Deicing salt to the destruction of the grouting material, characteristic and protective measures High-strength non-shrink grout material wholesale

grouting grouting material curing winter with grouting changchun epoxy resin grouting material; In winter, highway and city road to avoid because of ice and snow make the car skid form the traffic accident, often to spread salt on the road by freezing to remove snow and ice. At home and abroad in recent years, the traffic is more and more attention to career and academics to de-icing salt on severe damage to the formation of grouting material pavement and bridge deck, proved salt frozen erosion damage is more severe form of freeze-thaw damage, found in engineering application, de-icing salt not only accelerated the frost damage, and enter the grouting guess chlorine salt and lead to serious reinforcement corrosion. One, the damage mechanism of 1, osmotic pressure increases in grouting space much grouting material density much saturated water absorption degree of progress, frozen pressure increased. 2, 3 salt crystallization pressure, salt concentration gradient makes the seas by layered ice stress at 4, in addition to the hydrostatic pressure, there is also the osmotic pressure of the salt solution 5, salt production of frozen contributed to the cold. Second, the damage characteristics of 1, damage from appearance, gradually to the internal, falls off surface mortar, aggregate leakage. 2, fall off inside the layer grouting material adhere to strong sound. 3, this damage is very fast, is a winter, less than the number of winter, it can produce serious erosion damage. 4, boring white powder crystal can be seen in the corrosion and crack appearance. & N kaifeng grouting material manufacturer BSP; Three, primary prevention measures 1, grouting material must be bleed air, air content should be around 5%. 2, to use Portland cement or Portland cement. 3, pay attention to when mixing fly ash, slag drop water/cement ratio, but a doped silicon ash. 4, add appropriate protective layer thickness. Four, advance grouting material antifreezing solution 1, fell by grouting material water-binder ratio, the rate of decline in space, adding air-entraining seam an agent, adhere to the air content in 4% ~ 5% 3, strength of grouting material progress, in the case of the same air content, the higher the strength of grouting material, frost resistance, the better. 4, try to use the relatively small size of coarse aggregate, avoid using the bibulous rate is large, 4 ~ 5 um hole more aggregate.