Concrete based on limestone powder supplementary cementing material

Abstract

The invention discloses concrete based on a limestone powder supplementary cementing material, and belongs to the field of concrete. A water-binder ratio of the concrete is between 0.35 and 0.55; the concrete comprises the following components in percentage by weight: 12-24 percent of cementing materials, 20-34 percent of sand, 47-50 percent of stones, and 6.5-8.5 percent of water, wherein an addictive accounts for 1.5 percent of the cementing material; the cementing material having a cementing function in the concrete is formed by mixing limestone powder and silicate cement; based on the weight percentage, the common silicate cement accounts for 60-90 percent, the limestone powder accounts for 40-10 percent, and the specific surface area of the limestone powder is 350m<2> / kg. The concrete has the advantages that the concrete is prepared by the limestone powder used as a supplementary cementing material of the silicate cement, so that the acid resistance erosion ability of the fine limestone powder concrete is improved; the source of the material is rich, and stone crumbs generated during production of waste stone materials and machine-made sand are used as raw materials so as to solve the problems of deficiency of mineral admixtures and environment pollution of the waste stones in our country; and the preparation cost of compound cement and the concrete can be greatly reduced at the same time.

Description

technical field [0001] The invention relates to concrete, in particular to concrete based on limestone powder auxiliary cementitious material. Background technique [0002] 1. There are problems in my country's cement production: the contradiction of redundant construction and overcapacity has not been effectively resolved; the number of outdated production capacities is large; the overall industrial concentration is still low; resource waste, environmental pollution, and disordered production are still relatively serious. [0003] 2. There are problems in the development of the concrete industry: high energy consumption and serious pollution; fierce competition and small profit margins; problems in the development of new concrete. [0004] 3. At present, fly ash is the most used mineral admixture in my country, but the distribution of fly ash resources is uneven, and the supply of fly ash is insufficient in many areas. [0005] 4. my country is rich in limestone mineral re...

AI Technical Summary

Problems solved by technology

[0006] Technical problem: The purpose of this invention is to provide a concrete based on limestone powder auxiliary cementitious material, to solve the problems of insufficient mineral admixture, waste stone stacking and environmental pollution