| dc.contributor.author | Forgeron, Dean Paul. | en_US |
| dc.date.accessioned | 2014-10-21T12:36:14Z | |
| dc.date.available | 2005 | |
| dc.date.issued | 2005 | en_US |
| dc.identifier.other | AAINR02116 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/54710 | |
| dc.description | In this thesis, current accelerated flexural fatigue loading and freezing and thawing test procedures were combined to investigate the influence of flexural fatigue damage on the freezing and thawing resistance of Plain Concrete (PC) and Fiber Reinforced Concrete (FRC). They were also used to establish the influence of freezing and thawing damage on the flexural fatigue endurance of PC and FRC. Flexural testing allowed the evaluation of the influence of combined conditioning on the residual flexural properties of PC and FRC. | en_US |
| dc.description | It is demonstrated in this thesis that flexural fatigue loading cycles caused a similar level of micro-cracking damage in PC and FRC specimens. The micro-cracking resulted in up to 21% reduction in flexural stiffness and a 25% decrease in flexural strength for PC after 2 million cycles between 10 and 40% of the 90-day flexural strength. Testing revealed that 300 cycles of freezing and thawing caused deterioration to a 6 mm thick layer of concrete on the surface of the specimens leaving the rest of the specimen unaffected. A reduction of 27% in flexural strength and 32% in flexural stiffness was noted for plain concrete. | en_US |
| dc.description | When combined, flexural fatigue cycles and freezing and thawing cycles caused an increase in the level of micro-cracking throughout the concrete matrix. The highest degree of damage occurred when concrete was exposed to flexural fatigue loading cycles before freezing and thawing cycles. Reductions in flexural strength and flexural stiffness of up to 27% and 33%, respectively, were noted after combined conditioning. The results showed that the presence of flexural fatigue damage accelerated the freezing and thawing deterioration process, while freezing and thawing damage actually improved the flexural fatigue performance of concrete. Therefore, fatigue damage was determined to be the critical deterioration mechanism that drives damage under combined conditioning. (Abstract shortened by UMI.) | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 2005. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Engineering, Civil. | en_US |
| dc.title | The combined effects of flexural fatigue cycles and freezing and thawing cycles on the flexural properties of plain and fiber reinforced concrete. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
