Polyethylene fiber-reinforced zeolite-fly ash-based geopolymer with ultra-high molecular weight and preparation method of polyethylene fiber-reinforced zeolite-fly ash-based geopolymer

Abstract

The invention relates to a polyethylene fiber-reinforced zeolite-fly ash-based geopolymer with an ultra-high molecular weight and a preparation method of the polyethylene fiber-reinforced zeolite-flyash-based geopolymer. The polyethylene fiber-reinforced zeolite-fly ash-based geopolymer comprises the following raw materials of: in parts by weight, 493-542 parts of low-calcium fly ash, 124-136 parts of high-calcium fly ash, 203 parts of quartz sand, 0-61 parts of zeolite, 160 parts of water, 38 parts of sodium hydroxide, 173 parts of sodium silicate and 5-50 parts of polyethylene fiber with anultra-high molecular weight, and the preparation method comprises the following steps of: adding the low-calcium fly ash, high-calcium fly ash, quartz sand and zeolite to a stirring pot, and performing even stirring to obtain a No.1 mixture; mixing the water, sodium hydroxide and sodium silicate evenly in a beaker to obtain an alkali activator, adding the alkali activator to the stirring pot so as to mix the alkali activator with the No.1 mixture to obtain a No.2 mixture, adding the polyethylene fiber with an ultra-high molecular weight to the No.2 mixture, performing stirring until the fiberis evenly dispersed, putting the obtained slurry into a mould, then performing curing in an oven, and then performing curing at room temperature so as to achieve molding. When the preparation methodis compared with the prior art, the product has the advantages of low cost, good material performance and the like.

Description

technical field [0001] The invention belongs to the field of materials science, in particular to an ultra-high molecular weight polyethylene fiber reinforced zeolite-fly ash base polymer and a preparation method. Background technique [0002] Geopolymer is a new type of inorganic silica-alumina gelling material with zeolite-like structure. It has many excellent properties such as rapid hardening and early strength, high strength, impermeability, frost resistance, corrosion resistance, fire resistance and solid sealing of heavy metals. Compared with traditional cement-based materials, its raw material sources are more extensive, and its preparation is convenient, energy consumption is small, and CO2 emissions are low, so it has been well applied in engineering, especially emergency repair and construction projects. However, due to the inherent weaknesses of low tensile strength and high brittleness of geopolymer materials, cracks in different degrees and in different forms ar...

AI Technical Summary

Problems solved by technology

[0004] However, since the coagulation and hardening mechanism of the geopolymer cementitious system is very different from that of common portland cement, many factors affect the strength of the composite material in the early reaction process, such as: the content of fly ash in the solid mixture , additional mineral content, etc.

Images