Masonry mortar made from mine tailings

Abstract

The invention belongs to the technical field of building materials, in particular to a masonry mortar made from tailings. It is characterized in that the production of masonry mortar made of tailings that meets M2.5-M10 has the following proportions by weight: 100-245 parts of Portland cement, 1270 parts of tailings, 234-56 parts of lime paste, and 1 part of water reducing agent. -1.36 parts, water 277 parts. The present invention uses tailings with a particle size of 0.15-0.3 mm, which is obtained by grading through screening equipment in the gravity separation and magnetic separation processes, and its purpose is to avoid the incorporation of harmful components and the fluidity of the mortar with too fine tailings particle size, which cannot construction. Its production cost is about 20 yuan per cubic meter, about 60 yuan can be saved per cubic meter, and the annual benefit is about 180 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 the mining of river sand, and ultimately achieve the purpose of less rural land occupation and environmental protection.

Description

Technical field [0001] The present invention is the field of building material technology, especially a masonry mortar made of tailings. Background technique [0002] The masonry mortar is an indispensable raw material for building materials. The proportion of river sand contained in it is about 70%. At present, my country's river sand resources are very tight.Taking Anshan City as an example, urban construction needs to consume a large amount of river sand each year. Only 500,000 cubic meters of river sand are required for darning concrete each year.River sand consumes between 200 and 3 million cubic meters. Therefore, an alternative material is urgently needed to reduce the mining and damage of natural river sand.The tailings excreted by the minerals are a good river sand substitute.At present, the tailings of the minerals are transported to the tailings and pipelines. A large number of tailings are stacked in the tailings. They not only occupy a large amount of rural land, but...

AI Technical Summary

Problems solved by technology

At present, the tailings of the concentrator are transported to the tailings pond by pipelines for stacking. A large amount of tailings are stacked in the tailings pond, which not only occupies a large amount of rural land, but also causes serious pollution to the surrounding environment.