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A platform for research: civil engineering, architecture and urbanism
Brick-concrete recycled aggregate/powder synergistic preparation of pervious concrete
Highlights Synergistic preparation of pervious concrete by BC-RA / BC-RP. BC-RPG for pervious concrete was prepared by making full use of the high silica-alumina content of BC-RP. A composite substitution method of 'double grain composite substitution' of BC-RA was proposed to effectively control the strength loss rate of BC-RPC. BC-RPC with harmonious mechanical properties and water permeability was prepared.
Abstract In order to improve the resource utilization rate of brick-concrete construction waste (BC-CW) and meet the demand of 'sponge city' construction for pervious concrete, a kind of brick-concrete recycled pervious concrete (BC-RPC) was prepared by brick-concrete recycled aggregate (BC-RA) / powder (BC-RP). The design was carried out from the two levels of cementitious material pastes and aggregate. Firstly, BC-RP was used as the main silicon-aluminum raw material to prepare a brick-concrete recycled powder based geopolymer (BC-RPG) for pervious concrete. It was determined that the content of BC-RP in BC-RPG was 50%, and the alkali content and modulus of the best alkali activator were 12% and 1.2, respectively. Then, the effect of BC-RA gradation and substitution rate on the mechanical properties of BC-RPC was studied by using BC-RPG as cementitious material and BC-RA as aggregate. The method of 'double grain composite substitution' was proposed to control the strength loss rate of BC-RPC. At the same time, the volume structure parameters (design porosity and pastes-aggregate ratio) of BC-RPC were optimized, and the optimum design porosity and pastes-aggregate ratio for BC-RPC preparation were determined to be 27% and 0.39, respectively. Finally, BC-RPC with coordinated mechanical and water permeability properties was prepared.
Brick-concrete recycled aggregate/powder synergistic preparation of pervious concrete
Highlights Synergistic preparation of pervious concrete by BC-RA / BC-RP. BC-RPG for pervious concrete was prepared by making full use of the high silica-alumina content of BC-RP. A composite substitution method of 'double grain composite substitution' of BC-RA was proposed to effectively control the strength loss rate of BC-RPC. BC-RPC with harmonious mechanical properties and water permeability was prepared.
Abstract In order to improve the resource utilization rate of brick-concrete construction waste (BC-CW) and meet the demand of 'sponge city' construction for pervious concrete, a kind of brick-concrete recycled pervious concrete (BC-RPC) was prepared by brick-concrete recycled aggregate (BC-RA) / powder (BC-RP). The design was carried out from the two levels of cementitious material pastes and aggregate. Firstly, BC-RP was used as the main silicon-aluminum raw material to prepare a brick-concrete recycled powder based geopolymer (BC-RPG) for pervious concrete. It was determined that the content of BC-RP in BC-RPG was 50%, and the alkali content and modulus of the best alkali activator were 12% and 1.2, respectively. Then, the effect of BC-RA gradation and substitution rate on the mechanical properties of BC-RPC was studied by using BC-RPG as cementitious material and BC-RA as aggregate. The method of 'double grain composite substitution' was proposed to control the strength loss rate of BC-RPC. At the same time, the volume structure parameters (design porosity and pastes-aggregate ratio) of BC-RPC were optimized, and the optimum design porosity and pastes-aggregate ratio for BC-RPC preparation were determined to be 27% and 0.39, respectively. Finally, BC-RPC with coordinated mechanical and water permeability properties was prepared.
Brick-concrete recycled aggregate/powder synergistic preparation of pervious concrete
Chen, Xiao (author) / Yang, Yin (author) / Zhang, Haoyu (author) / Du, Xinyu (author) / Chen, Lishun (author) / Zhao, Qinglin (author) / Li, Beixing (author)
2023-09-23
Article (Journal)
Electronic Resource
English
BC-RP , Geopolymer , BC-RA , Composite substitution , Pervious concrete , BC-CW , brick-concrete construction waste , brick-concrete recycled aggregate , brick-concrete recycled powder , BC-RPG , brick-concrete recycled powder based geopolymer , CMP , cementitious material pastes , BC-RPC , brick-concrete recycled pervious concrete
Preparation method of recycled brick-concrete aggregate pervious concrete
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