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Aluminate cement-based jet mortar and preparation method thereof

A technology of aluminate cement and Portland cement, which is applied in the field of mining, can solve the problems that the rapid setting performance of spray mortar cannot meet the construction requirements, and is easy to shrink and crack, and achieves fast setting and hardening speed, high early strength and low production cost. low effect

Active Publication Date: 2022-01-25
安徽路源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the current sprayed mortar, the present invention has carried out research and development of aluminate cement-based sprayed mortar. Meet the construction requirements and easy to shrink and crack

Method used

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  • Aluminate cement-based jet mortar and preparation method thereof
  • Aluminate cement-based jet mortar and preparation method thereof
  • Aluminate cement-based jet mortar and preparation method thereof

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preparation example Construction

[0042] The preparation method of aluminate cement-based spray mortar of the present invention comprises the following steps:

[0043] In the first step, add water reducer, slaked lime, sodium carbonate, sodium sulfate, and redispersible latex powder into the mixer in proportion and mix evenly, and set the setting time according to the national standard GB 8076-2008 "Concrete Admixture" After testing, the composite admixture is obtained after passing the test. The preparation process is as follows: figure 1 shown;

[0044] In the second step, add aluminate cement, Portland cement, slag powder, and gypsum into the mixer in proportion, and stir until uniform. Refer to the national standard GB 8076-2008 "Concrete Admixtures" to test the setting time and compressive strength , after passing the test, the gelled material is obtained. The preparation process is as follows: figure 2 shown;

[0045] In the third step, the composite admixture obtained in the first step, the cementitio...

Embodiment 1

[0047] The aluminate cement-based spray mortar of this embodiment is prepared as follows:

[0048] In the first step, add 3000g of water reducer, 2000g of slaked lime, 2000g of sodium carbonate, 2000g of sodium bicarbonate, and 1000g of redispersible latex powder into the mixer and mix evenly. Refer to the national standard GB

[0049] 8076-2008 "Concrete Admixture" is tested, and the composite admixture is obtained after passing the test;

[0050] In the second step, mix 3000g of aluminate cement, 3000g of Portland cement, 2000g of slag powder, and 2000g of gypsum in a mixer until they are evenly mixed. Test with reference to the national standard GB 8076-2008 "Concrete Admixture", and pass the test Get gelling material;

[0051] In the third step, the composite admixture obtained in the first step, the cementitious material obtained in the second step, sand and water are proportioned in parts by weight: cementitious material: composite admixture: sand: water=1: 0.045∶2.5∶0...

Embodiment 2

[0053] The aluminate cement-based spray mortar of this embodiment is prepared as follows:

[0054] In the first step, add 2500g of water reducer, 3000g of slaked lime, 1000g of sodium carbonate, 3000g of sodium bicarbonate, and 500g of redispersible latex powder into the mixer and mix evenly. Refer to the national standard GB 8076-2008 "Concrete Admixture" Testing is carried out, and the composite admixture is obtained after passing the testing;

[0055] In the second step, mix 2000g of aluminate cement, 4000g of Portland cement, 1000g of slag powder, and 3000g of gypsum in a mixer until they are evenly mixed. Test with reference to the national standard GB 8076-2008 "Concrete Admixture" and pass the test Get gelling material;

[0056] In the third step, the composite admixture obtained in the first step, the cementitious material obtained in the second step, sand and water are proportioned in parts by weight: cementitious material: composite admixture: sand: water=1: 0.04∶1...

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Abstract

The invention belongs to the technical field of mining, and particularly relates to aluminate cement-based jet mortar and a preparation method thereof. The jet mortar is composed of a binding material, a composite additive, sand and water according to the weight ratio of 1: (0.03-0.06): (1.5-3.0): (0.40-0.50). The cementing material is prepared from the following raw materials in parts by weight: 20-40 parts of aluminate cement, 20-40 parts of Portland cement, 10-30 parts of slag powder and 10-30 parts of gypsum; the composite admixture is prepared from the following raw materials in parts by weight: 20-40 parts of a water reducing agent, 10-30 parts of slaked lime, 10-30 parts of sodium carbonate, 10-30 parts of anhydrous sodium sulphate and 5-10 parts of redispersible latex powder. The jet mortar has the characteristics of high setting and hardening speed, high early strength, micro-expansion and the like, and is suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to an aluminate cement-based spray mortar and a preparation method thereof. Background technique [0002] In construction projects such as coal mine construction, road and railway tunnel excavation, it is necessary to use shotcrete (or shotcrete) to quickly reinforce the surrounding rock. At present, Portland cement is the main cementing material of commonly used jetted mortar, and the following problems often exist in actual construction: First, the adaptability of Portland cement and quick-setting agent, general-purpose Portland cement (belonging to silicate Portland cement) including Portland cement, ordinary Portland cement, composite Portland cement, fly ash Portland cement, slag Portland cement, etc., different types of Portland cement and accelerator There are often problems of adaptability. If the adaptability is not good, it will cause problems such as longer in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/00017C04B2111/00155C04B2201/50C04B2201/05C04B7/02C04B7/32C04B22/064C04B22/10C04B22/147C04B18/141C04B14/06C04B2103/302C04B2103/0057Y02W30/91
Inventor 陈青陈清
Owner 安徽路源环保科技有限公司
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