|Table of Contents|

Effect of SBS and SBR latex on evaporative residue property of colored emulsified 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:
62-70
Research Field:
道路工程(道路交通功能材料专刊)
Publishing date:

Info

Title:
Effect of SBS and SBR latex on evaporative residue property of colored emulsified asphalt
Author(s):
CHEN Hua-xin1;  CAO Xia-fang1;  XU Peng2;  WU Yong-chang1
(1. School of Materials Science and Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2.Xi'an Highway Research Institute, Xi'an 710065, Shaanxi, China)
Keywords:
road engineering;  colored emulsified asphalt;  SBS latex;  SBR latex;  rheological property
PACS:
U414
DOI:
10.19721/j.cnki.1671-8879.2022.03.006
Abstract:
In order to investigate themodification effect of SBS and SBR latex on colored emulsified asphalt, different content of SBS and SBR latex modified colored emulsified asphalt(MEA)were prepared by emulsification before modification. The effects of differentlatex on evaporative residue performance of MEAs were studied, by measuring the penetration,softening point and force length of modified colored emulsified asphalt with different dosages. Thedynamic shear rheological test(DSR)was used to test the complex modulus G*, phase angle δ and rut factor G*/sin(δ) at different temperatures, and to analyze the rheological characteristics ofevaporative residues of colored emulsified asphalt at different mixing levels. The high-temperaturedeformation resistanceand low-temperature viscosity-toughness of the evaporation residue of MEAs under differentdosages were studied with rutting factor and force ductility as the main indexes. The modificationmechanism of SBS and SBR latex on MEAs was analyzed by infrared spectrum analysis. Theresults show that when the latex content(mass fraction, the same below)is low(3%), the performance of colored emulsifiedasphalt has no obvious influence, and the viscosity-toughness of MEAs are significantly improvedwith the increase of latex content. The ductility of evaporation residue of SBR MEA isincreased by 15% to 17%, and the softening point is increased by approximately 5% than thatof SBS MEA under the same dosage. With the increase of temperature and latex content, theelastic component of MEAs increases, the phase angle decreases, the component of C9 petroleumresin decreases, and the complex modulus and rutting factor decrease. With functional groupanalysis, the modification effect of SBS and SBR latex on MEAs is mainly physical modificationas SBR latex has stronger modification effect than that of SBS latex. When used in color micro-surfacing, the recommended addition of SBR latex is 9%.4 tabs, 8 figs, 31 refs.

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Last Update: 2022-07-01