A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The objective of this investigation was to develop a better understanding of the fracture machanism of concrete and to determine the concrete parameters effect on concrete fracture toughness. The fracture toughness of several pastes, motars, and concretes was determined by flexural tests of specimens containing flaws of various depths cast at the center of the tensile surface. Variables in the investigation were the water-cement ratio, sand-cement ratio, gravel-cement ratio, degree of hydration (age of specimens at testing), curing conditions, air content, sand gradation, and gradation and type of coarse aggregate. The pseudo-fracture toughness of concrete was not significantly affected by the fine aggregate content, air content, and water-cement ratio. Since the range of these parameters investigated is inclusive of most mix designs, they can be neglected in designing for a mix of high or low fracture toughness. Therefore, the variables affecting fracture toughness of concrete can be limited to the coarse aggregate content and grading of coarse aggregate. (BPR Abstract)
The objective of this investigation was to develop a better understanding of the fracture machanism of concrete and to determine the concrete parameters effect on concrete fracture toughness. The fracture toughness of several pastes, motars, and concretes was determined by flexural tests of specimens containing flaws of various depths cast at the center of the tensile surface. Variables in the investigation were the water-cement ratio, sand-cement ratio, gravel-cement ratio, degree of hydration (age of specimens at testing), curing conditions, air content, sand gradation, and gradation and type of coarse aggregate. The pseudo-fracture toughness of concrete was not significantly affected by the fine aggregate content, air content, and water-cement ratio. Since the range of these parameters investigated is inclusive of most mix designs, they can be neglected in designing for a mix of high or low fracture toughness. Therefore, the variables affecting fracture toughness of concrete can be limited to the coarse aggregate content and grading of coarse aggregate. (BPR Abstract)
Fracture Toughness of Portland Cement Concretes
1968
93 pages
Report
No indication
English
Fracture toughness of portland cement concretes
| Engineering Index Backfile | 1969
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