The objectives of this research are to develop a program which can predict cracks due to the hydration heat at early aged concrete, to develop low heat cement to basically reduce hydration heat in a point of material view, and finally to verify the ef...
The objectives of this research are to develop a program which can predict cracks due to the hydration heat at early aged concrete, to develop low heat cement to basically reduce hydration heat in a point of material view, and finally to verify the efficiencies of those by applying to pratical field. Principles of crack occurrence are studied and various materials and cooling methods for the control of thermal cracks are investigated in the first year study. Through those studies, a program which temperature change and thermal stress can be analyzed in a three dimension is developed. Developed low heat cement, in addition, and other conventional cements are compared in terms of chemical and physical characteristics. This report also presents the superiority of the developed cement to others by comparing adiabatic temperature rise, compressive and tensile strength, bleeding, setting time, elastic modulus, resistance to chloride ion penetration and so on. The optimized block size and lift height are obtained theoretically by applying to practical field of Kwang An Grand Bridge which is under construction.