用超小直径混凝土芯样评定混凝土强度可行性研究  

Feasibility Study on Evaluating Concrete Strength with Ultra-small Diameter Concrete Core Sample

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作  者:刘梦溪[1] 刘晓鹏 王彦君[3] 陈莉 LIU Meng-xi;LIU Xiao-peng;WANG Yan-jun;CHEN Li(Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221008,China;China National Grid Chongqing Electric Power Company Construction Branch,Chongqing 400047,China;Jiangsu Geology and Mineral Resources Design Institute,Xuzhou 221008,China;Xuzhou City Hongda Civil Engineering Laboratory Limited Liability Company,Xuzhou 221000,China)

机构地区:[1]江苏建筑职业技术学院,徐州221008 [2]国网重庆市电力公司建设分公司,重庆400047 [3]江苏地质矿产设计研究院,徐州221008 [4]徐州市宏达土木工程试验室有限责任公司,徐州221000

出  处:《价值工程》2025年第6期13-16,共4页Value Engineering

摘  要:采用当地原材料制备混凝土,在现场制作混凝土板及试块,同条件养护到龄期28天,在混凝土板及试块上取芯,同时还在混凝土试块上进行超声回弹及抗压实验,取得了大量科研试验数据。项目重点研究了直径30.5mm、35mm和42mm混凝土小芯样抗压强度与混凝土标准芯样及标准试块抗压强度之间的线性关系,通过回归分析并结合以前的研究成果,得出关于超小直径芯样抗压强度的结论,探索在工程中的应用,弥补用超小直径芯样评定结构混凝土强度的空白。Local raw materials are used to prepare concrete,concrete slabs and test blocks are made on site,and the concrete slabs and test blocks are cored until the age of 28 days under the same conditions.At the same time,ultrasonic rebound and compressive tests are carried out on the concrete test blocks,and a large number of scientific research and test data are obtained.The project focuses on the linear relationship between the compressive strength of small concrete cores with diameters of 30.5mm,35mm and 42mm and the compressive strength of standard concrete cores and standard test blocks.Through regression analysis and combining previous research results,the conclusion on the compressive strength of ultra-small diameter core samples is drawn,and the application in engineering is explored.It makes up the gap of evaluating structural concrete strength with ultra-small diameter core sample.

关 键 词:钻芯法 标准芯样 混凝土 抗压强度 回归分析 

分 类 号:TU528[建筑科学—建筑技术科学]

 

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