抄録
It is the main purpose of this study to obtain information on bond strength of reinforcing bars for lightweight concrete as compared with that for normal river sand and gravel concrete. The influences of surface characteristic of reinforcing bars and methods of test were also investigated. Four types of bars were tested and three kinds of methods of test (pullout test, tension test and long prism test) were chosen.
From the tests the following results were obtained and conclusions drawn:
(1) The test date show no difference in bond strength between lightweight concrete and normal concrete, so far as both the kinds of concrete are equal in compressive strength.
(2) There is correlation among the test results by three different test methods.
(3) The pullout test gives the most reasonable measure to evaluate the relative effectiveness of reinforcing bars in respect of the anchorage bond.
(4) The long prism test serves to evaluate the effectiveness of the bars for controlling cracks.
