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Post-tensioned prestressed pipeline geopolymer grouting material and its admixture in high temperature environment

A post-tensioning, geopolymer technology, applied in solid waste management, sustainable waste treatment, cement production, etc., can solve problems such as non-involvement, avoid self-shrinkage, avoid internal relative humidity reduction, and large pore volume Effect

Active Publication Date: 2016-05-04
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on admixtures for post-tensioned prestressed pipeline geopolymer grouting materials in the open literature

Method used

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  • Post-tensioned prestressed pipeline geopolymer grouting material and its admixture in high temperature environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: An admixture for post-tensioned prestressed pipeline geopolymer grouting material in a high temperature environment, including A component and B component, wherein,

[0031] Component A is made by mixing the following components evenly according to the weight ratio:

[0032] Burnt quicklime: 55.33%,

[0033] Meerschaum: 11.34%,

[0034] Magnesium aluminum silicate: 16.64%,

[0035] Vinyl glue: 0.03%,

[0036] Calcium nitrate: 16.66%;

[0037] Component B is made by mixing the following components evenly according to the weight ratio:

[0038] Anti-mud type polycarboxylate superplasticizer: 30%,

[0039] Calcium lignosulfonate: 10%,

[0040] Water: 60%.

[0041] The post-tensioned prestressed pipeline geopolymer grouting material using the admixture in Example 1 is made from the following raw materials: 2000g of Ⅱ grade fly ash, 2000g of S95 grade granulated blast furnace slag, 1026g of water glass, 78g of sodium hydroxide, Water 652g, A component 4...

Embodiment 2

[0042] Embodiment 2: an admixture for polymer grouting materials for post-tensioned prestressed pipelines under high temperature environment, including A component and B component, wherein,

[0043] Component A is made by mixing the following components evenly according to the weight ratio:

[0044] Burnt quicklime: 54.50%,

[0045] Meerschaum: 12.14%,

[0046] Polymeric thixotropic lubricant: 16.62%,

[0047] Vinyl glue: 0.08%,

[0048] Calcium nitrate: 8.33%,

[0049] Zinc nitrate: 8.33%;

[0050] Component B is made by mixing the following components evenly according to the weight ratio:

[0051] Anti-mud type polycarboxylate superplasticizer: 40%,

[0052] Water: 60%.

[0053] The post-tensioned prestressed pipeline geopolymer grouting material using the admixture in Example 2 is made from the following raw materials: 1800g of Ⅱ grade fly ash, 2200g of S95 grade granulated blast furnace slag, 1026g of water glass, 78g of sodium hydroxide, Water 610g, A component 52...

Embodiment 3

[0054] Embodiment 3: An admixture for polymer grouting materials for post-tensioned prestressed pipelines under high temperature environment, including A component and B component, wherein,

[0055] Component A is made by mixing the following components evenly according to the weight ratio:

[0056] Burnt quicklime: 57.16%,

[0057] Sepiolite: 9.54%,

[0058] Smectite: 16.60%,

[0059] Vinyl glue: 0.10%,

[0060] Zinc nitrate: 16.60%;

[0061] Component B is made by mixing the following components evenly according to the weight ratio:

[0062] Anti-mud type polycarboxylate superplasticizer: 50%,

[0063] Water: 50%.

[0064] The post-tensioned prestressed pipeline geopolymer grouting material using the admixture in Example 3 is made from the following raw materials: 1800g of Ⅱ grade fly ash, 2400g of S95 grade granulated blast furnace slag, 1030g of water glass, 80g of sodium hydroxide, Water 590g, A component 528g, B component 88g. The ambient temperature for grouting...

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Abstract

The invention discloses a post-tensioned pre-stressing pipe geopolymer grouting material in a high temperature condition and an additive. The additive comprises, by weight, 108-132 parts of an ingredient A and 19-22 parts of an ingredient B. The ingredient A is composed of 52.56%-57.16% of overburn quicklime, 9.54%-12.14% of meerschaum, 16.57%-18.67% of thixotropic lubricants, 0.03%-0.13% of stabilizing agents and 11.9%-21.3% of inorganic salt through mixing. The ingredient B is composed of 20%-50% of carboxylic high performance water-reducing agents, 0%-20% of lignosulfonate and 30%-80% of water through mixing. The geopolymer grouting material prepared from the additive has no contraction, the volume stability is good, the intensity is high, the thixotropy and the stability are good under a high temperature environment, the fluidity is large, and the grouting material has appropriate coagulation time and small fluidity loss.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a polymer grouting material for post-tensioned prestressed pipelines under high temperature environment and an admixture thereof. Background technique [0002] At present, my country's highways, high-speed railways and intercity railways are constructed on a large scale. In order to ensure the quality of post-tensioned bridges in these projects, post-tensioned prestressed grouting materials must have large fluidity, small fluidity loss, low Bleeding rate, no shrinkage, high bond strength and other characteristics to achieve full grouting, good protection for steel strands, and effective load transfer. In the actual engineering construction process, the grouting material is generally prepared by using general-purpose Portland cement as the cementitious material, and various functional admixtures such as expansion agent and water reducing agent are used in combin...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B28/26C04B24/18C04B22/06C04B18/08C04B18/14
CPCY02P40/10Y02W30/91
Inventor 陈渊召李振霞仝玉萍李克亮王慧贤陈爱玖崔欣公静利
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER