Abstract
The reinforcing steel in concrete corrodes due to carbonation or chloride contamination of cover concrete. Apparent volume of corroded reinforcement is larger than original one, and expansion of reinforcement induces the pressure. Progresses of corrosion, the pressure of corrosion products makes cover concrete cracked, and then spalled. The piece of spalling may hurt someone.
In this paper, a modeling method of corrosion pressure is introduced. The maximum pressure and apparent volume increase of corroded steel are proportional to cover depth, and inverse proportional to length of corrosion. The scenario for avoiding spalling accident with the statistics is proposed.
