| 摘要 |
FIELD: nondestructive testing. ^ SUBSTANCE: method comprises drilling hole in concrete, securing anchor device inside the hole, and pulling out the anchor with applying destroying force. The strength of concreter is determined form the formula , where N is the destroying force, D is the diameter of the specimen, m, and d is the diameter of the hole, m. ^ EFFECT: enhanced accuracy of determining. ^ 1 dwg, 1 ex |
