A laboratory study into factors affecting stone mastic asphalt performance

There has been considerable interest in stone mastic asphalt in Australia and elsewhere. Two of the distinguishing features of stone mastic asphalt are the relatively high proportion of binder mastic and the establishment of a stone-on-stone aggregate skeleton. Binder mastic has been characterised in the past by a simple binder/filler ratio but with the greater proportion of binder mastic in stone mastic asphalts, this simple parameter does not fully explain the role of the mastic. The binder mastic can have a profound effect on stone mastic asphalt performance. Free binder ratio and fixed binder ratio are shown to be closely related to the mastic viscosity and are examined in the laboratory for a range of added fillers. The aggregate skeleton of stone mastic asphalts is commonly described as a stone-on-stone skeleton highlighting that the large proportion of coarse sized aggregate particles carry a substantial share of the imposed loads. There have been numerous studies in developing methods to ensure that this type of aggregate skeleton is developed and the paper examines a dilation procedure (based upon the change in resilient modulus in laboratory compacted specimens). (a) For covering abstract of the conference see E218387.

Corporate Authors:
HALLMARK CONFERENCE AND EVENTS

PO BOX 84
HAMPTON, Australia 3188
Authors:
- ALDERSON, A
Publication Date: 2009-10

Language

English

Media Info

Pagination: 15P (DAY 2, SESSION 3)
Monograph Title: Australian Asphalt Paving Association thirteenth international flexible pavements conference, Sunday 11th - Wednesday 14th October, Surfers Paradise, Queensland, Australia

Subject/Index Terms

TRT Terms: Bituminous mixtures; Mastic asphalt; Pavements; Performance
Subject Areas: Highways; Pavements; I31: Bituminous Binders and Materials;

Filing Info

Accession Number: 01153056
Record Type: Publication
Source Agency: ARRB
Files: ITRD, ATRI
Created Date: Mar 23 2010 9:14AM