Recycled concrete additive and preparation method thereof

Abstract

The invention relates to the technical field of concrete processing, and discloses a recycled concrete additive and a preparation method thereof. The concrete is characterized by comprising, by weight, 250-260 parts of cement, 775-875 parts of medium sand, 700-750 parts of broken stone, 50-80 parts of waste tire micro powder, 10-12 parts of bamboo fiber, 40-50 parts of fly ash, 40-50 parts of construction waste powder, 50-80 parts of quartz sand powder, 10-20 parts of lithium powder, 10-20 parts of silicon powder, 0.1-0.8 part of potassium silicate, 2-8 parts of polyethylene glycol, 1-4 parts of polypropylene fiber, 2-5 parts of aloe, 3-12 parts of a film forming aid, 4-5 parts of a retarder, 4-5 parts of a water reducer, 1-2 parts of a modifier and 200-240 parts of water. The waste tire micro powder and the coal ash are matched with each other, so that the toughness of the concrete is enhanced, and meanwhile, the cracking of the concrete is reduced; and the added activated sludge and modified straw fiber not only can play a role in reducing the use amount of cement, but also can enhance the strength of the concrete, and the added water glass generates a substance with swelling and compactness, so that the surface tension of water in capillary tubes inside the recycled concrete is reduced, and the shrinkage of the recycled concrete can be reduced.

Description

technical field [0001] The invention relates to the technical field of concrete processing, in particular to a recycled concrete additive and a preparation method thereof. Background technique [0002] In recent years, the world's construction industry has entered a stage of rapid development. As the largest man-made material, the occupation of natural resources and the negative impact on the environment have also triggered discussions on sustainable development issues; The amount of waste concrete and waste concrete discharged from concrete factories and prefabricated component factories is huge. At the same time, it is expected that the amount of waste concrete discharged will increase with the acceleration of socialization worldwide, and the demolition and renovation of original buildings will increase day by day . The traditional treatment method of waste concrete is mainly to transport it to the suburbs for stacking or landfill, which not only costs a lot of freight, c...