Machine-sprayed thick-layer polymer repairing mortar and preparation method thereof

Abstract

The invention relates to the field of building materials, and provides machine-sprayed thick-layer polymer repairing mortar to overcome the problem that conventional repairing mortar is difficult to meet repair requirements. The machine-sprayed thick-layer polymer repairing mortar comprises the following components by mass: 10-15 parts of Portland cement, 5-7 parts of water, 8-12 parts of fly ash,70-77 parts of sand, 10-12 parts of nanometer silicon dioxide, 3-5 parts of an ethylene-vinyl acetate copolymer, 1-2 parts of tetraphenyl dibenzodiindenopyrene and 0.5-1 part of 9,10-diphenylanthracene. The preparation method comprises the following steps: S1, adding 1/2 of water, fly ash, sand and nanometer silicon dioxide into a reaction container, and carrying out uniform mixing under stirringto form a pre-mixture; and S2, adding the rest components into the pre-mixture while stirring, and carrying out uniform mixing under stirring to obtain the machine-sprayed thick-layer polymer repairing mortar. The compressive strength and the bonding strength of the machine-sprayed thick-layer polymer repairing mortar are improved, so the application range of the machine-sprayed thick-layer polymer repairing mortar is expanded, the repairing mortar is not prone to cracking, frequent repairing is not needed, and energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a machine-sprayed thick-layer polymer repair mortar and a preparation method thereof. Background technique [0002] Repair mortar is a special cement-based polymer mortar used for concrete structure surface defects and reinforcement construction. It has high compressive strength, cohesiveness, crack resistance and water resistance. It can be used in industrial and civil cracked concrete. The surface of the building is repaired, or the industrial and civil buildings that have been damaged and cannot meet the design requirements are repaired. [0003] However, at present, in repair projects, especially in ancient building repair projects, most of them are large in area, have no shrinkage joints, and are newly done by ancient methods. The bonding performance of the repair mortar has higher requirements, which makes it difficult for the existing repair mortar to meet the demand, so...

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Problems solved by technology

[0003] However, at present, in repair projects, especially in ancient building repair projects, most of them are large in area, have no shrinkage joints, and are newly made by ancient methods. Therefore, in addition to high requirements for the foundation strength of the repair mortar, the The bonding performance of repair mortar has higher requirements, which makes it difficult for the existing repair mortar to meet the demand, so there is still room for improvement

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