Concrete with Reduced Cracking

In 2007, 3 state-of-the-art reports (STARs) within COIN - the Concrete Innovation centre - were made on different approaches to achieve concrete with less cracking; 1) “reduced cracking by admixtures and additives” [1] covering shrinkage reducing admixtures (SRAs) and expansive agents, 2) “reduced cracking by fibers” [2] encompassing the use of fibers to reduce crack width and 3) “reduced cracking by internal curing” [3] dealing with mitigation of shrinkage cracks caused by for instance self-desiccation using internal water reservoirs like saturated fine light weight aggregate (LWA) or cellulose fibers. This paper summarizes the findings from these 3 STARs and directions for research within this activity for coming years.