Self-leveling mortar material with phosphogypsum as filling material, and preparation method thereof

A technology for self-leveling mortar and phosphogypsum, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as the inability to meet the demand of phosphogypsum, and achieve the advantages of simple process, cost saving and energy consumption reduction. Effect

Inactive Publication Date: 2012-10-17
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have opened the way for the utilization of phosphogypsum, but cannot meet the current urgent need to deal with phosphogypsum
It has not been reported that non-calcined phosphogypsum replaces heavy calcium powder and light calcium powder as fillers for self-leveling mortar

Method used

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  • Self-leveling mortar material with phosphogypsum as filling material, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A self-leveling mortar material with phosphogypsum as filler, the raw material components and mass percentage composition include: 9.6% of rapid hardening 42.5 sulfoaluminate cement, 6% of 42.5 Portland cement, 38% of phosphogypsum, 30-50 mesh Quartz sand 16.6%, 40-70 mesh quartz sand 16.6%, polycarboxylate water reducer, defoamer, borax 0.36%, 0.02%, 0.07%, water consumption 12.75%.

[0029] Results: The initial fluidity was 144mm, the 20-minute fluidity was 137mm, the 1-day compressive strength and flexural strength were 8MPa and 2.7MPa respectively, and the 28-day compressive strength and flexural strength were 24.4MPa and 7.6MPa respectively. The strength is 1.8MPa, the wear amount is 0.27g, and the dimensional change rate in 28 days is -0.05%.

Embodiment 2

[0031] A self-leveling mortar material with phosphogypsum as a filler, the raw material components and mass percentages include: rapid hardening 42.5 sulfoaluminate cement 10%, 42.5 Portland cement 6%, phosphogypsum 41%, 30-50 mesh Quartz sand 15%, 40-70 mesh quartz sand 15%, polycarboxylate superplasticizer, defoamer, borax 0.35%, 0.02%, 0.07%, water consumption 12.56%.

[0032] Results: The initial fluidity was 138mm, the fluidity in 20 minutes was 138mm, the 1-day compressive strength and flexural strength were 9.5MPa and 3.0MPa respectively, and the 28-day compressive strength and flexural strength were 26.3MPa and 8.6MPa respectively. The joint strength is 1.6MPa, the wear amount is 0.31g, and the dimensional change rate in 28 days is -0.07%.

Embodiment 3

[0034] A self-leveling mortar material with phosphogypsum as filler, the raw material components and mass percentage composition include: 9.7% of rapid hardening 42.5 sulfoaluminate cement, 6% of 42.5 Portland cement, 46.7% of phosphogypsum, 30-50 mesh Quartz sand 12.3%, 40-70 mesh quartz sand 12.3%, polycarboxylate water reducer, defoamer, borax 0.35%, 0.02%, 0.07%, water consumption 12.56%.

[0035] Results: The initial fluidity was 143mm, the 20-minute fluidity was 142mm, the 1-day compressive strength and flexural strength were 8.8MPa and 2.8MPa respectively, and the 28-day compressive strength and flexural strength were 26.5MPa and 9.2MPa respectively. The joint strength is 1.6MPa, the wear amount is 0.36g, and the dimensional change rate in 28 days is -0.11%.

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Abstract

The invention discloses a self-leveling mortar material with phosphogypsum as a filling material. The mortar material is characterized in that: the mortar material is composed of raw materials of, by mass: 35%-60% of phosphogypsum, 13%-20% of cement, 17%-40% of sand, 0.26%-0.50% of a water reducer, 0.01%-0.024% of an antifoaming agent, 0.035%-0.3% of a retarding agent, and 4%-14% of water. The preparation method of the mortar comprises the steps that: the raw materials are fetched; phosphogypsum, cement, and sand are mixed for 1-3min, such that a dry mixture is obtained; the water reducer, the antifoaming agent, and the retarding agent are respectively mixed with part of the water, and the mixtures are mixed into the dry mixture; the rest of the water is added into the mixture, and the mixture is well mixed, such that the self-leveling mortar material is obtained. According to the invention, a waste product phosphogypsum is adopted as the filling material, such that industrial waste residue is consumed, pollution is reduced, and natural resource is saved. The prepared self-leveling mortar is advantaged in good performance and high practicality.

Description

technical field [0001] The invention belongs to self-leveling mortar with waste phosphogypsum as a main raw material and a preparation method thereof, and relates to a self-leveling mortar material with phosphogypsum as a filler and a preparation method thereof. The self-leveling mortar material of the invention is suitable for use as ground materials of buildings. Background technique [0002] Self-leveling mortar is a new type of ground material for buildings, especially suitable for leveling the floors of industrial plants and home decoration rooms. The self-leveling mortar material has the characteristics of good leveling, high early strength, easy laying, fast construction speed, and short construction period. It is an ideal material for fine leveling of the building ground. As a surface floor, and by adding inorganic pigments and painting water-based resin floor coatings, it can also form a colorful floor with decorative effects. It is a building material product with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/04
CPCY02W30/91
Inventor 严云杨林胡志华周科李正银
Owner SOUTHWEAT UNIV OF SCI & TECH
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