Interface treatment method for horizontal construction seam of concrete

A technology for horizontal construction joints and interface treatment, applied to building components, building insulation materials, etc., can solve the problems of construction noise, surrounding environment impact, labor and time-consuming operation, and pollution of the construction environment, so as to achieve good construction effect, good treatment effect, The effect of short construction time

Inactive Publication Date: 2015-07-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this conventional chiseling treatment method, the operation is labor-intensive and time-consuming, and it will also cause local damage to the first batch of poured concrete
In addition, the dust generated by chiseling construction will pollute the construction environment, and the construction noise generated by chiseling will also have an impact on the surrounding environment
[0003] Chinese patent CN104261764A discloses a shrinkage-reducing concrete interface treatment method. This method adopts the slurry of the interface treatment agent to be attached to the concrete construction interface by spraying to improve the bonding strength of the concrete interface. Because the interface treatment agent of the method It plays the role of strengthening the interface bonding and bonding the old and new concrete on the concrete construction interface. This method takes a long time to operate, the bonding effect is poor, and it is not suitable for large-area construction joint interfaces.

Method used

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  • Interface treatment method for horizontal construction seam of concrete
  • Interface treatment method for horizontal construction seam of concrete
  • Interface treatment method for horizontal construction seam of concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for interface treatment of concrete horizontal construction joints, comprising the steps of:

[0026] 1) if figure 1 As shown, the concrete is poured to form the first pouring concrete 1 and the natural forming interface 2 of the horizontal construction joint;

[0027] 2) if figure 2 As shown, when the first poured concrete reaches initial setting, concrete retarder 3 is sprayed on the natural forming interface of concrete horizontal construction joints. Concrete retarder 3 is lignosulfonate retarder, and the spraying amount is 200g / m 2 ;

[0028] 3) if image 3 As shown, after spraying the lignosulfonate retarder for 10 hours, use a high-pressure water gun to wash the construction joint interface to remove the laitance retarder layer at the interface, so that the coarse aggregate at the interface is exposed, and the uneven interface treatment effect is achieved. , forming the interface 4 after construction joint treatment;

[0029] 4) When the concrete p...

Embodiment 2

[0031] A method for interface treatment of concrete horizontal construction joints, comprising the steps of:

[0032] 1) Concrete pouring, forming the first pouring concrete 1, and the natural forming interface 2 of the horizontal construction joint;

[0033] 2) When the first poured concrete reaches initial setting, spray concrete retarder 3 on the natural forming interface of concrete horizontal construction joints. Concrete retarder 3 is lignosulfonate retarder, and the spraying amount is 300g / m 2 ;

[0034] 3) After spraying the lignosulfonate retarder for 15 hours, use a high-pressure water gun to wash the construction joint interface to remove the laitance retarder layer at the interface, so that the coarse aggregate at the interface is exposed, and the uneven interface treatment effect is achieved. Form the interface 4 after the construction joint treatment;

[0035] 4) When the concrete poured for the first time reaches the specified curing time, the concrete is pour...

Embodiment 3

[0037] A method for interface treatment of concrete horizontal construction joints, comprising the steps of:

[0038] 1) Concrete pouring, forming the first pouring concrete 1, and the natural forming interface 2 of the horizontal construction joint;

[0039] 2) When the first poured concrete reaches initial setting, spray concrete retarder 3 on the natural forming interface of concrete horizontal construction joints. Concrete retarder 3 is lignosulfonate retarder, and the spraying amount is 400g / m 2 ;

[0040] 3) After spraying the lignosulfonate retarder for 20 hours, use a high-pressure water gun to flush the construction joint interface to remove the laitance retarder layer at the interface, so that the coarse aggregate at the interface is exposed, and the uneven interface treatment effect is achieved. Form the interface 4 after the construction joint treatment;

[0041] 4) When the concrete poured for the first time reaches the specified curing time, the concrete is pou...

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Abstract

The invention discloses an interface treatment method for the horizontal construction seam of concrete. According to the method, a concrete retarder is used for interface treatment of the horizontal construction seam. The method comprises the steps that (1) concrete is poured for the first time, and a horizontal construction seam natural forming interface is formed; (2) when the concrete which is poured for the first time achieves initial set, the concrete retarder is sprayed on the horizontal construction seam natural forming interface of the concrete; (3) after the concrete retarder is sprayed for a certain period, the construction seam interface is flushed, a floating retarder layer on the interface is removed, a coarse aggregate at the interface is made to be exposed, and an uneven interface treatment effect is achieved; (4) after the concrete which is poured for the first time reaches the specified curing time, the concrete is poured secondarily on the construction seam interface. Compared with the prior art, the interface treatment method for the horizontal construction seam of concrete has the advantages that the method is advanced, the treatment effect is good, operation is easy, the cost is low, and the applicable range is wide.

Description

technical field [0001] The invention belongs to the field of building construction and relates to an interface treatment method for concrete horizontal construction joints. Background technique [0002] Before the secondary pouring at the concrete construction joints in the project, the pouring interface is usually manually or mechanically chiseled to improve the bonding strength and impermeability of the concrete pouring interface. For this conventional chiseling treatment method, it is labor-intensive and time-consuming to operate, and it will also cause local damage to the first batch of poured concrete. In addition, the dust generated by chiseling construction will pollute the construction environment, and the construction noise generated by chiseling will also have an impact on the surrounding environment. [0003] Chinese patent CN104261764A discloses a shrinkage-reducing concrete interface treatment method. This method adopts the slurry of the interface treatment age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/68
Inventor 陈世鸣汤晓波雷明鸣
Owner TONGJI UNIV
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