Post stressed concrete beam pipe mudjacking agent

A technology for concrete beams and grouting agent, which is applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of aluminum powder gas generation greatly affected by ambient temperature and "hydrogen embrittlement of prestressed steel bars" , to achieve the effect of excellent water retention performance, good filling, and low sensitivity to temperature and humidity

Active Publication Date: 2010-09-01
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
View PDF2 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Chinese patent CN 1559960A discloses a high-performance grouting admixture for post-tensioned prestressed concrete, in which the early shrinkage of the cement paste is compensated by adding aluminum powder, but in actual construction, the amount of gas produced by the aluminum powder is affected b

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Post stressed concrete beam pipe mudjacking agent
  • Post stressed concrete beam pipe mudjacking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] High-efficiency water-reducing component: 2.2%

[0036] Early expansion component: 8.5%

[0037] Middle and late expansion component: 35%

[0038] Mineral admixture composition: 52.95%

[0039] Antirust component: 0.5%

[0040] Water retaining agent component: 0.04%

[0041] Defoaming component: 0.6%

[0042] Retarding component: 0.2%

[0043] Air-entraining component: 0.01%

[0044] The present invention is obtained by uniformly mixing each component according to the above weight percentage.

[0045] See Table 1 for the performance of the grouting material formed after the present invention mixed with cement (replacing cement 13%) and water prepared by the above formula.

[0046] Physical properties of grout

[0047] Table 1

[0048]

[0049] Note: the water-binder ratio used is (that is, water / (cement+grouting agent) is 0.31), the dosage of the present invention is internal blending, and the dosage of the grouting agent is 13%.

Embodiment 2

[0051] High-efficiency water-reducing component: 1.8%

[0052] Early expansion component: 6.0%

[0053] Mid-late expansion component: 45%

[0054] Mineral admixture component: 45.95%

[0055] Antirust component: 0.5%

[0056] Water retaining agent component: 0.03%

[0057] Defoaming component: 0.4%

[0058] Retarding component: 0.3%

[0059] Air-entraining component: 0.02%

[0060] The present invention is obtained by uniformly mixing each component according to the above weight percentage.

[0061] See Table 2 for the performance of the grouting material formed after the present invention mixed with cement (replacing cement 13%) and water prepared by the above formula.

[0062] Physical properties of grout

[0063] Table 2

[0064]

[0065] Note: the water-binder ratio used is (that is, water / (cement+grouting agent) is 0.32), the dosage of the present invention is internal blending, and the dosage of the grouting agent is 13%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a post stressed concrete beam pipe mudjacking agent which is characterized by comprising the following components in percent by weight: 1-3 percent of efficient slushing component, 5-10 percent of early-expanded component, 30-50 percent of middle-late expanded component and 40-60 percent of mineral admixture. The invention also provides a preparation method of the post stressed concrete beam pipe mudjacking agent, which comprises the step of uniformly stirring the components in a stirrer according to the weight percent to obtain the post stressed concrete beam pipe mudjacking agent. The post stressed concrete beam pipe mudjacking agent, cement and water are mixed according to a certain proportion to prepare a mudjacking material to be used for construction. The mudjacking agent has optimal flowing property, excellent water holding property, better compactness, full and uniform structure and good early plastic expanded performance, does not contain additives with corrosion on prestressed reinforcing steel, and has very low chloridion content, better adaptability with various cements and lower sensitivity on temperature and humidity.

Description

Technical field: [0001] The invention belongs to an admixture for channel grouting of railway post-tensioned prestressed concrete beams (including simply supported beams and continuous beams), in particular to a high-performance railway post-tensioned prestressed concrete beam pipe grouting agent. The grouting agent can also be applied to the grouting construction of prestressed reinforced concrete channels in large-scale projects such as bridges and nuclear power plants. Background technique: [0002] Prestressed concrete technology is one of the 10 new technologies promoted and applied during the "Ninth Five-Year Plan" and "Tenth Five-Year Plan" by the Ministry of Construction. It is widely used in buildings, bridges and special engineering structures, and is an indispensable and important component of construction technology. part. [0003] In the post-tensioned prestressed concrete structure, the prestressed steel and concrete in the bonded prestressed concrete have a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B24/26C04B103/30
CPCC04B40/0039Y02W30/91C04B18/08C04B18/141C04B18/146C04B22/008C04B28/02C04B2103/0068C04B2103/20C04B2103/302C04B2103/304C04B2103/46C04B2103/50C04B14/022C04B14/047C04B14/104C04B20/002C04B24/383
Inventor 田凤兰段文锋王新锋熊卫锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap