Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Performance Evaluation of Red Clay Binder with Epoxy Emulsion for Autonomous Rammed Earth Construction

Version 1 : Received: 9 August 2020 / Approved: 10 August 2020 / Online: 10 August 2020 (06:21:39 CEST)

A peer-reviewed article of this Preprint also exists.

Kim, J.; Choi, H.; Yoon, K.-B.; Lee, D.-E. Performance Evaluation of Red Clay Binder with Epoxy Emulsion for Autonomous Rammed Earth Construction. Polymers 2020, 12, 2050. Kim, J.; Choi, H.; Yoon, K.-B.; Lee, D.-E. Performance Evaluation of Red Clay Binder with Epoxy Emulsion for Autonomous Rammed Earth Construction. Polymers 2020, 12, 2050.

Journal reference: Polymers 2020, 12, 2050
DOI: 10.3390/polym12092050

Abstract

Existing rammed earth construction methods have disadvantages such as increased initial costs for manufacturing the large formwork and increased labor costs owing to the labor-intensive construction techniques involved. To address the limitations of existing rammed earth construction methods, an autonomous rammed earth construction method is introduced herein. As this autonomous rammed earth construction method uses a modular formwork, alternative materials must be used in the construction to satisfy the requirements for the early-age binder performance. Accordingly, this study evaluates the use of an epoxy emulsion composed of epoxy and a hardener to enhance the performance of the binder. Preliminary experiments were conducted to determine the optimal formulation of the epoxy emulsion, following which the compressive strength, water loosening, shrinkage, rate of mass change, and microstructure of several red clay binder specimens with and without epoxy emulsion were analyzed at early ages. The results confirmed that the epoxy emulsion can be applied to satisfy the performance requirements for autonomous rammed earth construction by improving the durability and strength of the binder at early ages.

Subject Areas

autonomous rammed earth construction; red clay; epoxy emulsion; mechanical properties; microstructure

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