冰凌作用下天然浮石混凝土磨损规律研究  

Wear Law of Natural Pumice Concrete under Ice Friction

作　　者：王萧萧[1,2,3] 冯蓉蓉 荆磊 刘曙光 闫长旺[3,4] 姜琳 WANG Xiaoxiao;FENG Rongrong;JING Lei;LIU Shuguang;YAN Changwang;JIANG Lin(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia Engineering Research Center of Ecological Building Materials and Prefabricated Construction,Hohhot 010051,China;School of Mining and Technology,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051 [2]内蒙古工业大学,内蒙古自治区土木工程结构与力学重点实验室,呼和浩特010051 [3]生态型建筑材料与装配式结构内蒙古自治区工程研究中心,呼和浩特010051 [4]内蒙古工业大学矿业学院,呼和浩特010051

出　　处：《硅酸盐通报》2022年第9期3100-3106,共7页Bulletin of the Chinese Ceramic Society

基　　金：中央引导地方科技发展资金项目(2021ZY0024);内蒙古自治区自然科学基金(2022MS05034);内蒙古自治区科技成果转化项目(2019CG072);内蒙古工业大学科学研究项目(ZZ20216)。

摘　　要：冰磨损是导致水工混凝土损伤的重要因素之一。为探究冰凌作用下天然浮石混凝土的磨损规律,以内蒙古地区的天然浮石为粗骨料,研究浮石骨料体积分数、水胶比、胶凝材料硬度对冰磨损天然浮石混凝土的影响规律,分析了不同因素对天然浮石混凝土磨损量影响的显著性,运用超景深显微镜对冰磨损下天然浮石混凝土的表观形貌进行观测。结果表明:冰磨损天然浮石混凝土磨损量随浮石骨料体积分数和水胶比的增加而增加,随胶凝材料硬度的增加而降低;浮石骨料体积分数和水胶比对天然浮石混凝土磨损量的影响较为显著;在切削磨损和疲劳磨损的共同作用下天然浮石混凝土表层材料脱落,磨损表面孔壁被破坏,孔洞增大。Ice wear is one of important factors affecting the damage of hydraulic concrete.In order to investigate the wear law of natural pumice concrete under ice friction,natural pumice in Inner Mongolia was used as coarse aggregate,and the effects of volume fraction of pumice aggregate,water-binder ratio and cementitious material hardness on the wear of natural pumice concrete were studied.The significance of different influencing factors on the wear amount of natural pumice concrete was analyzed.The apparent morphology of natural pumice concrete under ice wear was observed by super depth of field microscope.The results show that the wear amount of natural pumice concrete increases with the increase of pumice aggregate volume fraction and water-binder ratio,and decreases with the increase of cementitious material hardness.The volume fraction of pumice aggregate and water-binder ratio have significant effects on the wear amount of natural pumice concrete.The surface material of natural pumice concrete falls off under the action of cutting and fatigue wear mechanisms.The hole wall of the worn surface is damaged and the holes are enlarged.

关 键 词：冰磨损 天然浮石混凝土 磨损量 磨损规律 显著性分析 磨损形貌 

分 类 号：TU528.2[建筑科学—建筑技术科学]