Cement based grout mortar formula

Abstract

The invention belongs to the field of mortar composition containing a low temperature phosphate binder. The cement based grout mortar formula is composed of gel materials, additives, water and sand, and the gel materials consists of silicate cement and phosphorus slags at a mass fraction ratio of 70-80 to 20-30. The phosphorus slags used in the scheme are used as an active admixture to replace parts of cement, on the one hand can satisfy the requirement of high performance of the cement based grout mortar, on the other hand can reduce the cost of cement, can realize the reutilization of the phosphorus slags, and are environmental protective. In order to solve the contradiction between the delayed coagulation effect of the phosphorus slags and the high early strength of the cement based grout mortar, the experiment shows that when the addition of the phosphorus slags accounts for 20-30 parts in the gel materials, the mortar has a higher early strength and a good operative time.

Description

technical field [0001] The invention belongs to the field of mortar composition containing cold phosphate binder. Background technique [0002] Phosphorus slag is a molten material with calcium silicate as the main component obtained when yellow phosphorus is produced by the electric furnace method. After quenching, it is granulated electric furnace phosphorus slag. Its composition is similar to that of slag, referred to as phosphorus slag. Usually, about 8-10 tons of phosphorus slag are produced for every ton of yellow phosphorus produced. For example, in 2002, the actual output of yellow phosphorus in China was about 690,000 tons, and the discharge of phosphorus slag was about 5.6-7 million tons. The discharge of a large amount of waste residue not only wastes resources, occupies cultivated land, pollutes the environment, but also poses a great obstacle to the sustainable development of the environment. [0003] The main components of phosphorus slag are silicate and alum...

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Problems solved by technology

[0004] The composition of cement-based grouting mortar is similar to that of concrete. It is roughly composed of cement, admixture (fine filler), fine aggregate (fine aggregate), high-efficiency water reducing agent, water retention agent, coagulation regulator, early strength agent, expansion agent and Defoamer and other materials are required to have high early strength and late strength (compressive strength 1d≥22.0MPa, 3d≥40.0MPa, 28d≥70.0MPa), so if you want to use phosphorus slag as an admixture, you must It is necessary to overcome the problem that the relatively high early strength (referred to as early strength) required by the grouting mortar cannot be met when the phosphorus slag with retarding effect is configured with cement-based grouting mortar

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