Effect of capping on the compressive strength of concrete cubes

Abstract

Summary This paper describes the effect of various methods of capping on the compressive strength of concrete. It was found that capping the concrete faces with a molten mixture of sulphur, sand and carbon black gives the least scatter of test results and strength values which appear most representative. With some capping materials, however, a reduction of about 10 to 50 per cent in strength was obtained.