirm that MPC transplants are adjustable to foreign body, fully degrade over time maintaining structural stiffness to support the movement of crack zones and play vital role to bone metabolism for healing. These characteristics will stimulate to be a potential alternative to the conventional ceramics like calcium Phosphate Cement (CPC) for special clinical applications. The study also suggests some future directions that are still needed to be investigated for rigorous improvement of MPC substitutes, which are demanding in the orthopedic zones.
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factors assessment of a repair material for brick masonry loaded cracks using Magnesium Phosphate Cement
Construction and Building Materials, 2020Co-Authors: Ban Jin, Longzhu Chen, Bing ChenAbstract:Abstract Cracking of old brick-concrete structures is a serious problem in Shanghai. It is necessary to use quick, high-strength materials to repair load cracks. In this paper, a kind of Magnesium Phosphate Cement (MPC) mortar was developed and selected as the bonding material for brick masonry-loaded cracks. Factors such as the water-binder ratio, sand-binder ratio and borax content that affect the properties of the MPC mortar were studied, and a suitable mixture proportion was chosen for repairing fractured bricks based on the results. Indoor experiments were conducted for assessing the mechanical properties and repair performance for repairing fractured bricks by two kinds of bonding methods. The results show that the MPC mortar has good performance in quick repair projects because of its short setting time and early strength. Using MPC mortar as a bonding material for brick masonry loaded cracks not only achieved the desired bonding effect, but also significantly improved the speed of the repair.
Muhammad Riaz Ahmad - One of the best experts on this subject based on the ideXlab platform.
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influence of type of binder and size of plant aggregate on the hygrothermal properties of bio concrete
Construction and Building Materials, 2020Co-Authors: Muhammad Riaz Ahmad, Bing ChenAbstract:Abstract This study investigated the two innovant and high energy efficient corn stalk concretes based on Magnesium Phosphate Cement (MPC) and ordinary Portland Cement (OPC) as binders and corn stalk (CS) as plant aggregate. Three different sizes of corn stalks were employed to produce the concrete. The effect of type of binder and size of corn stalk on the hygrothermal, mechanical and microstructure properties of corn stalk concrete were studied. The results revealed that MPC-CS concrete exhibited higher sorption and water vapor permeability as compared to OPC-CS concrete and both binders showed excellent thermal performance. The size of corn stalk was more influential in changing the water absorption, capillary saturation, and thermal properties. Whereas, MPC-CS concrete showed better mechanical performance as compared to OPC-CS concrete. Microstructure analysis of concrete showed that MPC binder had superior cohesion properties and compatibility with corn stalk as compared to OPC binder, which also validated the mechanical results.
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improvement of physico mechanical and microstructural properties of Magnesium Phosphate Cement composites comprising with phosphogypsum
Journal of Cleaner Production, 2020Co-Authors: Aminul M Haque, Syed Farasat Ali Shah, Bing Chen, Yuantao Liu, Muhammad Riaz AhmadAbstract:Abstract The current study aimed to utilize the Phosphogypsum (PG) as a mixing ingredient in the Magnesium Phosphate Cement (MPC) matrix and the influence of PG on the physical, mechanical and microstructural properties were explored over the courses of age. For judging the well interactions between the PG and MPC, consecutive dosages such 10%–40%, 60% and 80% PG were introduced as the substitution of very fine aggregate. The analytical results revealed the progress of density and decline of inner void spaces of the solid specimens with the higher amounts of PG. Mechanical strength pointedly enriched for the inclusion of PG up to 40% and obtained the compressive strength and flexural strength more than 75 MPa and 12 MPa, respectively at 28d in air, which were above 90% of control samples. The mass losses were noticed around 2% at 28d curing age. Microstructural properties analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD) demonstrated the well formation of calcium silicate hydrate (CSH), ettringite and some intermediate minerals along with the main struvite crystal, which developed the structural integrity of matrices. The Fourier Transform Infrared spectroscopy (FTIR) analysis also confirmed the existence of new chemical groups in MPC with PG content that indicated the presence of CSH and ettringite. The outcomes of the current research can be a promising solution to reuse PG as an ingredient in the MPC compounds as well as reduce the environmental concern.
