Basic Directions of Improving the Durability of the Sewage Collector Lining

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Abstract:

The main requirements for the sewage lining are waterproofing properties, mechanical strength, corrosion resistance, resistance to hydro-abrasive wear. Currently, neither in the literature nor in the practice of underground urban construction, there is no information about the quantitative parameters of the above requirements. This leads to uncertainty when creating new means of protection of concrete lining from the effects of external factors and aggressive media flowing through the collector tunnels. Currently, it is possible to control the characteristics of concrete (to increase its density and decrease porosity) through the introduction of additives (superplasticizers to reduce the water-cement ratio, microsilica) or coating of concrete surface materials, contributing to colmatation. It helps to increase the water resistance of concrete tunnel lining, its resistance to aggressive influences. However, this is not enough to prevent deterioration of concrete when exposed to aggressive environment. The article proposed the evaluation of the above requirements, which will solve the problem of increasing the durability of lining concrete sewers.

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25-32

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July 2016

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