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

Quick-setting and rapid-hardening road pavement repair concrete with super-early strength and preparation method thereof

A road surface repair and concrete technology, applied in the field of building materials, can solve the problems of high content of gelling components, high cost, shrinkage rate, and mechanical properties that cannot meet the ideal requirements, and achieve low cost, good mechanical properties, and reduced maintenance costs. Effect

Inactive Publication Date: 2017-06-13
GUANGDONG UNIV OF TECH +1
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quick-setting, fast-hardening, super-early-strength pavement repair concrete in the prior art still has the problem of high cost due to the high content of gelling components, and the shrinkage rate and mechanical properties cannot meet the ideal 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
  • Quick-setting and rapid-hardening road pavement repair concrete with super-early strength and preparation method thereof
  • Quick-setting and rapid-hardening road pavement repair concrete with super-early strength and preparation method thereof
  • Quick-setting and rapid-hardening road pavement repair concrete with super-early strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A quick-setting, fast-hardening and ultra-early-strength pavement patching concrete, which is composed of cementitious material, river sand, crushed stone, cement, initiator and accelerator;

[0047] According to the unilateral dosage kg / m 3 In standard terms, the dosage of each component is as follows: 320-350 cementitious material, 730-790 river sand, 920-960 crushed stone, 250-350 cement, 3-4 initiator, 1.5-2 accelerator.

[0048] Among them, the gelling material is 191C unsaturated polyester resin, the solid content is 63-69%, and the liquid viscosity is 400-600MPa·s. The unsaturated polyester resin used in the quick-setting, fast-hardening, super-early-strength pavement repair concrete of the present invention is formed by polycondensation of unsaturated dibasic acid diol or saturated dibasic acid unsaturated diol with ester bonds and A linear polymer compound with unsaturated double bonds is a thermosetting resin that can be cured at room temperature and molded und...

Embodiment 2

[0070] A quick-setting, fast-hardening, super-early-strength pavement repair concrete, other features are the same as in Example 1, the difference is that the following equipment is used, according to the unilateral dosage kg / m 3 According to the standard, the dosage of each component is as follows: cementitious material 330-350, river sand 730-760, gravel 920-960, cement 250-330, initiator 3.3-3.5, accelerator 1.7-1.8.

[0071] The cementitious material content of the fast-setting, fast-hardening, super-early-strength pavement repair concrete is 330-350 kg / m 3 , low cementitious material content, low cost, good mechanical properties and small shrinkage. By checking its performance, the 6-hour compressive strength is not less than 30MPa, the total shrinkage rate is 0.3-0.5‰, the 7d compressive strength is higher than 60MPa, and the 28d compressive strength is higher than 72.6MPa. The concrete of the present invention has low requirements on road maintenance conditions, and so...

Embodiment 3

[0073] A quick-setting, fast-hardening, super-early-strength pavement patching concrete, single square (m 3 ) Concrete components are as follows: 330kg of unsaturated polyester resin, 920kg of 5-10 crushed stone, 750kg of river sand, 300kg of cement, 3.3kg of initiator, and 1.7kg of accelerator.

[0074] After the materials are ready, follow the steps below:

[0075] The first step: dry the gravel, sieve the gravel, and treat the road surface to be repaired at the same time;

[0076] Step 2: Mix concrete 100L (0.1m 3 ), calculate and weigh the mass of each component, unsaturated polyester resin 33kg, river sand 75kg, gravel 92kg, cement 30kg, initiator 300ml, accelerator 150ml.

[0077] The quality of each component of crushed stone is shown in Table 1:

[0078] Table 1

[0079] Particle size (mm) The mass of each component of single concrete crushed stone (㎏) 31.5-26.5 11.5 26.5-19 20 19-16 9.5 16-9.5 25 9.5-4.75 26

[0080] Step ...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a quick-setting and rapid-hardening road pavement repair concrete with super-early strength and a preparation method thereof. The quick-setting and rapid-hardening road pavement repair concrete is prepared from the following raw materials in unit usage amount (kg / m<3>): 320 to 350 parts of gel material, 730 to 790 parts of river sand, 920 to 960 parts of crushed stone, 250 to 350 parts of cement, 3 to 4 parts of initiator, and 1.5 to 2 parts of accelerant. The quick-setting and rapid-hardening road pavement repair concrete with super-early strength has the advantages that the content of gel material is 320 to 350kg / m<3>; the content of gel material is low, the cost is low, the mechanical property is better, the shrinkage rate is little, the 6h compressive strength is no lower than 30MPa, the total shrinkage rate is 0.03 to 0.05%, the 7d compressive strength is higher than 60MPa, the 28d compressive strength is higher than 72.6MPa, and the requirement on road curing conditions is low.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a quick-setting quick-hardening super-early-strength pavement repair concrete and a preparation method thereof. Background technique [0002] Quick-setting, fast-hardening, ultra-early-strength pavement repair concrete refers to concrete whose cubic compressive strength is greater than 30MPa after curing for 6 hours. [0003] Quick-setting, fast-hardening, super-early-strength pavement repair concrete has the advantages of rapid setting and hardening and high early strength, which can quickly repair the pavement, reduce the time of road closure and maintenance, reduce traffic congestion caused by road repair, and reduce the number of repeated repairs. Its technical research It has become one of the technologies that the road maintenance industry focuses on. [0004] With the development of national highways, urban traffic is increasingly developed, cracks, potholes an...

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 Applications(China)
IPC IPC(8): C04B28/04C04B24/28
CPCC04B28/04C04B24/283C04B2111/0075C04B2201/05C04B14/068C04B14/02C04B20/0096C04B24/008C04B24/04
Inventor 杨飞陈德刘锋吕建兵袁朝志黄国文黄绿岸张东国殷子晴
Owner GUANGDONG UNIV OF 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