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microstructural characterization of basalt fiber reinforced Magnesium Phosphate Cement supplemented by silica fume
Construction and Building Materials, 2020Co-Authors: Muhammad Riaz Ahmad, Bing ChenAbstract:Abstract This research studied the high-temperature resistance and water resistance of Magnesium Phosphate Cement mortar containing different proportions of basalt fiber and silica fume. The improvement mechanism was discussed with several microstructural investigation techniques. It was noticed that increase in the content of silica fume and basalt fiber improved the water and high-temperature resistance of mortar composites. Performance of MPC mortar composite containing 10% silica and 0.5% basalt fiber was superior to other composites showing the water and temperature resistance coefficient of 1.16 and 0.5 respectively. Mass loss results of samples exposed to elevated temperature and those calculated from the thermogravimetric analysis were in similar range of 10 to 12%. Results from mercury intrusion porosimeter indicated that porosity of mortar composites was progressively decreased from 27.4% to 21.05% by increasing the contents of silica fume and basalt fiber. Finally, microstructural analysis of paste samples revealed that additional hydration products were formed beside the main reaction product struvite which supported the enhanced performance of MPC composites due to inclusion of silica fume and basalt fiber.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
Aminul M Haque - One of the best experts on this subject based on the ideXlab platform.
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experimental research on properties and microstructures of Magnesium iron Phosphate Cement
Construction and Building Materials, 2020Co-Authors: Yuantao Liu, Zhaohui Qin, Bing Chen, Dong Pen, Aminul M HaqueAbstract:Abstract A novel Magnesium-iron Phosphate Cement was prepared based on Magnesium Phosphate Cement (MPC), by incorporating various proportions of Fe2O3 powder as MgO powder replaCement. The research mainly concentrated on the improvement of properties and optimization of microstructure, which were measured in terms of the setting time, fluidity, compressive strength and flexural strength, and analyzed by X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), scanning electron microscopy (SEM) and thermogravimetric (TGA-DTG). Fe2O3 powder decreased that fluidity of the fresh paste and prolonged the setting time to a value of 16 min. The mechanical property was increased with the addition of Fe2O3 powder, and the group containing 20% Fe2O3 powder yielded the highest 28-day compressive strength of 58.7 MPa. Fe2O3 enhanced the crystallization of struvite, participated in the reaction and produced some new hydrates. It also had good pore-filling effect and compacted the microstructure. The analyses on the iron-Phosphate system illustrated that the reaction between Fe2O3 and ADP was promoted by high curing temperature, and confirmed that Fe2O3 could be activated in the MPC system.
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in vitro and in vivo research advanCements on the Magnesium Phosphate Cement biomaterials a review
Materialia, 2020Co-Authors: Aminul M Haque, Bing ChenAbstract:Abstract The key aim of this review study is to expose the in vitro and in vivo research progresses on the Magnesium Phosphate Cement (MPC) bioceramics in the orthopedic and dental zones through congregating the vital outcomes of the studies performed by the global scholars. More importantly, the paper mainly concentrates on the comparison of physico-mechanical properties between the MPC materials and human bone, bone healing and bioresorption mechanisms of MPC graftings, development of in vitro properties such as injectability to bone cracks filling, root canal filling, dentin bond strength and antibacterial performance, and success in the in vivo studies of bone defects recover in rapid time of MPC implantation. Exploration results confirm that MPC transplants are adjustable to foreign body, fully degrade over time maintaining structural stiffness to support the movement of crack zones and play vital role to bone metabolism for healing. These characteristics will stimulate to be a potential alternative to the conventional ceramics like calcium Phosphate Cement (CPC) for special clinical applications. The study also suggests some future directions that are still needed to be investigated for rigorous improvement of MPC substitutes, which are demanding in the orthopedic zones.
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improvement of physico mechanical and microstructural properties of Magnesium Phosphate Cement composites comprising with phosphogypsum
Journal of Cleaner Production, 2020Co-Authors: Aminul M Haque, Syed Farasat Ali Shah, Bing Chen, Yuantao Liu, Muhammad Riaz AhmadAbstract:Abstract The current study aimed to utilize the Phosphogypsum (PG) as a mixing ingredient in the Magnesium Phosphate Cement (MPC) matrix and the influence of PG on the physical, mechanical and microstructural properties were explored over the courses of age. For judging the well interactions between the PG and MPC, consecutive dosages such 10%–40%, 60% and 80% PG were introduced as the substitution of very fine aggregate. The analytical results revealed the progress of density and decline of inner void spaces of the solid specimens with the higher amounts of PG. Mechanical strength pointedly enriched for the inclusion of PG up to 40% and obtained the compressive strength and flexural strength more than 75 MPa and 12 MPa, respectively at 28d in air, which were above 90% of control samples. The mass losses were noticed around 2% at 28d curing age. Microstructural properties analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD) demonstrated the well formation of calcium silicate hydrate (CSH), ettringite and some intermediate minerals along with the main struvite crystal, which developed the structural integrity of matrices. The Fourier Transform Infrared spectroscopy (FTIR) analysis also confirmed the existence of new chemical groups in MPC with PG content that indicated the presence of CSH and ettringite. The outcomes of the current research can be a promising solution to reuse PG as an ingredient in the MPC compounds as well as reduce the environmental concern.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
Syed Farasat Ali Shah - One of the best experts on this subject based on the ideXlab platform.
