The New Additives Of Research On The Effects Of Permeability In Concrete And Mixed Mortar

In recent years, with the continuous development of architectural engineering material technology, the building's exterior wall materials has experienced phase, such as the cement plaster, ceramic Mosaic. Now the materials has developed into the glass curtain wall, exterior wall coating, three-dimensional greening and other building materials. However, the resulting situation is becoming more and more serious water leakage through exterior walls. Building the stand or fall of permeability in exterior quality, not only directly affect the building's external beauty, but also affect the use effect of the internal users. Especially in the southern larger rainfall area, due to the heavy rain, exterior wall leakage not only caused the indoor water, also can destroy the outer walls of the building structure, resulting in the structure of the quality hidden trouble.Combining with the actual situation of construction projects, we mainly from the macro and micro two aspects analyzes the causes of building exterior wall leakage problems, and put forward a series of control measures and from the Angle of material design, fundamentally solve the problem of exterior wall leakage.Based on the water penetration method researching the permeability resistance of concrete, concrete specimen seal is the key to success of the test. For the permeability test of concrete in the problem of poor sealing effect, we explore the infiltration experiments of sealing material sealing mode method. Based on the traditional sealing material of paraffin wax and butter as a experimental comparison,we analyzed the different proportion of curing agent of epoxy resin cement demoulding and sealing effect. We found that using epoxy resin sealing material test method is convenient and feasible, the results are stable,and effective guarantee the test result without edge sealing material caused by floods, affect the permeability resistance of concrete, greatly improving the test success rate.We use label permeability and water penetration height method two kinds of test method, studied the several conditions, such as a change in different concrete strength grade, the quantity of additives, outside with mixed mortar, mixed mortar mixing different amount of additives in the permeability resistance of concrete, and analyzes the concrete and mixed mortar microscopic structure changes. Test results show that directly in the concrete mixed with additives to improve the permeability resistance of concrete is small, and the strength grade of concrete will also directly affect the additives on the properties of concrete permeability improvement; And on the basis of the composite mortar mixed with additives is thin layer on the permeability resistance of concrete is increased obviously. Certain conditions, the more additive content in mixed mortar, mortar layer is thick, the permeability resistance of concrete, the better. Using mixed with additives of plaster mortar permeability in exterior walls, it has very important significance for engineering application.