ABSTRACT

This study investigated the effect of the different mineral fillers and concentrations, film thicknesses on the bituminous mastic bond strength (BMBS). Moreover, the self-healing capabilities of different bituminous mastic compounds were assessed, where the effects of two types of high modulus additives of RW plast S and RW elast E on the self-healing of bituminous mastic were evaluated. It was found that filler concentration, due to the morphology of filler, has a great impact on the BMBS. Indeed, the more porosity, the more bitumen needed to fill the voids on the surface of filler particles that changes the thickness of free bitumen. Besides, the healing capability of the dense structure can be expected to be more than porous one. The change in the thickness of the free bitumen alters the healing mechanism of bituminous mastic. Exposing to the water helps the bitumen to make a strong bond that results in higher recovered bond strength in the long run. Regarding these issues, it was observed that the healing capability of River Filler (RF) is more than Dolomite Filler (DF).

摘要

本研究调查了不同矿物填料和浓度、薄膜厚度对沥青胶粘剂粘合强度 (BMBS) 的影响。此外，还评估了不同沥青胶料的自修复能力，评估了RW plast S和RW elast E两种高模量添加剂对沥青胶粘剂自修复的影响。研究发现，由于填料的形态，填料浓度对 BMBS 有很大影响。事实上，孔隙率越高，填充填料颗粒表面空隙所需的沥青就越多，这会改变游离沥青的厚度。此外，致密结构的愈合能力有望超过多孔结构。游离沥青厚度的变化改变了沥青胶泥的愈合机制。暴露在水中有助于沥青形成牢固的粘合，从长远来看会产生更高的恢复粘合强度。关于这些问题，据观察河流填料（RF）的愈合能力超过白云石填料（DF）。