Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Environmental-friendly non-sintered permeable bricks: Preparation from wrap-shell lightweight aggregates of dredged sediments and its performance
Highlights Permeable bricks of wrap-shell aggregates from dredged sediments were prepared. The process parameters of DSPB were studied. The effective porosity directly determines the water permeability of DSPB. The micro-cracks in cement stone determine the performance of DSPB after freeze–thaw.
Abstract In this study, a new technology for preparation of permeable bricks from non-sintered wrap-shell lightweight aggregates (WSLAs) of dredged sediments was developed. The volume method was used to calculate the material mix ratio. The effects of water-cement ratio (W/C), forming pressure (Pf), target porosity (P) and size of aggregate particles on the compressive strength and water permeability coefficient of dredged sediment permeable bricks (DSPB) were discussed. Furthermore, the mechanism of water permeability of DSPB was deeply explored. The mass loss rate and strength loss rate of DSPB after 25 freeze–thaw cycles were compared with that of the crushed stone permeable bricks (CSAPB), the commercial sintered clay permeable bricks (SCLPB), and the commercial sintered ceramic permeable bricks (SCEPB) prepared by the same process. The damage mechanism of DSPB caused by the freeze–thaw cycles was analyzed. Results showed that when W/C was 0.34, Pf was 3 MPa, and P was 15%, the comprehensive performance of fine aggregate permeable brick (DSPB-F) was satisfactory. It was found that the water permeability coefficient of DSPB is almost proportional to the connected porosity. After 25 freeze–thaw cycles, interestingly, 0it was found that the freezing resistance of DSPB is closely related to the number, width and development trend of micro-pores and cracks at the junctions of WSLAs.
Environmental-friendly non-sintered permeable bricks: Preparation from wrap-shell lightweight aggregates of dredged sediments and its performance
Highlights Permeable bricks of wrap-shell aggregates from dredged sediments were prepared. The process parameters of DSPB were studied. The effective porosity directly determines the water permeability of DSPB. The micro-cracks in cement stone determine the performance of DSPB after freeze–thaw.
Abstract In this study, a new technology for preparation of permeable bricks from non-sintered wrap-shell lightweight aggregates (WSLAs) of dredged sediments was developed. The volume method was used to calculate the material mix ratio. The effects of water-cement ratio (W/C), forming pressure (Pf), target porosity (P) and size of aggregate particles on the compressive strength and water permeability coefficient of dredged sediment permeable bricks (DSPB) were discussed. Furthermore, the mechanism of water permeability of DSPB was deeply explored. The mass loss rate and strength loss rate of DSPB after 25 freeze–thaw cycles were compared with that of the crushed stone permeable bricks (CSAPB), the commercial sintered clay permeable bricks (SCLPB), and the commercial sintered ceramic permeable bricks (SCEPB) prepared by the same process. The damage mechanism of DSPB caused by the freeze–thaw cycles was analyzed. Results showed that when W/C was 0.34, Pf was 3 MPa, and P was 15%, the comprehensive performance of fine aggregate permeable brick (DSPB-F) was satisfactory. It was found that the water permeability coefficient of DSPB is almost proportional to the connected porosity. After 25 freeze–thaw cycles, interestingly, 0it was found that the freezing resistance of DSPB is closely related to the number, width and development trend of micro-pores and cracks at the junctions of WSLAs.
Environmental-friendly non-sintered permeable bricks: Preparation from wrap-shell lightweight aggregates of dredged sediments and its performance
Yang, Mao (Autor:in) / Ju, Chenggong (Autor:in) / Xue, Kairu (Autor:in) / Peng, Yuzhou (Autor:in) / Han, Hong (Autor:in) / Wan, Qianqian (Autor:in) / Peng, Xiao (Autor:in) / Wu, Yan (Autor:in)
15.11.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017