Anti-crack composite additive and oil-seepage-proof concrete with same

Abstract

The invention belongs to the field of building material engineering, in particular to an anti-cracking composite additive. According to the anti-cracking composite additive, through compounding of theplastic expansion component, the delayed hydration type CaO expansion component, the light burning nanometer MgO expansion component and the polymer water-absorbing resin, concrete shrinkage can be compensated in stages in application, and the polymer water-absorbing resin in the anti-cracking composite additive also has a synergistic effect. The invention further discloses oil-seepage-proof concrete based on the anti-crack composite concrete, the superfine coal ash and the superfine mineral powder can fill tiny gaps of the concrete, and the optimal close packing effect of a gelling system isformed; the organic silicon resin can be used for filling gel holes of the concrete and plays a role in blocking oily molecules due to the oleophobic effect so that the porosity, the compactness andthe oleophobicity of the oil-seepage-proof concrete are further reduced.

Description

technical field [0001] The invention belongs to the field of building material engineering, and specifically relates to an anti-crack composite additive and oil-seepage-proof concrete applied with the anti-crack composite additive. Background technique [0002] Some industrial buildings are often used in environments that are in contact with oil liquids, such as machinery processing plants, oil storage tank factories, oil depots, oil storage tanks, etc. At present, there are no relevant standards for oil-seepage-proof concrete in China, and there are no specific reference technical indicators. Most projects that are easily exposed to oil only use ordinary concrete with a high level of impermeability, but none of them can meet the requirements of long-term oil penetration prevention. [0003] When concrete is in contact with oily substances for a long time, it will be corroded by oily substances and the concrete structure will be damaged. The oil solution has low density, l...

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Problems solved by technology

However, both of these two schemes have disadvantages. Both of them do not consider the problem of long-term cracking and shrinkage of concrete. At the same time, scheme 2) can only ensure that a single component or two composite components can exert their respective technical advantages; however, the oil seepage prevention concrete The long-term crack problem and compactness in the early, middle and late stages are the technical problems that need to be focused on

[0006] In addition, the oil-proof concrete components in the prior art generally include compact components or special chemical reagents are added to improve the internal compactness of oil-proof concrete, and there are also single or two composite expansion agent components mixed to solve the crack resistance of concrete. However, the anti-cracking method of oil-proof concrete in the prior art is the technical index of impermeability, shrinkage rate and expansion rate, which cannot reflect the cracking resistance of actual oil-proof concrete

Quantitative evaluation of the crack problem of oil-proof concrete is the key technology to solve the oil-proof effect, and the above measures cannot guarantee the oil-proof penetration effect

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