共查询到19条相似文献,搜索用时 156 毫秒
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以提高沥青路面中面层高温动态模量为研究目标,以SK-90号沥青为基质沥青,通过对高模量低标号沥青、SBS改性沥青、青川岩沥青改性沥青及DUROFLEX高模量剂沥青混合料的高温性能试验,对比研究了高模量低标号沥青对高温性能的影响;采用SUP-19级配,以动稳定度和动态模量为指标评价了不同沥青混合料的高温性能。通过车辙试验、动态模量试验验证了高模量低标号沥青混合料的高温抗变形能力,即其抗车辙能力和动态模量较普通沥青混合料及与其他改性沥青混合料比较有显著提高。 相似文献
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利用天然岩沥青作改性剂,对AH-70基质沥青进行改性,采用AC-13型沥青混合料进行配合比设计,分别对0、5%、7.5%、10%掺量的岩沥青改性沥青混合料的动态模量进行试验研究,结果表明在一定温度控制下,掺加不同剂量的岩沥青改性剂,对沥青混合料动态模量均有较大的改善。在相同温度和频率下,随着岩沥青掺量的增加,动态模量逐渐增大,当岩沥青掺量达5%时,混合料动态模量满足法国高模量沥青混凝土的标准。 相似文献
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为了探究泡沫沥青和乳化沥青冷再生混合科之间性能的差异,对冷再生混合料进行了室内混合料设计和性能试验评价。结果显示:泡沫沥青和乳化沥青冷再生混合料具有优异的高温抗变形能力,适合作为路面的主要抗车辙层;乳化沥青冷再生混合料低温性能和水稳定性优于泡沫沥青混合料,抗弯拉和抗水损害能力较强。泡沫沥青和乳化沥青冷再生混合料均可用作沥青路面面层较低层位。 相似文献
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Sajad Rezaei Mohammadvoriya Khordehbinan Sayed-Mohammad-Reza Fakhrefatemi Sasan Ghanbari Mohammad Ghanbari 《Petroleum Science and Technology》2017,35(6):553-560
The production of modified asphalt mixtures with appropriate performance in high temperature has always been under the attention of researchers. One of these modifiers is Styrene Butadiene Styrene (SBS) polymer. Since the application of SBS polymer in bitumen and asphalt mixture does not have expected performance of field due to phase separation of bitumen and polymer, oxidation, and aging, the present study tries to not only improve the polymer defects, but also analyzes its high-temperature performance by using nano-SiO2 and SBS polymer in bitumen modification. According to the study results, adding nano-SiO2 and SBS polymer with 3 and 4.5 bitumen weight percent, respectively, to bitumen in asphalt mixture leads to an increase of flow number in dynamic creep test at 50°C for 399 times and at 60°C for 1,015 times compared to unmodified asphalt mix. This, in turn, indicates the considerable improvement of asphalt mixture high-temperature performance. 相似文献
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介绍了南海牌AH-70重交通道路沥青及SBSI-C改性沥青的技术性能及其用于广州新白云国际机场的机场主进场路面铺筑情况,详细阐述了机场主进场路面的组成结构、沥 青混合料的组成材料及技术性能指标.马歇尔试验得到,沥青混合料的稳定度在12~14 kN,流值在25~27 1/10 mm;车辙试验中,改性沥青混合料为3 500次/mm,AH-70重交通道路沥青混合料为1 700次/mm.施工实际抽检结果,混合料马歇尔试验稳定度在11.58~14.80kN,流值为24.3~30.4 1/10 mm,平整度、纹理度等各项指标均达到或超过JTJ 032-1994“公路沥青路面施工技术规范“要求. 相似文献
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通过对泡沫沥青混合料的配合比设计,探讨了泡沫沥青冷再生混合料的性能特点,并对设计材料的有关性能进行了分析,以期对泡沫沥青的应用具有借鉴意义。 相似文献
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Rezvan Babagoli Reza Mohammadi Mahmoud Ameri 《Petroleum Science and Technology》2017,35(11):1085-1090
The effect of styrene–butadiene–styrene (SBS) and nanoclay additive on performance of pure bitumen and stone matrix asphalt (SMA) mixture was investigated. Different samples with various percentages of nanoclay (2%, 3%, 4%, and 5%) and SBS (0% and 5%) by weight of bitumen were prepared, and the rheological and chemical behavior of bitumen (rotational viscosity, dynamic shear rheometer, SEM, and FTIR), the indirect tensile strength and moisture susceptibility of different mixtures were evaluated. Based on the results, using nanoclay and SBS polymer can improve the rheological behavior of base binder and the resistance of SMA mixtures against moisture damage. 相似文献
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The objective of this study was the evaluation of high-modulus asphalt mixtures (HMAM). Two types of hard-penetration bitumen (HPB) and conventional bitumen were used to fabricate Enrobés à Module Elevé Class 2 (EME2) and Grave Bitumen Class 5 (GB5)) and control mixtures, respectively. In this study, complex modulus, fatigue, dynamic creep and moisture sensitivity tests and also, Witczak and Zhou models were used to evaluate the performance of the prepared mixtures. Results showed that hard-penetration bitumen (HPB) improved the performance of asphalt mixtures compared to conventional bitumen. 相似文献
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筛选出适合制备硬质道路石油沥青关键组分的减压渣油,并以此为原料,考察了蒸馏深拔、深度氧化及溶剂脱沥青工艺制备的硬质道路沥青关键组分的性能。所制备的关键组分能够大幅提升基质沥青的高温性能,且通用性好;将关键组分与基质沥青按适合比例调合可以稳定生产高温性能好的硬质道路石油沥青,其混合料耐高温性能好。同时,为便于硬质沥青关键组分的使用,还开发了关键组分的造粒成型技术,提出其适于成型造粒的黏度范围为0.6~6 Pa?S。采用关键组分生产的硬质道路沥青用于高速公路实体工程,经过2年以上的气候和通车考验,沥青路面无车辙、无开裂,保持优良的使用性能。 相似文献