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A low negative temperature post-tensioned beam prestressed pipeline grouting material

A prestressed pipe and negative temperature technology is applied in the field of post-tensioned beam prestressed pipe grouting material at low negative temperature and post-tensioned beam prestressed pipe grouting material, which can solve the problems of high energy consumption and difficulty in ensuring construction quality, etc. Achieve the effect of improving construction efficiency, reducing a lot of energy consumption and quality risks, and achieving obvious results

Active Publication Date: 2011-12-14
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of method consumes a lot of energy and it is difficult to guarantee the construction quality. Therefore, pipeline grouting materials that can be safely applied under certain negative temperature conditions are very necessary for projects that require winter construction

Method used

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  • A low negative temperature post-tensioned beam prestressed pipeline grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0042] The aluminum-calcium-silicon weight ratio of the cement used in Example 11 is 1:2.5:0.3, and the other ingredients are the same as in Examples 1-10.

Embodiment 12

[0043] The cement used in embodiment 12 is P.O42.5 ordinary portland cement, and other ingredients are identical to embodiment 1-10.

[0044] As can be seen from the test results, the early strength of Example 4 without adding the hardening component is far lower than the performance of the embodiment with the hardening component added; and the cement does not meet the aluminum-calcium-silicon ratio of the present invention The setting time of the mortar of 11 is prolonged, and the strength is low; the mineral admixture increases from 0 to 5 parts by weight, and the long-term strength of the mortar increases; strength. The prior art grouting material for normal temperature in Example 12 cannot solidify and harden at low temperatures, and appears in a frozen state.

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a low negative temperature post-tensioned beam prestress pipeline mudjacking material. The material disclosed by the invention is prepared from cement, a poly-carboxylate water reducer, an anti-freezing component, a retardant component, a harness promoting component, mineral admixtures and an expanding agent through mixing and stirring; the material can be used for the construction of pipe mudjacking of a post-tensioned prestressing T beam and a continuous beam in the construction condition not lower than minus 10 DEG C; and the effect of the material is more obvious in the environment condition of shifts between positive and negative temperatures day and night. The strength of hardened mortarcan develop continuously in the conditions of low temperature and negative temperature, the maintenance time can be shortened greatly, the construction efficiency can be improved, and large energy consumption required by low and negative temperature construction can be reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a post-tensioned beam prestressed pipeline grouting material, in particular to a post-tensioned beam prestressed pipeline grouting material with low negative temperature (-10°C to 5°C). It is used for pipe grouting construction of post-tensioned beams such as post-tensioned prestressed T-beams and continuous beams at a construction environment temperature not lower than -10°C. Background technique [0002] Post-tensioned beam prestressed pipeline grouting is a prestressed anti-corrosion technology commonly used in prefabricated beams of high-speed railways and passenger dedicated lines in my country. The Ministry of Railways standard TB / T3192-2008 "Technical Conditions for Pipeline Grouting of Railway Post-tensioned Concrete Beams" has detailed regulations on pipeline grouting materials, but the current standard only allows construction at positive temperatures (greater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/36C04B28/06
Inventor 张勇杨富民石刚强张先军王基全赵世运刘晓光陈玉琪李晨闫俊洁
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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