矿物掺和料与再生骨料对水泥强度和收缩性能的影响

矿物掺和料与再生骨料应用于水泥制品中是废弃物资源化利用的重要途径。为了研究矿物掺和料与再生骨料对水泥强度和收缩性能的影响，设计不同掺和料掺合比例与再生骨料取代率，进行不同龄期的强度、干燥收缩和早期自收缩测试。结果表明，粉煤灰降低水泥强度，而矿粉可提高水泥后期强度；粉煤灰和矿粉对水泥的干燥收缩有抑制作用，但对水泥早期自收缩有促进作用；再生骨料能够提高水泥强度，而对水泥的收缩性能无明显影响。

Influence of Mineral Admixtures and Recycled Aggregate on Strength and Shrinkage of Cement

Making mineral admixtures and recycled aggregate into cement products is an important way for wastes recycling. In order to research the influence of mineral admixtures and recycled aggregate on the strength and shrinkage of cement, different replacement rates of mineral admixtures and recycled aggregate were designed, followed by strength, drying shrinkage and autogenous shrinkage experiments in varied ages. The results show that fly ash reduces the strength, while mineral powder increases the post strength. Fly ash and mineral powder reduce the drying shrinkage, while increase the autogenous shrinkage of cement. Recycled aggregate improves the strength, but has little influence on the shrinkage of cement.