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improvement of physico mechanical and microstructural properties of Magnesium Phosphate Cement composites comprising with phosphogypsum
Journal of Cleaner Production, 2020Co-Authors: Aminul M Haque, Syed Farasat Ali Shah, Bing Chen, Yuantao Liu, Muhammad Riaz AhmadAbstract:Abstract The current study aimed to utilize the Phosphogypsum (PG) as a mixing ingredient in the Magnesium Phosphate Cement (MPC) matrix and the influence of PG on the physical, mechanical and microstructural properties were explored over the courses of age. For judging the well interactions between the PG and MPC, consecutive dosages such 10%–40%, 60% and 80% PG were introduced as the substitution of very fine aggregate. The analytical results revealed the progress of density and decline of inner void spaces of the solid specimens with the higher amounts of PG. Mechanical strength pointedly enriched for the inclusion of PG up to 40% and obtained the compressive strength and flexural strength more than 75 MPa and 12 MPa, respectively at 28d in air, which were above 90% of control samples. The mass losses were noticed around 2% at 28d curing age. Microstructural properties analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD) demonstrated the well formation of calcium silicate hydrate (CSH), ettringite and some intermediate minerals along with the main struvite crystal, which developed the structural integrity of matrices. The Fourier Transform Infrared spectroscopy (FTIR) analysis also confirmed the existence of new chemical groups in MPC with PG content that indicated the presence of CSH and ettringite. The outcomes of the current research can be a promising solution to reuse PG as an ingredient in the MPC compounds as well as reduce the environmental concern.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
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mechanical strength and flexural parameters analysis of micro steel polyvinyl and basalt fibre reinforced Magnesium Phosphate Cement mortars
Construction and Building Materials, 2020Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Magnesium Phosphate Cement composites exhibits higher compressive strength with high brittleness in nature that minimizes the scope of this material for flexural ductility performance. The study targeted to enhance the flexural qualities along with compressive strength of MPC compound through adding the three different fibres such as micro-steel fibre, polyvinyl alcohol fibre and basalt fibre. Inclusion of each fibre was followed a consecutive dosages system such as 0.6%, 0.8%, 1% and 1.2% of the gross mass of binders and aggregate. The compressive strength, three point flexural strength, four point flexural strength and splitting tensile strength tests were considered to explore the flexural characteristics and modulus of elasticity of the prepared fibre reinforced Magnesium Phosphate Cement mortars with the passage of age. The experimental results pointed out the improvement about 20% to 43%, 15% to 25% and 50−72% in the TPFS, FPFS and STS than control specimens at 28d, whereas only around 5% to 10% progresses were noticed in CS for the inclusion of fibres from 0.6% to 1% in FRMPC combinations. In addition, the outcomes of flexural parameters analysis from load-displaCement curves exposed the well development for mixing of 0.8−1% MSF and 0.8% PVAF and BF in the representative MPC compositions that displayed the deflection hardening and deflection softening behavior suitably. Moreover, the L-D curves of TPFS showed the advanced MOE because of less stress distribution intensity in whole cubical samples with low deformations in comparison to other two flexural tests. The study also suggested some power equation based empirical expressions for predicting the strength properties at early ages and correlation equations for flexural tests including MOE in relation to CS results. The analytical findings and recommended correlation equations might be applied in the practical applications of FRMPC related aspects.
