Carol Shield, Professor, Civil Engineering
There are many attractive benefits to utilizing non-metallic reinforcement in concrete structures. Ideally reinforcing materials can be chosen and combined in such a way that the reinforcement will not corrode and will be unaffected by other environmental factors, such as the high alkalinity of the concrete. The use of this type of reinforcement will lead to a decrease in maintenance and an increase in the life of the structure. However, many questions still remain about the suitability of non-metallic materials for concrete reinforcement. In Minnesota, where there are large temperature swings annually, one key question is what effect fatigue will have on the bond strength between the reinforcement the concrete. The objective of this study is to examine this effect. A limited experimental program will be undertaken to examine the effect of thermal fatigue and mechanical fatigue on the bond strength between the reinforcement and concrete. Testing will be conducted using inverted half-beam specimens.