Recycled aggregate reinforcing agent and preparation method thereof, and recycled aggregate concrete
A technology of recycled aggregate and recycled coarse aggregate, which is applied in the field of building materials, can solve the problems of many defects, many edges and corners of recycled aggregate particles, and increase the processing cost of recycled aggregate, so as to achieve the effect of increasing the usage amount and reducing the content of stone powder
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Embodiment 1
[0025] This embodiment provides a recycled aggregate reinforcing agent, including the following components in parts by weight: 1-10 parts of microsilica, 5-25 parts of fly ash, 0.5-10 parts of water glass, 0.8-2 parts of sodium hydroxide 20-80 parts of mineral powder, 5-20 parts of water. Among them, the weight ratio of fly ash and mineral powder is 1:2.5-10, the weight ratio of micro silica fume and mineral powder + fly ash is 1:10-50, water + water glass and mineral powder + fly ash + The weight ratio of silica powder is 1:1-10.
[0026] The mass percentage of silicon dioxide in the microsilica powder is 80-96%, and the average particle diameter of the microsilica powder is 0.1-0.3 microns.
[0027] The above-mentioned fly ash is Class F fly ash, and the average particle size of the fly ash is 100-200 mesh.
[0028] The modulus of the above-mentioned water glass is 2.5-3.5, and the solid content is 25%-40%. The optimal value of the modulus is 3.0, and the solid content is ...
Embodiment 2
[0031] This embodiment provides a recycled aggregate reinforcing agent. As a preferred solution of Embodiment 1, it includes the following components in parts by weight: 2.5 parts of microsilica, 10 parts of fly ash, 10 parts of water glass, and 1.7 parts of sodium hydroxide. part, 75 parts of slag powder, 12 parts of water, the weight ratio of described fly ash and slag powder is 1:7.5, the weight ratio of described silica fume and slag powder+fly ash is 1:34, and the weight ratio of described water The mass ratio of water glass to mineral powder + fly ash + silica powder is 1:4.86.
Embodiment 3
[0033] This implementation provides a kind of preparation method of recycled aggregate, comprising the following steps:
[0034] Step 1. Weigh 1-10 parts of silica fume, 5-25 parts of fly ash, 0.5-10 parts of water glass, 0.8-2 parts of sodium hydroxide, 20-80 parts of mineral powder, and 5-20 parts of water ;
[0035] Step 2, mix microsilica powder and sodium hydroxide evenly, mix water and water glass uniformly to obtain a mixed solution, add the mixture of microsilica powder and sodium hydroxide to the mixed solution to obtain a new mixed solution, and mix the fly ash And the mineral powder is added to the new mixed solution to obtain the recycled aggregate reinforcing agent.
[0036] Recycled aggregate concrete is prepared according to the strength grade requirements, and the corresponding reinforcing components are prepared to strengthen the recycled coarse aggregate first, and then make concrete according to the fixed concrete mix ratio; it is also possible to keep the ...
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Abstract
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