Heavy density silica fume for guesthouses cement

heavy density silica fume for guesthouses cement:This Microsilica is generally added to the cement used in construction.The promotion effect of encrypted black silica fume on the early strength development of different hardened cementitious material systems is not obvious; with the growth of age, the strength development of cementitious materials doped with Silica Fume is faster, and the doping of silica fume obviously improves the 28 d compressive strength of the cementitious materials, and the promotion effect of encrypted silica fume on the late development of the strength of the cementitious materials is gradually weakened. Early high-temperature maintenance on the activity of silica fume has obvious stimulating effect, promote the reaction activity of silica fume in the cementitious material system, this stimulating effect is mainly concentrated in the first 72 hours after the beginning of hydration, but on the later development of the strength of cementitious materials has a negative impact. In the net pulp of cementitious materials, there are clusters of silica fume with a diameter of 10~50μm, the dispersion of the original silica fume is better than the encrypted silica fume, these clusters of silica fume do not occur within the hydration reaction, and may become a weak area within the net pulp slurry, so that the enhancement of silica fume is not obvious.