Special concrete using waste and old rubber particle and steel slag particle as aggregate

Abstract

The invention provides a special concrete using waste and old rubber particles and steel slag particles as aggregate, which comprises the following components in parts by mass: 100 parts of cement, 0.1-3 parts of water reducing agent, 0-50 parts of mineral admixture, 0-600 parts of sand, 200-400 parts of steel slag particle, 15-50 parts of rubber particle and 20-80 parts of water. The invention has the advantages that the two wastes of the waste and old rubber particles and steel slag are simultaneously added into concrete, the wastes can be greatly utilized, and the natural environment is improved; the expansion stress of free calcium oxide in steel slag is adsorbed by utilizing the elastic characteristic of the waste and old rubber particles, the steel slag can be utilized without special processing, and the integral volume stability of materials is high; by adding the waste and old rubber particles, the elasticity of the special concrete is higher than that of common concrete; and the special concrete can be widely applied to places in which common concrete, such as road surfaces, parking lots, buildings, and the like can be applied.

Description

technical field [0001] The invention belongs to the technical field of special concrete, and in particular relates to a special concrete with waste rubber particles and steel slag particles as aggregates. Background technique [0002] Steel slag is a kind of waste slag produced in the steelmaking process. Because it contains overburned free calcium oxide, after the cementitious material has hardened, it reacts with water to form calcium hydroxide, which causes the volume of the structure to expand in the later stage, which will lead to structure damage. On the other hand, because the hardness of steel slag is very large, it is very difficult to crush and grind it. At present, the utilization of steel slag is mostly as roadbed cushion, and has not been widely used. At present, the steel slag in various steel mills is piled up like mountains, which not only occupies land resources, but also causes environmental pollution and serious damage to natural landscapes. [0003] Wast...

AI Technical Summary

Problems solved by technology

[0002] Steel slag is a kind of waste slag produced in the steelmaking process. Because it contains overburned free calcium oxide, after the cementitious material has hardened, it reacts with water to form calcium hydroxide, which causes the volume of the structure to expand in the later stage, which will lead to structure damage. On the other hand, due to the high hardness of steel slag, it is very difficult to crush and grind. At present, steel slag is mostly used as roadbed cushion and has not been widely used.

At present, the steel slag piled up in various steel mills not only occupies land resources, but also causes environmental pollution and serious damage to natural landscapes.

[0003] Waste rubber particles are broken from waste rubber tires and other waste rubber, because the molecular structure of rubber itself determines that it cannot be recycled and reused like plastics, so it is also very difficult to reuse waste rubber. Most of the current utilization methods It is used to lay rubber runways after crushing, but the utilization is very limited.