Open Journal of Civil Engineering, 2020, 10, 239-249 https://www.scirp.org/journal/ojce ISSN Online: 2164-3172 ISSN Print: 2164-3164 DOI: 10.4236/ojce.2020.103020 Aug. 27, 2020 239 Open Journal of Civil Engineering Unified Approach to Assess Engineering Performance of Fill Improved by Shallow to Deep Compaction Based Techniques Using Relative Density Ahmed Alaaeldin 1 , Emmanouil Spyropoulos 2 , Anas Orabi 3 1 Keller Grundbau GmbH, Dammam, KSA 2 Saudi Aramco, Dhahran, KSA 3 Keller Grundbau GmbH, Dubai, United Arab Emirates Abstract The setting of pre assessment criteria for soil compaction is hardly deter- mined, especially, in case of undecided structure locations. Different design guidelines recommend achieving a specific value of relative density for the compaction of fill placement works. Alternatives were discussed through the literature to predict the value of relative density based on soil field tests (e.g. cone and standard penetration tests). This paper presents the weakness of using the Over Consolidation Ratio (OCR) as guidance to assess the value of cone tip resistance using the soil relative density. The variation of OCR (from 1 to 10) has a significant effect on the q c value up to 110% when compared to the normally consolidated state. Then normally consolidated state can logi- cally cover the compaction process with variation of 20%, 33%, and 4% for relative density values 85%, 70%, and 60%, respectively. A unified approach is recommended to predict the compaction q c -performance line using normally consolidated condition and sand relative density. Keywords Compaction, Relative Density, Performance Specifications 1. Introduction In recent years, the field of construction has witnessed a great leap in building technologies with targeting a maximum cost saving. Nonetheless, the nature of How to cite this paper: Alaaeldin, A., Spyropoulos, E. and Orabi, A. (2020) Uni- fied Approach to Assess Engineering Per- formance of Fill Improved by Shallow to Deep Compaction Based Techniques Using Relative Density. Open Journal of Civil En- gineering, 10, 239-249. https://doi.org/10.4236/ojce.2020.103020 Received: August 6, 2020 Accepted: August 24, 2020 Published: August 27, 2020 Copyright © 2020 by author(s) and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access