剪力墙烂根处理（Shear wall root treatment）.doc

剪力墙烂根处理（Shear wall root treatment） There are many reasons for the root causes of shear wall concrete, and its main reasons are as follows: 1. The concrete water ash ratio is too large, causing the root: 1.1, causes: the concrete water-cement ratio is too large (generally not pumping from the mixed concrete is greater than 0.6, pumping concrete is greater than 0.45), plasma stone are prone to segregation, due to the buoyancy of concrete grout is reduced, the concrete under the effect of the vibration of the vibrator, the pulp stone cannot be arranged to uniform, but the stone to the bottom of the precipitation, slurry floatation, formed the roots rotted. The roots are often permeable, that water can penetrate from one side of the wall to the other. Preventive measures: 1.2 adjust the concrete water-cement ratio, average field since the mix of pumping concrete water-cement ratio control between 0.55 ~ 0.60, increased serum consistency within the concrete, guarantee in the process of vibration within the concrete slurry is suitable for stone buoyancy, so as to achieve mold concrete grout is put and stones to uniform layout, concrete mortar can fill all the space form, to eliminate the roots rotted due to concrete water-cement ratio is too large. 1.3 treatment measures: if the permeability is long and the area is larger, the pressure filling should be used. 2. The surface concrete of the shear wall is uneven and the slurry causes the root: 2.1 causes: due to the casting concrete floor, it cant effectively control the shear walls of flatness, lateral wall and floor caused by varying widths of gaps between the two, or aperture blockage is lax, the concrete pouring to be done in vibrating, part of the slurry through the aperture loss, cause there is crack in the wall body side roots rotted. The size and depth of the roots depend on the size of the concrete and the length of the vibrating time. This type of root usually occurs on the side of the gap, which is usually not m