The Experts below are selected from a list of 9816 Experts worldwide ranked by ideXlab platform
Mohd Zamin Jumaat - One of the best experts on this subject based on the ideXlab platform.
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manufacturing of high strength Lightweight Aggregate concrete using blended coarse Lightweight Aggregates
Journal of building engineering, 2017Co-Authors: Muhammad Aslam, Payam Shafigh, Mohammad Alizadeh Nomeli, Mohd Zamin JumaatAbstract:Abstract Structural Lightweight concrete plays an important role in the construction industry, especially for the high-rise buildings. It can only be produced using Lightweight Aggregates. Oil-palm-boiler clinker (OPBC) is a solid waste from the oil palm industry and could be used as Lightweight Aggregate in concrete mixture. However, the density of this Lightweight Aggregate is more than the density of the other types of natural and artificial Lightweight Aggregate. Therefore, the density of concrete was made of this Lightweight Aggregate is relatively high and is in the range of semi-Lightweight concrete. In the current study, OPBC was partially substituted with a lighter Lightweight Aggregate namely oil palm shell (OPS) in a OPBC semi-Lightweight concrete with high strength to further reduce the density of the concrete. To this end, OPBC was replaced by OPS with 0%, 20%, 40% and 60% by volume. Test results show that contribution of OPS in OPBC concrete reduces the density, while all the mechanical properties were also reduced. This occurs due to smooth surface texture of OPC and its lower density compared to OPBC. It was, however, found that OPBC semi-Lightweight concrete containing more than 20% OPS turns to be structural Lightweight concrete with high strength. Based on the mechanical properties and water absorption test results it is recommended that the optimum substitution of OPBC with OPS stays between 20 to 40%.
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high strength Lightweight Aggregate concrete using blended coarse Lightweight Aggregate origin from palm oil industry
Sains Malaysia, 2017Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:The benefits of using structural Lightweight concrete in construction industry, particularly in high rise buildings, over normal weight concrete are numerous. The main method of producing structural Lightweight concrete is the use of Lightweight Aggregates instead of ordinary Aggregates in concrete. Due to the limited resources for natural and artificial Lightweight Aggregates, the alternative sources for Lightweight Aggregates should be discovered from industrial wastes. Oil palm shell (OPS) and oil-palm-boiler clinker (OPBC) are two solid wastes from palm oil industry and are available in abundance in tropical regimes. The use of just OPS as coarse Lightweight Aggregate in concrete mixture has some drawbacks for concrete. The aim of this study was to investigate engineering properties of a Lightweight concrete containing both of these Aggregates. For this purpose, in this study, 50% (by volume) of OPS was replaced with OPBC in an OPS Lightweight concrete. The test results showed that when OPS was substituted with OPBC, significant improvement was observed in the compressive, splitting tensile and flexural strengths. In addition, initial and final water absorption as well as drying shrinkage strain of blended coarse Lightweight Aggregate concrete were significantly less than OPS concrete.
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oil palm by products as Lightweight Aggregate in concrete mixture a review
Journal of Cleaner Production, 2016Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:Abstract The use of industrial waste as a construction material to build environmentally sustainable structures has several practical and economic advantages. Oil-palm-boiler clinker is a waste material obtained by burning off solid wastes during the process of palm oil extraction. The research performed over the last two decades concerning the use of oil-palm-boiler clinker as a Lightweight Aggregate to produce structural Lightweight Aggregate concrete is summarized in this paper. The physical, chemical and mechanical properties of oil-palm-boiler clinker Aggregate and the mechanical properties and structural performance of oil-palm-boiler clinker concrete are addressed, discussed, and compared with normal weight concrete. The review of the literature showed that depending on the source of oil-palm-boiler clinker the specific gravity of this Aggregate is 15–35% less than normal weight Aggregates and it can be used as a Lightweight Aggregate for making structural Lightweight Aggregate concrete. Concretes containing oil-palm-boiler clinker as coarse and fine Aggregates have the 28-day compressive strength in the range of 17–47 MPa, with a density in the range of 1440–1850 kg/m 3 . While, concretes containing oil-palm-boiler clinker as coarse Aggregate and normal sand as fine Aggregate have the 28-day compressive strength in the range of 15–35 MPa with a density in the range of 1800–2000 kg/m 3 . Partial replacement of oil palm shell with oil-palm-boiler clinker in oil palm shell Lightweight concrete could significantly improve (about 40%) the compressive strength of the concrete. The research gaps are also identified in this study to explore the innovative Lightweight concrete based on the financial and environmental design factors.
