摘要
在建筑行业中,利用固体废弃物进行再加工,是实现环保、低碳目标的一种有效方法.为研究石墨尾矿砂浆收缩性能,根据相关规程和标准,对石墨尾矿砂浆进行了配合比设计,并制作了不同石墨尾矿替代率的试件.通过收缩试验,研究了石墨尾矿和配合比优化对石墨尾矿砂浆收缩的影响,并揭示了不同组砂浆试件在无荷载作用下的收缩特性.实验结果表明,掺入石墨尾矿和配合比优化均能减少试件的收缩值.养护达到90 d时,在自然养护条件下,石墨尾矿替代率为30％的试件与普通试件相比,收缩率降低了 5.59％;标准养护下,收缩率降低了4.70％.为实际使用环境下石墨尾矿混凝土结构的体积变形分布特征做前期工作.
Abstract
In the construction industry,the use of solid waste for reprocessing was an effective way to achieve environmental protection and low-carbon goals.In order to study the shrinkage performance of graphite tailings mortar,the mix ratio of graphite tailings mortar was designed according to relevant regulations and standards,and the specimens with different graphite tailings substitution rates were made.The effect of graphite tailings and mix ratio optimization on the shrinkage of graphite tailings mortar was studied through shrinkage test,and the shrinkage characteristics of different groups of mortar specimens under no load were revealed.The experimental results showed that both the addition of graphite tailings and the optimization of the mix ratio can reduce the shrinkage value of the specimen.When the curing reaches 90 days,the shrinkage rate of the specimen with the replacement rate of graphite tailings was 5.59％lower than that of the ordinary specimen under natural curing conditions,and 4.70％lower under standard curing.The preliminary work was provided for the volume deformation distribution characteristics of graphite tailings concrete structures under the actual use environment.
NETL
NSTL
万方数据