两种炭质材料对沥青混合料的抗热氧老化性能影响研究  

Study on the Influence of Two Kinds of Carbonaceous Materials on the Thermal Oxygen Aging Resistance of Asphalt Mixtures

作　　者：陈东鑫 CHEN Dongxin

机构地区：[1]福建省建筑科学研究院有限责任公司,福建省绿色建筑技术重点实验室,福建福州350108

出　　处：《福建建设科技》2024年第3期67-70,共4页Fujian Construction Science & Technology

基　　金：福建省住建厅科学技术计划项目,温拌再生沥青混合料关键技术研究(2023-K-13)。

摘　　要：热氧老化是沥青混合料的主要老化形式之一,提升沥青混合料抗热氧老化性能是决定沥青路面耐久性的关键因素。为了研究两种炭质材料对沥青混合料的抗热氧老化性能影响,分别制备出不同生物炭掺量、不同炭黑掺量以及生物炭与炭黑复合掺配的改性沥青混合料并通过一系列室内试验评价不同掺配方式下沥青混合料老化前后的路用性能。结果表明,当生物炭与炭黑复合掺配比例为9%:3%时,改善了沥青混合料老化前后各项路用性能,使其拥有良好的抗热氧老化性能。若是干燥、严寒地区可将生物炭与炭黑复合掺配比例调整为6%:6%,使沥青混合料的低温抗裂性保持最佳。Thermal oxidative aging is one of the main aging forms of asphalt mixtures,and improving the thermal oxidative aging resistance of asphalt mixtures is a key factor in determining the durability of asphalt pavement.In order to study the effect of two types of carbonaceous materials on the thermal oxidative aging resistance of asphalt mixtures,modified asphalt mixtures with different amounts of biochar,carbon black,and biochar carbon black composite blending were prepared.A series of indoor experiments were conducted to evaluate the road performance of asphalt mixtures before and after aging under different blending methods.The results showed that when the composite ratio of biochar and carbon black was 9%:3%,the road performance of asphalt mixture before and after aging was improved,making it have good resistance to thermal oxygen aging.If it is in dry and cold areas,the composite blending ratio of biochar and carbon black can be adjusted to 6%:6%to maintain the best low-temperature crack resistance of asphalt mixture.

关 键 词：沥青混合料 生物炭 炭黑 复配改性 热氧老化 

分 类 号：U414[交通运输工程—道路与铁道工程]