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Modified gypsum-based self-leveling mortar and preparation and application thereof

A self-leveling mortar, gypsum-based technology, applied in the field of mortar, can solve problems such as poor water resistance, and achieve the effects of improving fluidity and stability, and improving construction and performance.

Inactive Publication Date: 2016-06-08
上海每天生态科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, gypsum as the main gel material, because it is an air-hardening material, has a large gap with cement in terms of strength and water resistance. Therefore, the strength of gypsum-based self-leveling is lower than that of cement-based self-leveling, and its water resistance is poor. Therefore, those skilled in the art are committed to developing a related technology of using industrial by-product β gypsum (building gypsum) to prepare gypsum-based self-leveling, so as to improve the strength and water resistance of gypsum-based self-leveling mortar.

Method used

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  • Modified gypsum-based self-leveling mortar and preparation and application thereof
  • Modified gypsum-based self-leveling mortar and preparation and application thereof
  • Modified gypsum-based self-leveling mortar and preparation and application thereof

Examples

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preparation example Construction

[0072] The preparation method of building gypsum in Examples 1-4 is as follows: phosphogypsum is pre-mixed with desulfurized gypsum in a mass ratio of 1:1 after appropriate pretreatment to neutrality (pH ≈ 7), and the tail steam generated by power generation of the power plant mixes the gypsum at 75%. After drying at °C, calcined at 150 °C for 2 hours; then ground to 200 mesh; aged for 7 days after cooling.

[0073] The manufacturing method and testing method of the test pieces in the examples were carried out in accordance with the relevant regulations of the building materials industry standard JC / T1023-2007 gypsum-based self-leveling mortar. The softening coefficient is the ratio of the compressive strength after immersion in water for 48 hours to the absolute dry compressive strength before immersion in water.

Embodiment 1

[0075] The sand ratio R of the modified gypsum-based self-leveling mortar medium-grade sand is 40%, and the water-cement ratio is 0.38;

[0076] The main components of modified gypsum are: building gypsum 65%, slag powder 20%, steel slag powder 2%, cement 8%, heavy calcium powder 5%;

[0077] Building admixtures and their percentage per thousand to the quality of the main materials are: retarder 2‰, water reducing agent 2‰, defoamer 0.3‰, cellulose ether 0.5‰, redispersible latex powder 5‰;

[0078] The performance is as follows:

[0079]

Embodiment 2

[0081] The sand ratio R of the modified gypsum-based self-leveling mortar medium-grade sand is 40%, and the water-cement ratio is 0.36;

[0082] The main components of modified gypsum are: building gypsum 45%, slag powder 12%, steel slag powder 20%, cement 18%, heavy calcium powder 5%;

[0083] The building admixtures and their percentage per thousand to the quality of the main materials are: retarder 1.7‰, water reducing agent 4‰, defoamer 2‰, cellulose ether 2‰, redispersible latex powder 15‰;

[0084] The performance is as follows:

[0085]

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Abstract

The invention discloses modified gypsum-based self-leveling mortar and preparation and application thereof. The mortar can be taken as a self-leveling mortar material for use in indoor ground leveling, and is prepared from modified gypsum, graded sand and a proper quantity of building additives. A method of adding a proper quantity of inorganic materials such as ground steel slag and ground slag and relevant additives is adopted, so that the water consumption of the modified gypsum is lowered, the density of a material is increased, and the water resistance and the mechanical property of the material are improved while high bonding performance of the gypsum-based material is kept. Scarce alpha gypsum or natural anhydrite is not adopted, raw materials are stable and reliable in supply, and more superior cost performance is achieved; wastes such as gypsum of power plants, ardealite, ground steel slag and ground slag are made full use for making a cementing material, so that general recycling of waste resources is realized, environmental pollution is lowered, and meanwhile a tremendous economic benefit is achieved.

Description

technical field [0001] The invention belongs to the technical field of mortar, and relates to a modified gypsum-based self-leveling mortar and its preparation and application. Background technique [0002] The traditional artificial floor construction is to chisel the concrete floor and then carry out manual leveling construction. With the continuous increase of labor costs, self-leveling mortar has gradually become competitive in terms of economy. Self-leveling mortar is a new type of ground mortar material. It is automatically leveled and quickly dried by the characteristics of liquid flow. Compared with the artificial ground leveling process, it saves materials and labor and shortens the construction period. As a ground leveling material that can be leveled accurately, self-leveling mortar is especially suitable for rapid leveling of large areas such as large shopping malls, supermarkets, and underground parking lots. This kind of self-leveling mortar is divided into two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B11/26C04B11/02C04B111/62
CPCC04B11/02C04B11/26C04B11/264C04B28/147C04B2111/62C04B2201/50C04B18/141C04B18/142C04B7/02C04B14/28C04B14/042C04B2103/22C04B2103/302C04B2103/50C04B24/383C04B2103/0057
Inventor 李涛方爱华程云
Owner 上海每天生态科技发展有限公司
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