Application of Microtomography to Fracture Processes in Cement-Based Materials
Application of Microtomography to Fracture Processes in Cement-Based Materials
批准号:
9523019
负责人:
Surendra Shah
金额:
$5.95万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1996
资助国家:
美国
项目状态:
已结题
起止时间:
1996-01-01 至 1997-12-31
中文摘要
这是缅因大学和西北大学的联合研究项目。本研究的目的是观察单轴压缩条件下小体积水泥砂浆试件内部微裂纹的三维扩展情况。微裂纹将使用同步加速器x射线微断层扫描结合三维图像分析技术进行测量。该研究工作首次实现了以微米级分辨率对水泥基材料内部开裂进行定量测量。更清楚地了解断裂机制对于开发既强又韧的材料至关重要。近年来,利用亚微米毫米范围内的微细颗粒填充概念,研制出抗压强度可达800mpa的混凝土。研究了颗粒尺寸分布(反应性和非反应性)对断裂韧性的影响。
英文摘要
9523019 Shah This is a joint research project between University of Maine and Northwestern University. The objective of the research is to observe the three dimensional growth of internal microcracks in small cement and mortar specimens loaded in uniaxial compression. The microcracking will be measured using synchrotron x-ray microtomography combined with a 3-D image analysis technique. The research work represents the first time that quantitative measurements of internal cracking of cement-based materials have been possible at micron resolution. A clearer understanding of fracture mechanisms are critical for the development of materials which are both stronger and tougher. Recently, using the concepts of microfine particle packing in the range of submicron millimeter, concrete with a compressive strength of up to 800 MPa has been developed. The influence of particle size distribution (reactive and non-reactive particles) on fracture toughness is to be investigated.
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Collaborative Research: Measuring, Monitoring, and Modeling the Setting Properties of Concrete
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批准号:0653869
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项目类别:Standard Grant
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资助金额:$14.49万
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财政年份:2007
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负责人:Surendra Shah
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依托单位:
Thixotropy and Formwork Pressure of SCC
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批准号:0625606
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2006
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负责人:Surendra Shah
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依托单位:
Sensing Intrinsic Nano-Microstructural Characteristics of Hardening Concrete with High-Frequency Transverse Waves
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批准号:0408427
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2004
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负责人:Surendra Shah
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依托单位:
1st International Symposium on Nanotechnology in Construction
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批准号:0331773
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项目类别:Standard Grant
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资助金额:$1.03万
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财政年份:2003
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负责人:Surendra Shah
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依托单位:
FHWA/NSF Workshop on Imaging and Simulation of Concrete Structures (Nano to Mesoscale)
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批准号:0332356
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项目类别:Standard Grant
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资助金额:$5.74万
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财政年份:2003
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负责人:Surendra Shah
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依托单位:
Collaborative Research: Theoretical, Experimental, and Stochastic Multi-Scale Analysis of Concrete
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批准号:0301519
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项目类别:Standard Grant
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资助金额:$8.7万
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财政年份:2003
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负责人:Surendra Shah
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依托单位:
Partnership for Advancing Technology in Housing: Extruded Fiber-Reinforced Cement Composites for Residential Construction
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批准号:0122045
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项目类别:Standard Grant
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资助金额:$15.0万
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财政年份:2001
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负责人:Surendra Shah
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依托单位:
Development of Non-Clinker Based Cement for Hazard Reduction
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批准号:0086819
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项目类别:Standard Grant
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资助金额:$20.0万
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财政年份:2000
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负责人:Surendra Shah
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依托单位:
Integrating Experiemental Techniques/An Inquiry-Based Laboratory Approach to Teaching
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批准号:9750505
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项目类别:Standard Grant
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资助金额:$5.41万
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财政年份:1997
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负责人:Surendra Shah
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依托单位:
U.S.-Germany Cooperative Research on Strain Softening Response of High Strength Concrete
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批准号:9106732
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项目类别:Standard Grant
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资助金额:$1.68万
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财政年份:1992
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负责人:Surendra Shah
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依托单位:
Teaching the Materials Science, Engineering, and Field Aspects of Concrete
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批准号:9255467
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项目类别:Standard Grant
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资助金额:$12.07万
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财政年份:1992
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负责人:Surendra Shah
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依托单位:
State-of-the-Research Visit to Japan
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批准号:9015518
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项目类别:Standard Grant
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资助金额:$1.03万
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财政年份:1990
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负责人:Surendra Shah
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依托单位:
Use of Toughness Data in Specification, Design and Performance Evaluation of Fiber Cement Composites
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批准号:8906937
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项目类别:Standard Grant
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资助金额:$6.07万
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财政年份:1989
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负责人:Surendra Shah
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依托单位:
Center for Science and Technology of Advanced Cement-Based Materials
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批准号:8808432
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项目类别:Cooperative Agreement
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资助金额:$561.1万
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财政年份:1989
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负责人:Surendra Shah
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依托单位:
A System for Microscopic Image Analysis for Studying Fracture Toughness of Cement Composites
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批准号:8704759
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项目类别:Standard Grant
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资助金额:$6.38万
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财政年份:1987
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负责人:Surendra Shah
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依托单位:
Long-Term Ductility of Glass Fiber Reinforced Concrete Panels
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批准号:8520361
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项目类别:Continuing Grant
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资助金额:$17.63万
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财政年份:1986
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负责人:Surendra Shah
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依托单位:
Effects of Grain Size, Strain Rate, and Moisture in the RockFracture Process Zone
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批准号:8314442
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项目类别:Continuing Grant
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资助金额:$13.2万
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财政年份:1984
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负责人:Surendra Shah
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依托单位:
U.S.-Sweden Joint Seminar: Problems and Prospects for Fiber-Reinforced Concrete, Stockholm, May l985
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批准号:8411857
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项目类别:Standard Grant
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资助金额:$1.94万
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财政年份:1984
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负责人:Surendra Shah
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依托单位:
Cyclic Stress-Strain Curves For Confined Concrete
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批准号:8120774
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项目类别:Standard Grant
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资助金额:$10.73万
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财政年份:1982
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负责人:Surendra Shah
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依托单位:
Fracture Process Zone and R-Curves For Cementitious Composites (Structural Mechanics)
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批准号:8203100
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项目类别:Continuing Grant
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资助金额:$16.18万
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财政年份:1982
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负责人:Surendra Shah
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依托单位:
海外基金