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Suksun Horpibulsuk - One of the best experts on this subject based on the ideXlab platform.
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Cement stabilisation of recycled Concrete Aggregate modified with polyvinyl alcohol
International Journal of Pavement Engineering, 2020Co-Authors: Teerasak Yaowarat, Suksun Horpibulsuk, Arul Arulrajah, Farshid Maghool, Mehdi Mirzababaei, Ahmad Safuan A. Rashid, Avirut ChinkulkijniwatAbstract:During the past few decades, the engineering and geotechnical properties of recycled Concrete Aggregate (RCA) has been investigated to evaluate its potential to use as a road construction material....
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recycled Concrete Aggregate municipal glass blends as a low carbon resource material for footpaths
Road Materials and Pavement Design, 2018Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Monzur Alam Imteaz, Yanjun Du, Jack Shuilong ShenAbstract:Construction and Demolition (C&D) materials comprising recycled Concrete Aggregate (RCA), fine recycled glass (FRG) and a blend comprising 85% RCA with 15% FRG (85RCA/15FRG) were evaluated for thei...
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modulus of rupture evaluation of cement stabilized recycled glass recycled Concrete Aggregate blends
Construction and Building Materials, 2015Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Mahdi M Disfani, Hamed Haghighi, Alireza MohammadiniaAbstract:Abstract Construction and Demolition (C&D) wastes are increasingly used as construction material in a range of civil engineering applications. Fine Recycled Glass (FRG) is collected at municipal kerbsides and its usage to date has been limited to unbound pavement layers. This research was undertaken to evaluate the performance of FRG as a supplementary material in blends with cement stabilized recycled Concrete Aggregate (RCA). Laboratory evaluation was undertaken on the RCA/FRG blends with 10%, 20% and 30% FRG content and stabilized with 3% medium setting General Blend (GB) cement. The laboratory evaluation was comprised of pH, plasticity index, foreign materials content, particle size distribution, linear shrinkage, California Bearing Ratio, modified Proctor compaction, Repeated Load Triaxial test, Unconfined Compressive Strength test and flexural beam tests. The cement stabilized RCA/FRG blends with up to 30% FRG content were found to have physical properties, which comply with the local state road authority requirements. The results of Repeated Load Triaxial tests indicated the RCA/FRG blends performed well with 30% FRG content just on the border line for bound pavement material. Unconfined Compression Strengths met the minimum requirement for 7 days of curing for all blends, while the 28 day strength of the blends showed a significant improvement with curing. The results of the flexural beam tests were noted to be consistent with past works with cement stabilized virgin quarry rock products. The modulus of rupture and flexural modulus for all the cement-stabilized RCA/FRG blends indicate that these blends are suitable for applications such as cement-stabilized pavement bases/subbases. The fatigue life was also within the range previously reported for quarry materials. The cement-stabilized blends with FRG as a supplementary material with up to 30% FRG content and 3% GB cement were found to have physical and strength properties, which would comply with road authority requirements.
Chi Sun Poon - One of the best experts on this subject based on the ideXlab platform.
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sustainable design of pervious Concrete using waste glass and recycled Concrete Aggregate
Journal of Cleaner Production, 2019Co-Authors: Jianxin Lu, Pingping He, Chi Sun PoonAbstract:Abstract This study designed an eco-friendly pervious Concrete (PC) product using waste glass cullet (WGC) and recycled Concrete Aggregate (RCA) by dry-mixed compaction technique. The mechanical properties, water permeability behavior and related pore structure characteristics, thermal conductivity of the PCs were determined. The experimental results showed that the use of silica fume in the cement paste was effective to compensate for the low compressive strength of the PCs due to the use of narrowed graded Aggregates without the incorporation of fine particles (less than 2.36 mm). Although the incorporation of recycled Aggregates (i.e. WGC and RCA) into the PCs led to reductions in compressive strength, the water permeability of the PCs was improved, especially for the PCs prepared with WGC, as the use of WGC was conducive to improving the water permeability due to the negligible water absorption nature and smooth surface of glass cullet. Another encouraging result indicated that the PCs comprising 50% WGC as the fine Aggregate and 50% RCA as the coarse Aggregates could achieve satisfactory strength and permeability, which could largely meet the requirement of the standard (JIS A 5371) for permeable pedestrian pavers. The appropriate blending of the selected size of WGC (2.36–5 mm) and RCA (5–10 mm) to produce a desirable pore structure in the PCs were responsible for the good performance. In addition, the low thermal conductivity of the produced PCs provided an opportunity to use the PC as partition block materials for saving energy consumption of buildings.
