MODIFICATION OF ASPHALT AND ASPHALT PAVING MIXTURES BY SULFUR ADDITIVES
MODIFICATION OF ASPHALT AND ASPHALT PAVING MIXTURES BY SULFUR ADDITIVES
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DOI：
10.1021/i360055a009
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发表时间：
1975-01-01
期刊：
影响因子：
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通讯作者：
LEE, DY
中科院分区：
文献类型：
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作者：
LEE, DY
为了评价硫磺对沥青和沥青路面混合料的流变性、耐久性和化学效应，进行了五个系列的研究。在150 ℃的正常混合温度下将硫添加到沥青或沥青混凝土中。原始和老化（实验室和天然）硫沥青，在硫-沥青重量比为0.02至1.80，进行了测试针入度，延展性，软化点，沥青质百分比，总硫和游离硫百分比，混合物稳定性，和硫化氢的演变。在150 ℃的工作温度下，向沥青中加入硫导致沥青质含量、键合硫百分比和硫化氢释放的增加。数据还表明，存在最佳硫浓度的硫磺改性和硫磺沥青混凝土的稳定性。
Five series of investigations have been undertaken to evaluate the rheological, durability, and chemicaleffects of sulfur addition to asphalts and asphalt paving mixtures. Sulfur was added to asphalt or asphalt concrete at normal mixing temperature of 150 C. The original and aged (both laboratory and natural) sulfur asphalts, at sul-fur-asphalt weight ratios of 0.02 to 1.80, were tested for penetration, ductility, softening point, percent asphaltene, percent total and free sulfur, mixture stability, and hydrogen sulfide evolution. The addition of sulfur to as-phalt at working temperature of 150 C resulted in an increase in asphaltene content, percent bonded sulfur, and evolution of hydrogen sulfide. Data also indicated the existence of optimum sulfur concentration for sulfur modification and sulfur-asphalt concrete stability.