LAP Lambert Academic Publishing Early Age Thermal Cracking in Concrete Structures: New Experimental Tests in Internal and External Factors Influencing on the Early Age Thermal Cracking

In this book has been shown that the early age thermal cracking in concrete structures resulted from either internal restraint caused by differential expansion within concrete member during heating due to larger temperatures gradient between the core, and that the adjacent media or by external restraint to contract on cooling from a temperature peak of the concrete specimen are the critical factors in developing early age thermal cracking. It has been found that the temperature differential that causes early age thermal cracking in concrete is greater than that figure found in previous research. Other factors influencing the development of the thermal cracking were investigated and recommendations on controlling the early age thermal cracking are given. The experimental technique carried out in this research investigation is an improvement on the past research on the early age cracking and the effects of internal and external restraints were studied. Further methods of assessing the risk of the early age thermal cracking in mass concrete under natural environmental conditions developed and the results are compared with those under laboratory conditions. About the Author Dr.Tajik is an experienced,well known expert in concrete industry in the Middle East environment.He was General Governor of Hormozgan,Iran. Advisor to Building and Housing Research Centre,General Director of the Housing and Urban Development,Director Manager of the Islamic Revolution Housing Foundation and Consultant in mass concrete projects.