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Ultra-low content post-tensioning prestressed pipeline grouting agent, its preparation method and application

A post-tensioning prestressing and grouting agent technology, which is applied in the field of building materials, can solve problems such as long mixing time, long production cycle, and non-conforming performance indicators, and achieve the effects of good adaptability, fullness, and durability

Active Publication Date: 2016-06-29
BEIJING NEW VISION BUILDING CONSTR TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application CN102206062A discloses a post-tensioning prestressed pipeline grouting agent, the stirring time in the production process is as long as 1 to 2 hours, the production cycle is too long, and the energy consumption is too high
Chinese patent application CN101817656A discloses a post-tensioned prestressed concrete beam pipeline grouting agent, Chinese patent application CN102260056A discloses a post-tensioned prestressed channel grouting agent, and Chinese patent application CN102092982A discloses a concrete pipeline grouting agent agent and preparation method, the water-binder ratio described in the above patent applications is greater than 0.28, and the performance indicators do not meet the industry standard "Technical Specifications for Highway Bridge and Culvert Construction" JTG / TF50-2011 issued by the Ministry of Transport

Method used

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  • Ultra-low content post-tensioning prestressed pipeline grouting agent, its preparation method and application
  • Ultra-low content post-tensioning prestressed pipeline grouting agent, its preparation method and application
  • Ultra-low content post-tensioning prestressed pipeline grouting agent, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Each component is by weight percentage as follows:

[0061] Water-reducing component powdered polycarboxylate superplasticizer 48%,

[0062] Molecular sieve 4%,

[0063] Sulphoaluminate expansion agent 20%,

[0064] Organic bentonite 20%,

[0065] Calcium formate 0.25%,

[0066] Sodium Gluconate 0.75%,

[0067] Alkylsulfonate air-entraining agent 0.5%,

[0068] Polyether defoamer 5%,

[0069] Amino alcohol steel rust inhibitor 1.5%,

[0070] Put it into a mixer with a mixing accuracy of more than 1,000 grades, and continue mixing and stirring for 2 to 4 minutes to obtain an ultra-low content post-tensioning prestressed pipeline grouting agent.

[0071] At the construction site, it is mixed with ordinary Portland cement according to the weight ratio of cement: grouting agent = 99:1, and the water-binder ratio is 0.27. It is mixed with a planetary cement mortar mixer. The specific performance test method is in accordance with "Technical Specifications for Construct...

Embodiment 2

[0075] Each component is by weight percentage as follows:

[0076] Water-reducing component powdered polycarboxylate superplasticizer 40%,

[0077] Activated carbon 5%,

[0078] Sulphoaluminate expansion agent 25%,

[0079] Organobentonite and hydroxyethyl methyl cellulose ether are 20% of composite stable components in a weight ratio of 4:1,

[0080] Sodium citrate 0.5%,

[0081] Saponin air-entraining agent 1.5%,

[0082] Polyether defoamer 6.5%,

[0083] Amino alcohol steel rust inhibitor 1.5%,

[0084] Put it into a mixer with a mixing accuracy of more than 1,000 grades, and continue mixing and stirring for 2 to 4 minutes to obtain an ultra-low content post-tensioning prestressed pipeline grouting agent.

[0085] At the construction site, it is mixed with ordinary Portland cement according to the weight ratio of cement: grouting agent = 98.5:1.5, and the water-binder ratio is 0.28. It is mixed with a planetary cement mortar mixer. The specific performance test method...

Embodiment 3

[0089] Each component is by weight percentage as follows:

[0090] Water-reducing component powdered polycarboxylate superplasticizer 52%,

[0091] 1% compound of p-nitrobenzenediazonium fluoroborate, iminodiacetonitrile, N,N-dicyclohexyl-2-benzothiazole sulfenamide in a weight ratio of 2:1:4,

[0092] Sulphoaluminate expansion agent 17.5%,

[0093] Silica fume and vinyl acetate / ethylene copolymer redispersible latex powder with a weight ratio of 9:1 composite stabilization component 20%,

[0094] Silicone defoamer 8%,

[0095] 1.5% alkylamic acid salt steel rust inhibitor,

[0096] Put it into a mixer with a mixing accuracy of more than 1,000 grades, and continue mixing and stirring for 2 to 4 minutes to obtain an ultra-low content post-tensioning prestressed pipeline grouting agent.

[0097] At the construction site, it is mixed with ordinary Portland cement according to the weight ratio of cement: grouting agent = 99.2:0.8, the water-binder ratio is 0.27, and a high-spe...

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Abstract

The invention belongs to the field of building materials, and concretely discloses an ultralow-content post-tensioned pre-stressed pipeline grouting agent, a preparation method and an application thereof. The grouting agent comprises 30-60wt% of a water reducing component, 1-5wt% of a plastic expansion component, 10-25wt% of a hardening after-expansion component, 5-20wt% of a stabilizing component, 0-0.5wt% of an early strength component, 0-1wt% of a retarding component, 0-1.5wt% of an air entraining component, 2-8wt% of an antifoaming component and 0-1.5wt% of a rust prevention component. The grouting agent has the advantages of simple production process, high fluidity, no water segregation, high strength and micro expansion, significantly reduces the possibility of the introduction of harmful ions into a pre-stressed concrete beam body pipeline and ensures the structure durability. An extremely low proportion of 0.8-1.5% of the grouting agent is added to cement, water is added according to a water / binder ratio of 0.26-0.28, uniform stirring is carried out prepare a grouting material, and the grouting material can be widely used in the duct grouting of a post-tensioned pre-stressed concrete structure.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to a post-tensioned prestressed concrete beam pipeline grouting agent suitable for highway bridge and culvert engineering. The grouting agent can also be applied to railway engineering, petroleum engineering, nuclear power engineering, etc. Pipe grouting for concrete structures, and the invention also relates to a preparation method and application of the grouting agent. Background technique [0002] The grouting quality of the post-tensioned prestressed concrete beam pipe is an important measure to ensure the quality of bridge construction. The quality of grouting that meets the design requirements can ensure the effective transmission of prestress, and at the same time, it can well protect the prestress tendons from being eroded by harmful ions in the surrounding environment, so that the prestress tendons can fully play their role. [0003] Therefore, relevan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/38C04B24/40C04B24/34C04B22/08C04B22/14C04B22/02C04B24/20
Inventor 郑旗宋涛文任恩平
Owner BEIJING NEW VISION BUILDING CONSTR TECH