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Structural Lightweight Aggregate Concrete by Incorporating Solid Wastes as Coarse Lightweight Aggregate
Applied Mechanics and Materials, 2015Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:Structural Lightweight Aggregate concrete offers several benefits as compared to the normal weight concrete. Most common methods of producing structural Lightweight concrete is by using artificial Lightweight Aggregates. However, the cost of the production of artificial Lightweight Aggregates is high due to energy and raw materials consumption. The use of waste and by-product materials as Lightweight Aggregate in concrete can provide a better solution to reducing the negative impact of the concrete industry. This paper reports an investigation to produce structural Lightweight Aggregate concrete by utilizing the locally available solid waste materials, namely oil palm shell (OPS) and oil-palm-boiler clinkers (OPBC) as coarse Lightweight Aggregates. Two different mix proportions were studied. In the first concrete mix, just OPS was used as coarse Aggregate. However, 40% of OPS (by volume) of the first mix was replaced with OPBC in the second mix. The test results showed that by replacing OPS with OPBC, it directly affects the characteristics of the Lightweight concrete. The 28-days compressive strength of the blended coarse Lightweight Aggregate concrete was significantly increased compared to OPS concrete.
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mix design and mechanical properties of oil palm shell Lightweight Aggregate concrete a review
International Journal of Physical Sciences, 2010Co-Authors: Payam Shafigh, Mohd Zamin Jumaat, Hilmi Bin MahmudAbstract:To build environmentally sustainable structures, especially in developing countries, the possibility of using some agricultural wastes and industrial by-products from different industries as construction materials will be highly desirable and has several practical and economic advantages. Oil palm shell (OPS) is a form of agricultural solid waste in the tropical regimes. Research over the last two decades shows that OPS can be used as a Lightweight Aggregate for producing structural Lightweight Aggregate concrete. The density of OPS concrete is around 20 - 25 lower than normal weight concrete. Generally, mechanical properties of OPS concrete are slightly lower than the other types of Lightweight Aggregate concrete. It seems that from the summary and analysis of the existing information concerning OPS concrete and comparing it with other Lightweight Aggregate concrete it appears that significant achievements can be attained.
C R Cheeseman - One of the best experts on this subject based on the ideXlab platform.
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properties and microstructure of Lightweight Aggregate produced from lignite coal fly ash and recycled glass
Resources Conservation and Recycling, 2010Co-Authors: Ioanna Kourti, C R CheesemanAbstract:Abstract The effect of glass addition on the processing, physical properties and microstructure of Lightweight Aggregate made from lignite coal fly ash from the Megalopolis power station in Greece has been investigated. Fly ash/glass mixes have been rapidly sintered at temperatures between 1040 and 1120 °C in a rotary furnace, and the density, water absorption and pellet strength determined. Sintering 60:40 fly ash:waste glass mixes at 1120 °C produced Lightweight Aggregate with a mean density of 1.35 g/cm 3 , water absorption of ∼16% and crushing strength of 7.3 MPa. Major crystalline phases in sintered materials were quartz (SiO 2 ), albite (NaAlSi 3 O 8 ), moissanite (SiC), hematite (Fe 2 O 3 ), wollastonite (CaSiO 3 ) and diopside (CaMg(Si 2 O 6 )). The work indicates that Megalopolis fly ash combined with waste glass can be used to manufacture Lightweight Aggregate with properties comparable to commercially available products. Fly ash and glass are potential resources that are currently waste materials in Greece. The processing involving pelletising and sintering in a rotary kiln is similar to that required for other commercially available Lightweight Aggregates manufactured from shales, clays and slate, and therefore processing costs are expected to be similar. However, avoiding the costs and environmental impacts associated with importing Lightweight Aggregate or using pumice makes the production of FA/glass Lightweight Aggregate a viable option.
