Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Construction method of large-particle-size cement regenerated base pavement structure

A technology of pavement structure and construction method, which is applied in the direction of roads, roads, and cohesive pavement paved on site, etc., which can solve the problems of low anti-heavy load performance, subsidence, and easy cracking of flexible base layers, and achieve excellent bearing capacity , improve composition, reduce the effect of horizontal shifting

Inactive Publication Date: 2022-02-11
西安长大公路养护技术有限公司
View PDF17 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the defects of reflective cracks existing in the existing pavement, the problem of low heavy load resistance, and the flexible base is prone to network cracking and sinking, the present invention provides a construction method for the pavement structure of the large particle size cement regenerated base

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
  • Construction method of large-particle-size cement regenerated base pavement structure
  • Construction method of large-particle-size cement regenerated base pavement structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] This embodiment is a two-lane provincial road reconstruction project, the old road is a cement concrete pavement with a width of 7m, and the asphalt concrete pavement is used after the transformation.

[0039] After comprehensive treatment of the old cement pavement panel, it will be used as a cushion layer for the new pavement structure layer, and then 16-20cm6% cement stabilized graded macadam base + 18cm large particle size cement regeneration base + 8cmATB30 modified asphalt macadam underlayer + 4cm AC-13C imported asphalt concrete (diabase) upper layer.

[0040] The 18cm large particle size cement regeneration base uses large particle size gravel with a nominal particle size of 37.5 to 63 as the main aggregate; after milling the old asphalt surface layer, sieve out the milling material with a particle size of less than 16mm, and use the The old road asphalt pavement milling material with P.C32.5R cement and water is mixed in the recycling equipment to form the ceme...

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
Login to View More

Abstract

The invention relates to a construction method of a large-particle-size cement regenerated base pavement structure. The problems that an existing pavement has the defect of reflection cracks and is low in heavy load resistance, and a flexible base layer is prone to net cracks and sinking are solved. According to the technical scheme, the building material comprises a main aggregate, a filling material and a caulking material. The method comprises the following steps: paving a main aggregate, rolling the main aggregate, paving a filling material, uniformly mixing the filling material and the main aggregate, conducting rolling, spreading a caulking material, and conducting rolling and preserving for 7 days. The rebound modulus is about 1200 MPa, the main aggregate is large-particle-size broken stone, the nominal particle size of the main aggregate is 53-73 mm or 37.5-63 mm, the filling material and the caulking material adopt an on-site cement cold recycled asphalt surface layer milling material, the cement cold recycled asphalt surface layer milling material is formed by mixing an old road asphalt pavement structure layer milling material, cement and water in regeneration equipment, the maximum particle size of the cement cold recycled asphalt surface layer milling material is smaller than 16 mm, the continuous grading curve requirement is met, the cement dosage range is 5-12%, and the 7d unconfined compressive strength representative value is not lower than 3 Mpa.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to a construction method of a large particle size cement regenerated base course pavement structure. Background technique [0002] In the treatment of large and medium-sized highway repair and maintenance projects in my country, milling and planing asphalt surface layers are often used to excavate and replace the original base and subbase, and to reinforce and reinforce them. It is determined whether to add a new base according to the design strength, and then re-pave the surface. This kind of structural maintenance plan needs to discard a large amount of milling materials, causing environmental pollution, and the design of the new base is often considered to be more water-stable. Although the water-stable base has high strength, high modulus, and strong board performance, its temperature shrinkage, Dry shrinkage is large, easy to crack, and has no self-healing ability, so...

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): E01C7/18
CPCE01C7/18E01C7/187
Inventor 吴超凡李会安陈燕琴
Owner 西安长大公路养护技术有限公司
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
Eureka Blog
Learn More
PatSnap group products