Poor bonding between asphalt layers cause many distresses, and the most typical problem is the slippage failure. This failure usually occurs when there are exists insufficient bond between the interfaces of the two layers in contact. Therefore, sufficient tack coat is needed to provide greater bonding strength between pavement layers to be able to withstand traffic and environmental stresses. Thus, this study is conducted to evaluate the influence of tack coat, application rates, and layer thickness on the interface bond strength between hot mix asphalt and stone mastic asphalt. A total of three tack coat materials have been used, which are RS-1K and RS-2K and RS-2KL. These tack coat materials were applied at three different application rates, 0.25 l/m², 0.40 l/m² and 0.55 l/m² which represent low, medium and high application rates respectively in accordance with the JKR specification. Direct shear test has been conducted at shearing rate 1 mm/min and shearing platens 5 mm gap. Analysis obtained shows interface shear strength increased as layer thickness and application rate increase. High viscosity of tack coat produced high interface shear strength than low viscosity tack coat
展开▼
机译:沥青层之间的粘结不良会引起许多麻烦,最典型的问题是滑移破坏。当接触的两层界面之间粘结不充分时,通常会发生这种故障。因此,需要足够的粘性涂层以在路面层之间提供更大的粘结强度,以能够承受交通和环境压力。因此,本研究旨在评估粘性涂料,施工速率和层厚度对热拌沥青与石乳胶沥青之间的界面粘结强度的影响。总共使用了三种粘性涂层材料,分别是RS-1K和RS-2K和RS-2KL。这些粘性涂料材料以0.25 l /m²,0.40 l /m²和0.55 l /m²的三种不同施用率施用,根据JKR规范分别代表低,中和高施用率。以1 mm / min的剪切速率和5 mm的剪切压板间隙进行了直接剪切测试。获得的分析表明,界面剪切强度随着层厚度和施加速率的增加而增加。高粘度的粘结层比低粘度的粘结层具有更高的界面剪切强度
展开▼