Modelling uniaxial compressive strength of lightweight self-compacting concrete using random forest regression

By Junfei Zhang, Guowei Ma, Yimiao Huang, Junbo Sun, Farhad Aslani, B. Nener. Construction and Building Materials, 2019

368 citations recorded by the source corpus.

Abstract Self-compacting concrete (SCC) can achieve compaction into every part of the formwork through its own weight without any segregation of the coarse aggregate. Lightweight concrete (LWC) can reduce the dead load of the structure by incorporating the lightweight aggregate (LWA). In recent years, more and more studies have focused on combining the advantages of SCC and LWC to produce lightweight self-compacting concrete (LWSCC). As one of the most important mechanical properties, uniaxial compressive strength (UCS) values need to be tested before field application of this new material. However, conducting UCS tests with multiple influencing variables is time-consuming and costly. To address this issue, this paper proposed, for the first time, a beetle antennae search (BAS) algorithm based random forest (RF) model to accurately and effectively predict the UCS of LWSCC. This model was developed and verified using data from LWSCC laboratory formulation. Results show that BAS was efficient in searching the optimum hyper-parameters of RF. The proposed BAS-RF model achieved high predictive accuracy indicated by a high correlation coefficient (0.97). In addition, by measuring the variable importance, we conclude that temperature was the most sensitive to UCS development, followed by scoria content and water-to-binder (w/b) ratio, while UCS was less sensitive to fiber content. This pioneering work provides a simple and convenient method for evaluating UCS of LWSCC at varying temperatures.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/c82c42d5b8c68d6f79b6a5444a9bcb7286602eca

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In Civil and Structural Engineering

Citations in the corpus

Compressive Strength of Fly-Ash-Based Geopolymer Concrete by Gene Expression Programming and Random Forest (2021, background): “+e adamant results were obtained in the prediction of compressive strength of self-compacting concrete with antenna search-based RF algorithm [47].”
Prediction of the Strength of Rubberized Concrete by an Evolved Random Forest Model (2019, methodology): “In this paper, the proposed model was trained and validated on the 70% dataset and tested on the other 30% dataset [21].”