Novel self-leveling mortar and production technology thereof

Abstract

The invention relates to novel self-leveling mortar and a production technology of the mortar. The mortar comprises the following components in percent by weight: 3-60% of modified cement, 10-66% of modified semi-hydrated gypsum, 0.1-8% of fly ash, 0.07-1.5% of a cement modifier, 0.05-1.5% of a gypsum modifier, 0.04-0.8% of a thickening time control agent, 0.01-0.1% of an anti-swelling agent, 0.01-0.2% of a stabilizer, 0.01-0.2% of a defoaming agent, 0.2-0.4% of toner, 0.05-0.13% of a smoother and 30-86% of aggregates. According to the novel self-leveling mortar, natural semi-hydrated gypsum and industrial solid gypsum are modified, and then subjected to modification and compounding with the fly ash and the cement to form a novel building material; a novel product which is better in production leveling property, higher in tensile strength, higher in compressive strength, adjustable in setting time, higher in construction efficiency, wide in application scope, low in cost and cracking-resistant is realized.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a novel self-leveling mortar and a production process thereof. Background technique [0002] In construction engineering, mortar is an important and commonly used material, especially mortar for the ground. More importantly, it is a material that must be used in every building such as residences, industrial plants and hospitals. In order to save manpower, material resources, Improve the construction speed, civilized construction, reduce pollution, use self-leveling self-leveling mortar, the existing cement-based self-leveling mortar: cement as the basic material, sand as the auxiliary material, adding accelerator, water reducing agent, water retention agent The disadvantages of cement-based self-leveling mortar are: 1. The setting speed of cement-based self-leveling mortar is slow, and the early strength is low. It takes 28 days to reach the highest strength, so the construction...

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Problems solved by technology

[0002] In construction engineering, mortar is an important and commonly used material, especially mortar for the ground. More importantly, it is a material that must be used in every building such as residences, industrial plants and hospitals. In order to save manpower, material resources, Improve the construction speed, civilized construction, reduce pollution, use self-leveling self-leveling mortar, the existing cement-based self-leveling mortar: cement as the basic material, sand as the auxiliary material, adding accelerator, water reducing agent, water retention agent Equal composition, the disadvantages of cement-based are: 1. The cement-based self-leveling mortar has slow setting speed and low early strength. It takes 28 days to reach the highest strength, so the construction efficiency is low

2. Cement-based self-leveling mortar, the characteristic of cement has shrinkage, so it is inevitable that large-scale construction will cause cracking, which is a common problem that cannot be solved in the industry, and it is also a bottleneck that hinders the development of cement-based self-leveling

3. Cement-based self-leveling uses cement as the basic material. During the construction process, maintenance is required in order to retain water. Therefore, the construction environment is strictly required, and it is not allowed to be used outdoors, which increases the difficulty of construction and limits the scope of application.

4. Cement-based self-leveling uses cement as the basic material. During the production process, cement consumes a lot of energy and pollutes the environment, which is not conducive to energy conservation and environmental protection.

It has the advantages of high early strength, fast construction speed, environmental protection and energy saving, but its disadvantages are: 1. Gypsum has high water absorption rate and poor wear resistance, so it cannot be used in humid environments, let alone industrial floors, underground garages, etc. And the use of open ground space, which is also the bottleneck problem that has plagued the development of gypsum-based self-leveling for many years

2. The production process of α high-strength gypsum is complicated, the output is low, and the cost is high. Its cost is more than twice that of cement-based self-leveling, so it cannot be recognized by the market

[0004] Due to the needs of the development of environmental protection, especially in order to reduce the pollution of sulfur dioxide to the atmosphere, thermal power plants are now all desulfurized, and a large amount of desulfurized gypsum is produced. Phosphogypsum is produced when phosphoric acid and phosphate fertilizer plants use phosphoric acid to treat ore. A large amount of solid waste residue, citric acid factory produces 1 ton of citric acid to produce 3 tons of waste lemon gypsum slag, salt field waste salt gypsum and production of hydrofluoric acid produce a large amount of fluorine gypsum slag. Due to the limitation of the use of industrial side gypsum in my country, In my country's building materials industry, resources cannot be utilized, and a large amount of industrial side gypsum is accumulated, causing secondary pollution and damage to the environment.

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