配筋条件对补偿收缩混凝土变形性能的影响

配筋条件是影响使用膨胀剂配制的补偿收缩混凝土性能发挥的关键因素之一.试验研究了一维条件下不同配筋率和约束条件时基准混凝土和补偿收缩混凝土限制体积变形发展规律.试验结果表明,随着配筋率的增大,约束条件的增强,基准混凝土和补偿收缩混凝土14d水养限制膨胀率增大,28d干养限制收缩率绝对值减小,前期膨胀与后期收缩问落差值同样减小.

Influences of Bar Arrangement Condition on the Deformation Performance of Shrinkage-compensating Concrete

The bar arrangement compensating concrete by using reference concrete and shrinkage condition is one of the key factors on the performance of shrinkageexpansion agent. The development law of limited volume deformation of -compensating concrete was experimental researched under one dimensional space when bar arrangement condition and constraint condition were different in this paper. The experimental results indicated that the limited expansion rate increased during 14d water cure when the bar arrangement condition and constraint condition were strengthened, and the absolute value of limited shrinkage rate decreased during the following 28d air cure as well as the drop in level number of early expansion and later shrinkage.