摘要
为了对废陶瓷骨料混凝土(RCAC)的基本力学性能进行试验研究,以C30混凝土为基准,利用废陶瓷作为再生骨料,分别按照不同比例(20%、35%、50%、65%、100%)等质量代替普通粗骨料制备RCAC试件,测试其力学性能,并通过掺加矿物掺合料、纤维和改变粗骨料的粒径级配来增强RCAC的强度和韧性。结果表明:废陶瓷粗骨料会不同程度地导致RCAC各项力学性能的降低。在取代率不超过50%时,试件的力学性能降低的程度较小,当取代率超过50%时,降幅则非常明显。三因素三水平的正交试验结果表明,玄武岩纤维掺量为0.15%、硅灰掺量为15%、粗骨料不同粒径范围(10~20 mm,5~10 mm)质量比5∶2是混凝土力学增强增韧的最优组合。
In order to conduct experimental research on the basic mechanical properties of waste ceramic aggregate concrete,C30 concrete was used as a benchmark to prepare recycled aggregate concrete by using waste ceramic to replace natural stones with five replacement rates of 20%,35%,50%,65%and 100%.And the mechanical properties of the recycled aggregate concrete were tested.The addition of mineral admixtures,fibers and changing the particle size gradation of coarse aggregates were applied to enhance strength and toughness of the waste ceramic aggregate concrete.The results show that the compressive strength,splitting tensile strength,flexural strength,axial compressive strength and elastic modulus of the waste ceramic aggregate concrete specimens decrease with the increase of the waste ceramic aggregate substitution rate.When the replacement rate of waste ceramic aggregate does not exceed 50%,the mechanical properties of recycled aggregate concrete specimens reduce a small extent,but the decrease becomes very obvious when the substitution rate exceeds 50%.The results of orthogonal design tests of three factors and three levels show that the optimal combination of concrete mechanical strengthening and toughening is that the volume of basalt fiber is 0.15%,the silica fume is 15%,the mass ratio of different particle size range of coarse aggregate of 10~20 mm and 5~10 mm is 5∶2.
作者
肖琪聃
冯留洋
徐钒栋
尹晓萌
李政
XIAO Qidan;FENG Liuyang;XU Fandong;YIN Xiaomeng;LI Zheng(College of Architecture and Civil Engineering/Henan New Environment-friendly Civil Engineering Material Engineering Research Center,Xinyang 464000,China;College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China)
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2022年第2期325-330,共6页
Journal of Xinyang Normal University(Natural Science Edition)
基金
国家自然科学基金项目(41807240)
河南省高等学校重点科研项目(19B560007)
河南省研究生教育改革与质量提升工程项目(YJS2021AL085)
河南省高等学校青年骨干教师培养计划(2019-163)
信阳师范学院“南湖学者奖励计划”青年项目(2016)
信阳师范学院研究生科研创新基金项目(2020KYJJ09)。
关键词
废陶瓷
再生骨料
取代率
力学性能
增强增韧
waste ceramic
recycled aggregate
replacement rate
mechanical properties
strengthening and toughening
