Effect of fiber types on relevant properties of porous asphalt

The research was conducted to evaluate the effects of cellulose and polyester fibers on the properties of porous asphalt mixes, using the tests of draindown, abrasion, volumetric properties, rutting, and moisture damage. Images of scanning electron microscopy and X-ray computerized tomography were adopted to identify the microstructure of the fiber and inner stone skeleton of porous asphalt. The influence of rutting parameter （G＊/sin δ） of asphalt modified by different fibers on the rutting resistance of the mixes was investigated. Based upon MOHR-COULOMB theory, the cohesion and the angle of internal friction of the mixes were derived from both indirect tension and unconfined compression strength. The experimental results indicate that fibers mainly stabilize asphalt binder and thicken asphalt film around aggregates. Furthermore, they result in the improved mechanical strength of porous asphalt mixes at high temperature slightly. From comparison analysis, cellulose fibers appear to perform better than polyester fibers in porous asphalt mixes.     

《石油沥青纸胎油毡》国家标准的修订

《石油沥青纸胎油毡》国家标准进行了第三次修订。本文介绍了修订的理由、修订的内容与依据，并与国内外同类产品标准进行了比较。     

大港渣油掺兑催化油浆氧化沥青的研究

重油催化裂化外甩油浆中富含芳烃，可望在国产原油生产优质道路沥青上发挥作用。对大港环烷基渣油中掺兑一定比例的油浆后氧化改善道路沥青性质的可能性进行了研究，结果表明：渣油掺兑油浆氧化，不仅可以有效改善沥青延度，同时也为油浆的合理利用开辟了一条新途径。     

Studies on jute–asphalt composites

The tensile properties of jute make it a suitable raw material for asphalt overlay (A/O) fabric. In this study, the thermal stability of jute under conditions of asphalt overlaying process was investigated and the compatibility of jute with asphalt was assessed through experimentation on jute–asphalt composites under mechanical and hygral loads. Fourier transform infra red (FTIR) spectroscopic study revealed probable chemical bonding between jute and asphalt. The test for ascertaining the capability of asphalt encasement for protecting jute against biodegradation under enzymatic attack was found positive. A 6‐month hygral treatment, of the jute–asphalt composite, showed significant increase in modulus of the material. The results indicate that although the strength of jute deteriorates by about 10% under asphalt overlaying condition, the overall tensile behavior of jute fabric–asphalt composite material is considerably superior to that of the pure jute fabric, even under biological and extended hygral loading conditions. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci 2008     

欢喜岭重交通道路沥青SHRP性能研究

应用Superpave沥青胶结料试验动态剪切试验、压力老化试验和弯曲梁流变试验评定欢喜岭重交通道路沥青的抗永久变形、抗低温开裂和抗疲劳开裂性能，确定欢喜岭重交沥青最高和最低路面设计温度及PG等级，表明欢喜岭重交沥青满足我国广阔地域的使用要求。     

白云鄂博主矿开拓运输工艺转换有关问题的探讨

本文对白云鄂博主矿采场铁公路联合运输向公路运输转换位置是否确定为1638m水平以及运输工艺转换过程中相关问题进行分析论证，提出主矿采场铁路至少可向下延深一个水平，技术上可行，节约运费千万元以上。     

改性沥青在道路大修工程中的应用

通过在山西省府西街段SMA改性沥青试验段的施工情况,详细地阐述了沥青在道路大修工程中的应用,提出了改性沥青施工的质量控制措施,以提高沥青路面的温度稳定性及弹性恢复性能,以期实现道路的耐久性等目的。     

添加煤沥青提高焦炭强度的研究

本文进行了煤和煤沥青共炭化试验,将煤沥青添加到20kg焦炉内进行炼焦试验。结果表明,煤沥青对武钢用煤有一定的改质作用,添加煤沥青可提高焦炭强度。     

大碎石柔性基层沥青性能分析

用沥青大碎石柔性基层对旧路面进行补强，可以有效地提高路面的使用性能，减少反射裂缝的产生，延长道路的使用寿命。对沥青大碎石柔性基层用加德士AH-70、SBS改性沥青和MAC改性沥青分别进行试验，通过试验结果和经济性能对比分析，找到适合此结构的最佳沥青。     

路用改性沥青的开发动向

介绍了橡胶改性沥青、树脂改性沥青、硫磺改性沥青、金属有机皂改性沥青、表面活性剂改性沥青等路用改性沥青的开发动向及应用。