This document provides an introduction to Ultra-High Performance Concrete (UHPC), including its key properties. UHPC has very high compressive and tensile strengths due to its reduced porosity and improved microstructure from the addition of discontinuous fibers. It also has enhanced durability and dimensional stability. Some key properties discussed include UHPC's high compressive strength above 21.7 ksi, tensile strength above 0.72 ksi, lower drying shrinkage compared to normal concrete, and improved resistance to chloride ion penetration and carbonation. In conclusion, UHPC exhibits high strength, dimensional stability, durability and toughness due to its dense microstructure and inclusion of fibers.

1. Ultra-High Performance
Concrete (UHPC)
Name: Hammad 石文迪
Student ID: 194818004

2. Content
• Introduction
• Properties of UHPC
• Conclusion
• References
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3. Introduction
“UHPC-class materials are cementitious based composite
materials with discontinuous fiber reinforcement,
compressive strengths above 21.7 ksi, tensile strengths above
0.72 ksi, and enhanced durability via their discontinuous pore
structure.” [1]
Basic four principles of UHPC are
• Reduction in porosity
• Improvement in microstructure
• Increase in toughness
• Enhancement in homogeneity 3

4. Introduction
• Improvement in microstructure
ITZ in Conventional Mortar ITZ in UHPC [1]
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5. Introduction
• Improvement in microstructure
SEM image of hardened paste in UHPC [1] 5

6. Introduction
• Increase in Toughness
Energy-absorbing mechanisms of fibres–matrix [1] 6

7. Properties of UHPC
• Strength
The stress-strain curve (compressive) based on cylinder test of the specimens: a)
UHPC, and b) NC [2]
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8. Properties of UHPC
• Strength
The influence of GGBFS content on compressive strength
of UHPC (STD: Standard curing, SC: Steam curing, AC:
Autoclave curing) [3]
The effect of pressure application before and during
setting on compressive Strength [3]
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9. Properties of UHPC
• Strength
The stress-displacement curve (Brazilian test): a) UHPC, and b) NC [2]
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10. Properties of UHPC
• Dimensional Stability
Drying shrinkage of UHPC with different water-to-binder ratios under various
curing age [1]
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11. Properties of UHPC
• Durability
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[1]

12. Properties of UHPC
• Durability
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[1]

13. Conclusion
UHPC has following key properties
• High compressive ( > 21.7 ksi) and tensile
strength.
• High dimensional stability
• High durability and toughness
• Less porosity and permeability
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14. References
1. Shi, Caijun, et al. "A review on ultra high performance
concrete: Part I. Raw materials and mixture
design." Construction and Building Materials 101
(2015): 741-751.
2. Tam, C. M., Tam, V. W., & Ng, K. M. (2012). Assessing
drying shrinkage and water permeability of reactive
powder concrete produced in Hong Kong. Construction
and Building Materials, 26(1), 79-89.
3. Yazıcı, Halit, et al. "Mechanical properties of reactive
powder concrete containing high volumes of ground
granulated blast furnace slag." Cement and Concrete
Composites 32.8 (2010): 639-648.
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15. Thank You
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