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properties and microstructure of Lightweight Aggregate produced from sintered sewage sludge ash
Resources Conservation and Recycling, 2005Co-Authors: C R Cheeseman, G S VirdiAbstract:Abstract The properties of Lightweight Aggregate (LWA) manufactured from the ash produced by fluidised bed incineration of sewage sludge have been investigated. The ash was mixed with a clay binder, formed into approximately spherical pellets and rapidly sintered in a rotary tube furnace at temperatures between 1020 and 1080 °C. Selected physical properties of sintered ash pellets relevant to use as Lightweight Aggregate have been determined, including density (apparent specific gravity), water absorption and compressive (crushing) strength. These have been compared to the properties of a commercially available Lightweight Aggregate (Lytag). Sewage sludge ash (SSA) pellets sintered over a range of temperatures were found to have lower densities than Lytag and low water absorption when fired between approximately 1050 and 1080 °C. Individual pellet strengths were comparable to Lytag. Major crystalline phases present in both as-received and sintered sewage sludge ash were quartz (SiO 2 ), the calcium magnesium phosphate mineral whitlockite (Ca 7 Mg 2 P 6 O 24 ) and hematite (Fe 2 O 3 ). Manufacturing Lightweight Aggregate from sewage sludge ash may become increasingly viable as landfill disposal costs continue to increase and the costs of alternative natural Aggregates obtained from increasingly distant locations also increase. Sewage sludge incinerators tend to be situated in urban areas, close to where construction activity is occurring. The results indicate the potential for manufacturing high quality Lightweight Aggregate from the sterile, inert ash produced by sewage sludge incineration, using relatively simple processing and low temperature sintering.
Yue-lin Huang - One of the best experts on this subject based on the ideXlab platform.
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Fire-resistance property of reinforced Lightweight Aggregate concrete wall
Construction and Building Materials, 2012Co-Authors: C.g. Go, Jun-ren Tang, Cheng-tung Chen, Yue-lin HuangAbstract:Abstract This research focuses on reinforced Lightweight Aggregate concrete walls. After performing a standard temperature rising fire-resistance test, the fire resistance performance and mechanic behavior of the wall sample are studied under a lateral horizontal load. Reinforced Lightweight Aggregate concrete walls and reinforced normalweight concrete walls are given the fire-resistance test under the same conditions, then their fire resistance performance and mechanical behaviors are compared. Taking into consideration the steel spacing, Aggregate type, wall size, and high temperature as the wall sample variables. The research results showed that the reinforced Lightweight Aggregate concrete wall is superior to the reinforced normalweight concrete wall on ultimate load, yield load, cracked load, stiffness, ductility, and inter-story drift after a high-temperature fire-resistance test. In terms of failure patterns, for a reinforced Lightweight Aggregate concrete wall after a high-temperature fire-resistance test, the smaller the steel spacing the higher the yield load and ultimate load, but the worse the ductility. This result matched the results of the reinforced Lightweight Aggregate concrete wall without the high-temperature fire-resistance test and revealed that the reinforced Lightweight Aggregate concrete wall retained its mechanics after the fire-resistance test.
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determination of the dividing strength and its relation to the concrete strength in Lightweight Aggregate concrete
Cement & Concrete Composites, 1999Co-Authors: Howji Chen, Yue-lin HuangAbstract:Abstract As concrete is considered to be a composite material consisting of mortar and coarse Aggregate, its strength depends on the mortar strength and coarse Aggregate strength. During the strength development stage of a Lightweight Aggregate concrete, a critical condition, under which the type of stress distribution changes, occurs as the values of the modulus of elasticity of the Lightweight Aggregate and mortar become the same. The concrete strength corresponding to this instant is named ‘Dividing Strength (FG)’ by Weigler & Karl (Stahlleichtbeton, 1972, pp. 38–43) [1]. A series of specimens consisting of 252 concrete cylinders (100φ × 200 mm) and 252 mortar cubes (50 × 50 × 50 mm) were made and subjected to compression tests. From the obtained mortar-concrete strength relationship, we were able to identify a dividing strength for a Lightweight Aggregate concrete made with a 0.4 water cement ratio. The test data also show that both particle density and particle sizes of Lightweight Aggregate are governing factors for the dividing strength. The concept of a dividing strength can be utilized to optimize a mix design for Lightweight Aggregate concrete. For instance, concrete that has a designed compressive strength much greater than its dividing strength may consume too much cement and resulting to wasteful cement consumption.
