Exterior wall construction joint leakage repairing process

A technology for construction joints and exterior walls, which is applied in the field of building crack repair, can solve the problems of affecting bearing capacity, durability and impermeability, poor impermeability at cracks, and inefficient repair process, so as to reduce the generation of micro cracks, Improved mechanical properties and low overall viscosity

Pending Publication Date: 2022-04-29
上海广顺建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In today's infrastructure construction, concrete is widely used as a construction material due to its durability and low cost. However, because concrete is a multi-component, multi-phase, and heterogeneous cement-based composite material, it has a high elastic modulus. During the hardening process, various factors will cause the cast wall to crack, which will affect its bearing capacity, durability and impermeability
[0003] Therefore, the repairing process for the building cracks of the cracks produced in the concrete pouring process has also emerged at the historic moment. The repairing process in the related technology is still relatively traditional and inefficient: after the plastering layer at the crack is manually chiseled, and then the repair process is performed again. Structural cracks are re-plastered and repaired to complete the wall repair
[0004] Although the above-mentioned repairing method can also smooth the cracks to ensure the aesthetics and overall quality of the wall, the wall after the above-mentioned repairing method is easy to crack repeatedly, and the impermeability of the cracks is generally poor, so it is urgent Need to provide a kind of external wall construction joint seepage repair technology

Method used

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  • Exterior wall construction joint leakage repairing process
  • Exterior wall construction joint leakage repairing process
  • Exterior wall construction joint leakage repairing process

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0057] A plugging grouting material, which is composed of A component and B component, and its components and dosage are shown in Table 1. The specific preparation steps are as follows:

[0058] a. Stir component A at 1500r / min for 30 minutes to obtain a homogenized slurry for later use, wherein the alkali metal oxide in component A is magnesium oxide, and the alkali metal hydroxide is magnesium hydroxide;

[0059] b. First add 15% of the total weight of component B to the mixing homogenate, and stir and mix at 1500r / min for 5-15min, then raise the temperature to 65°C, add the rest of component B, and mix at 2500r / min 40min, the plugging grouting material can be prepared;

[0060] Wherein, the ether crosslinking agent in component B is glycerol triglycidyl ether; the accelerator is cobalt naphthenate; and the initiator is potassium persulfate.

preparation example 2-6

[0062] A plugging grouting material, which differs from Preparation Example 1 in that its components and their corresponding weights are shown in Table 1.

[0063] Each component and its weight (kg) of plugging grout in Table 1 Preparation Example 1-6

[0064]

[0065] Take the plugging grouting material prepared in the above application examples 1-6, and test its viscosity, permeability coefficient and sand-fixing body compressive strength according to the above measurement standards, and take the average value of the test results and record them in the table below.

[0066]

[0067]

[0068] It can be seen from the above table that the plugging grouting material prepared in Preparation Example 1-6 has a low overall viscosity of 8.0-9.0mPa.s; strong permeability and a permeability coefficient of 2.0*10 -7 -1.0*10 -6 ; It also has excellent elasticity and deformation resistance, and its compressive strength of sand consolidation body is as high as 410-482kPa;

[006...

preparation example 7

[0071] A kind of plugging grouting material, and the difference of preparation example 1 is that each parameter condition in its preparation step is as follows:

[0072] a. First, stir component A at 1000r / min for 15 minutes, and then mix and homogenize it for later use;

[0073] b. First add 10% of the total weight of component B to the mixing homogenate, and stir and mix at 1000r / min for 5min, then raise the temperature to 35°C, add the rest of component B, and mix at 2000r / min for 30min, The plugging grout can be prepared.

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Abstract

The invention relates to the technical field of building crack repairing, in particular to an outer wall construction joint leakage repairing technology. The outer wall construction joint leakage repairing technology comprises the following construction steps that S1, an outer wall construction joint facing layer is shoveled; s2, embedding a grouting needle head; s3, slurry preparation and grouting; and S4, the grouting needle head is removed, and the grouting hole is blocked. By means of the construction method and the obtained leaking stoppage grouting material, the anti-permeability of the leaking stoppage grouting material is remarkably improved, repeated cracking caused by damp or other reasons is not likely to happen, and then the repairing effect of a wall is guaranteed.

Description

technical field [0001] The present application relates to the technical field of repairing building cracks, more specifically, it relates to a technique for repairing leakage of construction joints in external walls. Background technique [0002] In today's infrastructure construction, concrete is widely used as a construction material due to its durability and low cost. However, because concrete is a multi-component, multi-phase, and heterogeneous cement-based composite material, it has a high elastic modulus. During the hardening process, various factors will cause the cast wall to crack, which will affect its bearing capacity, durability and impermeability. [0003] Therefore, the repairing process for the building cracks of the cracks produced in the concrete pouring process has also emerged at the historic moment. The repairing process in the related technology is still relatively traditional and inefficient: after the plastering layer at the crack is manually chiseled,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02C08F120/06C08K3/22
CPCE04G23/02E04G23/0211C08F120/06C08K3/22C08K2003/222C08K2003/2224
Inventor 李国柱
Owner 上海广顺建设工程有限公司
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