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Glass fiber geogrid (GFG) is one of the most commonly used materials to mitigate reflective cracks in semi-rigid base asphalt pavement, but there are still some defects in the application of GFG at present. Therefore, GFG was optimized from the perspective of coating treatment. In this paper, the coating materials were firstly optimized from a variety of compounded emulsions (CE) composed of polymer and emulsified asphalt (EA). Then, the properties of the CE and the effect of CE on performances of GFG were studied. The results show that the weighted average particle size, contact angle, viscosity and coating uniformity of polyacrylate compound emulsion (PA-CE) are smaller, higher, higher and better than those of styrene-butadiene compound emulsion (SB-CE), respectively. The GFG impregnated by PA-CE (PA-GFG) has better strength, folding resistance and durability than the GFG impregnated by SB-CE (SB-GFG) and GFG impregnated by EA (EA-GFG). The interlaminar bonding performances and resistance to reflective cracks from flexural-tensile loading of PA-GFG and SB-GFG are not significantly different, while the resistance to reflective cracks from shear loading of PA-GFG is higher than that of SB-GFG. • Glass fiber geogrid was optimized from the perspective of coating treatment. • Coating materials were optimized from compounded emulsions. • Performances of compounded emulsion were tested. • Effect of coating materials on performances of glass fiber geogrid was studied. [ABSTRACT FROM AUTHOR]

To improve the low-temperature and anti-fatigue performances of the bridge deck pavement and decrease its cost, an unsaturated polyester resin (UPR) modified asphalt mixture is put forward in this paper. First the optimum formula of UPR modified asphalt is determined through several tests. Second the ductility, bending beam rheometer (BBR), dynamic shear rheometer (DSR) and tensile tests are conducted for matrix asphalt, and SBS, epoxy and UPR modified asphalts. Finally, Marshall, rutting, low temperature bending, freeze-thaw splitting and fatigue tests are conducted for their mixtures. Test results show that the laboratory performances of UPR modified asphalt mixture are more excellent than those of SBS modified asphalt mixture and have advantages over those of epoxy modified asphalt mixture in low-temperature crack resistance, water stability and anti-fatigue ability. The maximum flexural-tensile strain, stripping inflection point and fatigue life of UPR modified asphalt mixture are 2.54, 1.25 and 1.08 times of those of epoxy modified asphalt mixture, respectively. Whereas the cost of UPR modified asphalt is only 62% of that of epoxy modified asphalt. Although the BPA will have a certain impact on the health of BPA unsaturated polyester resins production workers and construction workers, this impact can be controlled by limiting BPA concentrations within reasonable ranges and taking effective protective measures. [ABSTRACT FROM AUTHOR]