Graphene modified assembled high strength sleeve connecting mortar

Abstract

The invention provides graphene modified assembled high strength sleeve connecting mortar. The graphene modified assembled high strength sleeve connecting mortar includes graphene modified magnesium oxychloride cement, portland cement, fly ash with moisture content less than 0.2%, mineral powder with particle size less than 3.5 micrometers, mineral admixture consisting of alumina powder with particle size less than 10 micrometers and silica with particle size less than 0.3 micrometer, aggregate consisting of river sand with the particle size of 0.05-2.5 millimeters and sea sand with the particle size of 0.5-5 millimeters, polycarboxylate high performance water reducer and water, wherein preparation method of graphene modified magnesium oxychloride cement clinker includes the steps of conducting pretreatment of graphene oxide solution by hydrophilic modification of alkaline substances, adding the pretreated graphene oxide solution to magnesium oxychloride cement raw meal to be mixed evenly firstly and then conduct heating reaction, high temperature calcination and fully grinding to obtain the graphene modified magnesium oxychloride cement. With the graphene modified magnesium oxychloride cement and Portland cement as main raw materials, the prepared assembled sleeve connecting mortar has the advantage of having excellent engineering properties and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of prefabricated building mortar materials, and in particular relates to a graphene-modified prefabricated high-strength sleeve connection mortar. Background technique [0002] With the rapid development of modern productivity, the construction industry has become the economic pillar of many countries, and the traditional cast-in-place construction mode not only pollutes the environment greatly, but also has a long production cycle, and cannot well meet the requirements of special building structures. Prefabricated buildings It is a building that assembles prefabricated components produced by the factory on site according to specific rules. The prefabricated building not only saves labor, reduces production costs, and improves construction speed, but also is less affected by the external environment and the external environment, making it more green. Environmental protection and prefabricated buildings have ...

AI Technical Summary

Problems solved by technology

It can be seen from the above-mentioned prior art that most of the grouting mortars for prefabricated concrete sleeve connections use Portland cement and sulphoaluminate cement compound system as the main gel material, and the early and late strengths of this mortar are both high , but due to the complex composition of raw materials, the mixing ratio needs to be adjusted frequently, and retarders such as grafted gypsum are needed to improve the mechanical properties and expansion properties of the composite system, and the stability is poor