Gypsum self-leveling mortar for floor heating backfilling and preparation method of gypsum self-leveling mortar

A self-leveling mortar and gypsum technology, applied in the field of building materials, can solve the problems of not conforming to the green and low energy consumption development concept, requiring mechanical equipment and site support, unfavorable promotion and utilization, etc. , The effect of good wear resistance

Pending Publication Date: 2021-05-28
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost is more than 150,000/ton, and the cost is very high in the process of large-scale construction, which is not conducive to comprehensive promotion and utilization, and there is a problem of poor wear resistance; the Chinese patent application number 201910354143.5 discloses a solid waste heat conduction self-flowing Flat mortar and its preparation method and application, use strongly acidic phosphogypsum and alkaline solid waste steel slag as main materials, carry out acid-base neutralization, and obtain a relatively

Method used

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  • Gypsum self-leveling mortar for floor heating backfilling and preparation method of gypsum self-leveling mortar
  • Gypsum self-leveling mortar for floor heating backfilling and preparation method of gypsum self-leveling mortar
  • Gypsum self-leveling mortar for floor heating backfilling and preparation method of gypsum self-leveling mortar

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A gypsum self-leveling mortar used for floor heating backfill, comprising the following components in parts by weight:

[0030] Phosphogypsum powder (β-hemihydrate gypsum) 420 parts, electric furnace air-cooled steel slag 110 parts, cement (PⅡ52.5 cement) 60 parts, graphite powder (600 mesh) 24 parts, calcium oxide 8 parts, aluminum magnesium silicate 8 parts , 0.5 parts of gypsum retarder, 0.7 parts of polycarboxylate superplasticizer, 10 parts of VAE redispersible rubber powder, 3 parts of defoamer, and 200 parts of water.

[0031] Preparation method of gypsum self-leveling mortar:

[0032] Put gypsum powder, cement, graphite powder, calcium oxide, aluminum magnesium silicate, gypsum retarder, water reducer, redispersible latex powder and defoamer into the mortar mixer, and mix at a low speed of 65r / min 2-5min, then add steel slag and water, continue mixing and stirring at 125r / min high-speed speed for 2-5min, that is.

Embodiment 2

[0034] A gypsum self-leveling mortar used for floor heating backfill, comprising the following components in parts by weight:

[0035] Phosphogypsum powder (β-hemihydrate gypsum) 450 parts, electric furnace air-cooled steel slag 120 parts, cement (PⅡ52.5 cement) 50 parts, graphite powder (600 mesh) 26 parts, calcium oxide 12 parts, aluminum magnesium silicate 6 parts , 0.6 parts of gypsum retarder, 0.6 parts of polycarboxylate superplasticizer, 11 parts of VAE redispersible rubber powder, 3.5 parts of defoamer, and 210 parts of water.

[0036] Preparation method of gypsum self-leveling mortar:

[0037] Put gypsum powder, cement, graphite powder, calcium oxide, aluminum magnesium silicate, gypsum retarder, water reducer, redispersible latex powder and defoamer into the mortar mixer, and mix at a low speed of 65r / min 2-5min, then add steel slag and water, continue mixing and stirring at 125r / min high-speed speed for 2-5min, that is.

Embodiment 3

[0039] A gypsum self-leveling mortar used for floor heating backfill, comprising the following components in parts by weight:

[0040] Phosphogypsum powder (β-hemihydrate gypsum) 430 parts, electric furnace air-cooled steel slag 125 parts, cement (PⅡ52.5 cement) 40 parts, graphite powder (600 mesh) 27 parts, calcium oxide 11 parts, aluminum magnesium silicate 9 parts , 0.6 parts of gypsum retarder, 0.6 parts of polycarboxylate superplasticizer, 12 parts of VAE redispersible rubber powder, 3.5 parts of defoamer, and 215 parts of water.

[0041] Preparation method of gypsum self-leveling mortar:

[0042] Put gypsum powder, cement, graphite powder, calcium oxide, aluminum magnesium silicate, gypsum retarder, water reducer, redispersible latex powder and defoamer into the mortar mixer, and mix at a low speed of 65r / min 2-5min, then add steel slag and water, continue mixing and stirring at 125r / min high-speed speed for 2-5min, that is.

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Abstract

The invention relates to gypsum self-leveling mortar for floor heating backfilling. The gypsum self-leveling mortar is prepared from the following components in parts by weight: 400 to 460 parts of gypsum powder, 100 to 140 parts of industrial solid waste residues, 30 to 70 parts of cement, 20 to 35 parts of graphite powder, 5 to 15 parts of calcium oxide, 3 to 15 parts of magnesium aluminum silicate, 9 to 15 parts of redispersible latex powder, 2 to 5 parts of a de-foaming agent, 0.5 to 1 part of a gypsum retarder, 0.5 to 1 part of a water reducing agent and 160 to 220 parts of water. According to the gypsum self-leveling mortar, the industrial waste residues are adopted as aggregates in gypsum self-leveling, the use of sand in the self-leveling mortar is reduced, the strength and abrasion resistance of the gypsum self-leveling mortar are effectively improved, and the gypsum self-leveling mortar is low in cost and stable in quality, has good abrasion resistance, compressive strength and heat-conducting property, is suitable for backfilling of different types of floor heating systems, preparation and construction are simple, and energy consumption is low.

Description

technical field [0001] The invention relates to a gypsum self-leveling mortar used for floor heating backfill and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the rapid development of my country's phosphate fertilizer, chlor-alkali, calcium desulfurization and other industries, the output of various industrial by-products of gypsum is huge. Low, leading to increasingly serious environmental pollution and safety problems caused by long-term stockpiling. However, industrial by-product gypsum has disadvantages such as high impurities and unstable components, which leads to low enthusiasm for replacing natural gypsum with industrial by-product gypsum for product production, and the technology is relatively lagging behind. Efficient, environmentally friendly, and sustainable utilization of industrial by-product gypsum, making it a resource, and producing new gypsum-based materials with high economic added...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/00017C04B2201/32C04B2201/50C04B7/02C04B18/141C04B18/142C04B14/024C04B22/064C04B22/08C04B2103/0057C04B2103/50C04B2103/22C04B2103/302
Inventor 李东旭廖大龙贺诚焦嘉伟
Owner NANJING UNIV OF TECH
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