Production method of tunnel cement mortar

Abstract

The invention discloses a production method of tunnel cement mortar. Raw materials of the tunnel cement mortar include sand aggregate, fast-hardening sulfoaluminate cement, a compound coupling agent,dispersible emulsion powder, a defoaming agent, a retarder, cellulose ether, starch ether, anti-crack fiber and a water reducing agent. The defects of inherent hardness and brittleness of mortar are overcome, the crack resistance, seepage resistance, hollowing reduction, bonding force increase and the like of the mortar are improved, the mortar is better suitable for mechanical construction and has the advantages of being small in addition amount and high in cost performance, the strength of the mortar is improved, and the problems that mortar is dry and can not be scraped easily, is low in bonding strength and prone to hollowing and shedding phenomena, and is large in contraction and prone to surface cracking are solved, the tunnel cement mortar is high in activity and durability, the early-stage strength of the mortar is improved, the seepage resistance and freezing resistance of the mortar are remarkably improved, and the work performance of the mortar is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a production method of tunnel cement mortar. Background technique [0002] Mortar, the bonding substance used in building bricks, is composed of a certain proportion of sand and cementing materials (cement, lime paste, clay, etc.) plus water, also called mortar, and also used as mortar. Mortar is made by mixing cementitious materials (cement, lime, clay, etc.) and fine aggregate (sand) with water. Commonly used are cement mortar, mixed mortar (or cement-lime mortar), lime mortar and clay mortar. [0003] Mortar is one of the most widely used building materials in construction engineering, and it is widely used in masonry and plastering of buildings. In my country's current construction projects, more than 60% of buildings still use wall materials such as bricks and blocks, and the construction mortar used in masonry and plastering construction is still mainly cement ...

AI Technical Summary

Problems solved by technology

At the same time, because the excessive exploitation of natural river sand will cause damage to the ecological environment, with the implementation of environmental protection policies, many areas in my country have begun to limit or ban the mining of natural river sand. Now, the available natural river sand resources are reduced, and natural sand and gravel are very It is difficult to meet the needs of human beings, and more and more broken limestone or machine-made sand is used to replace river sand, so it is imperative to develop high-quality and high-quality mortar

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