|Table of Contents|

Functional microstructure of high elastic block copolymer and modification effect on asphalt(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年3期
Page:
112-
Research Field:
道路工程(道路交通功能材料专刊)
Publishing date:

Info

Title:
Functional microstructure of high elastic block copolymer and modification effect on asphalt
Author(s):
SUN Xiao-long1;  ZHANG Yi-kang1;  PENG Qin-yuan1;  YUAN Jun-shen1; CANG Zhi2;  LIU Zhi-sheng3; 4
(1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006,Guangdong, China; 2. Datong North Expressway Branch, Shanxi Transportation Holding Group Co., Ltd,Datong 037300, Shanxi, China; 3. Department of Scien
Keywords:
road engineering;  modified asphalt;  block copolymer;  PUA;  functional structure
PACS:
U414
DOI:
10.19721/j.cnki.1671-8879.2022.03.011
Abstract:
Based on the excellent load bearing and dispersing characteristics of PUA(polyurea elastomer)materials, PUA particles and silty materials were prepared to achieve its modification effect on asphalt pavement materials in this article. The typical functional microstructures in different sections of PUA particles were identified and characterized to clarify the distribution characteristics of typical structures. The particle size composition and characteristics of the PUA powder material were analyzed to investigate the damage effect of the low-temperature fine grinding process on the functional structures of the PUA material. The influence of PUA powder materials with different particle sizes on the rheological properties of asphalt was studied and determined. The research results show that the particle size distribution of different PUA silty materials presented the normal distribution characteristic, and the particle size composition of different PUA materials had the intersection. The spherical structures of different diameters in the scanning micro-area existed independently in the material section, and the spherical structures formed the triangular distribution in specific zone. The spherical structures in the micro morphology of 0.15 and 0.075 mm PUA particles are incomplete, and some obvious cutting failures appeared. PUA materials could reduce the cumulative deformation of asphalt materials suffering from repeated loads and improve the elastic recovery ability of asphalt after being loaded.2 tabs, 13 figs, 30 refs.

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Last Update: 2022-07-01