摘要
为优化粉煤灰和玄武岩纤维沥青混合料的配合比,分析粉煤灰和玄武岩纤维对沥青混合料的路用性能提升效果,将玄武岩纤维掺量、粉煤灰掺量和油石比作为影响因素,通过响应曲面分析得出混合料最优掺量;然后通过马歇尔试验、浸水马歇尔试验、低温小梁弯曲试验,对配合比优化后的沥青混合料进行路用性能分析。结果表明:粉煤灰和玄武岩纤维沥青混合料的最优配合比为粉煤灰掺量6.92%,玄武岩纤维掺量0.39%,油石比5.30%;马歇尔稳定度各项响应指标的预测值与实测值误差最大值仅为4.04%,表明了响应曲面分析具有较高的可靠性;相比单掺纤维沥青混合料,最优配合比混合料的稳定度提升了7.7%,残留稳定度提升了7.52%,最大弯拉应变提升了13.47%,高温稳定性、低温抗裂性、水稳定性等指标均有较大提升,2种材料对AC-13C级配的改性沥青混合料的路用性能有显著的复合改性效果。优化得到的混合料配合比可为粉煤灰和玄武岩纤维在路面工程使用提供依据。
To optimize the mix ratio of fly ash and basalt fiber asphalt mixture,the effect of fly ash and basalt fiber on the road performance of asphalt mixture was analyzed.The basalt fiber content,fly ash content and asphalt-stone ratio were taken as influencing factors,and the optimal content of the mixture was obtained through response surface analysis.Then,the road performance of the asphalt mixture with optimized mix ratio was analyzed through Marshall test,immersed Marshall test and low-temperature beam bending test.The results show that the optimal mix ratio of fly ash and basalt fiber asphalt mixture is 6.92%fly ash,0.39%basalt fiber,and 5.30%asphalt-rock ratio;the maximum error between the predicted value and the measured value of each response index of Marshall stability is only 4.04%,which shows that the response surface analysis has high reliability;compared with the single fiber asphalt mixture,the stability of the optimal mix ratio mixture is increased by 7.7%,the residual stability is increased by 7.52%,and the maximum bending tensile strain is increased by 13.47%.Furthermore,the high temperature stability,low temperature crack resistance,water stability and other indicators are greatly improved.The two materials have a significant composite modification effect on the road performance of AC-13C graded modified asphalt mixture.The optimized mix ratio results in this paper can provide a basis for the use of fly ash and basalt fiber in pavement engineering.
作者
俞烨炜
王修山
李震南
刘淇
胡奕琦
YU Yewei;WANG Xiushan;LI Zhennan;LIU Qi;HU Yiqi(School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Construction Equipment,Zhejiang College of Construction,Hangzhou 311231,China)
出处
《浙江理工大学学报(自然科学版)》
2025年第4期533-540,共8页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省自然科学基金项目(LGF22E080016)。
关键词
道路工程
玄武岩纤维
粉煤灰
改性沥青
响应曲面法
路用性能
road engineering
basalt fiber
fly ash
modified asphalt
response surface method
pavement performance
