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

Centrifugal sprayed lining repairing mortar for pipeline and preparation method

A mortar and lining technology, which is applied in the field of pipeline centrifugal spraying lining repair mortar and preparation, can solve the problems of difficult to meet the requirements of centrifugal spraying construction, structural strength can not meet the repairing requirements, etc., to achieve good spraying operation, high Effects of Early Intensity, High Late Intensity

Inactive Publication Date: 2019-12-03
武汉中地大非开挖研究院有限公司
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the technical indicators of general mortar on the market are difficult to meet the requirements of centrifugal spraying construction, or the structural strength after spraying cannot meet the repair requirements

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
  • Centrifugal sprayed lining repairing mortar for pipeline and preparation method
  • Centrifugal sprayed lining repairing mortar for pipeline and preparation method
  • Centrifugal sprayed lining repairing mortar for pipeline and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Embodiments of the present invention provide a preparation method of the above-mentioned pipeline centrifugal spray lining repair mortar, comprising the following steps:

[0028] S1 Weigh 0-2 parts by weight of water reducer, 0-6 parts by weight of early strength agent, 0-5 parts by weight of anti-sag component and 0-5 parts by weight of redispersible latex powder, and premix them;

[0029] S2 weighs 30 to 80 parts by weight of cement, 20 to 70 parts by weight of sand, 0 to 20 parts by weight of mineral admixtures and 0 to 2 parts by weight of fiber, and adds them into the premixed mixture in step S1, and mixes them evenly to obtain mortar powder;

[0030] S3 Add water to the mortar powder according to the water-material ratio of 0.15-0.20 by weight, and stir evenly to obtain pipeline centrifugal spraying lining repair mortar.

Embodiment 1

[0032] A pipeline centrifugal spray lining repair mortar, prepared from the following raw materials: ordinary portland cement 450g, 40-70 mesh quartz sand 430g, silica fume 30g, 2000 mesh limestone powder 40g, polycarboxylate superplasticizer 3g , Anti-sag component 5g, redispersible latex powder 20g, calcium formate 5g, sodium hexametaphosphate 6g, sodium sulfate 9g, polypropylene fiber 2g.

[0033] Preparation:

[0034] S1 Weigh 3g of polycarboxylate superplasticizer, 5g of calcium formate, 6g of sodium hexametaphosphate, 9g of sodium sulfate, 5g of anti-sag component and 20g of redispersible latex powder, add them into the container and premix them ;

[0035] S2 Weigh 450g of ordinary Portland cement, 430g of 40-70 mesh quartz sand, 30g of silica fume and 2g of polypropylene fiber, and add them to the premixed mixture in step S1, and mix to obtain mortar powder;

[0036] S3 Weigh 150g of water, add it to the mortar powder prepared in the step S2, and stir evenly to obtain...

Embodiment 2

[0038] A pipeline centrifugal spray lining repair mortar, prepared from the following raw materials, ordinary portland cement 460g, 20-40 mesh quartz sand 150g, 40-70 mesh quartz sand 280g, silica fume 30g, 4000 mesh limestone powder 30g, poly Carboxylic acid superplasticizer 3.5g, anti-sag component 7g, redispersible latex powder 15g, calcium formate 4g, gypsum 10g, sodium hexametaphosphate 8g, basalt fiber 2.5g.

[0039] Preparation:

[0040] S1 Weigh 3.5g of polycarboxylate superplasticizer, 4g of calcium formate, 10g of gypsum, 8g of sodium hexametaphosphate, 7g of anti-sag component and 15g of redispersible latex powder, add them to the container and premix them ;

[0041] S2 Weigh 460g of ordinary Portland cement, 150g of 20-40 mesh quartz sand, 280g of 40-70 mesh quartz sand, 30g of silica fume, 30g of 4000 mesh limestone powder and 2.5g of basalt fiber, and add them to the pre-prepared powder in step S1. In the mixture, mix well to obtain mortar powder;

[0042] S3 ...

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 centrifugal sprayed lining repairing mortar for a pipeline. The mortar consists of the following components in percentage by weight: 30-80% of cement, 20-70% of sand, 0-20% of amineral admixture, 0-2% of a water reduction agent, 0-5% of an anti-sagging component, 0-6% of an early strength agent, 0-5% of redispersible latex powder and 0-2% of a fiber, wherein the anti-sagging component is prepared from 1-55% of starch ether, 90-98% of modified bentonite and 1-5% of a thickening agent through mixing; the thickening agent is one or more of hydroxypropyl methyl cellulose, xanthan gum and welan gum; and the molecular weight of the hydroxypropyl methyl cellulose is 6000, 10000 or 40000. The mortar has the beneficial effects that the slurry is good in flowability, small inpumping resistance and good in spraying operation performance; when the slurry stops flowing, the material is at a gel state instantaneously, the material which is sprayed to the surface of a substrate can be prevented from sagging because of self weight, thicknesses of different parts of a lining layer can be uniform, and the mortar is applicable to thick spraying.

Description

technical field [0001] The invention relates to the field of cement-based building materials, in particular to a pipeline centrifugal spraying lining repair mortar and a preparation method thereof. Background technique [0002] The urban underground pipe network is an important infrastructure of the city and an "underground lifeline" to ensure the normal operation of the overall urban functions. As my country's urbanization process continues to accelerate, the expansion and renovation of urban underground pipelines continues to increase. As of the end of 2016, the length of urban drainage pipes was 630,000 kilometers, of which the total length of pipes before 2000 exceeded 100,000 kilometers. Due to long-term use and disrepair of a large number of pipes, the current municipal pipe network is "running, leaking, dripping, leaking" and so on. Accidents are frequent and repairs are urgently needed. [0003] Trenchless pipeline repair technology is currently the main means of r...

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): C04B28/04
CPCC04B28/04C04B2201/10C04B2201/50C04B14/06C04B18/146C04B14/28C04B2103/302C04B24/38C04B14/104C04B2103/44C04B2103/0057C04B24/04C04B22/16C04B22/147C04B16/0633C04B22/143C04B14/4643C04B18/141C04B16/0625
Inventor 黄玉娟陈俊孔耀祖
Owner 武汉中地大非开挖研究院有限公司
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