Mechanical, durability and microstructural characteristics of ultra-high-strength self-compacting concrete incorporating steel fibers

Development of an eco-friendly Ultra-High Performance Concrete (UHPC) with efficient cement and mineral admixtures uses

“…Due to the relatively dense and homogenous microstructure of RPC, its maximum compressive strength can even exceed 200 MPa [4,5]. However, with the quickly developing construction industry, concrete expect the compressive strength is also required to have high flexural strength, workability and durability, which resulted the development of Ultra-High Performance Concrete (UHPC) and Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) [6][7][8]. Nevertheless, as the sustainable development is currently a pressing global issue and various industries have strived to achieve energy savings, the high material cost, high energy consumption and CO 2 emission for UHPC are the typical disadvantages that restrict its wider application [9][10][11].…”

“…By far, the measures pursued to reduce the economic and environmental disadvantages of UHPC are limited in most cases to the application of industrial by-products or waste materials without sacrificing the UHPC performance [7,8,[12][13][14][15]. Nevertheless, in most cases in the literature, for the mix design of UHPC, the amounts of mineral admixtures (e.g.…”

“…fly ash (FA), ground granulated blast-furnace (GGBS), limestone powder (LP) and silica fume (SF)) are given directly, without any detailed explanations or theoretical support. Moreover, due to the complex cementitious system of UHPC (extremely low water amount and relatively high SP content), the influence of different mineral admixtures on the hydration kinetics and properties of UHPC still needs further clarification [6][7][8][11][12][13][14][15]. As commonly known, GGBS has hydraulic properties although the rate of the reaction with water is low [16].…”

Chloride Resistance Behavior on Nano-Metaclayed Ultra-High Performance Concrete

“…Regards to this, the ultra-high performance concrete (UHPC) has been introduced as a new class and one of the most advanced concrete which it has better characteristics in term of strength and durability [6][7][8]. The use of industrial or agricultural by-product substitutions for cement has greatly contributed to boost up the performance characteristics of the concrete [9][10][11]. Therefore, the UHPC incorporating material as supplementary cementitious materials (CSM) and nano material has been developed.…”

Flexural behaviour and punching shear of selfcompacting concrete ribbed slab reinforced with steel fibres

“…SFRSCC combines the benefits of SCC at fresh state with high workability as well as its improvement of the properties at hardened state with addition of the steel fibres [7]. Steel fibres has the ability to improve the properties of SCC elements including tensile strength, ductility, toughness, energy absorption capacity [8], [9], fracture toughness [1], [10], [11] as well as cracking resistance [12]. Owing to the positive effects of steel fibres in enhancing the concrete materials properties especially by its contribution against crack propagation and enhancement in ductility, current research is now moving towards investigating the function of the fibres as the reinforcing material to partially or totally replace conventional reinforcements in concrete structures [13].…”