Evaluation of thermal behavior and high-temperature performances of asphalt mixture containing fly ash cenosphere
Evaluation of thermal behavior and high-temperature performances of asphalt mixture containing fly ash cenosphere
复制标题
粉煤灰微珠沥青混合料热行为及高温性能评价
DOI：
10.1016/j.conbuildmat.2020.118429
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发表时间：
2020-06
影响因子：
7.4
通讯作者：
Liu Weidong
中科院分区：
文献类型：
--
作者：
Du Yinfei;Xu Ling;Deng Haibin;Deng Deyi;Wu Hao;Liu Weidong
为了防止太阳能热量传递到沥青路面中，采用粉煤灰空心微珠（FAC）通过替代不同体积（即，25%、50%、75%和100%）的石灰石矿物填料（LMF）。同时，还对上述混合料的剪切强度和高温性能进行了研究。结果表明，用FAC取代LMF会增加LTCM的空隙率，再加上FAC的中空结构，导致LTCM的导热系数最大降低20.9%。根据室内辐照测试，最大内部温度降低达到2.4 °C。然而，增加的空气空隙率导致降低的力学性能和抗车辙性能的LTCM。FAC完全取代LMF后，抗剪强度降低了11.4%。LTCM在60 °C的温度下的流数最大减少了65.9%。根据5Hz频率下的动态模量主曲线（参考温度为21.1 °C），当LMF完全被FAC取代时，LTCM的动态模量降低了24.5%。在今后的研究中，应同时考虑沥青路面的冷却和LTCM抗车辙能力的降低，以探讨FAC对沥青路面车辙性能的实际影响。
In order to prevent solar heat from transferring into asphalt pavement, fly ash cenosphere (FAC) was used to prepare low-thermal-conductivity asphalt mixtures (LTCMs) by replacing different volumes (i.e., 25%, 50%, 75% and 100%) of limestone mineral filler (LMF). Meanwhile, the shear strength and high-temperature performances of the above mixtures were also investigated. The results show that replacing LMF with FAC would increase the air voids content of LTCM, which, together with the hollow structure of FAC, led to the thermal conductivity of LTCM reducing by a maximum of 20.9%. According to an indoor irradiation test, the maximum inner temperature reduction reached up to 2.4 °C. However, the increased air voids content resulted in reduced mechanical and anti-rutting performances of LTCM. The shear strength reduced by 11.4% when LMF was completely replaced by FAC. The flow number of LTCM at the temperature of 60 °C reduced by a maximum of 65.9%. According to the dynamic modulus master curve (reference temperature of 21.1 °C) at the frequency of 5 Hz, the dynamic modulus of LTCM reduced by 24.5% when LMF was completely replaced by FAC. The cooled asphalt pavement and reduced rutting resistance of LTCM should be both considered in future studies to investigate the actual effect of FAC on the rutting performance of asphalt pavement.
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影响因子：
11.1
作者：
Chen, Jun;Yin, Xiaojing;Ding, Yangmin
通讯作者：
Ding, Yangmin
影响因子：
6.4
作者：
Al-Ajlan, Saleh A.
通讯作者：
Al-Ajlan, Saleh A.
DOI：
10.1061/(asce)0899-1561(2007)19:8(683
发表时间：
2007-08-01
影响因子：
3.2
作者：
Gui, Jooseng (Gavin);Phelan, Patrick E.;Golden, Jay S.
通讯作者：
Golden, Jay S.
影响因子：
1.7
作者：
Biligiri, Krishna P.;Kaloush, Kamil E.;Witczak, Matthew W.
通讯作者：
Witczak, Matthew W.
影响因子：
1.2
作者：
Qiang Li;Xiang Ma;F. Ni;Guofen Li
通讯作者：
Qiang Li;Xiang Ma;F. Ni;Guofen Li