Years of Research has demonstrated the close link between cracking and temperature variation process within mass concrete. To prevent cracking, years of practices and in-depth research have been conducted on revealing mechanism of temperature cracking and effects of various controlling measures. However, concrete cracking is not vanishing consequently. It is still trapping engineers. For instance, during design and construction of Xiaowan double-curvature arch dam in China, strict measures have been incorporated in materials and construction technics to prevent cracking according to experimentation and simulation results, but 16 cracks were found in 6 monoliths in the initial stage of construction