Latex improvement of recycled asphalt pavement
Abstract
The performance of a single unmodified milled recycled asphalt concrete was compared to milled asphalt concrete modified by addition of three types of rubber latex. Latex was added at 2, 3, 5, and 8 percent latex by weight of asphalt in the asphalt concrete. Lattices used were a styrene butadiene (SBR), a natural rubber (NR), an acrylonitrile butadiene (NBR), and four varieties of out of specification SBR lattices. Marshall tests, while indecisive, showed a modest improvement in properties of SBR and NR added material at 3 and 5 percent latex. Addition of NBR latex caused deterioration in Marshall stability and flow over that of control. Repeated load tests were run using the indirect tensile test, analyzed by the VESYS program, which computes life of pavements. Repeated load tests showed improvement in asphalt concrete life when 3 and 5 percent SBR was added. Improvement was also shown by the out of specification SBR.
- Publication:
-
Final Report Akron Univ
- Pub Date:
- August 1982
- Bibcode:
- 1982akuo.rept.....D
- Keywords:
-
- Asphalt;
- Concretes;
- Failure Analysis;
- Latex;
- Life (Durability);
- Pavements;
- Plastic Deformation;
- Viscoelasticity;
- Butadiene;
- Computer Programs;
- Curing;
- Cyclic Loads;
- Ductility;
- Performance Tests;
- Tables (Data);
- Temperature Effects;
- Engineering (General)