Recent advances in understanding the role of supplementary cementitious materials in concrete

In this study, an extensive literature review has been conducted on the material characterization of UHPC and its potential for large-scale field applicability. The successful production of ultra-high performance concrete (UHPC) depends on its material ingredients and mixture proportioning, which leads to denser and relatively more homogenous particle packing. A database was compiled from various research and field studies around the world on the mechanical and durability performance of UHPC. It is shown that UHPC provides a viable and long-term solution for improved sustainable construction owing to its ultra-high strength properties, improved fatigue behavior and very low porosity, leading to excellent resistance against aggressive environments. The literature review revealed that the curing regimes and fiber dosage are the main factors that control the mechanical and durability properties of UHPC. Currently, the applications of UHPC in construction are very limited due to its higher initial cost, lack of contractor experience and the absence of widely accepted design provisions. However, sustained research progress in producing UHPC using locally available materials under normal curing conditions should reduce its material cost. Current challenges regarding the implementation of UHPC in full-scale structures are highlighted. This study strives to assist engineers, consultants, contractors and other construction industry stakeholders to better understand the unique characteristics and capabilities of UHPC, which should demystify this resilient and sustainable construction material.

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Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges

Durability of ultra-high performance concrete – A review

Incorporation of nano-materials in cement composite and geopolymer based paste and mortar – A review

A review on the mechanical properties of cement-based materials measured by nanoindentation

In this research the effects of nano-SiO 2 particles on the mechanical performance, hydration process and microstructure evolution of ultra-high performance cementitious composites were investigated by different methods. The results showed that the compressive and flexural strength increased with the increase of the nano-SiO 2 content up to 3% and due to agglomeration of nano-SiO 2 particles, the mechanical properties decreased slightly when the nano-SiO 2 content was more than 3%. The hydration process was accelerated by the addition of nano-SiO 2 . The porosity and the average pore diameter decreased with the increase of the nano-SiO 2 content and aging. The microstructure was more homogenous and dense for nano-SiO 2 specimens as compared to the control specimen. All of these improvements could be mainly attributed to the pozzolanic and filler effects of nano-SiO 2 .

Effects of nano-SiO2 particles on the mechanical and microstructural properties of ultra-high performance cementitious composites

Effect of silica fume and fly ash on hydration and microstructure evolution of cement based composites at low water–binder ratios

The effects of metakaolin (MK) on the mechanical and microstructural properties of ultra-high performance cement-based composite (UHPCC) were studied in this paper. The microstructure of UHPCC was ...

Zhidan Rong

Papers

Effects of nano-SiO2 particles on the mechanical and microstructural properties of ultra-high performance cementitious composites

Effect of silica fume and fly ash on hydration and microstructure evolution of cement based composites at low water–binder ratios

Effects of metakaolin on mechanical and microstructural properties of ultra-high performance cement-based composites

Optimization design and microstructure analysis of ultra-high performance cement-based composites