Enhanced admixture for municipal refuse recycled concrete as well as preparation method thereof and application thereof

Abstract

The invention belongs to the technical field of building materials and relates to an enhanced admixture for a municipal refuse recycled concrete as well as a preparation method thereof and the application thereof. The enhanced admixture comprises the following functional components for water reduction, enhancement, impurity shielding and the like in percentage by weight: 0-50% of polycarboxylic acid water reducer, 0-50% of highly efficient naphthalene water reducer, 0-50% of melamine resin water reducer, 0-50% of highly efficient aliphatic water reducer, 10-50% of lignosulfonate, 0.1-5% of sodium gluconate, 0.1-5% of sodium dodecyl sulfate, 0.1-10% of sodium silicate, 0.1-10% of potassium methyl silicate, 0.1-10% of sodium thiocyanate, 0.1-10% of sodium metaphosphate and 10-65% of water. In addition, the invention further discloses the preparation method and the application of the enhanced admixture. The enhanced admixture for the municipal refuse recycled concrete, provided by the invention, has the advantages of wide raw material source, simple production method, high production efficiency and obvious use effect and is suitable for large-scale industrial production.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and relates to a reinforced admixture (hereinafter referred to as a reinforcing agent) for urban waste recycled concrete and a preparation method and application thereof. Background technique [0002] In recent years, with the development of urban construction, a large amount of urban construction waste has been generated, including a large amount of waste concrete. The huge amount of waste concrete is not only expensive for disposal, but also requires a lot of empty space for storage, polluting the environment, wasting farmland, and becoming a major public hazard in the city. The resulting environmental problems are very prominent. Therefore, how to deal with these construction wastes reasonably has aroused widespread concern among government departments and the public. At the same time, with the continuous exploitation of natural sand and gravel, natural aggregate resources tend to be de...

AI Technical Summary

Problems solved by technology

[0004] However, due to the high mortar content of recycled aggregate, the characteristics of low apparent density, high water absorption, and high content of impurities such as mud powder make it show poor workability and poor mechanical properties in the actual production of concrete.

The usual production method is to increase water consumption or pre-wet the aggregate, but it cannot fundamentally solve the problem of using recycled aggregate

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