机构地区: 华南理工大学土木与交通学院
出 处: 《华南理工大学学报(自然科学版)》 2012年第2期87-91,共5页
摘 要: 为评价布敦岩沥青对基质沥青混合料的改性效果,采用A-70沥青作为基质沥青,对不同掺量布敦岩沥青混合料的路用性能进行了试验研究.结果表明:布敦岩沥青混合料的马歇尔稳定度、劈裂抗拉强度和水稳定性明显优于基质沥青混合料和SBS改性沥青混合料;其动稳定度远远高于基质沥青混合料,接近于SBS改性沥青混合料;布敦岩沥青能有效改善混合料的低温性能,但当布敦岩沥青掺量从20%增加到25%时,混合料的低温性能有所降低,因此工程应用中的布敦岩沥青掺量不宜超过25%. In order to evaluate the properties of asphalt mixtures modified by Buton rock asphalt (BRA), A-70 as- phalt was used as the base asphalt to test the pavement performances of modified asphalt mixtures with different BRA dosages. The results show that ( 1 ) the Marshall stability, the splitting strength and the water stability of BRA mixtures are all higher than those of A-70 asphalt and SBS modified asphalt mixtures; (2) the dynamic stability of BRA mixtures is much stronger than that of A-70 asphalt mixtures but is similar to that of SBS modified asphalt mix- tures ; ( 3 ) though BRA helps to effectively improve the low-temperature performance of asphalt mixtures, its dosage should not exceed 25 % in engineering because the low-temperature performance of the mixtures degrades when the BRA dosage increases from 20% to 25%.
关 键 词: 布敦岩沥青 沥青混合料 路用性能 改性机理 高温稳定性 水稳定性 低温 性能
领 域: [交通运输工程]