The Antibacterial Experiment Study Based On Durability Of Concrete

In this paper, aiming at the deficiency of common concrete durability problems, under the premise of ensuring the strength of concrete, through the influence rule of durability of fly ash, slag and polypropylene fiber on high performance concrete are the main research, and in view of the green ecological environment-friendly sterile building materials requirements, by mixing loading silver zeolite inorganic antibacterial agent study on the antibacterial properties, the impermeability of concrete, and provide some theoretical support for the effect of large amount of fly ash and slag powder on the performance and durability of concrete mechanics, and reach the green sterile concrete concept. The main conclusions of this study are as follows:(1) Through orthogonal test, determine the preferred set of concrete is A2B2C2D1E3, namely the water than for 0.31, with 15% fly ash, slag content is 15%, the rate was 38%, the sand content of polypropylene fiber 1.0kg/m3.(2) Carbonation test:with fly ash and slag incorporation, optimizing the internal pore structure of concrete, reduce the porosity, which makes the carbonation of good performance, but with the later period of fly ash and cement hydration products of Ca (OH) 2 response, consumption of concrete internal Ca (OH) 2 content, make internal porosity increased, CO2 is very easy to enter inside the concrete, the carbonation rate increased, Z group due to the addition of polypropylene fiber, hindered the CO2 into the internal concrete channel.(3) Shrinkage test:the shrinkage of concrete decrease with increasing age, contrast group shrinkage value than the reference group and low shrinkage of concrete mixed with fly ash and slag, the incorporation of the optimal set of polypropylene fiber reinforced concrete after shrinkage value than the reference group of concrete shrinkage value greatly reduced, shrinkage polypropylene fiber to concrete values significant effect.(4) Antibacterial test:the incorporation of silver loaded zeolite concrete absorption value is larger, the test results show that:the silver loaded zeolite incorporation can play a bactericidal effect in concrete.