STATE-OF-THE-ART APPLICATIONS OF THE PULL-OFF TEST IN CIVIL ENGINEERING
In 1973-1974 the collapse of the roofs made of prestressed High Alumina Cement(HAC) in the UK resulted in an immediate need for evaluating the conditions of the existingstructures made from HAC,leading to an increasing awareness of the need for an in-situ testthat would not seriously weaken members under investigation but would give a reliableestimate of the concretes compressive strength. In 1974,the concept of using pull-off test asa means of predicting the compressive strength of concrete was patented in the UK byProfessor Long at Queens University Belfast. Substantial continuous developments havebeen taking place since then in Queens University Belfast in the past 30 years. Initially,thepull-off test was developed primarily aiming at unplanned in-situ strength determination. Itwas found later that it is also particularly suited for assessment of bond strength of repairs. The pull-off test has now been accepted in British Standards,BS 1881-207:1992 as one ofthe standard tests for assessing the in-situ concrete strength in structures and BS EN1542:1999 as a standard test for assessing the bond strength between overlays and substrateconcrete in patch repairs. BS 1881-201:1986 recommends that the pull-off test is also usefulin quality control and long term monitoring. It has also been accepted in North America(ASTM C1583-04),Holland and some other countries as a standard test for similarapplications. This paper reviews the development history of the pull-off test,its principle,factors affecting the test results as well as its current applications in civil engineering fields.
bond strength in-situ strength partially destructive test pull-off test repair
Y. Bai P.A.M. Basheer D.J. Cleland A.E. Long
Queens University Belfast,U.K.
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
1303-1309
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）