Development of skid resistant hot asphalt mixtures by blending aggregates from different sources
The production of HMA in Israel relies on basalt and dolomite aggregates. The Israeli specifications require exclusive usage of basalt aggregate for the wearing course in major highways owing to its superior polishing resistance (PR). Extensive usage of basalt aggregate caused a shortage, resulting in price rises and project delays. The Israeli National Roads Company (INRC) initiated research to test the possibilities of partially replacing some of the basalt with dolomite, while still maintaining proper skid resistance (SR). The research phases were: 1. Literature survey indicating that controlled blending of high and low PR aggregates is an accepted procedure among road authorities internationally. 2. Extensive laboratory tests of PR (mainly PSV), establishing the feasibility of reducing the percentage of Basalt in the HMA by 40 per cent. 3. Constructing a 4 km test section with various HMA mixtures composed of basalt, dolomite and controlled basalt-dolomite mixtures (black and white, 'zebra' (Z-AC) appearance). 4. Field performance monitoring proving that the SR of the Z-AC mixtures was superior to the dolomite's and close to basalt's. Based on these findings, the Z-AC mixtures were introduced to the INRC's specifications and design guidelines.
- Record URL:
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Authors:
- Ravina, A
- Nesichi, S
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Conference:
- International Surface Friction Conference, 3rd, 2011
- Location: Gold Coast Queensland, Australia
- Date: 2011-5-15 to 2011-5-18
- Publication Date: 2011-5
Language
- English
Media Info
- Pagination: 15p
- Monograph Title: 3rd International Road Surface Friction Conference, Gold Coast, Queensland, 15-18 May 2011
Subject/Index Terms
- TRT Terms: Basalt; Construction; Costs; Field tests; Mix design; Pavement design; Pavement performance; Temperature; Tests
- Uncontrolled Terms: Construction costs; Design guide; Hot mix; Materials technology (asphalt/bitumen/concrete)
- Geographic Terms: Israel
- ITRD Terms: 6226: In situ; 3031: Skid resistance
- Subject Areas: Construction; Highways; Pavements; I23: Properties of Road Surfaces; I30: Materials;
Filing Info
- Accession Number: 01344013
- Record Type: Publication
- Source Agency: ARRB
- Files: ITRD, ARRB, ATRI
- Created Date: Jul 13 2011 11:50AM