High-strength gypsum-based self-leveling mortar and preparation method thereof

A self-leveling mortar and gypsum-based technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high cost and high strength, and achieve enhanced mechanical strength, high strength, and reduced hydration The effect of exothermic

Pending Publication Date: 2022-08-02
重庆杰博思石膏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the main purpose of the present invention is to provide a high-strength gypsum-based self-leveling mortar, aiming at solving the technical problem of high strength but high cost of the existing gypsum self-leveling mortar; meanwhile, the present invention also provides the high-strength gypsum-based self-leveling mortar Preparation method of self-leveling mortar

Method used

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  • High-strength gypsum-based self-leveling mortar and preparation method thereof
  • High-strength gypsum-based self-leveling mortar and preparation method thereof
  • High-strength gypsum-based self-leveling mortar and preparation method thereof

Examples

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Embodiment 1

[0025] A high-strength gypsum-based self-leveling mortar and a preparation method thereof, comprising the following raw materials:

[0026] Including plaster of Paris 100kg, water 45kg, cement 10kg, silica fume 7kg, fly ash 3kg, sand aggregate 30kg, water retention agent 0.1kg, retarder 0.15kg, water reducing agent 0.35kg, defoamer 0.1kg, rubber powder 0.2kg.

[0027] Among them, the building gypsum is desulfurized building gypsum with a specific surface area of ​​350m 2 / kg, the particle size is 100μm, the cement is 42.5 grade fast-hardening ordinary Portland cement (P O 42.5R), the water is ordinary tap water, and the specific surface area of ​​silica fume is 25000m 2 / kg, in which the fly ash is grade I ash, and the ore sand is a mixture of large particle size ore with a fineness of 120 meshes and small particle size ore sand with a fineness of 35 meshes in a mass ratio of 2:1, wherein the water-retaining agent is hydroxypropyl methyl cellulose ether, the viscosity is 400...

Embodiment 2

[0032] A high-strength gypsum-based self-leveling mortar and a preparation method thereof, comprising the following raw materials:

[0033] Including plaster of Paris 100kg, water 38kg, cement 6kg, silica fume 5kg, fly ash 6kg, sand aggregate 15kg, water retention agent 0.07kg, retarder 0.1kg, water reducing agent 0.25kg, defoamer 0.05kg, rubber powder 0.3kg.

[0034] Among them, the building gypsum is desulfurized building gypsum with a specific surface area of ​​400m 2 / kg, the particle size is 75μm, the cement is 42.5 grade fast-hardening ordinary Portland cement (P O 42.5R), the water is ordinary tap water, and the specific surface area of ​​silica fume is 20000m 2 / kg, in which the fly ash is grade I ash, and the ore sand is a mixture of large particle size ore with a fineness of 140 mesh and a small particle size ore with a fineness of 45 mesh in a mass ratio of 2:1, wherein the water-retaining agent is hydroxypropyl methyl cellulose ether, the viscosity is 500mpa s, t...

Embodiment 3

[0039] A high-strength gypsum-based self-leveling mortar and a preparation method thereof, comprising the following raw materials:

[0040] Including plaster of Paris 100kg, water 30kg, cement 3kg, silica fume 3kg, fly ash 10kg, sand aggregate 5kg, water retention agent 0.05kg, retarder 0.05kg, water reducing agent 0.2kg, defoamer 0.05kg, rubber powder 0.2kg.

[0041] Among them, the building gypsum is desulfurized building gypsum with a specific surface area of ​​300m 2 / kg, the particle size is 150μm; the cement is 42.5 grade fast-hardening ordinary Portland cement (P O 42.5R), the water is ordinary tap water, and the specific surface area of ​​silica fume is 15000m 2 / kg, in which the fly ash is grade I ash, and the ore sand is a mixture of large particle size ore with a fineness of 100 meshes and a small particle size ore with a fineness of 30 meshes in a mass ratio of 2:1, wherein the water-retaining agent is hydroxypropyl methyl cellulose ether, the viscosity is 450mpa...

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Abstract

The invention discloses high-strength gypsum-based self-leveling mortar which comprises building gypsum, water, cement, silica fume, fly ash, sand aggregate, a water-retaining agent, a retarder, a water reducing agent, a defoaming agent and rubber powder, and the sand aggregate is ore sand and/or stone powder. The invention also discloses a preparation method of the high-strength gypsum-based self-leveling mortar. According to the high-strength gypsum-based self-leveling mortar provided by the invention, the coal ash or the silica fume is subjected to alkaline excitation on the basis of compounding a small amount of cement in the building gypsum, and the coal ash and/or the silica fume are/is adopted, so that the hydration heat release of the cement can be reduced, and the compactness of a hardened body is enhanced; the fluidity, cohesiveness and water-retaining property of the mortar are improved by using the glass sphere form of the fly ash and the co-doped sand aggregate, and finally the chemical admixture with good compatibility is supplemented for modification treatment, so that the physical and mechanical properties of the cementing material are effectively improved, resources are reasonably utilized on the premise that the gypsum-based self-leveling mortar has relatively high strength, and the gypsum-based self-leveling mortar is suitable for industrial production. The cost of the gypsum-based self-leveling mortar is reduced.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials and building materials, and particularly relates to a high-strength gypsum-based self-leveling mortar and a preparation method thereof. Background technique [0002] At this stage, my country's industrial by-product gypsum has a large overall discharge, and its utilization rate is only 40% low. A large amount of industrial by-product gypsum, long-term storage occupies a large amount of land resources, and causes ecological and environmental damage. The resource utilization of industrial by-product gypsum is the requirement of my country's strategic development. [0003] Self-leveling mortar is a ground self-leveling material composed of inorganic cementitious material or organic material as the base material, which is compounded with aggregate and admixture. It has good fluidity and can accurately level the ground in a large area in a short time, which is beneficial to Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/62C04B2201/50C04B18/12C04B18/146C04B18/08C04B7/00C04B24/383C04B24/14C04B24/32C04B24/26C04B2103/302Y02W30/91
Inventor 彭家惠赵敏瞿金东刘先锋范璞玥
Owner 重庆杰博思石膏有限公司
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