Experimental Study On Temperature And Relative Humidity Response Of Recycled Concrete Microenvironment Under Artificial Climate Environment

Based on the requirement of sustainable development strategy for environmental protection and resource conservation,there are important scientific significance and practical value for the research and utilization of recycled concrete.The micro-environmental response law of recycled concrete in artificial climate environment is the basis of studying the role of climate environment and eroding environment,also play an important part of the research on the concrete durability.The temperature and humidity response law of recycled concrete is analyzed based on the experimental study on the pore structure of recycled concrete and the experimental study on the temperature and humidity response of recycled concrete under artificial climate environment.The pore structure of recycled concrete was studied by mercury intrusion principle.The effect of the recycled coarse aggregate replacement ratio on porosity and pore size distribution of recycled concrete was analyzed.The intelligent temperature-humidity sensor and recorder is used to measure the microenvironment temperature of recycled concrete with different recycled coarse aggregate replacement rate,water-cement ratio and environmental relative humidity under artificial climate environment which stay temperature and humidity constant.The temperature response law of recycled concrete microenvironment is summarized.The effect of recycled coarse aggregate replacement rate,water-cement ratio and environmental relative humidity on the micro-environment temperature response law of recycled concrete was analyzed based on the basic theory of heat transfer and the pore structure parameters of recycled concrete.The intelligent temperature-humidity sensor and recorder is used to measure the microenvironment relative humidity of recycled concrete with different recycled coarse aggregate replacement rate,water-cement ratio and environmental temperature under artificial climate environment which stay temperature and humidity constant.The reverse response law of recycled concrete microenvironment relative humidity was summarized and compared with the forward response law.The reverse humidity diffusion coefficient of recycled concrete was calculated from the experimental data.The effect of recycled coarse aggregate replacement rate,water-cement ratio and environmental temperature on the micro-environment relative humidity response law and reverse humidity diffusion coefficient of recycled concrete was analyzed based on the basic theory of mass transfer and the pore structure parameters of recycled concrete.