乳化沥青橡胶混凝土的力学性能  

Mechanical properties of emulsified asphalt rubber concrete

作　　者：林强 刘赞群[1] 禹雷 周蕴婵 崔雨 LIN Qiang;LIU Zanqun;YU Lei;ZHOU Yunchan;CUI Yu(School of Civil Engineering,Central South University,Changsha 410075,China;China Railway Engineering Design and Consulting Group CO.,LTD.,Beijing 100055,China)

机构地区：[1]中南大学土木工程学院,长沙410075 [2]中铁工程设计咨询集团有限公司,北京100055

出　　处：《复合材料学报》2023年第3期1560-1568,共9页Acta Materiae Compositae Sinica

摘　　要：对用乳化沥青(Emulsified asphalt,EA)改善橡胶混凝土(Crumb rubber concrete,CRC)的力学性能进行了研究。通过抗压、抗折、劈裂抗拉和三点弯曲试验,研究了5%、10%和15%3种橡胶掺量(等体积取代细骨料)下,EA理论计算成膜覆盖橡胶颗粒表面4层、6层和8层膜对应不同EA掺量对CRC力学性能的影响。试验结果发现,对比未预处理CRC和NaOH预处理CRC两个对照组:掺入不同掺量EA后,不同橡胶掺量的CRC的抗压强度和劈裂抗拉强度均有较大提高,CRC的峰值位移显著增大,弯曲弹性模量Eb明显降低;乳化沥青与橡胶质量比为0.15(6层EA膜)时,3种橡胶掺量下CRC较未预处理组相比抗压强度平均提高3.5%,峰值位移提高27.6%,Eb降低21.8%,乳化沥青橡胶混凝土具有较突出的力学性能复合效应。The effects of emulsified asphalt(EA) on the mechanical properties of crumb rubber concrete(CRC)were explored. The fine aggregate was replaced with 5%, 10% and 15% rubber by volume in concrete, and different EA contents corresponding to 4, 6 and 8 layers of films covering the surface of rubber particles according to theoretical calculation were studied. The results of compressive strength, flexural strength, splitting tensile strength and three-point bending experiments show that, compared with the unpretreated CRC and NaOH pretreated CRC,the compressive strength and splitting tensile strength of the CRC with different rubber contents are greatly improved by adding different amounts of EA, the peak displacement increases and the flexural elastic modulus Eb decreases significantly;when the mass ratio of emulsified asphalt to rubber is 0.15(6 layers of EA film), compared with the unpretreated CRC, the average increase in compressive strength is 3.5%, the peak displacement is 27.6%, and Eb is 21.8% lower for CRC at three rubber contents, emulsified asphalt-rubber concrete has a more prominent composite effect of mechanical properties.

关 键 词：橡胶颗粒 混凝土 乳化沥青 力学性能 回收 

分 类 号：TB332[一般工业技术—材料科学与工程]