crusher machine application in slag and fly ash

crusher machine application in slag and fly ash

Time:2014-02-03 Views:35

In the cement paste mixed with fly ash and slag, although the two activity differ greatly, but the chemical compositions are complementary to each other, so there is a superimposed effect and the superimposed effect of strength of fly ash and slag in proper proportion compound of cement paste. Double slag and fly ash cement hydration, has the characteristic of single doped slag or fly ash two, so the early age strength generally between slag or fly ash, with the increase of slag ratio, strength gradually rise.

In the early days, mainly clinker hydration generated Ca (OH) 2 in cement and gypsum respectively as slag powder of alkaline agent and sulfate activator, interactions and active group of slag fine powder, produce hydration products. In the late stage, mainly cement clinker hydration precipitation of Ca (OH) 2, to fly ash spherical vitreous surface through the liquid phase diffusion, prompting the fly ash hydration reaction occurs two times, so that the later strength of double mixed mortar rises greatly, showing stacking effect.

Through the mixture of slag and fly ash than the experimental study, we can conclude the

  • cementitious materials especially admixture compound to improve the concrete comprehensive performance than the single doped or doped with more technical, economic advantage;
  • double doped amount of slag and fly ash replacement concrete later stage strength of cement configuration can reach or exceed the benchmark concrete strength, working performance of its working performance was significantly higher than that of the reference concrete;
  • the current specification of mineral admixture dosage on the conservative side, the results of the tests based on the amount of mineral admixtures can account for more than 40% of the volume of gel.

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