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Post-tensioned pre-stressing pipeline grouting agent

A technology of prestressed pipeline and grouting agent, which is applied in the field of building materials to ensure compactness, avoid settlement and cracking, and improve impermeability.

Inactive Publication Date: 2015-03-11
GANSU CHANGLONG HIGHWAY MAINTENANCE TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A specific performance can be obtained by using one admixture, but there may be adverse effects on each other when multiple admixtures are used at the same time

Method used

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  • Post-tensioned pre-stressing pipeline grouting agent
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  • Post-tensioned pre-stressing pipeline grouting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 A post-tensioning prestressed pipeline grouting agent, the grouting agent is obtained by stirring the raw material components in the following weight percentage (kg) at a speed of not less than 1000r / min: water-reducing component 4.7%, plasticity Expansion component 0.3%, mid-late expansion component 28.2%, stabilizing component 0.1%, retarding component 0.4%, defoaming component 0.3%, ultrafine active mineral admixture 47.1%; sulphoaluminate cement 18.9% %.

[0033] in:

[0034] The water-reducing component refers to the powdered polycarboxylate water-reducing agent with a water-reducing rate ≥ 20%, and the manufacturer is Suzhou Fuke New Building Materials Co., Ltd.

[0035] The plastic expansion component refers to the plastic expansion agent, and the manufacturer is Beijing Wanji Jianye Co., Ltd.

[0036] The middle and later expansion components refer to UEA expansion agent, and the manufacturer is Lanzhou Tianchuang Keyuan New Building Materials Co...

Embodiment 2

[0046] Example 2A post-tensioning prestressed pipeline grouting agent, the grouting agent is obtained by stirring the raw material components in the following weight percentage (kg) at a speed of not less than 1000r / min: water-reducing component 5.1%, plasticity Expansion component 0.5%, mid-late expansion component 30.1%, stabilizing component 0.2%, retarding component 0.5%, defoaming component 0.5%, superfine active mineral admixture 43.0%; sulphoaluminate cement 20.1% %.

[0047] in:

[0048] Water-reducing components, plastic expansion components, defoaming components, and sulphoaluminate cement are the same as in Example 1.

[0049] The middle and late expansion component refers to HEA expansion agent, and the manufacturer is Nanjing Pioneer Technology Industrial Co., Ltd.

[0050] The stabilizing component refers to hydroxypropyl methylcellulose, and the manufacturer is Gomez Chemical (China) Co., Ltd.

[0051] The retarding component refers to sodium gluconate, and...

Embodiment 3

[0057] Example 3 A post-tensioning prestressed pipeline grouting agent, which is obtained by uniformly stirring the following raw material components in weight percentage (kg) at a speed of not less than 1000r / min: water-reducing component 5.0%, plasticity Expansion component 0.4%, mid-late expansion component 29.8%, stabilizing component 0.2%, retarding component 0.5%, defoaming component 0.4%, ultrafine active mineral admixture 43.3%; sulphoaluminate cement 20.4% %.

[0058] in:

[0059] Water-reducing components, plastic expansion components, defoaming components, sulphoaluminate cement, mid-late expansion components, stabilizing components, retarding components, superfine active mineral admixtures Example 1 .

[0060] When in use, the grouting agent is used to replace 11% of the amount of Portland or ordinary Portland cement with a strength not lower than 42.5, and the water-binder ratio is 0.27, and it is stirred evenly to make a grouting material for post-tension...

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Abstract

The invention relates to a post-tensioned pre-stressing pipeline grouting agent, which is obtained by uniformly stirring the following raw materials according to weight percentage with rotating speed of no lower than 1000r / min: 4.7-5.1% of water reducing component, 0.3-0.5% of plastic expansion component, 28.2-30.1% of middle- to late-stage swelling component, 0.1-0.2% of stabilization component, 0.3-0.5% of delayed coagulation component, 0.3-0.5% of defoaming component, 43.0-47.1% of ultrafine active mineral admixture material and 18.9-20.4% of sulphoaluminate cement. The post-tensioned pre-stressing pipeline grouting agent has good performance, can satisfy requirement of industrialized production and can satisfy requirement of on-site construction preparation, construction operation is simple, and the grouting agent is especially suitable for post-tensioned pre-stressing pipeline grouting construction of large-scale engineering such as road, bridge and nuclear power station.

Description

technical field [0001] The invention relates to the technical application field of building materials, in particular to a post-tensioning prestressed pipeline grouting agent. Background technique [0002] The quality of channel grouting directly affects the efficiency of prestressing and the durability of structures. The occurrence of many bridge accidents and early maintenance and reinforcement, and the grouting of the tunnels, there are pores caused by the bleeding and shrinkage of the grouting material, the grouting is not dense, not full, water is retained or infiltrated in the pores, and the prestressed tendons cannot get cement slurry The anti-rust protection has a lot to do with the decrease of the bearing capacity of the bridge. [0003] At present, many construction units adopt the method of mixing expansion agent and water reducing agent in cement, which often causes insufficient grouting due to poor construction management, or poor grip with prestressed steel str...

Claims

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Application Information

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IPC IPC(8): C04B28/06
Inventor 李晓民赵璠新李刊张国宏魏定邦赵静卓杨敬礼丁民王晖曹青霞郭怀存杨小森冯中良张兴军陈天峰李丽
Owner GANSU CHANGLONG HIGHWAY MAINTENANCE TECH RES INST CO LTD
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