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Quick-hardening hih-strength cement anchoring agent

An anchoring agent and cement technology, applied in the field of fast hardening high-strength cement anchoring agent, can solve the problems of high production cost of resin anchoring agent, slow growth of anchoring strength, poor anchoring force, etc.

Inactive Publication Date: 2004-01-07
刘茂平
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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
Ordinary cement mortar anchoring agent, the anchoring strength increases slowly, and shrinkage occurs, which reduces the anchoring force in the later stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0005] Example 1 Sulphoaluminate clinker: 83%, hemihydrate gypsum: 12%, quicklime: 5%;

[0006] Setting time: Initial setting: 3~5min Final setting: 8~10min

[0007] Compressive strength: (Mpa)

[0008] 1h 2h 12h 1d 3d

[0009] 2.40 3.6 54.0 70.0 76.0

example 2

[0010] Example 2 Sulphoaluminate clinker: 89%, hemihydrate gypsum: 8%, quicklime: 3%;

[0011] Setting time: initial setting: 5 ~ 8min final setting: 10 ~ 15min

[0012] Compressive strength: (Mpa)

[0013] 1h 2h 12h 1d 3d

[0014] 2.0 3.0 50.0 72.0 78.0

example 3

[0015] Example 3 Sulphoaluminate clinker: 86%, hemihydrate gypsum: 10%, quicklime: 4%;

[0016] Setting time: Initial setting: 5~8min Final setting: 8~15min

[0017] Compressive strength: (Mpa)

[0018] 1h 2h 12h 1d 3d

[0019] 2.20 3.4 52.0 72.0 76.0

[0020] How to use: Mix the fast-hardening high-strength cement anchoring agent with dry fine sand in a weight ratio of 1:2, and then pack it in a plastic bag. 5Kg per bag. (The moisture content of the dry fine sand should be less than 3%) On-site use a special grouter to inject the anchoring agent and water into the anchor hole.

[0021] Adopt the effect that the present invention obtains:

[0022] 1. With the fast-hardening high-strength cement anchoring agent of the present invention, the anchoring force increases rapidly after adding water. The strength reaches 2.4Mpa in 1 hour, 3.6Mpa in 2 hours, and 54Mpa in 12 hours. The compressive strength can reach more than 70Mpa in one day and more than 75M...

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PUM

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Abstract

The present invention relates to a quick-hardening high-strength cement anchoring agent. It adopts quick-hardening sulfo-aluminite cement clinker as basic gelation material, and adds hemihydrate plaster and quicklime as excitation agent to accelerate hydration process so as to implement quick setting up and can make compression strength and bending strength quickly increase. Said invention has microexpansion property, three-day free expansion rate is greater than 0.3%, and said product solidification speed is quick, its primary solidification is greater than 5 min, and the end solidification is less than 15 min. and its product anchoring strength also can be quickly raised.

Description

1. Technical field [0001] The invention relates to the technical field of anchoring materials such as mine shaft engineering, highway, railway, building installation engineering, tunnel engineering bolting and spraying support, in particular to a fast-hardening high-strength cement anchoring agent. 2. Background technology [0002] Traditional anchoring agents include resin anchoring agents and ordinary cement mortar. The production cost of the resin anchoring agent is high, the anchoring force with the rock formation is poor, and the durability is poor. Ordinary cement mortar anchoring agent, the anchoring strength increases slowly, and there is drying shrinkage, which reduces the anchoring force in the later stage. 3. Contents of the invention [0003] The purpose of the present invention is to provide a fast-hardening high-strength cement anchoring agent that can quickly play an anchoring role, has strong anchoring force, is not easy to shrink, has good durability, is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
Inventor 刘茂平孙学涛任善国张帅
Owner 刘茂平
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