Alternative Method for Concrete Structures Compressive Strength Estimation with Small-Scale Destruction  

作　　者：Achfas Zacoeb Koji Ishibashi 

机构地区：[1]Department of Civil Engineering, Brawijaya University, Indonesia [2]Department of Civil Engineering, Saga University, Japan

出　　处：《Journal of Civil Engineering and Architecture》2011年第2期147-153,共7页土木工程与建筑（英文版）

摘　　要：To estimate a compressive strength from existing concrete structures by core drilling are usually gathered with a diameter specimen of 100 mm or three times of maximum coarse aggregate size and examined by uniaxial compressive strength （UCS）. It is relatively difficult to gather a large sized core, and a pit place will be limited by main members. To get an alternative solution with smaller specimen, point load test （PLT） has been sele,：ted which is a simple test and widely accepted in rock materials research, but relatively new in concrete. The reliability of PLT is evaluated by extracting a lot of core drilled specimen from ready mixed concrete blocks with maximum coarse aggregate size, G of 20 mm in representative of architectural structures and 40 mm in representative of civil structures on the range of concrete grade from 16 to 50. Compressive strengths were classified into general categories, conversion factors were determined, and scattering characteristics were also investigated. The relationship between point load index （Is） and compressive strength of concrete core specimen （fcc） can be written as linear approximation as fcc = k.Is- C.

关 键 词：Strength estimation small core point load index linear approximation. 

分 类 号：TU459[建筑科学—岩土工程] TU375[建筑科学—土工工程]