Early Age Cracks of Concrete Casted in Different Stages
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Bibliographic Details
| Author(s): |
Rana Embaby
(Structure Engineer, Dar al-Handasah, Cairo, Egypt.)
Ayman Embaby (Professor Ain Shams University, Cairo, Egypt; Senior Structure Engineer, Dar al-Handasah, Cairo, Egypt.) Charles Malek (Director of Structure and Bridge Departement, Dar al-Handasah.) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 1655-1662 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818359069 | ||||
| Abstract: |
Massive concrete elements are occasionally casted in different stages. Along with accounting for the safe transmission of shear flow between the different casted stages, the constraint imposed by the hardened concrete to the newly casted concrete is to be considered. This may require special reinforcement to avoid propagated cracks due to shrinkage as well as thermal effects. The demand of adding shrinkage reinforcement was revealed through parametric study accounting for geometrical, construction, material, and environmental parameters. For this purpose finite element analysis was incorporated in which time-dependent material characteristic is accounted for. Moreover, heat of hydration as well as shrinkage is modeled. The prediction of the tensile stresses is carried out and accordingly the reinforcement demand is highlighted. |
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| Keywords: |
temperature construction stage heat of hydration casting schedules massive concrete
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