Method for repairing concrete pavement by using virgin fiber cement-based repairing material

A technology of concrete pavement and primary fiber, which is applied to cohesive pavement paved on site, roads, roads, etc. It can solve the problems of poor interface bonding, poor deformation capacity, and damage to concrete pavement, and achieve excellent crack control ability , good mechanical properties, good integration effect

Pending Publication Date: 2019-09-17
FUZHOU UNIV
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two patents have the following three points of difference from this patent: First, compared with the above-mentioned traditional repair materials, the maximum crack width produced after repairing the pavement is reduced, but, because of the presence of gravel, the crack width remains the same. It is at the centimeter level, which is still far greater than the maximum crack width of 50 μm in this patent; second, because the price of cellulose fiber and polyvinyl alcohol fiber is much higher than t

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
  • Method for repairing concrete pavement by using virgin fiber cement-based repairing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for repairing concrete pavements using native fiber cement-based repair materials, comprising the following steps:

[0032] Step 1. According to the climate temperature and site conditions, design the optimal mix ratio of virgin fiber cement-based composite materials before the construction starts, and conduct experiments to verify the setting time, mechanical strength, fluidity and other indicators. The mix ratio is based on the actual situation Make minor adjustments. The proportion of raw fiber cement-based materials used is: water 280kg / m 3 ; Cement 310kg / m 3 ; fine sand 680kg / m 3 ; Fly ash 700kg / m 3 ; Virgin fiber 28kg / m 3 ;Polycarboxylate superplasticizer 15kg / m 3 ; Binder hydroxypropyl methylcellulose 0.18kg / m 3 ;

[0033] Step 2: Crushing the old cement concrete pavement, that is, breaking the whole cement concrete pavement into pieces at one time through multiple hammer heads or other types of impact equipment, so that the pavement can be transf...

Embodiment 2

[0049] A method for repairing concrete pavements using native fiber cement-based repair materials, comprising the following steps:

[0050] Step 1. According to the climate temperature and site conditions, design the optimal mix ratio of virgin fiber cement-based composite materials before the construction starts, and conduct experiments to verify the setting time, mechanical strength, fluidity and other indicators. The mix ratio is based on the actual situation Make minor adjustments. The proportion of raw fiber cement-based materials used is: water 290kg / m 3 ; Cement 320kg / m 3 ; fine sand 690kg / m 3 ; Fly ash 690kg / m 3 ; Virgin fiber 26kg / m 3 ;Polycarboxylate superplasticizer 12kg / m 3 ; Binder hydroxypropyl methylcellulose 0.16kg / m 3 ;

[0051] Step 2: Crushing the old cement concrete pavement, that is, breaking the whole cement concrete pavement into pieces at one time through multiple hammer heads or other types of impact equipment, so that the pavement can be transf...

Embodiment 3

[0067] A method for repairing concrete pavements using native fiber cement-based repair materials, comprising the following steps:

[0068] Step 1. According to the climate temperature and site conditions, design the optimal mix ratio of virgin fiber cement-based composite materials before the construction starts, and conduct experiments to verify the setting time, mechanical strength, fluidity and other indicators. The mix ratio is based on the actual situation Make minor adjustments. The proportion of raw fiber cement-based materials used is: water 280kg / m 3 ; Cement 310kg / m 3 ; fine sand 680kg / m 3 ; Fly ash 680kg / m 3 ; Virgin fiber 24kg / m 3 ;Polycarboxylate superplasticizer 10kg / m 3 ; Binder hydroxypropyl methylcellulose 0.15kg / m 3 ;

[0069] Step 2: Crushing the old cement concrete pavement, that is, breaking the whole cement concrete pavement into pieces at one time through multiple hammer heads or other types of impact equipment, so that the pavement can be transf...

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
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Elastic modulusaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for repairing a concrete pavement by using a virgin fiber cement-based repairing material. The method comprises: before construction, carrying out a mixing ratio experiment on a cement-based composite material, and carrying out experimental verification to obtain the optimal mixing ratio of the cement-based composite material; carrying out rubblization on an old cement concrete pavement, wherein the whole cement concrete pavement plate is broken into broken blocks at one time by impact equipment, such that the pavement plate is converted from the whole working state to the granule-based combination body working state; after breaking the pavement, compacting to ensure the stability and the flatness of the breaking layer, such that the conversion of the old concrete plate from the old surface layer plate to the new pavement base layer is achieved; preparing a virgin fiber cement-based composite material according to the optimal mixing ratio of the cement-based composite material, pouring, and carrying out vibrating flattening; and after 1 h, covering with a geotextile, and carrying out watering curing. According to the present invention, with the method, the damaged pavement is repaired by using the material, such that the plate breaking and impact fracture phenomenon of the concrete pavement due to the brittleness can be improved so as to avoid the occurrence of wide cracks and improve the durability of the road surface.

Description

technical field [0001] The invention relates to a method for repairing concrete pavements using raw fiber cement-based repair materials. Background technique [0002] Cement concrete pavement is widely used because of its low price and abundant reserves of raw materials, simple preparation process and durability. However, after a certain number of years of service, local diseases such as cracks, holes, potholes, corner fractures, and surface peeling are prone to appear under the coupled effects of environmental erosion and driving loads. If these local diseases are not repaired effectively and in time, the disease will Further aggravation, ultimately affecting driving comfort, safety and service life of the road surface. [0003] The existing cement-based repair materials for cement concrete pavement diseases mainly include the following categories: 1) Ordinary cement concrete repair materials have poor cohesiveness and large shrinkage, resulting in poor durability of the 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): C04B28/04E01C7/14C04B111/72
CPCC04B28/04E01C7/147C04B2111/0075C04B2111/72C04B24/383C04B2103/302C04B18/08C04B14/06C04B18/248
Inventor 陈伟宏陈世伟刘成军
Owner FUZHOU UNIV
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