渗透结晶材料对水工混凝土性能影响的试验研究

Experimental Study on Influence of CCCW on the Performance of Hydraulic Concrete

针对不同渗透结晶掺量的水工混凝土开展性能试验研究,分析渗透结晶掺量对水工混凝土抗压强度、抗拉强度、压拉弹性模量、极限拉应变值、渗水高度、冻融质量损失率、相对动弹模等性能参数的影响规律。结果显示:渗透结晶对水工混凝土性能有显著改善作用;渗透结晶掺量在1.2%时,水工混凝土抗压强度、抗拉强度、压拉弹性模量的增幅达到最大;渗透结晶掺量在0.6%时,水工混凝土极限拉应变值的增幅达到最大;渗透结晶掺量在0%~1.2%范围内增大时,混凝土渗水高度、质量损失率有不同程度的降低,相对动弹模有不同程度的提升。研究成果可为渗透结晶型水工混凝土配合比设计及工程应用提供参考。

Experimental study on the performance of hydraulic concrete with different amount of cementitious calillary crystalline waterproof ing material(CCCW)is carried out.The influence of the amount of CCCW on the performance parameters of hydraulic concrete,such as compressive strength,tensile strength,compressive and tensile modulus of elasticity,ultimate tensile strain value,water seepage height,freeze-thaw mass loss rate and relative dynamic modulus were analyzed.The results show that infiltration crystallization can significantly improve the performance of hydraulic concrete.When the content of CCCW is 1.2%,the increase of compressive strength,tensile strength and compressive tensile elastic modulus of hydraulic concrete reaches the maximum.When the content of CCCW is 0.6%,the increase of the ultimate tensile strain of concrete reaches the maximum.When the content of CCCW increases in the range of 0%~1.2%,the water seepage height and mass loss rate of concrete are reduced to varying degrees,and the relative dynamic modulus is improved to varying degrees.The research results can provide reference for the mix proportion design and engineering application of permeable crystalline concrete.