State of the Art: Mechanical Properties of Ultra-High Performance Concrete

Abstract

During the past decades, there has been an extensive attention in using Ultra-High Performance Concrete (UHPC) in the buildings and infrastructures construction. Due to that, defining comprehensive mechanical properties of UHPC required to design structural members is worthwhile. The main difference of UHPC with the conventional concrete is the very high strength of UHPC, resulting designing elements with less weight and smaller sizes. However, there have been no globally accepted UHPC properties to be implemented in the designing process. Therefore, in the current study, the UHPC mechanical properties such as compressive and tensile strength, modulus of elasticity and development length for designing purposes are provided based on the reviewed literature. According to that, the best-recommended properties of UHPC that can be used in designing of UHPC members are summarized. Finally, different topics for future works and researches on UHPC’s mechanical properties are suggested.

Structural Behavior of Ultra-High-Performance Concrete Beams Under Flexural and Shear Action: A Review

“…The design elastic modulus (Ecd) is given by: Ecd = Ecm 1.3 (25) Ecm is the mean value of elastic modulus. The compression strain at maximum loading (Ԑc2) is given by: Ԑc2 = 𝑓𝑐𝑑 𝐸𝑐𝑑 (26) Ԑc2 is used when UHPC is without fibers or little fiber content, i.e., when the brittle behavior dominates. However, when fiber content is relatively high, the softening behavior occurs, and it must be considered in the design to represent the post-peak strain beyond Ԑc2.…”

“…The very high compressive strength of UHPC leads to the design of structural members with smaller sizes and lightweight than the NSC or HSC under the same loading [26].…”

Non-linear Analysis of Slender High Strength Concrete Column

“…This is the main factor in the evaluation of the bearing capacity of the supports. Its correct estimate is subject of continuous research [24,25,26,27]. ACI 318 sets out two different equations for determining flexural rigidity.…”

Enhancing Resiliency and Delivery of Bridge Elements using Ultra-High Performance Concrete as Formwork

“…Acknowledging the need to reduce these interventions, durable material, such as ultra-high performance concrete (UHPC), has recently been used for strengthening and repair of existing structures. Past research has shown improvement in the structural performance of existing structures when UHPC is used as a retrofitting material (1)(2)(3)(4). The high density, low permeability, and chloride resistance of UHPC makes it an ideal protective layer against corrosion, weathering, and chemical attack (5).…”