摘要
为研究硅微粉对沥青混凝土路用性能的影响,以掺量为0、0.3%、0.5%、0.7%、0.9%的中性硅微粉作为外加剂,通过车辙试验、劈裂试验和冻融劈裂试验对沥青混凝土的高温稳定性、低温抗裂性和水稳定性进行试验研究。试验结果表明:在沥青混凝土最佳油石比及矿料级配一定的条件下,随着硅微粉掺量的增加,沥青混凝土的高温稳定性能逐渐增强,硅微粉掺量为0.9%时,其动稳定度达到2700次/mm;低温抗裂性能先增大后减小,硅微粉掺量为0.3%时,劈裂强度达到0.88 MPa;水稳定性随着硅微粉掺量的增加逐渐减弱,硅微粉掺量为0.9%时,冻融劈裂强度比最小。综合比较之后,硅微粉掺量在0.3%~0.5%时,沥青混凝土各项性能较好。
In order to study the effect of silicon powder on asphalt pavement performance,0,0.3%,0.5%,0.7%,0.9%neutral silicon powder were used as admixtures to pass the rutting test,splitting test and freeze-thaw splitting test.The high temperature stability,low temperature crack resistance and water stability of asphalt concrete were studied experimentally.The test results show that under the condition of optimum oil-stone ratio of asphalt concrete and grading of mineral materials,the high-temperature stability of asphalt concrete increases with the increase of the silicon micro-powder.When the content of silica micro-powder is 0.9%,the dynamic stability reached 2700 times/mm;the low temperature crack resistance first increased and then decreased.When the silicon powder content was 0.3%,the low temperature crack resistance reached 0.88 MPa;the water stability gradually increased with the increase of silicon powder content.When the amount of silicon powder is the largest,the freeze-thaw splitting strength ratio is 66.7%.After comprehensive comparison,when the amount of silica powder is between 0.3%and 0.5%,the performance of asphalt concrete is better.
作者
万青青
孙浩
王勃
杨秋宁
李宏波
WAN Qing-qing;SUN Hao;WANG Bo;YANG Qiu-ning*;LI Hong-bo(College of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China;CCCC Infrastructure Maintenance Group Co.,Ltd.,Beijing 100000,China;Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation,Yinchuan 750021,China;Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions,Yinchuan 750021,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2020年第1期25-31,共7页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51968061)
宁夏高校资助项目(NGY2018051)
宁夏回族自治区重点研发计划重大(重点)项目(2018BEG02009)
宁夏高等学校一流学科(水利工程学科)资助项目(NXYLXK2017A03)
教育部“长江学者和创新团队发展计划”创新团队资助项目(IRT1067)
宁夏回族自治区对外科技合作专项资助项目(2018BFH03002)
