Strength development, deformation properties and mix design of pulverized fuel ash concrete

Abstract

Discusses the properties of pulverized fuel ash (PFA) concrete both in its fresh and hardened states, with emphasis on aspects which are relevant to warmer localities such as Hong Kong. Sufficient research evidence, including surveys of existing structures, have been reviewed to conclude that PFA, when used correctly and properly, has the potential to enhance the performance of good concrete. Analyses the contribution of PFA in the enhanced performance of concrete. Cautions that much of the enhanced performance depends on the microstructure of the concrete, which in turn depends significantly on a proper mix design, with or without PFA. Proposes that water reduction is a desirable property of PFA. However, considers it possible to accommodate PFA characteristics in the mix design and by the use of plasticizer to produce good quality PFA concrete. Briefly discusses the characteristics of Hong Kong locally produced PFA.

Machine-Learning-Algorithm to predict the High-Performance concrete compressive strength using multiple data

“…While the concrete produced on site or ready-mix-concrete (RMC) plants is associated with many uncertainties including material and environment factors, most of the times, large variations are found in the compressive strength of same concrete mix, used for in-situ applications, RMC plants and lab-Crete (Tantri et al, 2021a(Tantri et al, , 2021b(Tantri et al, , 2021c. The use of real datasets from the industry are likely to contain more supplementary unaccountable differences, and their effects on the accuracy of concrete strength artificial prediction models still remain unknown (Ben Chaabene et al, 2020;DeRousseau et al, 2019;Balendran et al, 2002;Balendran and Pang, 1995;Ganesan, Rajagopal and Thangavel, 2007).…”

“…Designers and engineers have been working ways and means on to have an effective analytical/statistical tool to predict the hardened properties of conventional and special concretes (Ahmad et al , 2021; Loganathan et al , 2015; Loganathan and Gandhi, 2015). Extensive research is being conducted on determining the most convenient and reliable way to estimate the compressive strength (Abhishek et al , 2022; Balendran et al , 2002; Balendran and Pang, 1995; Ganesan et al , 2007).…”