Cement-based water permeable brick with cementing strength being improved by aluminum dihydrogen phosphate and lithium ore slag synergistically

Abstract

The invention discloses a cement-based water permeable brick with the cementing strength being improved by aluminum dihydrogen phosphate and lithium ore slag synergistically. The brick is prepared from the following raw materials in parts by weight: 40 to 43 parts of granite corner waste, 30 to 32 parts of waste concrete, 20 to 22 parts of 42.5-grade ordinary Portland cement, 2 to 2.5 parts of polyester-cotton fabric leftover materials, 0.1 to 0.12 part of epicholorohydrin-dimethylamine polymer, 0.3 to 0.4 part of an early-strength type polycarboxylate superplasticizer, a proper amount of water, 2 to 3 parts of lignin-based hydramine, 1 to 1.5 parts of aluminum dihydrogen phosphate, 7 to 8 parts of the lithium ore slag and 1.5 to 2.5 parts of gelatin. The brick adopts the energy-saving and environment-friendly raw materials, the production cost is lowered, the compressive strength and the permeation coefficient are good, and the brick is applicable to paving of urban road surfaces, is capable of fast absorbing rainwater, and is not prone to cause urban inland inundation.

Description

technical field [0001] The invention relates to the technical field of permeable bricks, in particular to a cement-based permeable brick whose bonding strength is modified by aluminum dihydrogen phosphate and lithium slag. Background technique [0002] In recent years, during the rainy season, the phenomenon of "watching the sea" has occurred frequently in major cities. Permeable ground has attracted more and more attention from researchers because of its advantages of alleviating the flood discharge pressure of urban drainage systems, replenishing groundwater resources, improving the living conditions of urban surface plants and soil microorganisms, making groundwater easy to evaporate and eliminating the urban heat island effect. Permeable pavement facilitates air and moisture circulation, eliminates the heat island effect, and absorbs and reduces noise. Permeable pavement bricks are the main components of urban permeable pavement, mainly including cement-based permeable ...

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Problems solved by technology

[0003] In the article "Research on Optimizing the Production of Permeable Bricks Using Waste Concrete", waste concrete was used to replace natural aggregates, and the orthogonal design test method was used to analyze aggregate particle size, bone-to-cement ratio, water-cement ratio, and water reducing agent, silica fume and waste concrete. The influence of different dosages on the strength and water permeability coefficient of permeable bricks was obtained, and the optimal mix ratio was obtained. The strength of permeable bricks made with the strengthening of recycled aggregates and the improvement of curing methods was improved, which met the laying requirements and realized the waste Utilization, energy saving and emission reduction, but due to the limited increase in strength and the fluidity of concrete, slurry sinking is prone to occur when the brick body is formed, blocking the seepage channel affects water permeability, and the cement layer is due to slurry, the joints at the joints The cement layer will become thinner, which is not conducive to the development of brick strength