Industry Reports
| Report No. | IP49(jot this number down to order) |
| Title | Design of Asphalt-Rubber Single Surface Treatments with Multilayered Aggregate Structure |
| Author(s) | Vallerga, B.A., Consulting Civil Engineer, CA, & Bagley, J.R., Arizona Refining Co. |
| Publisher | American Society for Testing & Materials |
| Pub. Date | 1980 |
| Pages | 9 pages |
| Keywords | surface treatment, stress-absorbing membrane, asphalt-rubber, asphalt, design, performance |
| Description | A newly developed asphalt-rubber materials with unique adhesive and rheological properties has made it possible to form highly elastic single surface treatments with a multilayered aggregate structure. Conventional asphalt distributor trucks are used to apply a heavy spread of the hot asphalt-rubber material on a prepared surface followed by the immediate embedment of aggregate chips into this cast-in-place membrane by conventional chip spreading and rolling equipment and procedures. A sufficient quantity of aggregate chips must be applied both to build up the multilayered aggregate structure and to provide a skid-resistant pavement surface. The composition and properties of the asphalt-rubber material are described together with procedures for constructing the surface treatment. Audit results are presented form an experimental field installation of a multilayered single surface treatment consisting of four test sections, where the rates of application of the asphalt-rubber membrane material ranged from 1.86 to 8.87 hot litre/m2 (0.41 to 1.96 hot gal/yd2) with corresponding aggregate retention rates of 13 to 37 kg/m2 (24 to 68 lb/yd2). Based on these audit results and experience gained from the observed performance of other field installations, a nomograph for designing such multilayered aggregate single-surface treatments has been formulated and is presented. The nomograph can be used to determine the rates of application of asphalt-rubber material and aggregate chips to obtain a desired thickness of surface treatment or, alternatively, to determine the spread rate of aggregate chips and thickness of the surface treatment for a specific rate of asphalt-rubber membrane application. |
| Postage | $ 2.00 : U.S. $ 2.20 : Canada/Mexico $ 2.40 : Rest of the World |
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