关于碾压混凝土中氧化镁均匀性试验方法的商榷  

Thoughts on the Problems Existing in the Uniformity Test of Magnesium Oxide in Roller Compacted Concrete

作　　者：蔡杰龙 张君禄[1,2,3] 蔡灿旭 王梓鑫 王立华 CAI Jielong;ZHANG Junlu;CAI Canxu;WANG Zixin;WANG Lihua(Guangdong Research Institute of Wdtar Resources and Hydropower,Guangzhou 510635,China;Guangdong New Material and Structural Engineering Technology Research Center,Guangzhou 510635,China;Guangdong Provincial Key Scientific Research Base,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510635 [2]广东省水利新材料与结构工程技术研究中心,广东广州510635 [3]广东省水利重点科研基地,广东广州510635

出　　处：《广东水利水电》2020年第1期45-49,共5页Guangdong Water Resources and Hydropower

基　　金：广东省水利科技创新项目(编号:2014-04)

摘　　要：外掺氧化镁是水工碾压混凝土筑坝技术的重要手段,碾压混凝土中氧化镁的均匀性试验则是评价碾压混凝土施工质量的关键指标。目前,现行技术规范和技术导则中关于碾压混凝土中氧化镁均匀性试验的规定,包括试验步骤、结果计算和评价标准等,在实际试验工作开展中仍存在问题亟待解决。该文选取国内某工程中的实验数据,通过分析针对性提出其中存在的问题,并提出两种解决方法,包括标准曲线法和流态烘干法。经试验结果证明,两种新方法均能科学、合理、准确测得氧化镁的掺量,从而客观地评价碾压混凝土氧化镁的均匀性,可为完善现行规范与工程施工质量评价提供重要参考依据。The addition of magnesium oxide is an important means of hydraulic roller compacted concrete dam construction technology,and the uniformity test of magnesium oxide in roller compacted concrete is the key index to evaluate the construction quality of roller compacted concrete. At present,the current technical specifications and technical guidelines on the test of magnesia uniformity in roller compacted concrete,including test steps,result calculation and evaluation standards,there are still some problems to be solved in the actual test work.This paper selects the experimental data of a domestic project,puts forward the existing problems and thinking through the analysis,and puts forward two solutions,including the standard curve method and the flow pattern drying method. The test results show that the two new methods can measure the content of magnesium oxide scientifically,reasonably and accurately,so as to objectively evaluate the uniformity of magnesium oxide in roller compacted concrete. it can provide an important reference basis for improving the current code and engineering construction quality evaluation.

关 键 词：碾压混凝土 外掺氧化镁 标准曲线 均匀性试验 

分 类 号：TV424[水利工程—水工结构工程]