Technology for producing secondary aggregate for concrete by electric pulse fragmentation
This article is devoted to the problem of high-quality recycling of reinforced concrete products. This problem has appeared as a result of the constant growth of the volume of construction waste, about 40% of which is reinforced concrete. Nowadays effective and qualitative method for reprocessing of such products does not exist. A technological line for recycling of reinforced concrete structures is proposed in the article. It consists of two plants, the principle of action of which is based on the method of electric pulse fragmentation, developed in the 1940’s by Soviet scientists. It consists in the effect of the excess of the dielectric strength of liquid media over the dielectric strength of solid bodies, which occurs due to the fact that when the exposure time of an impulse voltage is less than seconds the dielectric strength of liquids is higher than this characteristics of solid dielectrics. This method allows to crush reinforced concrete into individual components: reinforcement cage, coarse aggregate, fine aggregate and cement stone, which are applicable for their primary function usage. Advantages of the proposed technology are the ability to perform complete recycling of reinforced concrete products and to obtain the aggregate with a low content of dust particles and cement stone, due to which the strength of concrete decreases slightly during the secondary usage.