Influence of Heating and Cooling Temperature on the Performance of Tensile Interfacial Bond between High Strength Concrete and Ultra High Performance Concrete (UHPC)

Semendary, Ali A.; Akentuna, Moses; Steinberg, Eric P.; Hamid, Waleed K.

doi:10.21838/uhpc.9632

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As illustrated in Figure 6, little change is observed after 28 days with an average of 0.01175% at 90 days. was 16.83 x 10 -6 while for the alternative test was 17.44 x 10 -6 mm/mm/ o C. This value is slightly above the recommended value of 13 x 10 -6 mm/mm/ o C by the Canadian Bridge Code but agrees with the range of values reported in the literature (Graybeal, 2006;Ahlborn et al 2008;Semendary et al 2019). The higher CTE value compared to conventional concrete is because this property highly depends on the CTE of the individual constituents of concrete.…”

Section: Shrinkagesupporting

confidence: 86%

“…As a standard, the CSA prescribed inverse analysis was not found to be adequately robust in obtaining the tensile properties of UHPFRC. This is also proven by advanced computational simulations (Ralli et al, 2021) In the current development of the Annex, a different method for characterization of the material in tension is considered. The new approach quantifies the strain energy absorbed by the beam under flexure and throughout the range of the elastic and hardening part of the response.…”

Section: Tensile Response Using Inverse Analysismentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of CSA Prequalification Procedures of UHPC Materials for Bridge Construction

Ralli

Husain²,

Pantazopoulou

et al. 2023

Third International Interactive Symposium on Ultra-High Performance Concrete

View full text Add to dashboard Cite

Canadian Bridges are particularly vulnerable to corrosion and long-term durability problems initiated by the easy fracture and delamination of concrete under combined stress and climatic exposure. UHPC is an alternative construction material that holds great promise to alleviate many of those durability and strength problems both in new construction and in retrofitting. While only recently it was considered an emerging material, UHPC is now implemented in infrastructure, necessitating full understanding of material behavior with ultimate goal to exploit its unique properties in design practices. In this study, a proprietary UHPC mix produced by DURA Canada is used to assess the material characterization techniques prescribed by Canadian Standards Association (CSA) for UHPC materials. This research serves as a case study for proof testing the repeatability and robustness of the prequalification procedures specified by the2019 CSA Standards, in light of the fact that these procedures have only been recently drafted and introduced in the Code. Additional objective is to evaluate the material's compliance with requirements for abrasion, salt scaling, absorption, chloride ion penetration, and freeze thaw resistance according to the different standards used by the Canadian Industry as well as time dependent properties such as creep, shrinkage, and coefficient of thermal expansion. Finally, this paper will present in detail the specimen preparation and testing, as well as the challenges encountered, lessons learnt and recommendations for future editions of the code.

show abstract

Section: Shrinkagesupporting

confidence: 86%

Section: Tensile Response Using Inverse Analysismentioning

confidence: 99%