Comparative study on protective measures against spalling slab concrete

Abstract

Concrete spelling is a major problem in reinforced concrete structures, especially in the public buildings, which were constructed some time ago. In Sri Lanka, many public buildings like schools and hospitals have this problem. Generally, authorities prohibit the use of the building area, where there is potential for concrete spalling instead of immediately repairing, because the repairing work is expensive and time consuming. This research is to study economical protective measures to prevent falling of spalled cover concrete chunks until the proper repair is done. This paper reports the results of an experimental program involving eight small scale concrete slab panels, which were installed with four different materials. Eight concrete slab panels were casted first and after 28 days the materials were installed with two distinct installation methods. The panels were subjected to area loads and failure loads were recorded. This paper includes the findings according to the observations made during the panel testing.