The Open Construction & Building Technology Journal

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A Reliable PSO-based ANN Approach for Predicting Unconfined Compressive Strength of Sandstones

Yasin Abdi1, Ehsan Momeni2, *, Reza Rashidi Khabir2
1 Faculty of Sciences, Lorestan University, Khorramabad, Iran
2 Faculty of Engineering, Lorestan University, Khorramabad, Iran



The reliable determination of geomechanical parameters of rocks such as Unconfined Compressive Strength (UCS) using laboratory methods is problematic and time-consuming. In this regard, the construction of reliable predictive models for assessing the UCS is of advantage.


The main purpose of this work is to propose the use of a reliable PSO-based ANN approach for predicting the UCS of sandstones.


For this purpose, laboratory tests were performed on 60 sandstone specimens. The laboratory tests comprise P-wave velocity, dry density, Schmidt hardness and UCS. Apart from the latter, the other laboratory tests were set as model inputs. Prediction performance of the constructed model was assessed according to the criteria including coefficient of determination (R2), Root Mean Squared Error (RMSE) and Variance Account For (VAF).


Results (R2= 0.974 and RMSE = 0.086 and VAF = 97.5) showed the reliability of the constructed PSO-based ANN model to predict UCS of sandstones.


Hence, this study recommends utilizing PSO-based ANN as a feasible tool for assessing UCS of sandstones. Nevertheless, further research is suggested for model generalization purposes.

Keywords: Unconfined compressive strength, Physical properties, Schmidt hardness, PSO-based ANN, Sandstones, Multilayer perceptron.

Article Information

Identifiers and Pagination:

Year: 2020
Volume: 14
Issue: Suppl-1, M5
First Page: 237
Last Page: 249
Publisher Id: TOBCTJ-14-237
DOI: 10.2174/1874836802014010237

Article History:

Received Date: 26/12/2019
Revision Received Date: 16/01/2020
Acceptance Date: 04/03/2020
Electronic publication date: 24/08/2020
Collection year: 2020

© 2020 Abdi et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Faculty of Engineering, Lorestan University, Khorramabad, Iran; Tel: +98 933 721 3322; E-mail:

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