摘要
在配制低标号自密实混凝土时,往往掺加大量的粉煤灰.粉煤灰在低标号自密实混凝土中有:替代部分水泥、节省混凝土成本、降低混凝土水化热、体积变化小、增强混凝土抗裂等作用.微细颗粒的石灰石粉具有早期活性,可以作为辅助胶凝材料,部分或全部代替粉煤灰用于混凝土,不仅能够大幅降低混凝土成本,而且可以保证混凝土的其它性能.
Much flyash is often added in the preparation of low-grade and self-compacting concrete, playing three kinds of role： replacing a part of cement and thus saving the concrete costs; reducing the hy- dration heat of concrete thus decreasing the volume change and enhancing the anti-cracking action of con- crete. Superfine particles of limestone has early activity, so it can be used as supplementary cementitious material and can replace a part of or all of flyash used in the concrete. This can not only significantly re- duce the concrete costs, but can ensure the other properties of concrete as well.
出处
《徐州工程学院学报（自然科学版）》
CAS
2012年第4期80-84,共5页
Journal of Xuzhou Institute of Technology(Natural Sciences Edition)
关键词
石粉
低标号
自密实混凝土
stone dust
low-grade
self-compacting concrete
