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

Seamless expansion joint material adopting lime powder modified asphalt mortar of seamless expansion joint material and preparation method thereof

A modified asphalt, seamless expansion technology, applied in the field of road construction materials and engineering, can solve the problems of insufficient cohesiveness of the original pavement structure, increased overload, high temperature transition, etc.

Active Publication Date: 2021-05-28
浙江省交通运输科学研究院 +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a series of problems in the existing bridge expansion joint structure: vehicle jumping aggravates bridge damage, overloading aggravates settlement, water leakage and chlorine salt corrosion of bridge concrete materials, dust and garbage filling expansion joints, and increased replacement costs
The key to the service performance of bridge deck seamless expansion joints lies in the quality of the mixture. Various materials have been developed for seamless expansion joints at home and abroad. The most widely used seamless expansion joint materials on the market are modified asphalt elastic concrete and There are two kinds of polyurethane elastic concrete. It is found that the typical defects of seamless expansion joint materials are low temperature cracking, high temperature passing, and insufficient adhesion with the original pavement structure.

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
  • Seamless expansion joint material adopting lime powder modified asphalt mortar of seamless expansion joint material and preparation method thereof
  • Seamless expansion joint material adopting lime powder modified asphalt mortar of seamless expansion joint material and preparation method thereof
  • Seamless expansion joint material adopting lime powder modified asphalt mortar of seamless expansion joint material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 622 parts of wide temperature range modified asphalt, 746 parts of lime powder, and 7200 parts of aggregate.

[0039] The PG classification of the wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0040] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0041] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm3 , The water absorption rate is 0.6-0.8%.

[0042] In this embodiment, the preparati...

Embodiment 2

[0055] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 687 parts of wide temperature range modified asphalt, 825 parts of lime powder, and 7200 parts of aggregate.

[0056] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0057] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0058] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0059] In this embodiment, the preparation...

Embodiment 3

[0072] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 753 parts of wide temperature range modified asphalt, 903 parts of lime powder, and 7200 parts of aggregate.

[0073] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0074] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0075] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0076] In this embodiment, the preparation...

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
Softening pointaaaaaaaaaa
Extensibilityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a seamless expansion joint material adopting lime powder modified asphalt mortar and a preparation method of the seamless expansion joint material. The seamless expansion joint material comprises the following raw materials in parts by weight: 622-753 parts of wide temperature range modified asphalt, 746-903 parts of lime powder and 7200 parts of aggregate. The components, the proportion and the preparation process of the seamless expansion joint material are designed, so that the seamless expansion joint material has good high-temperature rutting resistance and low-temperature bending resistance and can meet the requirements of deformation and load complex working conditions in high and low temperature environments; the seamless expansion joint material of the lime powder modified asphalt mortar is prepared in a pre-mixing and layered pouring mode, so that the mixture is of a suspension compact structure, the aggregate plays a role in a framework, the asphalt mortar plays roles in bonding and expansion deformation, the high-temperature deformation resistance and the low-temperature cracking resistance are excellent, and the seamless expansion joint material can be applied to bridge expansion joint structures with medium and small spans.

Description

technical field [0001] The invention relates to the field of road building materials and engineering, in particular to a seamless expansion joint material and a preparation method thereof. Background technique [0002] Bridge expansion joints are generally set between the bridge decks of two adjacent spans of the bridge or between the bridge girder end and the back wall of the abutment. Freely stretch and deform. There are a series of problems in the existing bridge expansion joint structure: vehicle jumping aggravates bridge damage, overloading aggravates settlement, water leakage and chlorine salt corrosion of bridge concrete materials, dust and garbage filling expansion joints, and increased replacement costs. [0003] The seamless expansion joint can ensure the continuity of the bridge pavement, eliminate the jumping problem caused by the discontinuity of the existing expansion joint structure, and improve the integrity and durability of the structure. Its superior perf...

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): C04B26/26
CPCC04B26/26C04B2111/0075C04B2111/00672C04B22/064C04B14/14
Inventor 周文静程沁灵迟凤霞韩博孙艺涵
Owner 浙江省交通运输科学研究院
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