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influence of carbonated recycled Concrete Aggregate on properties of cement mortar
Construction and Building Materials, 2015Co-Authors: Jiake Zhang, Chi Sun Poon, Caijun Shi, Yake Li, Zhaobin Xie, Xiaoying PanAbstract:This work investigated the effect of carbon dioxide treatment of recycled Concrete Aggregate (RCA) on the performance of RCA and RCA mortar. The results indicated that carbonation increased the apparent density, and reduced both water absorption and the crushing value of the RCA. The flowability and compressive strength of the RCA mortar were lower than those of natural sand mortar. However, the properties of mortar made with carbon dioxide treated RCA were very similar to those of natural sand mortar. Compared with the mortar made of un-carbonated RCA, the mortar made with carbonated RCA showed increased autogenous shrinkage, reduced drying shrinkage, water absorption, and chloride migration coefficient. Scanning electron microscope (SEM) examination on the interfacial transition zone (ITZ) in the RCA and RCA mortar found that carbonation treatment of RCA not only improved the original ITZ in the RCA, but also improved the newly formed ITZ in the RCA mortar.
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paving blocks made with recycled Concrete Aggregate and crushed clay brick
Construction and Building Materials, 2006Co-Authors: Chi Sun Poon, Dixon ChanAbstract:Abstract Clay brick generated from construction sites is usually delivered to landfills for disposal. With the limited landfill space in Hong Kong, there is an immediate need to explore the possible use of crushed clay brick as a new civil engineering material. In Hong Kong, government specifications promote the use of paving blocks made with 70–100% recycled Concrete Aggregate in order to facilitate the recycling of construction and demolition (C&D) waste. This paper presents a recent study at the Hong Kong Polytechnic University on the investigation of blending recycled Concrete Aggregate and crushed clay brick as Aggregates in the production of paving blocks. The results indicated that the incorporation of crushed clay brick reduced the density, compressive strength and tensile strength of the paving blocks. Due to the high water absorption of crushed clay brick particles, the water absorption of the resulting paving blocks were higher than that of the paving blocks that did not incorporate crushed clay brick. Although it was found that crushed clay brick impaired the quality of the resulting paving blocks to a certain extent, the paving blocks using 50% crushed clay brick met the minimum requirements specified by AS/NZS 4455 and ETWB of Hong Kong (Grade B) for pedestrian areas. Furthermore, it was feasible to produce paving blocks prepared with 25% crushed clay brick that satisfied the compressive strength requirement for paving blocks (Grade B) prescribed by ETWB of Hong Kong for trafficked area.
Arul Arulrajah - One of the best experts on this subject based on the ideXlab platform.
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Cement stabilisation of recycled Concrete Aggregate modified with polyvinyl alcohol
International Journal of Pavement Engineering, 2020Co-Authors: Teerasak Yaowarat, Suksun Horpibulsuk, Arul Arulrajah, Farshid Maghool, Mehdi Mirzababaei, Ahmad Safuan A. Rashid, Avirut ChinkulkijniwatAbstract:During the past few decades, the engineering and geotechnical properties of recycled Concrete Aggregate (RCA) has been investigated to evaluate its potential to use as a road construction material....
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recycled Concrete Aggregate municipal glass blends as a low carbon resource material for footpaths
Road Materials and Pavement Design, 2018Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Monzur Alam Imteaz, Yanjun Du, Jack Shuilong ShenAbstract:Construction and Demolition (C&D) materials comprising recycled Concrete Aggregate (RCA), fine recycled glass (FRG) and a blend comprising 85% RCA with 15% FRG (85RCA/15FRG) were evaluated for thei...
