Auxiliary cementitious materials in the role of superfine grouting material

Superfine grouting superfine grouting material price superfine grouting material factory at present, all kinds of aiding gelation materials production in our country is very big, 2 billion tons of fly ash, more than 400 ten thousand tons of slag and a lot of silica fume. These admixtures with shape effect and micro aggregate effect and hydration activity, function of early and late of superfine grouting material has good improvement effect. Fly ash and other superfine grouting material of the original data, on the behavior, according to, in effect, can complement each other. In the new mixing superfine grouting material of fly ash particles, both the common 'bearing' and 'flocculant solution' behavior, and can play together with cement and sand superfine grouting material micro aggregate effect of grain size distribution. Often in superfine grouting material hardening, fly ash as gelling materials 'second part'. Can with calcium hydroxide precipitation in the process of cement hydration 'secondary reaction', generated which has the function of gelation hydration of calcium aluminate, hydrated calcium silicate. Overlap with the cement hydration products, improved the interface of superfine grouting material, reduces the transition zone, hydration products can fill cement stone wool stoma, constitute a close superfine grouting material microstructure, improve the function of superfine grouting material durability. Building materials test indicate; Compared with no mixing of superfine fly ash grouting material, mixing the permeability of the superfine fly ash grouting material to be markedly reduced. 30 day age superfine grouting material penetrate down 49. 3%, the place fell by 70 to 77. 7%. Ground granulated slag except with micro aggregate effect and the ash activity, also contains a lot of amorphous structure. Silica fume particles finer, filled with the superfine cement grouting materials effectively between particles, plays a micro aggregate effect, make superfine grouting material grading more continuous, superfine grouting material more dense; At the same time because of silica fume with strong volcanic activity, further in the late of superfine grouting material hydration secondary hydration, decreased the content of calcium hydroxide, decrease the crystal size, refine pore structure, total porosity and macroporous content, reducing the interfacial transition zone. In addition, the adsorption on the surface of the aggregate, silica fume particles can supply the focusing point of cement hydration, and avoid the interface orientation growth of the calcium hydroxide, falling tendency degree of calcium hydroxide. In general, aiding gelation materials on the degree of improvement superfine grouting material mainly depends on several aspects; 1, aiding gelation materials particle shape and size; 2, the chemical composition of aiding gelation materials; 3, mixed aiding gelation materials in the dosage of the superfine grouting material;