The Micro Aggregate Effect Of Slag

In general, concrete can be regarded as a continuously graded particle stacking system, where the gaps between coarse aggregates are filled with fine aggregates, the gaps between fine aggregates are filled with cement particles, and the gaps between cement particles require finer particles to fill. According to the Aim and Goff model theory, when considering cement-based materials mixed with ultrafine mineral admixtures as a multi-component system, there exists a closest packing in the system, which depends on the ratio of the particle size of the ultrafine mineral admixture to the cement particle size. The smaller the value, the greater the closest packing value. The slag powder is finer than the cement particles, and after replacing some of the cement, these small particles fill the gaps between the cement particles, Better grading of cementitious materials, forming a dense filling structure and a self compacting stacking system at the micro level; At the same time, it can also reduce the water consumption under standard consistency, and improve the fluidity of the mixture while maintaining the same water consumption conditions; In addition, the filling effect can also increase the cohesion of the mixture and prevent bleeding and segregation.