Kim Kyungnam, Le Tri Ho Minh
Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Goyang-si 10223, Gyeonggi-Do, Republic of Korea.
Faculty of Civil Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh Street, District 4, Ho Chi Minh City 70000, Vietnam.
Polymers (Basel). 2023 Jun 27;15(13):2830. doi: 10.3390/polym15132830.
This study addresses the challenges of overlaying old concrete pavement with asphalt by introducing a new trackless tack coat material containing polymer. The aim is to enhance the durability of asphalt concrete overlay pavement on old cement concrete pavement. It contributes to the development of improved construction techniques for pavement rehabilitation and highlights the need for reliable adhesion performance evaluation based on different spray amounts and surface conditions. Additionally, to evaluate the effect of the adhesion performance based on the spraying amount, a tensile adhesion test was conducted by applying spray amounts of 0.30, 0.45, and 0.60 l/m on different surface conditions. The basic and adhesion performances of the polymer-modified tack coat material are evaluated through direct tensile and shear bond strength tests. The test outcomes demonstrated that the newly developed polymer-modified tack coat material had considerably greater adhesion strength compared to the traditional rapid-setting products. Its adhesive strength was 1.68 times higher on concrete and 1.78 times higher on asphalt. The new trackless tack coat material exhibited an adhesion performance of 1.05 MPa in direct tensile strength at 0.45 l/m, which was 1.21 times higher than the rapid-setting tack coat. Results also confirmed that the new tack coat material exhibits values 1.90 times greater than the conventional rapid-setting tack coat material in shear bond strength, respectively. By simulating the process of separation and re-adhesion of pavement layers caused, the new tack coat material shows a tensile adhesion strength of 63% of the original state, which is advantageous for securing the durability of the pavement. Overall, the newly developed polymer-modified trackless tack coat has been shown to effectively enhance the adhesion performance between pavement layers without process delay, highlighting the potential of the new tack coat material to enhance the durability of asphalt concrete overlay pavement on old cement concrete pavement.
本研究通过引入一种含聚合物的新型无轨粘结层材料，来应对旧水泥混凝土路面加铺沥青所面临的挑战。目的是提高旧水泥混凝土路面上沥青混凝土加铺层路面的耐久性。它有助于改进路面修复施工技术的发展，并突出了基于不同喷洒量和表面状况进行可靠粘结性能评估的必要性。此外，为了评估基于喷洒量的粘结性能效果，在不同表面状况下分别以0.30、0.45和0.60 l/m的喷洒量进行了拉伸粘结试验。通过直接拉伸和剪切粘结强度试验对聚合物改性粘结层材料的基本性能和粘结性能进行了评估。试验结果表明，新开发的聚合物改性粘结层材料相比传统速凝产品具有显著更高的粘结强度。其在混凝土上的粘结强度高1.68倍，在沥青上高1.78倍。新型无轨粘结层材料在0.45 l/m的喷洒量下直接拉伸强度的粘结性能为1.05 MPa，比速凝粘结层高1.21倍。结果还证实，新型粘结层材料的剪切粘结强度值分别比传统速凝粘结层材料高1.90倍。通过模拟路面层间分离和重新粘结的过程，新型粘结层材料的拉伸粘结强度为原始状态的63%，这有利于确保路面的耐久性。总体而言，新开发的聚合物改性无轨粘结层已被证明能有效提高路面层间的粘结性能且无工艺延迟，突出了新型粘结层材料提高旧水泥混凝土路面上沥青混凝土加铺层路面耐久性的潜力。
