INNOVATIVE TRANSIENT THERMAL GRADIENT CONTROL TO PREVENT EARLY AGED CRACKING OF MASSIVE CONCRETE

摘要

The height in more than 1 meter prevention of mass concrete (Fig. 1) (Fig. 3) occurs during the initial curing of casting thickness and aquation, but a thermal stress is generated as it, the heat of hydration can cause a crack cause by the temperature difference between inside and outside, as cooling (Fig. 4). It attempts to reduce such crack, but uses water, ice, cooling water pipe now, and outdoor temperature when the cooling heat of hydration is not to solve. Temperature, crack is generated in the cooperation with other reasons (such as degeneration) wherein, uses live load, fatigue loading, the temperature of structure leads to a synergistic effect, more great growths in crack, and the immediate cause that can be structure cannot be destroyed or fitness for use. This problem solved according to the present invention uses heating element (pipe in addition to traditional cooling water pipe, heating plate, or heat supply pipeline) and (1,2), by the temperature for controlling each cooling/heating element (8), the temperature difference is minimized between inside and outside to emphasize to structure and (9,10) it works, is cracked by these compactings, and (11,12), (figure for overcoming position height or the weight of mass concrete 1 to limit) proposes a technology.