磨粒形态对水工抗冲磨混凝土磨损程度的影响.pdfVIP

学兔兔 2012年第 4期(总第 270期 ) 混 凝 土 原材料及辅助物料 Number 4 in 2012(To~1 No．270) Concrete MATERIAL AND ADMINICLE doi：10．3969／j．issn．1002-3550．2012．04．026 磨粒形态对水工抗冲磨混凝土磨损程度的影响 高欣欣。蔡跃波，丁建彤 (南京瑞迪高新技术有限公司 南京水利科学研究院，江苏 南京 210029) 摘 要：磨粒形态是水工混凝土的磨损程度的重要影响因素之一，为了更好的评价抗冲磨混凝土的使用寿命，需建立磨粒形态与混凝土 磨损程度之间的关系。通过改进水下钢球法试验，研究了在1．7-2．4m／s流速下，玄武岩石料对抗冲磨硅粉混凝土磨损率的变化过程。同时 采用图像采集方法获得石料的形状系数以衡量磨粒形态对混凝土磨损程度的影响。试验结果表明：水流流速越大，磨粒外形越尖锐，则混 凝土的磨损率越大，且磨粒形态与混凝土磨损率之间呈现幂函数关系。 关键词：磨粒形态；抗冲磨混凝土；磨损率 中图分类号：TU528．041 文献标志码：A 文章编号： 1002—3550(2012)04—0077—03 Study on the influence of form factor of abrasion particles on concrete GAOXin-xin，CAIYue—bo，DING]ian—tong (NanjingHydraulicResearchInstitute，NanjingRDHighTechnologyCompany，Sanjing210029，China) Abstract： The form factor ofabrasion particles is one ofthe most impo~ant Influencing factors ofabrasion resistance ofconcrete．In order to e- valuate the serves life ofconerete，a relationship about the form factor ofabrasion particles and the wear degree Ofabrasion resistance ofconcrete should be established．Wear process ofbasalt on concrete was studied under the flow velocity form 1．7 m／s to 2．4 m／s by a improved under water m~hod test equipment．Meanwhile，an image acquisition method was used to get the form factor ofbasalt to measure the influence ofform factor ofbasalt 0nweardegree ofconcrete．The result shows：the abrasion rate ofconcreteishigherwhentheflowvelocityisfast~andtheparticleform is sharper，and there is an exponential fimction relationship between particle form s and abrasion rate． KeyWOrds： form factor；abrasion resistance ofconcrete：abrasion rate