Preliminary study on wear resistance and durability of recycled micro powder concrete
In order to explore the influence of water cement ratio,sand ratio,micro powder/mineral powder ratio,and water reducing agent dosage on the durability and wear resistance of recycled micro powder concrete from construction waste,a four factor three-level orthogonal experimental design is adopted.The levels of the above factors are taken as 0.47,0.5 and 0.53,0.5,0.53 and 0.56,0.4,0.5 and 0.6,and 2%,4%and 6%respectively.The main indicators for testing the wear resistance and durability of recycled micro powder concrete are tested.The results showed that:①the wear resistance,impermeability,carbonation,chloride ion migration,and shrinkage indicators of self leveling concrete prepared with ground floor recycled micro powder in each mix ra-tio meets the requirements;②The various testing indicators increase with the increase of water cement ratio,and first increase and then decrease with the increase of sand ratio.Water cement ratio and sand ratio are the main factors affecting the performance of recycled micro powder concrete from construction waste;③The ratio of micro powder to mineral powder and the amount of water reducing agent have a relatively small impact on wear resistance,impermeability,carbonation,and shrinkage,but a slightly greater impact on chloride ion mi-gration.They are secondary factors affecting the performance of recycled micro powder concrete from construc-tion waste.The above conclusions can provide reference for similar research and engineering applications.
recycled micro powder from concreteconstruction wastewear resistancedurability
NETL
NSTL
万方数据
