超薄罩面纤维提升性能技术研究

Research on Technology of Improving Performance of Ultra-thin Overlay Fiber

摘要:

以广东省江罗高速公路预防养护工程为依托，对超薄罩面沥青混合料进行研究。为提升超薄罩面沥青混合料的路用性能，选定玻璃纤维粉材料作为核心添加剂使用，玻璃纤维粉具有重量轻、耐久性强、成本低等特性，且更为环保。将玻璃纤维粉分为0.02%、0.04%、0.06%、0.08% 4档不同掺量作为外掺物加入沥青混合料中。根据高速公路路用性能要求，选取高温车辙试验、水稳定性试验、渗水试验、抗滑试验进行材料性能影响因素检测试验，研究结果显示：玻璃纤维粉最佳掺量为0.04%，当掺量为0.04%时动稳定度到达峰值，提升了约12.42%；冻融劈裂抗拉强度比和残留稳定度分别提高了约7.72%和7.08%；渗水性能与抗滑性能试验结果也均满足相关规范技术要求。试验结果表明，适量玻璃纤维粉的掺入可以有效改善超薄罩面沥青混合料的路用性能，并为预防养护工程提供相关的研究数据及参考建议。

Abstract:

Relying on the preventive maintenance of Jiangluo Expressway in Guangdong Province， the ultra-thin overlay asphalt mixture is studied. To improve the pavement performance of ultra-thin overlay asphalt mixture， the glass fiber powder material is selected as the core additive for use. The glass fiber powder has the characteristics of light weight， strong durability and low cost， and is more environmentally friendly. The glass fiber powder is divided into 0.02%， 0.04%， 0.06% and 0.08%， and 4 different dosages are added into the asphalt mixture as an admixture. According to the performance requirements of expressway， the high-temperature rutting test， water stability test， water seepage test and anti-skid test are selected to detect the factors affecting material properties. The research results show that the optimal dosage of glass fiber powder is 0.04%. When the dosage is 0.04%， the dynamic stability reaches its peak， which is increased by about 12.42%. The freeze-thaw splitting tensile strength ratio and the residual stability are increased by about 7.72% and 7.08%， respectively. The test results of water permeability and anti-skid performance also meet the technical requirements of relevant specifications. The experimental results show that the addition of an appropriate amount of glass fiber powder can effectively improve the pavement performance of ultra-thin overlay asphalt mixture， and provide the relevant research data and reference suggestions for the preventive maintenance project.