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A special mortar for anti-shear synchronous grouting and its preparation method

A synchronous grouting and mortar technology, applied in the field of building materials, can solve problems such as poor quality of fly ash, and achieve the effects of enhanced protection, prevention of floating, good fluidity and water retention

Active Publication Date: 2016-06-15
SHANGHAI URBAN CONSTR MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention uses slag powder instead of fly ash to prepare a special mortar for shear-resistant synchronous grouting, which can improve the shear yield strength of the existing shear-resistant synchronous grouting materials, thereby more effectively controlling the uplift of the tunnel ; It can also solve the problem of poor quality of fly ash or lack of resources, ensure the quality of slurry, and is low in cost and environmentally friendly

Method used

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Embodiment Construction

[0033] A special mortar for shear-resistant synchronous grouting, the preferred components and contents are:

[0034] Sand 1260kg / m 3

[0035] Slag powder 340kg / m 3

[0036] Bentonite 60kg / m 3

[0037] Active stimulant 90kg / m 3

[0038] Ether polycarboxylic acid admixture 3.5kg / m 3

[0039] Water 300kg / m 3 ;

[0040] The sand used is Yangtze River sand with a fineness modulus of 2.2.

[0041] The slag powder used is S95 slag powder from Shanghai Baotian Factory.

[0042] The fineness of the bentonite used is 18%, produced in Zhejiang.

[0043] The active stimulating agent used is calcareous slaked lime powder, (CaO+MgO)% is 68%, and the specific surface area is 420m 2 / kg.

[0044] The model of polycarboxylate admixture used is LC-H.

[0045] The raw materials are prepared by the following process steps to prepare the special mortar for shear-resistant synchronous grouting:

[0046] a. Pass the sand through a sieve with a sieve diameter of 5mm, and remove parti...

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Abstract

The invention discloses a special mortar for shear-resistant synchronous grouting. The material is composed of sand, slag powder, bentonite, active stimulating agent, ether polycarboxylic acid admixture and water, and the contents are respectively: 1070-1280kg / m 3 、300-360kg / m 3 、50-86kg / m 3 、80-120kg / m 3 、2.70-5.00kg / m 3 、300-320kg / m 3 . The special mortar for shear-resistant synchronous grouting of the present invention has good fluidity, filling, water retention and slump retention, and can improve the shear yield strength of existing shear-resistant synchronous grouting materials, thereby being more effective It can accurately control the uplift of the tunnel; it can also solve the problem of poor quality of fly ash or lack of resources, ensure the quality of slurry, and is low in cost and environmentally friendly. It is suitable for synchronous grouting construction of shield tunnels, especially large shield tunnels, in areas where fly ash resources are scarce or of poor quality.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a special mortar for shear-resistant synchronous grouting. Background technique [0002] Synchronous grouting refers to a grouting process that is carried out simultaneously with the tunnel shield propulsion construction and used to fill the gap at the shield tail. The mortar used for grouting is called synchronous grouting special mortar. Synchronous grouting, as an important part of shield tunnel construction, plays an important role in controlling the stability of the tunnel, resisting soil deformation, and improving the water resistance of the tunnel. Synchronous grouting material is the key to the success of grouting, which is related to the cost of grouting, construction control, grouting effect and quality of tunnel. [0003] At present, there are various synchronous grouting materials used at home and abroad. According to whether it is hydrated and consolidated, it ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B111/70
Inventor 李欢欢覃爽何冬明其他发明人请求不公开姓名
Owner SHANGHAI URBAN CONSTR MATERIAL CO LTD
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