Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Prestressed pipe grouting agent

A prestressed pipeline and grouting agent technology, applied in the field of grouting agent preparation, can solve the problems of poor stability, poor fluidity, and high bleeding rate of the grouting agent, and achieve low cost, pollution-free access, and good expansibility Effect

Active Publication Date: 2014-01-29
HUNAN LIANZHI BRIDGE & TUNNEL TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a prestressed pipeline grouting agent to solve the technical problems of existing grouting agents such as poor stability, poor fluidity, large bleeding rate, and many voids.

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
  • Prestressed pipe grouting agent
  • Prestressed pipe grouting agent
  • Prestressed pipe grouting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Embodiments of the invention are described in detail below, but the invention can be practiced in many different ways as defined and covered by the claims.

[0030] The invention discloses a prestressed pipeline grouting agent, which comprises the following components and contents:

[0031] High-efficiency water reducer: 3.5-5%; early expansion agent: 50-70%;

[0032] Mid-term expansion agent: 1~3%; Post-expansion agent: 1-4%;

[0033] Dispersant: 0.25~0.75%; Hydrolyzed polyacrylonitrile ammonium salt: 0.05~0.2%;

[0034] Defoamer: 0.1-0.3%; Slag: 20-40%.

[0035] Among them, high-efficiency water reducer is an admixture that keeps the cement paste, mortar and concrete workability unchanged and significantly reduces its mixing water consumption; by dispersing cement particles, and forming a water film and a hydrophilic three-dimensional adsorption layer on the surface of the particles, It can significantly increase the strength of concrete, improve the frost resistan...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a prestreesed pipe grouting agent, comprsing 3.5-5% of super plasticizer, 50-70% of early expansion agent, 1-3% of middle expansion agent, 1-4% of late expansion agent, 0.25-0.75% of dispersing agent, 0.05-0.2% of NPAN, 0.1-0.3% of antifoaming agent, and 20-40% of slag. According to the invention, the industrial production process of the grouting agent is simple, the product quality is stable; by using the water with the water-cement ratio of 0.26-0.28 and the pH value of neutral to uniformly mixing, the characteristics of high fluidity, no free weepage, microdilatancy, proper setting time, high strength of set cement, etc. are achieved.

Description

technical field [0001] The invention relates to the field of grouting agent preparation, in particular to a prestressed pipeline grouting agent. Background technique [0002] Domestically, the traditional grouting agent used in early prestressed tunnel grouting is generally pure cement slurry. During construction, cement, water, water reducing agent, expansion agent, etc. are used for on-site preparation. The grout prepared on site must meet the following requirements: the water-cement ratio is 0.40-0.45, and the water-cement ratio can be reduced to a minimum of 0.35 by adding an appropriate amount of water reducing agent; the maximum bleeding rate of the grout should not exceed 3%, and the bleeding should be Re-absorbed by the mortar within 24 hours; the viscosity of the grout should be controlled within 14-18s, because the viscosity of the polymer mortar is not as high as that of the grout, and the grout must have a certain expansion before solidification; The compressive...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/40
Inventor 刘柳奇梁晓东王庆国肖映城
Owner HUNAN LIANZHI BRIDGE & TUNNEL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com