摘要
通过开展一系列劈裂强度测试、无侧限抗压强度测试和弯拉强度测试,研究了玄武岩短切纤维对水泥稳定多孔玄武岩碎石力学性能的增强作用。龄期为7 d的混合料劈裂试验表明,玄武岩短切纤维对水泥稳定多孔玄武岩碎石的劈裂强度具有显著的增强效果,其中长度为18 mm的纤维对混合料劈裂强度的增强效果优于12 mm、24 mm的纤维。掺加长度18 mm玄武岩纤维的水泥稳定多孔玄武岩碎石,其劈裂强度、无侧限抗压强度、弯拉强度等随着纤维掺量增加先增大后减小;当掺量为碎石质量的0.10%时,纤维对混合料各项力学性能的增强效果最好;随着养护龄期的延长,混合料力学性能不断提升。研究表明掺加玄武岩短切纤维可提高水泥稳定多孔玄武岩碎石的路用性能。
Through splitting strength tests,unconfined compressive strength tests and flexural-tensile strength tests,the enhancement effect of basalt chopped fiber on mechanical properties of cement stabilized porous basalt macadam was studied.The splitting test of mixture with age of 7 d shows that the basalt chopped fiber significantly improves the splitting strength of cement stabilized porous basalt macadam,and the enhancement effect of fiber with the length of 18 mm is better than the fiber with the length of 12 mm and 24 mm on splitting strength of mixture.As for cement stabilized porous basalt macadam with 18 mm basalt fiber,the splitting strength,unconfined compressive strength and flexural-tensile strength increase first and then decrease with the increase of the fiber content.When the fiber content is 0.10%(mass fraction),the fiber has the best enhancement effect on the mechanical properties of mixture.Adding the basalt chopped fiber increases the 7 d unconfined compressive strength,splitting strength and flexural-tensile strength of mixture by 0.7%to 5.4%,11.4%to 34.3%and 6.9%to 20.4%,respectively.With the increase of curing age,the mechanical properties of mixture are continuously improved.The 90 d unconfined compressive strength,splitting strength and flexural-tensile strength of mixture are 8.32 MPa,1.03 MPa and 3.72 MPa,respectively.The results show that the road performance of cement stabilized porous basalt macadam is improved by adding basalt chopped fiber.
作者
吴启一
姚华彦
扈惠敏
许泽宁
吴林松
鲍犇
WU Qiyi;YAO Huayan;HU Huimin;XU Zening;WU Linsong;BAO Ben(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Transportation Holding Group Co.,Ltd.,Hefei 230088,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第1期192-198,共7页
Bulletin of the Chinese Ceramic Society
基金
安徽省交通控股集团有限公司科技项目(JKKJ-2019-05)。
关键词
道路工程
多孔玄武岩
玄武岩纤维
水泥稳定碎石
力学性能
基层
road engineering
porous basalt
basalt fiber
cement stabilized macadam
mechanical property
road base
