原文传递
UNDERSTANDING ASPHALT MASTIC BEHAVIOR THROUGH MICROMECHANICS (WITH DISCUSSION AND CLOSURE).
| 题名： | UNDERSTANDING ASPHALT MASTIC BEHAVIOR THROUGH MICROMECHANICS (WITH DISCUSSION AND CLOSURE). |
| 作者： | Buttlar-WG; Bozkurt-D; Al-Khateeb-GG; Waldhoff-AS; Shashidhar-N (Discusser); Shenoy-A (Discusser) |
| 关键词： | MASTIC-ASPHALT; MECHANICAL-PROPERTIES; MICROMECHANICS-; MINERAL-FILLERS; PHYSICOCHEMICAL-PROPERTIES; STIFFNESS- |
| 摘要： | The mechanical properties of asphalt-mineral filler mastics have long been known to significantly influence the overall performance of paving mixtures. However, reinforcement mechanisms associated with the presence of fillers in asphalt mastics are not well understood. Particulate composite micromechanical models are shown to be a powerful tool for separating various reinforcing mechanisms in asphalt mastics, including volume filling, physiochemical, and particle-interaction reinforcement. The generalized self-consistent scheme model is shown to predict very reasonable baseline reinforcement levels for asphalt mastics, and simplified prediction tools are presented as an alternative to the cumbersome micromechanical solution. An experimental program was conducted to evaluate micromechanical predictions of mastics properties over a broad range of temperatures and filler concentrations. A new equivalent rigid layer modeling technique was developed, which suggests that stiffening effects observed in mastics beyond those due to volume filling may be largely explained by an effective increase in volume concentration of rigid inclusions due to a rigidly adsorbed asphalt layer just 0.02 to 0.10 micrometer thick. Particle-interaction reinforcement appears to play a smaller role, possibly as a result of the interaction of partially altered asphalt layers, and was observed to be significant only at very high filler contents. More work is needed to better understand the nature of physiochemical reinforcing and to study other possible stiffening mechanisms in mastics such as agglomeration, state of dispersion, and particle-size distribution. |
| 总页数： | Transportation Research Record. 1999. (1681) pp157-169 (6 Fig., 2 Tab., 26 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- EVALUATION OF FATIGUE CRITERIA FOR ASPHALT BINDERS (WITH DISCUSSION AND CLOSURE).
- EFFECTS OF ASPHALTENES ON ASPHALT RECYCLING AND AGING (WITH DISCUSSION AND CLOSURE).
- EFFECT OF MOISTURE CONTENT ON MEASURED PROPERTIES OF ASPHALT MIXTURES (WITH DISCUSSION AND CLOSURE).
- EVALUATION AND IMPLEMENTATION OF AUTOMATED PROFILOGRAM REDUCTION SYSTEM: APPARE (WITH DISCUSSION AND CLOSURE).
- ZERO SHEAR VISCOSITY OF ASPHALT BINDERS (WITH DISCUSSION AND CLOSURE).
- DISTRIBUTION OF STRAINS WITHIN HOT-MIX ASPHALT BINDERS: APPLYING IMAGING AND FINITE-ELEMENT TECHNIQUES.
检索历史
应用推荐
