High-compressive-strength rubber aggregate concrete and preparation method thereof

Abstract

The invention relates to high-compressive-strength rubber aggregate concrete, which is prepared from concrete base materials, rubber aggregates, steel fiber and water reducing agents, wherein the concrete base materials are prepared from nanometer silicon dioxide; the concrete base materials are prepared from gelling materials, stone and sand according to a mass ratio of (0.9 to 1.1):(0.6 to 0.9):(1.4 to 1.8); the gelling materials are prepared from cement and nanometer silicon dioxide; the volume mixing amount of the rubber aggregates is 50 to 100kg / m<3>; the volume mixing amount of the steelfiber is 70 to 120 kg / m<3>; the mass ratio of the water to the gelling materials is (0.28 to 0.33):1; the mass ratio of the water reducing agents to the gelling materials is (0.9 to 1.2):100. The compressive strength of the high-compressive-strength rubber aggregate concrete can reach C55 level; compared with that of traditional rubber aggregate concrete with the same water-binder ratio, the splitting tensile strength is improved by 50 percent or higher; the slump constant is 60mm or higher; the flowability and the water retaining capacity are good; the cement clinker is saved; the preparation process is simple and achieves an environment-friendly effect; the construction is easy.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a rubber aggregate concrete with high compressive strength and a preparation method thereof. Background technique [0002] According to statistics, the global stock of used tires has reached 6 billion. As of the end of 2015, my country's output of used tires has exceeded 330 million, with a total weight of 12 million tons. It has surpassed the United States to become the world's largest producer of used tires, and China every year The waste tires produced are increasing rapidly at a rate of 8% to 10%. By 2020, China's waste tire output will reach 20 million tons, which has become a new type of pollution that has been neglected in front of us. At present, the amount of various waste rubber recycled and reused in my country is very small, and the recycling rate is only 5%, which is 3 to 4 percentage points lower than the advanced level of foreign countries. With th...

AI Technical Summary

Problems solved by technology

For example, the modification method is single, and the tensile and compressive strengths cannot be improved correspondingly at the same time; the performance of modified concrete is poor, and it is not suitable for structural members; only the improvement of strength is pursued, without the use of coarse aggregate, and the universal application of engineering The performance is not high, for example, CN104891886A disclosed invention patent application "rubber steel fiber concrete" in the configuration process chooses fine sand, does not use coarse aggregate

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