Experimental Investigation Of Xypex Etc Waterproof Material Applied In Concrete Dam

The text overpass test to co(?)firm the effect of the three kind of cement based capillary crystalline waterproof material Xypex, Naishen, JL, which can modify the strength. impermeability and freeze proof grade of concrete. In order to prevideing the theory reference and test data of applying the cement based capillary crystalline waterproof marerial to the concrete dam.By way of strength- impermeability and freeze proof test,educing hereinafter conclusion:(one) After brushing the three kind of cement based capillary crystalline waterproof material, 28d compressive strength and cleavage tensile strength of concrete have enhanced.(two) Whether brushing the three kind of cement based capillary crystalline waterproof material on upstream face or downstream fa(?)e, both the aspect can acpuire well waterproof effect, and enhance the concrete impermeability, moreove, brushing waterproof material on upstream face is better than downstream face.(three) Most of the cement sand bed of concrete test piece surface of not brushing waterproof material have desquamated, gravel is vis(?)ble clearly. But in the concrete test piece of brushing waterproof material, although the concrete (?)est piece surface of not coating surface suffer to a certian extent breakage, which is less serious than the test piece of not brushing waterproof material, and the concrete test piece surface of coating surface don't suffer to breakage.(four) In the three kind of (?)ement based capillary crystalline waterproof material, for the enhance of concrete performance, Xypex is the best, Naishen take second place, JL is the weakness.(five) It is observed that after scanning electron microscope and energy spectrum analysis, the three kind of cement based capillary cry: talline waterproof material Xypex, Naishen, JL expedite the hydration of concrete, it has activity chemical s(?)ecies which according water to carrier, transmit, fill in the micropore and capillary bore pipe of concreteca(?)alysis the atom and not hydration component of concrete to hydration again, accordingly forming crystal(?)isate of synusia shape, snowflake shape, rod shape, fibre shape, needle...