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evaluating the physical and strength properties of fibre reinforced Magnesium Phosphate Cement mortar considering mass loss
Construction and Building Materials, 2019Co-Authors: Aminul M Haque, Muhammad Riaz Ahmad, Bing Chen, Syed Farasat Ali ShahAbstract:Abstract Fibre reinforced Magnesium Phosphate Cement (FRMPC) composites are drawing attention day by day in the practical applications due to their excellent strength performance. Keeping this issue in mind, this study aimed to add a little contribution on this area by examining the physical and strength properties of FRMPC mortars containing micro-steel fibre (MSF), polyvinyl alcohol fibre (PVA) and basalt fibre (BF). Each fibre content with consecutive four dosages such as 0.6%, 0.8%, 1% and 1.2% of the total quantity of binders and aggregate, were added in the designated combinations. The analyzed results exhibited that porosity, pore degree of saturation, reduction of permeable voids, density and water absorption properties were well improved for adding 0.6% and 0.8% MSF and PVA, and 0.6% BF fibres in the matrices, whereas the rest two selected higher fibre contents made the microstructure of MPC specimens sponginess by forming the substantial quantity of internal pores. Mass loss was recorded about 0.6%−1% for air cured FRMPC samples at 28 d by adopting abrasion test, where the static immersion liquid condition revealed around 1.5% − 3.0%. In addition, air cured samples containing 0.8% MSF showed the highest compressive strength around 54.8 MPa and 82.6 MPa at 1hr and 28 d, respectively than other considered combinations. Moreover, FRMPC syntheses exposed around 10% − 15% strength loss in water environment as compared to air. SEM observations presented the well interfacial closeness of MSF by coating the hydration products that probably enhanced the noteworthy strength quality of MSF-MPC mortars. XRD investigations also corroborated the possible explanation for reducing the strength loss in water regime by presenting the low peaks of struvite minerals, which was happened due to the dissolution of mass that accorded with the experimental results. These findings might show a path for potential use of FRMPC specimens to enhance the durability properties.
Yingru Fan - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of basalt fiber reinforced Magnesium Phosphate Cement composites
Construction and Building Materials, 2018Co-Authors: Jihui Qin, Jueshi Qian, Chao You, Xiaobing Dai, Yanfei Yue, Yingru FanAbstract:Abstract Magnesium Phosphate Cements (MPCs) have found a wide range of applications due to their superior properties. However, as a chemically bonded ceramic material, MPCs show highly brittle behavior. Fiber inclusion is a simple and effective way to improve their ductility and toughness. In this study, short discrete basalt fibers with different fiber contents by mixture volume (i.e. 0–1.5%) and lengths (i.e. 6 mm–30 mm) were added into MPC matrix. Properties of basalt fiber reinforced MPC composites (BFRMPCs) including workability, compressive, splitting tensile, flexural and post-peak residual strengths, and toughness were assessed. The fracture surfaces of BFRMPC samples were also investigated by using scanning electron microscopy (SEM). The results revealed that the addition of basalt fibers into MPC mixture led to a significant decrease in workability and a slight decrease in bulk density. The beneficial effect of basalt fibers on compressive strength began to weaken after 1% of fiber volume, while splitting tensile strength, flexural strength, and fracture toughness significantly increased with the increase of fiber volume. Moreover, the load-deflection behavior was highly related to the fiber content and testing age. In addition, the effect of basalt fiber lengths on the properties of MPC mixtures was insignificant. The results also suggested that basalt fiber reinforced MPCs showed better mechanical properties than glass fiber reinforced MPCs.
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Bond behavior and interfacial micro-characteristics of Magnesium Phosphate Cement onto old concrete substrate
Construction and Building Materials, 2018Co-Authors: Qin Jihui, Jueshi Qian, Chao You, Yingru Fan, Hongtao WangAbstract:Abstract In several applications of Magnesium Phosphate Cement (MPC), one encounters a need for bonding old Portland Cement (OPC) concrete with MPC. The bonding characteristics between MPC and OPC concrete substrate, were evaluated using flexural and tensile bond strength, failure modes, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The experimental results show that samples having a lower magnesia to Phosphate molar ratio (M/P) and water to Cement mass ratio (w/c) exhibit higher bond strength and stronger affinity for OPC concrete, as well as better developed interfacial microstructure. Multiple interfacial interactions between MPC and OPC concrete are evidenced by microstructural analysis and XRD: MPC paste can infiltrate into the irregularities of the OPC substrate; etching of the surface of hardened OPC paste occurs under the pH condition of MPC paste; penetration of soluble Phosphate creates the potential for the chemical reaction and filling effect at the interface.
