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Post-tensioned and pre-stressed pipe grouting agent

A prestressed pipeline and grouting agent technology, applied in the field of grouting agent, can solve the problems of poor slurry stability, poor fluidity, and high water-to-binder ratio, and achieve improved mechanical behavior, wide application range, and high flow. sexual effect

Inactive Publication Date: 2011-10-05
浙江五龙新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the requirements for grouting materials are getting higher and higher. For traditional grouting materials, the patent number: 200710143812.1, the patent name is: a high-performance cement-based non-shrinkage anti-corrosion grouting agent, the disadvantage of which is strength Low, poor slurry stability, etc.
The patent number is: 200410014079.X The patent name is: post-tensioned bonded prestressed concrete high-performance grouting admixture, the disadvantages are high water-binder ratio, poor fluidity, etc.

Method used

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  • Post-tensioned and pre-stressed pipe grouting agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Grouting agent according to: water reducing component 11%, swelling component 35%, high dispersion component 1%, shrinkage reducing component 0.01%, rust inhibiting component 10%, modified gypsum 5%, hydroxypropyl methylcellulose Plain 0.0005%, fly ash 37.9895%. Add fly ash, expansion agent, etc. in sequence according to the above weight ratio, and then stir for 1 hour.

Embodiment 2

[0027] Embodiment 2: The grouting agent is according to: water reducing component 11%, swelling component 30%, high dispersion component 0.8%, shrinkage reducing component 0.015%, rust inhibiting component 12%, modified gypsum 8%, hydroxypropyl Base methyl cellulose 0.0005%, fly ash 38.1845%. According to the above weight ratio, add fly ash, expansion agent, etc. in sequence, and then stir for 1.5 hours.

Embodiment 3

[0028] Embodiment 3: grouting agent according to: water reducing component 11%, swelling component 35%, high dispersion component 0.8%, shrinkage reducing component 0.015%, antirust component 11%, modified gypsum 7%, hydroxypropyl Base methyl cellulose 0.0005%, fly ash 35.1845%. Add fly ash, expansion agent, etc. in sequence according to the above weight ratio, and then stir for 2 hours.

[0029] The composition of the grout is as follows (based on 1 ton of dry material):

[0030] Cement P.O 42.5: 850 kg, grouting agent: 150 kg, water: 280 kg, water-binder ratio: 0.28

[0031] Table 1. The experimental situation of embodiment

[0032]

[0033] It can be seen from the above table that adding the product of the present invention can make the press grout achieve high fluidity at a very low water-to-binder ratio, and make such a thin slurry maintain good system stability , no settlement, no bleeding.

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Abstract

The invention, belonging to the technical field of grouting agent, particularly relates to a high performance post-tensioned and pre-stressed pipe grouting agent, comprising the following ingredients: 2-20wt% of water reducing component, 10-40wt% of expanding component, 0.5-2wt% of high dispersion component, 0.001-0.02wt% of reduction component, 2-20wt% of anticorrosion component, 1-10wt% of modified gypsum component, 0-0.001wt% of thickening component and 10-40wt% of fly ash. According to the invention, the mechanical behavior of concrete is improved, the bearing capacity of concrete is reinforced, the service life of concrete is increased, high fluidity can be achieved under the condition that water to binder ratio is very low, good stability of system of the dilute slurry is maintained, and the slurry has no settlement and no water segregation.

Description

technical field [0001] The invention belongs to the technical field of grouting agents, and in particular relates to a high-performance post-tensioning prestressed pipeline grouting agent. Background technique [0002] Improper grouting of post-tensioned prestressed pipes is one of the common quality problems of modern concrete bridge construction, which will seriously affect the ultimate bearing capacity and structural durability of the structure. Hazards and mechanism analysis of prestressed pipe grouting caused by inaccurate steel corrosion is one of the mechanisms of concrete structure damage, while the fundamental purpose of channel grouting is to remove water and air in the channel, prevent prestressed tendons from being corroded, and ensure prestressed pipes. Component durability. [0003] In the construction of post-tensioning prestressing method, how to make the pipeline grouting dense, not delaminated, uniform in strength, steel hinge line not corroded, and prestr...

Claims

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Application Information

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IPC IPC(8): C04B24/38
CPCC04B40/0039C04B2103/302Y02W30/91C04B18/08C04B22/008C04B22/143C04B24/226C04B28/02C04B2103/44C04B2103/58C04B2103/61C04B24/383C04B24/2641
Inventor 李洪涛王瑜玲王家丰宋永良单光焱葛黎明周炯
Owner 浙江五龙新材股份有限公司