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Cement mortar

A cement mortar and slurry technology, which is applied in the field of mortar and cement mortar slurry, can solve problems such as hindering development, unsatisfactory reinforcement effect, pipe plugging, etc., and achieve the effect of no loss in slump

Inactive Publication Date: 2006-03-29
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of grouting equipment and the singleness of grouting materials in China, the grouting grout is currently limited to using thinner, easy-to-flow, and high-slump cement mortar grout to improve the grout pumping efficiency, which hinders the application of this method in this field. development of
The existing compaction grouting technology has the following defects: (1) limited by the pumping capacity of the grouting equipment, if the slump of the grout is large, the reinforcement range will be difficult to control, and if the slump is small, the segregation of the grout will be large and the pipe will be blocked; (2) ) The solid body of the reinforcement slurry shrinks greatly, and the reinforcement effect is not ideal

Method used

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Embodiment Construction

[0009] Below in conjunction with embodiment the present invention is further described, and in embodiment requires grouting material to meet process requirement:

[0010] 1. External admixture

[0011] (1) It can improve the cohesion between cement slurry particles and prevent particle separation;

[0012] (2) It can control the water analysis in the slurry, which is beneficial to the diffusion of the slurry;

[0013] (3) It has a lubricating effect, which can improve the pumping efficiency of the slurry;

[0014] (4) The shrinkage of the cemented body of the slurry is small, which does not affect the strength of the slurry.

[0015] 2. Other materials for grouting construction technology

[0016] Cement: 32.5 ordinary cement

[0017] Fine sand: It is advisable to pass 100% through the No. 8 sieve, and the fine particles smaller than 50μm should not exceed 20%.

[0018] Fly ash: undisturbed ash (common ash).

[0019] Bentonite: 95% pass through a 200-mesh sieve, and the ...

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PUM

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Abstract

A cement slurry used for controllable compacting grouting method is prepared from cement (6-30 wt.%), flyash (21-41), benton (4-6), sand (23-30), water (20-23), polyamine-type high-molecular polymer (0.55-0.75) and additive (0.25-0.35). Its advantages are high resistance to segregation, and high effect on preserving water, lubricating and pumping.

Description

technical field [0001] The invention relates to a mortar in the field of construction engineering materials, in particular to a cement mortar slurry. technical background [0002] The development history of compaction grouting technology can be traced back to the early 19th century. French civil engineer Charles Berigng invented the pressure grouting construction method, injecting the suspended clay slurry and lime slurry mixture into the foundation of the dam. , to repair parts damaged by waves. At the end of the 19th century and the beginning of the 20th century, a mining technical team composed of Germany and Belgium developed a high-pressure grouting pump, improved the grouting process such as the mixing method of grouting materials, and used it in the construction of tunnels and dams, laying a modern foundation The basis of the grouting method. With the development of society, the difficulty of construction increases, the scale expands, and the requirements for grouti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B18/08C04B14/06C04B14/12C04B24/24
CPCC04B2111/00146C04B2111/70C04B28/02Y02W30/91C04B14/06C04B14/104C04B18/08C04B24/28
Inventor 谢彬张冠军黄均龙
Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.
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