废弃陶瓷经破碎、筛分加工成人工骨料,部分或全部取代天然砂、石配制成废弃陶瓷骨料混凝土。共设计13组混凝土,其中,基准混凝土1组,废弃陶瓷骨料取代天然粗骨料、取代天然细骨料及同时取代天然粗、细骨料的各4组,取代量分别为30%,50%,70%,100%。进行混凝土收缩试验。试验结果表明,废弃陶瓷骨料混凝土与基准混凝土的收缩变形规律基本一致;废弃陶瓷骨料混凝土的收缩性能优于普通混凝土收缩性能,或者与普通混凝土收缩性能相当;随着废弃陶瓷骨料对天然骨料取代量的增加,混凝土的收缩率呈下降趋势;就收缩性能而言,在混凝土中,废弃陶瓷骨料部分或全部取代天然骨料是可行的。
Waste ceramic blocks are processed into artificial aggregate which are used for preparing concrete, that is, waste ceramic aggregate concrete. There are 13 groups of concrete, such as 1 group of control concrete, 12 groups of waste ceramic aggregate concrete in which natural coarse aggregate, natural fine aggregate, and both natural coarse aggregate and fine aggregate are replaced by waste ceramic aggre- gate respectively. The percentages of replacement are 30 %, 50 %, 70 %, 100 %. Carried out concrete shrink- age tests, and some results are obtained. Firstly, the shrinkage deformation laws of waste ceramic aggre- gate concrete and control concrete are similar. Secondly, the shrinkage performance of waste ceramic ag- gregate concrete is as good as or better than that of ordinary concrete. Thirdly, with the percentage of re- placement of natural aggregate with waste ceramic aggregate gonging up, concrete shrinkage rates show declining trend. Finally, speaking of shrinkage, it is feasible for waste ceramic aggregate to replace natural aggregate in concrete, partially or completely.