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A kind of early-strength freeze-thaw anti-spray material and preparation method thereof

A technology of anti-freezing and thawing, spraying equipment, applied in the field of building materials

Active Publication Date: 2020-10-30
上海宝冶工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A total of 15 tracks of the snowmobile and sled center venue project have been certified by international individual organizations (International Snowmobile and Sled Federation IBSF and International Bobsled Federation FIL). These 15 tracks are all abroad, and no domestic enterprises or units have participated in it. There is no experience to learn from the design and construction of such projects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First weigh according to mass percentage: 30% of cementitious material, 35% of natural graded medium sand, 19.5% of stone, 15% of redispersible latex powder, 0.3% of polycarboxylate superplasticizer, 0.1% of polypropylene short fiber and 0.1% polymer admixture, mix the above raw materials in a gravity-free mixing mixer for 8 minutes to obtain spray dry powder; then weigh 100 parts of the above spray dry powder, 5 parts of hardening accelerator and 10 parts of water according to the parts by weight, and set aside; , The main component of the accelerator is alumina.

Embodiment 2

[0026] First weigh according to mass percentage: 25% of cementitious material, 50% of natural graded medium sand, 15% of stone, 9.4% of redispersible latex powder, 0.3% of polycarboxylate superplasticizer, 0.1% of polypropylene short fiber and 0.2% polymer admixture, mix the above raw materials in a gravity-free mixing mixer for 8 minutes to obtain spray dry powder; then weigh 100 parts of the above spray dry powder, 4 parts of hardening accelerator and 11 parts of water according to the parts by weight, and set aside; , The main component of the accelerator is alumina.

Embodiment 3

[0028] First weigh according to mass percentage: 35% of cementitious material, 35% of natural graded medium sand, 20% of stone, 9.87% of redispersible latex powder, 0.1% of polycarboxylate superplasticizer, 0.02% of polypropylene short fiber and 0.01% polymer admixture, mix the above raw materials in a gravity-free mixing mixer for 12 minutes to obtain spray dry powder; then weigh 100 parts of the above spray dry powder, 4 parts of hardening accelerator and 12 parts of water according to parts by weight, and spray dry powder After mixing with water, stir evenly, and transport it to the spraying equipment. The hardening accelerator is transported to the spray gun of the above-mentioned spraying equipment by air pressure for uniform spraying. The spraying rate is 50-80L / min, and the thickness of one-time spraying is 50-100mm. , to get early strong anti-freezing and thawing spray materials.

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Abstract

The invention discloses a high-early-strength freeze-thaw resistant spraying material and a preparation method thereof. The high-early-strength freeze-thaw resistant spraying material is prepared fromthe following components in parts by weight: 100 parts of spraying dry powder, 3-5 parts of hardening accelerator and 10-15 parts of water, wherein the hardening accelerator adopts aluminium oxide asa main component; and the spraying dry powder is prepared from the following components in percentage by mass: 25%-35% of a cementing material, 35%-50% of natural grading medium sand, 15%-20% of stone, 5%-15% of redispersible latex powder, 0.1%-0.3% of polycarboxylate superplasticizer, 0.02%-0.1% of polypropylene staple fiber, and 0.01%-0.2% of polymer additive. The spraying material has high workability, stable performance, sag resistance and trowelling performance, and has rapid hardening and early strength effects after spraying construction, the preparation process is simple, the construction is convenient and efficient, and the spraying material is specially used for building construction materials of snowmobiles, sleds and racing tracks.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an early-strength anti-freeze-thaw spray material and a preparation method thereof. Background technique [0002] A total of 15 tracks of the snowmobile and sled center venue project have been certified by international individual organizations (International Snowmobile and Sled Federation IBSF and International Toboggan Federation FIL). These 15 tracks are all abroad, and no domestic enterprises or units have participated in it. There is no experience to learn from in the design and construction of such projects. The construction of the track is difficult and requires high precision, which is a difficult point in the construction of venues for the previous Winter Olympics. Among them, the use of sprayed concrete is: the construction method of spraying pouring and spraying materials with a pressure spray gun, which is often used for pouring tunnel linings,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/27
CPCC04B28/04C04B2111/00103C04B2111/00155C04B2111/00293C04B2111/00482C04B2111/0075C04B2111/20C04B2111/27C04B2201/50C04B18/141C04B18/146C04B14/06C04B14/02C04B16/0633C04B22/06C04B18/26C04B24/383C04B24/38C04B2103/0057C04B2103/302C04B2103/50
Inventor 圣长波魏金龙潘产金刘晓黄嘉乐马冰洋杨芸
Owner 上海宝冶工程技术有限公司
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