Foam concrete for sewage filtration and preparation method thereof

Abstract

The invention discloses foam concrete for sewage filtration. The foam concrete comprises the following raw materials in parts by weight: 0-250 parts of a cementing material, 50-300 parts of an admixture, 0-20 parts of a reinforcing agent, 0-10 parts of a water reducing agent, 0-5 parts of a modifier, 0-5 parts of a foaming agent and 50-400 parts of water, the method comprises the following steps:(1) weighing the raw materials; (2) sequentially adding the water, the reinforcing agent, the modifier, the water reducing agent, the admixture and the cementing material, and uniformly stirring; (3)mixing with foaming foam of the foaming agent; and (4) pumping into a mold to obtain the product. According to the invention, a surfactant is used for physical foaming, and the foaming agent is used for modification, so that the foam concrete with high continuous porosity, good permeable effect and high strength can be produced, the sewage treatment effect is excellent, and the pore size can be adjusted according to volume weight or proportion; the foam concrete is naturally cured, the longer the time is, the higher the strength is, and the strength increase is stable.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a foam concrete used for sewage filtration and a preparation method thereof. Background technique [0002] With the continuous development and construction of the city, the sewage in the city is increasing. At present, urban domestic sewage has become the main pollution source of urban water in my country. A large amount of sewage discharge not only destroys ecology, but also seriously endangers industrial and agricultural production and human health and safety. Therefore, urban sewage treatment is the top priority in the current and future urban water environment protection work. [0003] For the treatment process of urban sewage, one of the key items is the filtration of sewage, and the selection of filter materials is particularly important. The traditional filter material is the waste produced by the aerated block factory. As a filter material, it needs to have g...

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Problems solved by technology

The traditional filter material is the waste produced by the aerated block factory. As a filter material, it needs to have good water permeability, be able to permeate water, and at the same time be able to filter out a large part of the particulate matter, and most of the aerated blocks (aerated concrete blocks) exist The problems are: 1. The density is generally 800kg / m 3 Left and right, the bulk density is relatively large, the pore size is small, and it is not easy to permeate; 2. The foaming of aluminum powder is a chemical foaming process, and most of the pores are closed cells, with a low continuous porosity, which is not conducive to water permeability; The strength increases rapidly in the early stage, and the pulverization problem is prone to occur in the later stage, and the durability of the material is poor; 4. The size of the waste particles left during the cutting of the block factory is different, most of which are powdery, and the treatment before use is troublesome; 5. The aerated block factory Most of the waste is generally recycled, and it is difficult to purchase sewage treatment plants

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