Environment-friendly lightweight aggregate concrete and preparation method thereof

Abstract

The invention relates to the technical field of building materials, in particular to the technical field of high-strength lightweight aggregate concrete materials, and particularly discloses environment-friendly lightweight aggregate concrete and a preparation method thereof. The concrete is prepared from, by weight, 1 part of cement, 1.796-1.908 parts of pumice coarse aggregate, 0.356-0.796 part of pumice sand, 0.382-0.823 part of ferrous mill tailings, 0.005-0.015 part of additive and 0.315-0.45 part of water. The pumice coarse aggregate is subjected to hole sealing treatment, and a hole sealing material is formed by evenly mixing ordinary sand with granularity not larger than 1.18 mm and cement according to the mass ratio of 1:1. The environment-friendly lightweight aggregate concrete has the advantages of being low in manufacturing cost, high in strength and environmentally friendly; the preparation process is simple, the optimization and utilization of pumice resources and ferrous mill tailing waste are effectively achieved, and the concrete has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to the technical field of high-strength lightweight aggregate concrete materials. Background technique [0002] Traditional concrete has a large demand for sand and stone, and there are many phenomena of random mining and digging to obtain raw materials, resulting in serious damage to the land and ecological environment, and frequent natural disasters such as water and soil erosion. In addition, ordinary concrete has defects such as heavy weight and poor thermal insulation performance. [0003] Lightweight aggregate concrete refers to the use of lightweight aggregate, cement and water and other materials, the dry apparent density is not greater than 1950kg / m 3 of concrete. Compared with ordinary concrete, lightweight aggregate concrete has the characteristics of light weight, good seismic performance, and good heat preservation and durability. Since it was first applied...

AI Technical Summary

Problems solved by technology

A large number of stacking of tailings wastes precious land resources and also poses a threat to the surrounding environment. Now the general way to deal with it is to build tailings ponds, but this requires companies to pay a lot of money for construction and maintenance. Moreover, if it is not properly managed, it will easily lead to subsidence and landslides, causing potential safety hazards

[0008] In northern China, such as Hebei, the content of pumice is huge, but the utilization rate is low. If it is properly mined and used rationally, it can accelerate the diversification of enterprises, promote local economic development, and improve the employment status of nearby residents.

In addition, there are many small mines in Hebei. The large amount of tailings waste not only wastes precious land resources, but also brings severe challenges to the nearby ecological environment. Improper handling may even endanger the lives and property of surrounding residents.

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