Influence of Additives-Wastes of Chemical Industry Enterprises on the Properties of Reinforced Concrete in Transport Structures
Journal Title: Metallurgical and Mining Industry - Year 2018, Vol 10, Issue 1
Abstract
Abstract As a result of corrosion processes, crystals are formed inside the concrete, the growth of which leads to the occurrence of cracks and destruction of reinforced concrete transport structures. For the longterm protection of the reinforcement, low concrete permeability (dense structure) has been required. The denser the concrete, the better it resists penetration to the reinforcement of aggressive substances. In addition to the micropores, macropores can also participate in the corrosion of RCC, when defects in the form of cracks occur in the protective layer creating the effect of differential aeration. The experience of using the additive-plasticizer of coke-chemical production, which application will reduce the number of pores and capillaries, increase the strength, density, corrosion resistance of reinforced concrete is studied in the article. It has been experimentally established that the optimum amount of the additive is in the range between 0.6 ... 0.7% of the cement weight. The additive allows to save 5% of cement at achievement of the designed durability; reduces the vibration time of concrete mixture by 20 ... 30%; does not affect the quality of the concrete surface, does not lead to the bloating of temporary openings, provides the given strength and crack resistance of cement-concrete products, which allows to obtain reinforced concrete with high quality, reliability and durability.
Authors and Affiliations
Alexandra Doroshenko, Gennady Talavira
Keywords
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