Preparation method capable of improving mechanical properties of mortar

Abstract

The invention discloses a preparation method capable of improving mechanical properties of mortar. Materials used in the preparation method include lithium slag, fly ash or steel slag as a mineral admixture, ordinary Portland cement, standard sand, water and a polycarboxylate water reducing agent, wherein 450 parts of the ordinary Portland cement, 405-1350 parts of the standard sand, 405-1350 parts of the lithium slag or fly ash or steel slag, 225 parts of water and 0-5 parts of the polycarboxylic acid water reducing agent are used. The flexural strength and the compressive strength of the cement mortar prepared by the preparation method are increased by 128% and 83% at most respectively, and the density is reduced by 24% at most; when the mechanical properties of the mortar reach the maximums, the using amounts of the lithium slag, the fly ash and the steel slag in the scheme are 3 times, 4.5 times and 15 times of that of replaced cement. Therefore, the mortar prepared by the preparation method has the functions of reinforcement and light weight; meanwhile, a large amount of industrial waste is used, so that environmental pollution of the industrial waste is reduced, and relatively large social, economic and environmental benefits can be brought.

Description

technical field [0001] The invention relates to a preparation method for improving the mechanical properties of mortar, and belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Lithium slag is a by-product produced by refining lithium carbonate with spodumene ore as raw material through the concentrated sulfuric acid-calcium carbonate method, and its emission is about 10 times that of lithium carbonate production. The appearance of lithium slag is khaki, the inner surface area is large and porous, and it has no hydraulicity. The chemical composition of lithium slag is very similar to that of clay, and the main composition is SiO in amorphous form. 2 and Al 2 o 3 Mainly. At present, some lithium slag has been used as a mixed material in cement and concrete, but its utilization rate is low. [0003] Steel slag is a by-product of the iron and steel industry, and its output is about 10% to 15% of crude steel output. At present, th...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method for improving the mechanical properties of mortar to solve the problem of low stockpiling and utilization of industrial waste, in order to improve the mechanical properties of mortar and use industrial waste in large quantities