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A platform for research: civil engineering, architecture and urbanism
Research on the high-temperature resistance of recycled aggregate concrete with irontailing sand
Highlights Feasibility of iron tailing sand and recycled aggregate to be used in concrete was investigated. Properties relating to concrete at room temperature and high temperature were measured. Effects of temperature, recycled aggregate and iron tailing were analyzed. The optimum replacement rate of recycled aggregate was suggested.
Abstract Recycled aggregate concrete (referred to as RAC) prepared from construction waste is of great importance to the sustainable development of the construction industry. In this study, iron tailing sand is used as fine aggregate, and the treated waste concrete is used as coarse aggregate to prepare RAC with irontailing sand. The compressive strength, flexural strength, and splitting tensile strength are tested. The optimal replacement rate of recycled aggregate is determined by comparing the above mechanical indicators. Comparing the high-temperature resistance of the natural aggregate concrete (referred to as NAC) and the RAC prepared under the optimal replacement rate of recycled aggregate is crucial. Results show that when iron tailing sand is used as fine aggregate, the concretes prepared with different replacement rates of recycled aggregate all show good mechanical properties. The concretes show the best comprehensive mechanical properties when the replacement rate of recycled aggregate is 50%. With the increase in temperature, the residual compressive strength and residual flexural strength show a downward trend as a whole. However, no obvious loss is found in the residual strength of concrete at approximately 200 °C, and a slight increase is observed at approximately 300 °C. Compared with NAC, RAC with iron tailing sand shows better high-temperature resistance after a fire. The recycling of iron tailing sand and recycled aggregate can formulate concrete with good comprehensive properties.
Research on the high-temperature resistance of recycled aggregate concrete with irontailing sand
Highlights Feasibility of iron tailing sand and recycled aggregate to be used in concrete was investigated. Properties relating to concrete at room temperature and high temperature were measured. Effects of temperature, recycled aggregate and iron tailing were analyzed. The optimum replacement rate of recycled aggregate was suggested.
Abstract Recycled aggregate concrete (referred to as RAC) prepared from construction waste is of great importance to the sustainable development of the construction industry. In this study, iron tailing sand is used as fine aggregate, and the treated waste concrete is used as coarse aggregate to prepare RAC with irontailing sand. The compressive strength, flexural strength, and splitting tensile strength are tested. The optimal replacement rate of recycled aggregate is determined by comparing the above mechanical indicators. Comparing the high-temperature resistance of the natural aggregate concrete (referred to as NAC) and the RAC prepared under the optimal replacement rate of recycled aggregate is crucial. Results show that when iron tailing sand is used as fine aggregate, the concretes prepared with different replacement rates of recycled aggregate all show good mechanical properties. The concretes show the best comprehensive mechanical properties when the replacement rate of recycled aggregate is 50%. With the increase in temperature, the residual compressive strength and residual flexural strength show a downward trend as a whole. However, no obvious loss is found in the residual strength of concrete at approximately 200 °C, and a slight increase is observed at approximately 300 °C. Compared with NAC, RAC with iron tailing sand shows better high-temperature resistance after a fire. The recycling of iron tailing sand and recycled aggregate can formulate concrete with good comprehensive properties.
Research on the high-temperature resistance of recycled aggregate concrete with irontailing sand
Zhu, Qian (author) / Yuan, Yi-xin (author) / Chen, Ji-hao (author) / Fan, Lin (author) / Yang, Hang (author)
2022-02-15
Article (Journal)
Electronic Resource
English
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