Fly ash based geopolymer high-strength grouting material and preparation method thereof

Abstract

The invention discloses a fly ash based geopolymer high-strength grouting material which comprises the following components in parts by weight: 10-20 parts of an alkali activator, 30-45 parts of fly ash, 2-10 parts of silica fume, 1-5 parts of plant ash, 30-45 parts of sand, 1-5 parts of superfine powder, 0.1-5 parts of an expanding agent, 0.1-0.5 part of an antifoaming agent and 3-8 parts of water. According to the geopolymer high-strength grouting material provided by the invention, active materials such as the fly ash, silica fume, and plant ash serving as binders are activated by the alkali activator, mixed with graded sand and matched with a small usage amount of expanding agent, antifoaming agent and the like so as to prepare the high-strength grouting material with early strength, rapid hardening, high fluidity and micro expansion. The invention further discloses a preparation method of the fly ash based geopolymer high-strength grouting material. The preparation method is easyand rapid to implement, energy-saving and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of high-performance concrete, in particular to a fly ash base polymer high-strength grouting material and a preparation method thereof. Background technique [0002] With the emergence and development of high-strength and high-performance concrete, the emergence of high-strength grouting materials has made grouting materials no longer limited to equipment foundation grouting, and has rapidly expanded to building foundation reinforcement, building reinforcement, building beams, slabs, column reconstruction, Sleeve grouting and many other uses. At present, the widely used high-strength cement-based grouting material is easy to produce micro-cracks due to the large volume shrinkage of ordinary Portland cement, which leads to inconsistency under the bearing plate after the support is installed, and the strength of cement-based grouting material develops slowly , poor durability, will directly affect the structu...

AI Technical Summary

Problems solved by technology

However, the defect of this material is very obvious. Excessive use of mixed powder materials will inevitably lead to poor volume stability of the finished product. Secondly, its 28-day strength is only 21.16MPa, which cannot meet the strength requirements of grouting materials.

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