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modulus of rupture evaluation of cement stabilized recycled glass recycled Concrete Aggregate blends
Construction and Building Materials, 2015Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Mahdi M Disfani, Hamed Haghighi, Alireza MohammadiniaAbstract:Abstract Construction and Demolition (C&D) wastes are increasingly used as construction material in a range of civil engineering applications. Fine Recycled Glass (FRG) is collected at municipal kerbsides and its usage to date has been limited to unbound pavement layers. This research was undertaken to evaluate the performance of FRG as a supplementary material in blends with cement stabilized recycled Concrete Aggregate (RCA). Laboratory evaluation was undertaken on the RCA/FRG blends with 10%, 20% and 30% FRG content and stabilized with 3% medium setting General Blend (GB) cement. The laboratory evaluation was comprised of pH, plasticity index, foreign materials content, particle size distribution, linear shrinkage, California Bearing Ratio, modified Proctor compaction, Repeated Load Triaxial test, Unconfined Compressive Strength test and flexural beam tests. The cement stabilized RCA/FRG blends with up to 30% FRG content were found to have physical properties, which comply with the local state road authority requirements. The results of Repeated Load Triaxial tests indicated the RCA/FRG blends performed well with 30% FRG content just on the border line for bound pavement material. Unconfined Compression Strengths met the minimum requirement for 7 days of curing for all blends, while the 28 day strength of the blends showed a significant improvement with curing. The results of the flexural beam tests were noted to be consistent with past works with cement stabilized virgin quarry rock products. The modulus of rupture and flexural modulus for all the cement-stabilized RCA/FRG blends indicate that these blends are suitable for applications such as cement-stabilized pavement bases/subbases. The fatigue life was also within the range previously reported for quarry materials. The cement-stabilized blends with FRG as a supplementary material with up to 30% FRG content and 3% GB cement were found to have physical and strength properties, which would comply with road authority requirements.
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reclaimed asphalt pavement and recycled Concrete Aggregate blends in pavement subbases laboratory and field evaluation
Journal of Materials in Civil Engineering, 2014Co-Authors: Arul Arulrajah, J Piratheepan, M M DisfaniAbstract:In recent years, efforts have been made to incorporate reclaimed asphalt pavement (RAP) into pavement base or subbase applications by means of cement binder stabilization. This approach, however, may not be an environmentally friendly solution due to the high carbon footprint involved in the production of Portland cement. Recycled Concrete Aggregate (RCA), on the other hand, has been widely accepted in pavement applications. The sustainable solution of blending RAP with RCA was investigated in this research in an attempt to facilitate the usage of this blend as an alternative pavement subbase material. An extensive suite of geotechnical laboratory tests was undertaken on RAP with contents of 100, 50, 30 and 15% in blends with RCA. Results of the research study indicated that RAP/RCA blends with a low 15% RAP content meet the repeated load triaxial requirements for use in pavement subbase layers. Results of field performance of a pavement subbase constructed with untreated 100% RAP, at a private haul road field-demonstration site, confirmed that it had insufficient strength requirements to meet local road-authority pavement-subbase requirements. RAP and RAP/RCA blends, although found in this study to be not fully compliant with the local road-authorities requirements, could be potentially considered for lower traffic usage, such as haul roads and footpaths.
Susan L. Tighe - One of the best experts on this subject based on the ideXlab platform.
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Incorporating Recycled Concrete Aggregate in Pervious Concrete Pavements
2020Co-Authors: Rabiah Rizvi, Susan L. Tighe, Joseph Norris, HendersonAbstract:The effectiveness of pervious Concrete for use in the Canadian climate is currently being evaluated. Virgin Aggregate sources within Canada are limited and other sources need to be evaluated for use, such as Recycled Concrete Aggregate (RCA). Recycling Concrete from curbs and gutters, sidewalks and parking lots reduces the amount of Concrete being put into landfills. Using RCA in new Concrete has multiple advantages to the environment namely, reducing dumping at landfill sites, reducing gravel mining and reducing hauling of virgin Aggregate and therefore reducing emissions. The purpose of this research was to incorporate RCA into pervious Concrete to create a very sustainable Concrete product for paving. The research methodology involved substituting the coarse Aggregate in the pervious Concrete mix design with 15 percent, 30 percent, 50 percent and 100 percent RCA. Cylinders were cast in the laboratory for each percentage of RCA and also a control pervious Concrete mix design containing only virgin Aggregate. Each of the Concrete batches that were mixed was tested for slump, temperature, entrained air, and unit weight. The testing was done to determine whether the batches were consistent and within the recommended limits specified. The testing showed that pervious Concrete with an optimum RCA content has strengths, voids and permeability comparable to that of pervious Concrete containing only virgin Aggregate.
