Effects of different warm mixing agents on properties of asphalt and warm mixing asphalt mixture
Source abstract
Abstract
Effects of two types of warm mix agents (WSG-H01 and WSG-H02) and their dosage on performance of warm mix asphalt (WMA) and warm mix asphalt mixture (WMAM) were evaluated. Based on permeability, softening point, and ductility tests , the influence of warm mix agents on viscosity , high-temperature and low-temperature performance was analyzed. Based on Brookfield viscosity test, the influence of WMAM on forming temperature was analyzed. Based on Marshall, rutting and freeze-thaw splitting tests, the influence of warm mix agent on the performance of WMAM pavement was analyzed. The optimal contents of WSG-H01 and WSG-H02 were 3 % and 2 %. WSG-H02 was superior to WSG-H01 considering penetration degree and softening point. Ductility improvement of WSG-H01 was better. Taking 4.3 % as the target voidage , WSG-H01 and WSG-H02 reduced the molding temperature of WMAM by 24 and 20 ℃. With addition of WSG-H01, stability, flow value and freeze-thaw splitting tensile strength ratio of WMAM were increased by 0.38 kN, 0.11 mm and 8 %, respectively. WSG-H02 improved the rutting resistance of WMAM under high temperatures, dynamic stability was increased by 5063 times /mm. Infrared spectrum analysis showed warm mixing agents did not change the characteristic peak of asphalt chemically. SEM results showed when WMA was applied to the preparation of crumb rubber asphalt mixtures, warm mix asphalt would make the crumb rubber disperse evenly. Two agents exhibited superior effects on mixing temperature, they exerted no detrimental impact on pavement performance .
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Infrastructure Maintenance and Monitoring · Polymer Nanocomposites and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
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