Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on mechanical properties and microcosmic morphology of polypropylene fiber reinforced recycled concrete after freeze–thaw cycles
Compressive tests, tensile tests, and scanning electron microscopy (SEM) tests were performed on polypropylene fiber recycled concrete (PFRC) after freeze–thaw cycles. The effects of the replacement percentage of recycled coarse aggregate (RCA) and the addition percentage of fiber on strength characteristics were analyzed. The variation rules of strength and failure modes after freeze–thaw cycles were described. The development of stress–strain curves and deformations were observed at different times of freeze–thaw cycles. The experimental results showed that the compressive and tensile strength both present a trend of first increasing and then decreasing with the increase addition percentage of fiber or the replacement percentage of RCA. The optimum mix proportion of RCPP30-0.1 was obtained. The tensile and compressive strength both reduced as the times of freeze–thaw cycles increased. After 75 times, the strength dropped by 6.37% and 4.52% compared with that at 0 time of cycles, respectively. Overall, freeze–thaw cycles have adverse effects on the mechanical properties of PFRC. Based on the theoretical analysis of experimental data, prediction models on macroscopic and microscopic properties were established in this study, which can help promote more extensive applications of RAC and realize persistent development strategy of building, resources, and environment to a certain extent.
Study on mechanical properties and microcosmic morphology of polypropylene fiber reinforced recycled concrete after freeze–thaw cycles
Compressive tests, tensile tests, and scanning electron microscopy (SEM) tests were performed on polypropylene fiber recycled concrete (PFRC) after freeze–thaw cycles. The effects of the replacement percentage of recycled coarse aggregate (RCA) and the addition percentage of fiber on strength characteristics were analyzed. The variation rules of strength and failure modes after freeze–thaw cycles were described. The development of stress–strain curves and deformations were observed at different times of freeze–thaw cycles. The experimental results showed that the compressive and tensile strength both present a trend of first increasing and then decreasing with the increase addition percentage of fiber or the replacement percentage of RCA. The optimum mix proportion of RCPP30-0.1 was obtained. The tensile and compressive strength both reduced as the times of freeze–thaw cycles increased. After 75 times, the strength dropped by 6.37% and 4.52% compared with that at 0 time of cycles, respectively. Overall, freeze–thaw cycles have adverse effects on the mechanical properties of PFRC. Based on the theoretical analysis of experimental data, prediction models on macroscopic and microscopic properties were established in this study, which can help promote more extensive applications of RAC and realize persistent development strategy of building, resources, and environment to a certain extent.
Study on mechanical properties and microcosmic morphology of polypropylene fiber reinforced recycled concrete after freeze–thaw cycles
He, Zhen-Jun (Autor:in) / Zhang, Lu (Autor:in) / Cheng, Chuan (Autor:in) / Chen, Ying (Autor:in) / Jin, Ying-Xi (Autor:in)
European Journal of Environmental and Civil Engineering ; 28 ; 3412-3434
25.10.2024
23 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| DOAJ | 2024
| DOAJ | 2024
| DOAJ | 2024
Seismic performance of reinforced concrete columns after freeze–thaw cycles
| Online Contents | 2016