Rubber recycled concrete and preparation method thereof

Abstract

The invention relates to rubber recycled concrete and a preparation method thereof. The mass ratio of cement to natural coarse aggregate to recycled coarse aggregate to natural fine aggregate to recycled fine aggregate to water to rubber powder to nano silicon dioxide to a polycarboxylic acid water reducing agent is 1: (2.03-2.12): (0.87-0.91): (1.04-1.14): (0.47-0.49): (0.46-0.52): (0.011-0.057): (0.005-0.031): (0.011-0.026), the water-binder ratio of the rubber recycled concrete is 1: (2-2.17), the recycled fine aggregate and the recycled coarse aggregate are waste gas concrete, the natural fine aggregate is natural river sand, the natural coarse aggregate is limestone gravel, the particle size of the recycled fine aggregate is 0.075-4.75 mm, the particle size of the recycled coarse aggregate is 5-20 mm, the particle size of the natural fine aggregate is 0.075-4.75 mm, and the particle size of the natural coarse aggregate is 5-25 mm. According to the rubber recycled concrete disclosed by the invention, waste gas concrete and rubber can be utilized, the rubber recycled concrete has excellent mechanical properties, and the problem of poor compression resistance of recycled concrete in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of recycled concrete preparation, and in particular relates to a rubber recycled concrete and a preparation method thereof. Background technique [0002] With the development of the automobile industry, a large number of waste rubber tires have been produced. According to statistics, more than 50 million waste rubber tires are produced in my country every year, and only a small part of waste tires are processed every year. A large number of untreated waste tires will bring huge environmental problems. With the in-depth advancement of industrialization and urbanization, the construction industry is developing rapidly, the amount of construction waste is increasing, and the consumption of resources is further accelerating. According to statistics, my country's urban construction waste accounts for 60% to 70% of the total construction waste. The total amount of construction waste accounts for 30% to 40% of th...

AI Technical Summary

Problems solved by technology

However, rubber powder is a hydrophobic material, which makes it weak in bonding ability with cement and other cementitious materials, and cannot form a good bonding interface. Moreover, the elastic modulus of rubber powder is relatively low, and a large amount of it is mixed into concrete to cause strength. reduce

These defects limit the promotion and application of rubber powder recycled concrete in practical engineering to a certain extent.