Method for treating and regenerating reuse building waste
A technology of construction waste and regenerated fine powder, which is applied in the field of construction waste treatment and recycling, can solve the problems of building durability and safety hazards, river safety, and hidden dangers of flood control and disaster resistance, and achieves the effect of expanding sources.
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Embodiment 1
[0048] The regenerated fine aggregate prepared from waste concrete is mixed into Portland cement with a particle size of 0-5 mm. The water absorption rate of the crushed regenerated fine aggregate is 6.5%, and the mass ratio of it to cement is 5:1. Mixed with water, it can form masonry mortar, and its grade can reach M7.5.
Embodiment 2
[0050] After mixing high-quality regenerated fine aggregates prepared from waste concrete, waste stone and waste ceramics with a particle size of 0.15-0.8mm in a ratio of 60:30:10, the water absorption rate of the regenerated fine aggregates is 4.5%. Sand, 42.5R grade Portland cement, fly ash, cellulose ether and rubber powder, the mass ratio of which to quartz sand, cement, fly ash, cellulose ether and rubber powder is 32:20:40:5: 0.5:2.5, can form tile adhesive (a special dry-mixed mortar), and its performance can meet the requirements of C1 type tile adhesive.
Embodiment 3
[0052] After mixing the regenerated fine aggregate prepared from waste concrete and waste concrete small hollow blocks in a ratio of 60:40, the water absorption rate of the regenerated fine aggregate is 6.5%, and mixed with gravel, Portland cement, and fly ash, The mass ratio of it to gravel, Portland cement and fly ash is 700:1100:300:100, and it is mixed with water and high-efficiency water reducing agent (controlling the water-binder ratio to 0.35) to form new concrete. The strength level can reach C45.
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