G S Virdi - One of the best experts on this subject based on the ideXlab platform.
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properties and microstructure of Lightweight Aggregate produced from sintered sewage sludge ash
Resources Conservation and Recycling, 2005Co-Authors: C R Cheeseman, G S VirdiAbstract:Abstract The properties of Lightweight Aggregate (LWA) manufactured from the ash produced by fluidised bed incineration of sewage sludge have been investigated. The ash was mixed with a clay binder, formed into approximately spherical pellets and rapidly sintered in a rotary tube furnace at temperatures between 1020 and 1080 °C. Selected physical properties of sintered ash pellets relevant to use as Lightweight Aggregate have been determined, including density (apparent specific gravity), water absorption and compressive (crushing) strength. These have been compared to the properties of a commercially available Lightweight Aggregate (Lytag). Sewage sludge ash (SSA) pellets sintered over a range of temperatures were found to have lower densities than Lytag and low water absorption when fired between approximately 1050 and 1080 °C. Individual pellet strengths were comparable to Lytag. Major crystalline phases present in both as-received and sintered sewage sludge ash were quartz (SiO 2 ), the calcium magnesium phosphate mineral whitlockite (Ca 7 Mg 2 P 6 O 24 ) and hematite (Fe 2 O 3 ). Manufacturing Lightweight Aggregate from sewage sludge ash may become increasingly viable as landfill disposal costs continue to increase and the costs of alternative natural Aggregates obtained from increasingly distant locations also increase. Sewage sludge incinerators tend to be situated in urban areas, close to where construction activity is occurring. The results indicate the potential for manufacturing high quality Lightweight Aggregate from the sterile, inert ash produced by sewage sludge incineration, using relatively simple processing and low temperature sintering.
Payam Shafigh - One of the best experts on this subject based on the ideXlab platform.
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manufacturing of high strength Lightweight Aggregate concrete using blended coarse Lightweight Aggregates
Journal of building engineering, 2017Co-Authors: Muhammad Aslam, Payam Shafigh, Mohammad Alizadeh Nomeli, Mohd Zamin JumaatAbstract:Abstract Structural Lightweight concrete plays an important role in the construction industry, especially for the high-rise buildings. It can only be produced using Lightweight Aggregates. Oil-palm-boiler clinker (OPBC) is a solid waste from the oil palm industry and could be used as Lightweight Aggregate in concrete mixture. However, the density of this Lightweight Aggregate is more than the density of the other types of natural and artificial Lightweight Aggregate. Therefore, the density of concrete was made of this Lightweight Aggregate is relatively high and is in the range of semi-Lightweight concrete. In the current study, OPBC was partially substituted with a lighter Lightweight Aggregate namely oil palm shell (OPS) in a OPBC semi-Lightweight concrete with high strength to further reduce the density of the concrete. To this end, OPBC was replaced by OPS with 0%, 20%, 40% and 60% by volume. Test results show that contribution of OPS in OPBC concrete reduces the density, while all the mechanical properties were also reduced. This occurs due to smooth surface texture of OPC and its lower density compared to OPBC. It was, however, found that OPBC semi-Lightweight concrete containing more than 20% OPS turns to be structural Lightweight concrete with high strength. Based on the mechanical properties and water absorption test results it is recommended that the optimum substitution of OPBC with OPS stays between 20 to 40%.
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high strength Lightweight Aggregate concrete using blended coarse Lightweight Aggregate origin from palm oil industry
Sains Malaysia, 2017Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:The benefits of using structural Lightweight concrete in construction industry, particularly in high rise buildings, over normal weight concrete are numerous. The main method of producing structural Lightweight concrete is the use of Lightweight Aggregates instead of ordinary Aggregates in concrete. Due to the limited resources for natural and artificial Lightweight Aggregates, the alternative sources for Lightweight Aggregates should be discovered from industrial wastes. Oil palm shell (OPS) and oil-palm-boiler clinker (OPBC) are two solid wastes from palm oil industry and are available in abundance in tropical regimes. The use of just OPS as coarse Lightweight Aggregate in concrete mixture has some drawbacks for concrete. The aim of this study was to investigate engineering properties of a Lightweight concrete containing both of these Aggregates. For this purpose, in this study, 50% (by volume) of OPS was replaced with OPBC in an OPS Lightweight concrete. The test results showed that when OPS was substituted with OPBC, significant improvement was observed in the compressive, splitting tensile and flexural strengths. In addition, initial and final water absorption as well as drying shrinkage strain of blended coarse Lightweight Aggregate concrete were significantly less than OPS concrete.
