METHOD AND APPARATUS FOR ESTIMATION OF STRENGTH OF CONCRETE
PROBLEM TO BE SOLVED: To estimate the compressive strength of concrete with high accuracy by a nondestructive testing method. SOLUTION: The repulsion degree Rs on the surface of the concrete as a measuring object is measured by a concrete test hammer 14, and its carbonization depth C is measured by...
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| creator | YONEZAWA TOSHIO SEKO SHIGEKI OSHIDA FUMIO ODAKAWA MASAO MITSUI TATEO |
| description | PROBLEM TO BE SOLVED: To estimate the compressive strength of concrete with high accuracy by a nondestructive testing method. SOLUTION: The repulsion degree Rs on the surface of the concrete as a measuring object is measured by a concrete test hammer 14, and its carbonization depth C is measured by a carbonization-depth measuring machine 16. In an apparatus mainframe 12, a surface-hardness correction coefficient β as the ratio of the hardness in a carbonized surface part of the concrete to the hardness of the noncarbonized inside is stored so as to be related to the carbonization depth C of the concrete. As the correction coefficient β, a value corresponding to a measured value of the carbonization depth C is set, a correction repulsion degree Ri corresponding to the repulsion degree at the inside of the concrete is found by Ri=β×Rs-(1-β)×b/a, and the compressive strength Fc is estimated and computed based on the correction repulsion degree Ri. COPYRIGHT: (C)2003,JPO |
| format | Patent |
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SOLUTION: The repulsion degree Rs on the surface of the concrete as a measuring object is measured by a concrete test hammer 14, and its carbonization depth C is measured by a carbonization-depth measuring machine 16. In an apparatus mainframe 12, a surface-hardness correction coefficient β as the ratio of the hardness in a carbonized surface part of the concrete to the hardness of the noncarbonized inside is stored so as to be related to the carbonization depth C of the concrete. As the correction coefficient β, a value corresponding to a measured value of the carbonization depth C is set, a correction repulsion degree Ri corresponding to the repulsion degree at the inside of the concrete is found by Ri=β×Rs-(1-β)×b/a, and the compressive strength Fc is estimated and computed based on the correction repulsion degree Ri. 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| subjects | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING |
| title | METHOD AND APPARATUS FOR ESTIMATION OF STRENGTH OF CONCRETE |
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