Fly Ash Fluid Concrete Made from Tailings

Abstract

The invention belongs to the technical field of building materials, and in particular relates to a fly ash fluid concrete made from tailings. The proportion by weight of the tailings fly ash fluid concrete meeting the requirements for the production of C20-C35 concrete is as follows: Portland cement 100-137 parts, 273-261 parts of gravel, 163-153 parts of tailings, 34-29 parts of fly ash, 1-1.5 parts of pumping agent, 58-49 parts of water. Tailings particle size is 0.15-0.3 mm. The pumping agent is an improved NST-5, JZ-1 or LF-5 high-efficiency pumping agent. According to the production process of fluid concrete, C20 fly ash fluid concrete is produced. The cost of using tailings to replace river sand is about 20 yuan, and it can save about 60 yuan per cubic meter. Based on the replacement ratio of 100%, the annual benefit is about 360 million yuan. In addition, the replacement of river sand with tailings can also reduce the discharge of mine tailings, extend the service life of tailings ponds, reduce the damage to natural rivers caused by river sand mining, and ultimately achieve the purpose of less rural land occupation and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to fly ash fluid concrete made from tailings. Background technique [0002] Concrete is an indispensable raw material for building materials. The annual consumption of concrete in the country is about 600 million cubic meters, and the proportion of river sand mixed with concrete per cubic meter is about 0.4 cubic meters. The annual consumption of river sand is as much as 240 million cubic meters. River sand resources in my country are very tight, and river sand mining has seriously damaged natural river courses. Taking a certain area as an example, urban construction needs to consume a large amount of river sand every year. The fluid concrete alone needs about 1.5 million cubic meters of river sand every year. There are other river sand consumptions such as concrete, masonry mortar, and plastering mortar. It is conservatively estimated The river sand consumption in the ...

AI Technical Summary

Problems solved by technology

[0003]At present, the tailings of the concentrator are sent to the tailings storage by pipelines for stacking. A large amount of tailings are stacked in the tailings storage, which not only takes up a lot of rural land, but also Serious pollution to the surrounding environment