Thermal dilation and autogenous shrinkage are produced by the continuedrnhydration of cement, this volume changes are partly or wholly restrained, andrntherefore they induce stress. This is issue for massive concrete especially atrnearly age when concrete is immature. This thesis presents assessment on therntendency of cylindrical axisymmetric strictures and massive wall at early age withrnmultiple thickness and placement temperatures. This master thesis focuses onrnassessment of cracking tendency of massive concrete structures which arernsubjected to realistic field temperature boundary conditions at early age. Thernassessment is based on the analysis results of analytical models. This work alsornshows the efficiency of precooling method in controlling of temperaturerndifferential and cracking tendency structures by comparing with referencernplacement temperature (placement temperature without introducing pre cooling). rnAt early age, the core of thin sections of mass concrete structures have highrntendency of cracking. The reason is that the high temperature drops of the corernduring cooling phase. Cracking tendency at cores of thin sections is high at highrnplacement temperature. This susceptibility of cracking of thin section structuresrnare controlled by precooling method. Similarly surface of mass concreternstructures are susceptible for cracking at early age in moderately hot weather.rnThe tendency of surface cracks can be significantly minimized by reducing thernplacement temperature but for thick sections precooling method shouldrncombined with other temperature differential controlling methods (e.g. surfacerninsulation) to minimize surface early age cracking tendency.