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oil palm by products as Lightweight Aggregate in concrete mixture a review
Journal of Cleaner Production, 2016Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:Abstract The use of industrial waste as a construction material to build environmentally sustainable structures has several practical and economic advantages. Oil-palm-boiler clinker is a waste material obtained by burning off solid wastes during the process of palm oil extraction. The research performed over the last two decades concerning the use of oil-palm-boiler clinker as a Lightweight Aggregate to produce structural Lightweight Aggregate concrete is summarized in this paper. The physical, chemical and mechanical properties of oil-palm-boiler clinker Aggregate and the mechanical properties and structural performance of oil-palm-boiler clinker concrete are addressed, discussed, and compared with normal weight concrete. The review of the literature showed that depending on the source of oil-palm-boiler clinker the specific gravity of this Aggregate is 15–35% less than normal weight Aggregates and it can be used as a Lightweight Aggregate for making structural Lightweight Aggregate concrete. Concretes containing oil-palm-boiler clinker as coarse and fine Aggregates have the 28-day compressive strength in the range of 17–47 MPa, with a density in the range of 1440–1850 kg/m 3 . While, concretes containing oil-palm-boiler clinker as coarse Aggregate and normal sand as fine Aggregate have the 28-day compressive strength in the range of 15–35 MPa with a density in the range of 1800–2000 kg/m 3 . Partial replacement of oil palm shell with oil-palm-boiler clinker in oil palm shell Lightweight concrete could significantly improve (about 40%) the compressive strength of the concrete. The research gaps are also identified in this study to explore the innovative Lightweight concrete based on the financial and environmental design factors.
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Structural Lightweight Aggregate Concrete by Incorporating Solid Wastes as Coarse Lightweight Aggregate
Applied Mechanics and Materials, 2015Co-Authors: Muhammad Aslam, Payam Shafigh, Mohd Zamin JumaatAbstract:Structural Lightweight Aggregate concrete offers several benefits as compared to the normal weight concrete. Most common methods of producing structural Lightweight concrete is by using artificial Lightweight Aggregates. However, the cost of the production of artificial Lightweight Aggregates is high due to energy and raw materials consumption. The use of waste and by-product materials as Lightweight Aggregate in concrete can provide a better solution to reducing the negative impact of the concrete industry. This paper reports an investigation to produce structural Lightweight Aggregate concrete by utilizing the locally available solid waste materials, namely oil palm shell (OPS) and oil-palm-boiler clinkers (OPBC) as coarse Lightweight Aggregates. Two different mix proportions were studied. In the first concrete mix, just OPS was used as coarse Aggregate. However, 40% of OPS (by volume) of the first mix was replaced with OPBC in the second mix. The test results showed that by replacing OPS with OPBC, it directly affects the characteristics of the Lightweight concrete. The 28-days compressive strength of the blended coarse Lightweight Aggregate concrete was significantly increased compared to OPS concrete.
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mix design and mechanical properties of oil palm shell Lightweight Aggregate concrete a review
International Journal of Physical Sciences, 2010Co-Authors: Payam Shafigh, Mohd Zamin Jumaat, Hilmi Bin MahmudAbstract:To build environmentally sustainable structures, especially in developing countries, the possibility of using some agricultural wastes and industrial by-products from different industries as construction materials will be highly desirable and has several practical and economic advantages. Oil palm shell (OPS) is a form of agricultural solid waste in the tropical regimes. Research over the last two decades shows that OPS can be used as a Lightweight Aggregate for producing structural Lightweight Aggregate concrete. The density of OPS concrete is around 20 - 25 lower than normal weight concrete. Generally, mechanical properties of OPS concrete are slightly lower than the other types of Lightweight Aggregate concrete. It seems that from the summary and analysis of the existing information concerning OPS concrete and comparing it with other Lightweight Aggregate concrete it appears that significant achievements can be attained.
