Technology Development and Demonstration of Grit Assisted Patch (GAP): Improvement and Field Test

Potholes on roads are a common problem in cold areas. These potholes are potentially a dangerous hazard on the roadways if they are not quickly repaired. Cold mix asphalt is widely used as a mainstream repair material but has weaknesses such as poor durability, potential environmental pollution, and high application temperature. On the other hand, many wastewater reclamation byproducts such as grit at water resource recovery facilities (WRRFs) are directly landfilled instead of being reused. Therefore, a new patch material using grit as an additive was proposed and named grit assisted patch (GAP) which is based on the matrix of chemically bonded phosphate ceramics (CBPC). The goals of the proposed research are 1) to improve the GAP properties; 2) to characterize the practical properties of GAP; 3) to evaluate the GAP performance on traffic roads; 4) to compare greenhouse gas emissions between GAP and conventional patches; and 5) to refine the economic analysis.