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首页> 外文会议>Collaborative management of integrated watersheds >MIXTURE PROPORTIONING STUDY FOR MASSIVE CONCRETE ELEMENTS AT THE FOLSOM DAM JFP
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MIXTURE PROPORTIONING STUDY FOR MASSIVE CONCRETE ELEMENTS AT THE FOLSOM DAM JFP

机译：FOLSOM DAM JFP中大量混凝土元素的混合比例研究

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摘要

A mix proportioning study was conducted to evaluate massive concrete elements for the U.S. Army Corps of Engineers' and Bureau of Reclamation's Folsom Dam Joint Federal Project (JFP). Mixtures were developed for the auxiliary spillway control structure, spillway approach channel, chute, and stilling basin. The results of this study are being used in a Nonlinear, Incremental Structural Analysis (NISA), seismic structural analyses, and to prepare project guidelines and specifications.rnOver 175,000 cubic yards of 3-inch nominal maximum size aggregate concrete is needed for the Auxiliary Spillway Control Structure. Mass concrete mixture proportions were developed and mechanical and thermal testing was performed. Concrete was designed with a crushed limestone quarry aggregate and a rounded river deposit aggregate using three cementitious material combinations. Comprehensive mechanical properties testing was performed on multiple mixtures at varying ages including; compressive strength, elastic modulus, Poisson's ratio, hardened density, tensile strain capacity, creep and autogenous length change, and direct shear at lift line interfaces. Thermal properties testing was also conducted on selected mixtures including: adiabatic temperature rise, thermal diffusivity, specific heat, thermal conductivity, coefficient of linear thermal expansion and heat of hydration of cementitious materials.rnThe methodology used to develop mixture proportions and the mixture optimization techniques utilized for 100 plus batches of concrete is presented. Material testing methods and an overview of the testing results is discussed.
机译：进行了混合比例研究，以评估美国陆军工程兵团和开垦局的佛森大坝联合联邦项目（JFP）的大型混凝土构件。为辅助溢洪道控制结构，溢洪道进近通道，溜槽和消沉池开发了混合物。这项研究的结果正在用于非线性增量结构分析（NISA），地震结构分析以及准备项目准则和规格。辅助溢洪道需要超过175,000立方码的3英寸标称最大尺寸骨料混凝土。控制结构。开发了大体积混凝土混合物的比例，并进行了机械和热测试。使用三种胶凝材料组合设计了碎石灰石采石场和圆形河床集料。对不同年龄的多种混合物进行了综合机械性能测试，包括：抗压强度，弹性模量，泊松比，硬化密度，拉伸应变能力，蠕变和自生长度变化以及在提升线界面处的直接剪切。还对选定的混合物进行了热性能测试，包括：绝热温度升高，热扩散系数，比热，导热系数，线性热膨胀系数和水泥质材料的水化热.rn用于开发混合物比例的方法和所使用的混合物优化技术介绍了100批以上的混凝土。讨论了材料测试方法和测试结果概述。

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  • 会议地点 Sacramento CA(US)
  • 作者

    Katie Bartojay; William Halczak;

  • 作者单位

    Bureau of Reclamation,, Technical Service Center, Materials Engineering and Research Laboratory, Denver Federal Center, PO Box 25007 (86-68180), Denver, CO 80433;

    U.S. Army Corps of Engineers, Sacramento District, 1325 J Street, Sacramento, CA 95814-2922;

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  • 正文语种 eng
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