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A cement-based high-performance anchoring agent

An anchoring agent and high-performance technology, applied in the field of cement-based high-performance anchoring agent, can solve the problems of high production cost of resin anchoring agent, slow growth of anchoring strength, and decrease of anchoring force, etc. The effect of anchoring force

Active Publication Date: 2022-01-14
GANSU ZHITONG TECH ENG DETECTION CONSULTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resin anchoring agent has high production cost, poor anchoring force with rock formation, and poor durability
The anchoring strength of ordinary cement mortar anchoring agent increases slowly, and some shrinkage occurs, which reduces the anchoring force in the later stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 A cement-based high-performance anchoring agent is prepared by mixing and stirring the following raw materials in parts by weight (kg): 350 parts of sulfoaluminate cement, 400 parts of ordinary Portland cement, special 5 parts of water reducing agent, 215 parts of sand, 25 parts of low alkali expansion agent, 7 parts of early strength agent.

[0018] Among them: special water reducer refers to the powder obtained by mixing ethylene-vinyl acetate copolymer and powdery polycarboxylate high-performance water reducer in a mass ratio of 2:1 (kg / kg).

[0019] After testing, the anchoring agent has an initial setting of 5~7min and a final setting of 9~13min;

Embodiment 2

[0020] Example 2 A cement-based high-performance anchoring agent is prepared by mixing and stirring the following raw materials in parts by weight (kg): 380 parts of sulfoaluminate cement, 350 parts of ordinary Portland cement, special 7 parts of water reducing agent, 240 parts of sand, 20 parts of low alkali expansion agent, 7 parts of early strength agent.

[0021] Among them: special water reducing agent refers to the powder obtained by mixing ethylene-vinyl acetate copolymer and powdery polycarboxylic acid high-performance water reducing agent in a mass ratio of 1:1 (kg / kg).

[0022] After testing, the anchoring agent has an initial setting of 4~6min and a final setting of 8~11min;

Embodiment 3

[0023] Example 3 A cement-based high-performance anchoring agent is prepared by mixing and stirring the following raw materials in parts by weight (kg): 400 parts of sulfoaluminate cement, 300 parts of ordinary Portland cement, special 5 parts of water reducing agent, 275 parts of sand, 18 parts of low alkali expansion agent, and 5 parts of early strength agent.

[0024] Among them: special water reducer refers to the powder obtained by mixing ethylene-vinyl acetate copolymer and powdery polycarboxylate high-performance water reducer according to the mass ratio (kg / kg) of 1.5:1.

[0025] After testing, the anchoring agent has an initial setting of 3~4min and a final setting of 6~8min;

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Abstract

The invention relates to a cement-based high-performance anchoring agent. The anchoring agent is uniformly prepared by mixing and stirring the following raw materials in parts by weight: 350-440 parts of sulphoaluminate cement, 250-400 parts of ordinary Portland cement, 5~10 parts of special water reducing agent, 170~285 parts of sand, 15~25 parts of low alkali expansion agent, 3~7 parts of early strength agent. The invention has strong anchoring force, is not easy to dry shrinkage, has good durability, low cost, and is easy to realize industrialized production.

Description

technical field [0001] The invention relates to the technical fields of anchoring materials such as mine shaft engineering, highways, railways, building installation engineering, and tunnel engineering, and particularly relates to a cement-based high-performance anchoring agent. Background technique [0002] The traditional anchoring agents are resin anchoring agent and ordinary cement mortar. The resin anchoring agent has high production cost, poor anchoring force with the rock formation, and poor durability. The anchoring strength of ordinary cement mortar anchoring agent increases slowly, and some parts also experience dry shrinkage, which reduces the anchoring force in the later stage. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a cement-based high-performance anchoring agent with strong anchoring force, not easy to dry shrinkage and good durability. [0004] In order to solve the above problems, a cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B7/02C04B2103/302C04B14/06C04B2103/14
Inventor 牛敏敏冯月娥张钊李彦江朱玉红张会平
Owner GANSU ZHITONG TECH ENG DETECTION CONSULTING CO LTD
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