Abstract：
Recycling agents provide better additions of reclaimed asphalt pavement (RAP) in the production of new asphalt mixtures. Alternative and residual materials that have the potential as asphalt binder viscosity reducers have gained visibility in the field of paving due to the perspective of circular economy in recycled mixtures. Soybean oil sludge fatty acid is a material produced from soybean oil sludge, a waste generated in the soybean oil refining step. Thus, this paper investigated the physical, chemical, and rheological effects of the asphalt binder PG 64-XX modified by the fatty acid of soybean oil sludge in the contents of 6% and 7% by weight of the binder. The modified binder samples were submitted to penetration tests, softening point, rotational viscosity, performance grade (PG), before and after short-term aging (RTFO), and multiple stress creep and recovery (MSCR). A control asphalt mixture and recycled asphalt mixtures produced with 40% RAP and fatty acid-modified binders were subjected to tensile strength, induced moisture damage, resilient modulus, and fatigue life. A Student\'s t statistical test verified the significance of the data, as well as the estimation of production costs of these asphalt mixtures. The use of the fatty acid significantly reduced the stiffness and viscosity of the control asphalt binder, decreasing the mixing temperatures at 14 °C and 17 °C to 6% and 7%, respectively. Using higher fatty acid contents from soybean oil sludge significantly improved the performance of recycled mixtures in tensile strength, moisture damage, and fatigue life. The production cost of recycled asphalt mixtures was lower than that of the control mixture.
摘要：
再生剂在新沥青混合料的生产中提供了再生沥青路面（RAP）的更好添加。由于回收混合物中循环经济的观点,具有作为沥青结合料粘度降低剂的潜力的替代材料和残余材料在铺路领域已经获得了可见性。豆油污泥脂肪酸是由豆油污泥产生的物质,在大豆油精制步骤中产生的废物。因此，本文研究了物理，化学,大豆油污泥脂肪酸改性的沥青结合料PG64-XX的流变影响，其含量为粘结剂重量的6％和7％。改性粘结剂样品进行渗透测试，软化点,旋转粘度,性能等级(PG)，短期老化前后(RTFO)，和多重应力蠕变和恢复（MSCR）。对使用40％RAP和脂肪酸改性粘合剂生产的对照沥青混合料和再生沥青混合料进行拉伸强度，诱导的水分损伤，弹性模量，和疲劳寿命。学生t统计检验验证了数据的显著性，以及这些沥青混合料的生产成本估算。脂肪酸的使用显着降低了对照沥青结合料的刚度和粘度，将14°C和17°C的混合温度降低到6%和7%，分别。使用较高的脂肪酸含量从豆油污泥显著提高了性能的再生混合物的拉伸强度，湿气损坏,和疲劳寿命。再生沥青混合料的生产成本低于对照混合料。
