陶粒体积取代率对 C60自密实混凝土性能影响的研究

摘要

The influence of two kinds of ceramsite TL1 and TL2 volume replacement ratio on the working performance,mechanical properties and autogenous shrinkage of the C60 self - compacting concrete were studied.The experimental results show that with the in-creasing of ceramsite volume replacement ratio,the working performance of the C60 self - compacting concrete decreased,the volume replacement ratio within 20%,the influence on working performance was not obvious;With the increasing of ceramsite volume replace-ment ratio,the axial compressive strength of the C60 self - compacting concrete increased after the lower on the on the same curing con-dition. When the ceramsite TL1 and ceramsite TL2 were prewetting 24 hours,and the volume replacement ratio of them were 20% and 30% respectively,the axial compressive strength of he C60 self - compacting concrete was highest,autogenous shrinkage in 400 hours was reduced by 66% and 57% respectively,no autogenous shrinkage in the 100 hours.%研究了两种陶粒 TL1和 TL2的体积取代率对 C60自密实混凝土的工作性能、力学性能、自收缩的影响。结果表明：陶粒的体积取代率增加，C60自密实混凝土的工作性能降低，陶粒的体积取代率在20％以内时，对工作性能影响不明显；随着陶粒的体积取代率增加，同条件养护的 C60自密实混凝土的轴心抗压强度先增大后降低，当陶粒 TL1和陶粒 TL2预湿24 h，体积取代率分别为20％和30％时，C60自密实混凝土的轴心抗压强最高，400 h 自收缩分别降低了66％和57％，100 h 内无自收缩。