Qinhuangdao, the Shuozhou grouting material - the impact of fly ash on fresh grout material performance 
 Fly ash on fresh grout in water demand and workability. For example, the constant and the same amount of gel material containing only portland cement grouting material, the fly ash can make grout water consumption decreased from 5% to 15%; water-cement ratio the greater the amount of water the greater the reduction. 
 Grouting material containing fly ash, Qinhuangdao grouting material mixture cohesion and good, but also to reduce the bleeding. This mixture suitable for the preparation of pumping the grouting material or sliding mode grouting material; the surface treatment of fly ash grout is also easier. 
 Fly ash on fresh grout material performance and its particle morphology. Most of the fly ash are spherical solid particles, but there are also some large particles are hollow spherical (ie glass floating bead) or irregular hollow particles. 
 Water-reducing effect of fly ash grout, Qinhuangdao, Shuozhou grouting material is mainly caused by the spherical morphology, also known as the "ball" effect. But there are also other mechanism, or may still be the dominant factor. Especially due to charge effect, the smaller fly ash particles will be attracted to the surface of cement particles, if there is enough fly ash particles coated surface of cement particles, cement particles into a solution of floc state, while maintaining working some conditions can reduce water consumption, if the amount of fly ash is more than the amount required to parcel cement surface, not further reduce water consumption. In fact, only in the dosage range of 20%, with the increase of the amount of fly ash, water consumption will reduce. Superplasticizer, fly ash of this effect does not exist, therefore, water-reducing effect of fly ash (superplasticizer), most likely through the fly ash particle dispersion and adsorption to surface of cement particles. 
 The fly ash carbon content higher have an adverse effect on the workability of grout, Qinhuangdao, Shuozhou grouting material. The carbon content of the change will lead to the cause of retarding, general retarding 1h or so. 
 Mixture mixed with fly ash can also cause retarding the general retarding 1h, probably due to the fly ash particle surface release of SO42-ion-induced. The preparation of grouting material in hot climates, the retarding effect is beneficial; Otherwise, you need to incorporation of the accelerating agent. If only delay the initial setting time, it will not affect the grouting material condensation and the final hardening time interval. 
 Fly Ash Concrete 
 However, you can not over-exaggerate the importance of fly ash; fly ash is no longer a cheap alternative to cement, is not a supplement or an additive mixture. Many of the beneficial effects of fly ash to grouting material, Qinhuangdao, the Shuozhou grouting material, performance. Therefore, in-depth understanding of the fly ash and its impact is very important. 
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