Impact of sugarcane bagasse fiber dosage on Marshall indexes of SMA-13 mixtures
To promote the use and popularization of sugarcane bagasse in asphalt pavement,and to improve the performance of stone matrix asphalt(SMA)mixtures,SMA-13 specimens are prepared using five different mass fractions of sugarcane fiber(0.1％,0.2％,0.3％,0.4％,0.5％)and five different bitumen-to-stone ratios(5.6％,5.9％,6.2％,6.5％,6.8％)based on the Marshall test method.The optimal bitumen-to-stone ratio of the asphalt mixture is determined,and the variation of Marshall technical indexes with the mass fraction of sugarcane fibers is analyzed.Single-factor analysis of variance is used to determine the significance of the influence of sugarcane fiber mass fractions on the Marshall technical indexes of the asphalt mixture.The results show that with a constant mass fraction of sugarcane fiber,as the bitumen-to-stone ratio increases,the Marshall stability of the SMA-13 mixture first increases and then decreases,while the flow value and bitumen saturation continuously increases,and the void ratio decreases continuously,with the aggregate interstitial ratio initially decreasing and then increasing.With a constant bitumen-to-stone ratio,as the mass fraction of sugarcane fiber increases,the Marshall stability of the SMA-13 mixture first increases and then decreases,while the flow value,void ratio,and aggregate interstitial ratio increases continuously,with bitumen saturation first increasing and then decreasing.Sugarcane fibers of different mass fractions significantly influence the Marshall technical indicators of the SMA-13 mixture,ranked in order of influence from strongest to weakest as Marshall stability,flow value,aggregate interstitial ratio,void ratio,and bitumen saturation.When the mass fraction of sugarcane fiber increases from 0.1％to 0.3％,the Marshall stability increases by 41.3％to reach maximum Marshall stability,with low flow value and compliant void ratio,aggregate interstitial ratio,and bitumen saturation,indicating the optimal mass fraction of sugarcane fiber to be 0.3％.
asphalt parementbagasse fiberSMA-13 mixtureMarshall index
万方数据
维普
