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通过不同细度矿渣-钢渣、矿渣-粉煤灰、粉煤灰-钢渣的复合,制备出不同粒度分布的复合辅助性胶凝材料,研究了复合辅助性胶凝材料的掺入对混凝土工作性能和力学性能的影响。试验结果表明:矿渣细度对混凝土早期强度影响较大,矿渣越细,混凝土早期强度越高;含有粉煤灰的复合体系中,粉煤灰具有较好的形态减水效应;同时还发现简单的将最细矿渣、最细钢渣、最细粉煤灰进行混合并不能十分有效地发挥辅助性胶凝材料的各种效应,而采用“级配优化”的方法能配制出性能优异的复合辅助性胶凝材料。
The composite auxiliary cementitious materials with different particle size distribution were prepared by compounding slag with different fineness, slag, fly ash, fly ash and steel slag. The effects of compound auxiliary cementitious materials on the performance of concrete And mechanical properties. The results show that: the fineness of slag has a great effect on the early strength of concrete, the finer the slag, the higher the strength of concrete in early stage; the fly ash has better water reducing effect in the composite system containing fly ash; Of the finest slag, the finest steel slag, the smallest fly ash mixed and can not be very effective to play a variety of auxiliary cementitious effects, and the use of “gradation optimization ” method can be formulated with excellent performance Composite auxiliary cementitious materials.