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Grouting method of nontoxic low-viscosity high-strength epoxy chemical grouting material

A chemical grouting, epoxy-based technology, used in infrastructure engineering, water conservancy engineering, artificial islands, etc., can solve the problem that the initial viscosity is difficult to reach the ideal state, and achieve excellent grouting, small shrinkage, and simple ratio. Effect

Active Publication Date: 2017-01-04
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glycidyl ether is used as a diluent at the expense of the mechanical properties of grouting materials. Although it solves the environmental protection problem, it is difficult to achieve the ideal initial viscosity due to the limitation of its dosage.

Method used

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  • Grouting method of nontoxic low-viscosity high-strength epoxy chemical grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A grouting method of a non-toxic, low-viscosity, high-strength epoxy-based chemical grouting material according to the present invention comprises the following steps:

[0047] 1) Clean the dirt on the surface of the crack to make the crack penetrate;

[0048] 2) Arrange the grouting holes along the direction of the cracks, and bury one-way water-stop grouting needles in the grouting holes;

[0049] 3) The surface of the crack is sealed. For non-penetrating concrete surface cracks, it is necessary to leave vent holes at the highest point of crack extension;

[0050] 4) Prepare non-toxic, low-viscosity, high-strength epoxy-based chemical grouting grout;

[0051] 5) Connect the piston-type grouting pump to grout the grout prepared in step 4. Start from the bottom grouting hole, and grout at low pressure successively from bottom to top. If the inside has been filled, the grouting can be ended, or the grout flowing out of the vent hole can also be considered as full grout...

Embodiment 2

[0055] On the basis of Example 1, when laying out the grouting holes described in step 2, the concrete cracks should be drilled across the cracks as much as possible, and for the structural joints that can accurately grasp the direction of the cracks, the gap drilling should be used, and the distance between the grouting holes depends on the width of the cracks. Generally, 30cm±10cm is used, and a one-way water-stop grouting needle is buried in the grouting hole.

[0056] The cross-fracture drilling is arranged on the principle of the shallowest hole depth and the most conducive to the spread of slurry. It can be arranged on the same side or both sides of the crack according to the occurrence of the crack, and the bottom should be densely spaced, regardless of the same side or both sides , the hole position intersecting with the crack surface must be distributed in a plum blossom pattern on the crack surface, the distance between the drilled holes across the crack should be wit...

Embodiment 3

[0059] On the basis of Example 1, the sealing treatment of the surface of the crack described in step 3 can be filled with slotted epoxy mortar, or can be sealed by surface sticking.

[0060] The operation steps of slotted epoxy mortar filling method are as follows:

[0061] 1) Dig a U-shaped groove along the direction of the crack, the groove width is 5cm, the groove depth is 3cm, and extend more than 10cm to both ends of the crack;

[0062] 2) Use high-pressure clean air to clean the grooved part, and use a wire brush to remove loose particles;

[0063] 3) Brush the epoxy-based interface agent on the inner surface of the clean tank to ensure the bonding force between the filling material and the concrete;

[0064] 4) After the interface agent reaches the initial setting state (touch the surface with your fingers without leaving marks), fill the prepared epoxy cement material evenly into the groove, and do a good job of compacting and smoothing the surface.

[0065] The sur...

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Abstract

The invention discloses a grouting method of a nontoxic low-viscosity high-strength epoxy chemical grouting material. The grouting method comprises the following steps: (1) clearing the crack surface dirt to obtain a communicated crack; (2) arranging grouting holes; (3) closing the crack surface; (4) preparing a nontoxic low-viscosity high-strength epoxy chemical grouting slurry; (5) sequentially performing low-pressure grouting in holes one by one from bottom to top until all grouting holes are full; and (6) cleaning the grouting instrument by acetone. The method disclosed by the invention has good applicability to the stressed cracks of structural concrete, temperature cracks of mass concrete and differential settlement cracks of cavity lining concrete; and moreover, the components of the grouting material are nontoxic, the initial viscosity is low, the strength of the cured product is high, and the curing time is adjustable.

Description

[0001] Technical field: [0002] The invention relates to a grouting method for a grouting material, in particular to a non-toxic, low-viscosity, high-strength epoxy-based chemical grouting material. [0003] Background technique: [0004] Grouting is a project that reduces leakage or strengthens strata, foundations or buildings by plugging open geological defects. Generally, the slurry pressure is sent to the cracks in the stratum or building foundation, the fault fracture zone or the joints and cracks of the building itself, so as to improve the impermeability and integrity of the irrigated stratum or building. There are two types of materials currently used in grouting plugging and reinforcement technology: one is chemical grouting materials based on organic polymer materials; the other is inorganic grouting materials based on cement. Because cement grouting has the advantages of high solid strength, wide source of materials, low price, convenient storage and transportation...

Claims

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Application Information

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IPC IPC(8): E02D29/16
CPCE02D29/16E02D2250/003E02D2300/0045
Inventor 胡炜韩练练毕亚丽张勇王奇峰孙宇飞
Owner POWERCHINA XIBEI ENG
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