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Effect of Recycled Concrete Aggregate on Rutting and Stiffness Characteristics of Asphalt Mixtures
Journal of Materials in Civil Engineering, 2019Co-Authors: Hanaa Khaleel Alwan Al-bayati, Susan L. TigheAbstract:AbstractThis study aims to evaluate the influence of the addition of coarse recycled Concrete Aggregate (CRCA) on the rutting and stiffness of Ontario Superpave mixtures. Mix designs of asphalt mix...
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the effect of recycled Concrete Aggregate properties on the bond strength between rca Concrete and steel reinforcement
Cement and Concrete Research, 2011Co-Authors: Liam J Butler, Jeffrey S. West, Susan L. TigheAbstract:Abstract The purpose of this study was to investigate the influence that replacing natural coarse Aggregate with recycled Concrete Aggregate (RCA) has on Concrete bond strength with reinforcing steel. Two sources of RCA were used along with one natural Aggregate source. Numerous Aggregate properties were measured for all Aggregate sources. Two types of Concrete mixture proportions were developed replacing 100% of the natural Aggregate with RCA. The first type maintained the same water–cement ratios while the second type was designed to achieve the same compressive strengths. Beam-end specimens were tested to determine the relative bond strength of RCA and natural Aggregate Concrete. On average, natural Aggregate Concrete specimens had bond strengths that were 9 to 19% higher than the equivalent RCA specimens. Bond strength and the Aggregate crushing value seemed to correlate well for all Concrete types.
Zhaobin Xie - One of the best experts on this subject based on the ideXlab platform.
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performance enhancement of recycled Concrete Aggregate a review
Journal of Cleaner Production, 2016Co-Authors: Caijun Shi, Yake Li, Jiake Zhang, Wengui Li, Linlin Chong, Zhaobin XieAbstract:Abstract Recycled Concrete Aggregate differ from natural Aggregate as the former contains hardened cement mortar. The adhered cement mortar on recycled Concrete Aggregate has higher porosity and water absorption and lower strength than natural Aggregate do. It has negative effects on the mechanical properties and durability of fresh and hardened Concrete made with recycled Concrete Aggregate. Therefore, it will facilitate the applications of recycled Concrete Aggregate if the adhered cement mortar can be enhanced. Removing and strengthening the adhered mortar are the two main methods for enhancing the properties of recycled Concrete Aggregate. This paper reviews the published enhancement methods for recycled Concrete Aggregate, and points out their advantages and disadvantages so as to facilitate the selection and further development of suitable enhancement methods for recycled Concrete Aggregate. It suggests that carbonation treatment is an efficient and feasible method for improving the mechanical properties and durability of recycled Concrete Aggregate. Carbonation treatment of recycled Concrete Aggregate is not only an efficient way for enhancing the properties of recycled Concrete Aggregate, but also an environmental friendly approach.
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influence of carbonated recycled Concrete Aggregate on properties of cement mortar
Construction and Building Materials, 2015Co-Authors: Jiake Zhang, Chi Sun Poon, Caijun Shi, Yake Li, Zhaobin Xie, Xiaoying PanAbstract:This work investigated the effect of carbon dioxide treatment of recycled Concrete Aggregate (RCA) on the performance of RCA and RCA mortar. The results indicated that carbonation increased the apparent density, and reduced both water absorption and the crushing value of the RCA. The flowability and compressive strength of the RCA mortar were lower than those of natural sand mortar. However, the properties of mortar made with carbon dioxide treated RCA were very similar to those of natural sand mortar. Compared with the mortar made of un-carbonated RCA, the mortar made with carbonated RCA showed increased autogenous shrinkage, reduced drying shrinkage, water absorption, and chloride migration coefficient. Scanning electron microscope (SEM) examination on the interfacial transition zone (ITZ) in the RCA and RCA mortar found that carbonation treatment of RCA not only improved the original ITZ in the RCA, but also improved the newly formed ITZ in the RCA mortar.