|Table of Contents|

Road performance of granite asphalt mixture(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2010年02期
Page:
6-11
Research Field:
道路与铁道工程
Publishing date:
2010-04-20

Info

Title:
Road performance of granite asphalt mixture
Author(s):
PENG Yu-hua1;  LIU Hui-xing2
1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Yunnan Highway Engineering Supervision and Consultancy Company, Kunming 650021, Yunnan, China
Keywords:
pavement material;  granite asphalt mixture;  road performance;  anti-stripping agent
PACS:
U414.75
DOI:
-
Abstract:
The adhesion between granite aggregate and asphalt was evaluated by extending the boiling time and adding several kinds of anti-stripping agents. Taking the surface layer of granite asphalt mixture as the research objective, minor void volume was designed based on the target of water damage, and some tests including Marshall stability test, wheel rutting test, water stability test, accelerating aging test and Cantabro test were conducted under the conditions of adding MeadWestvaco, PA-1 and no adding anti-stripping agent. Test result shows that contrastedwith no adding anti-stripping agent, granite asphalt mixture's stability, dynamic stability, residue stability and freeze-thaw splitting rate increase by 39.8%, 42.1%, 13% and 16% respectively, and its flying shards loss decrease by 4.4% in the condition of adding MeadWestvaco. While granite asphalt mixture's stability, dynamic stability, residue stability and freeze-thaw splitting rate increase by 14%, 22.9%, 8% and 12% respectively, and its flying shard loss decrease by 2.9% when adding PA-1. The technical indices of granite asphalt mixtures after accelerating aging test come up to the specifications when adding two kinds of anti-stripping agents. The study indicates that adding anti-stripping agent with good thermal stability is the key point to improve the road performance of the mixture, and the effect of MeadWestvaco is superior to that of PA-1. The way that mineral powder is replaced by 2% cement cannot fully meet the performance need of granite asphalt mixture. 7 tabs, 4 figs, 15 refs.

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Last Update: 2010-04-20