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      Compressive and Flexural Strengths of EVA-Modified Mortars for 3D Additive Construction

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          Abstract

          The compressive and flexural strengths of mortars modified with ethylene-vinyl acetate (EVA) were experimentally investigated for use in three-dimensional (3D) additive construction (3DAC). EVA powder, which is available in a premix type, was employed as an admixture. The test results for the cast specimens showed that, at a curing age of 28 days, the compressive strengths ranged from 32.92 MPa to 43.50 MPa, and the flexural strengths ranged from 12.73 MPa to 14.49 MPa. The compressive and flexural strengths of the printed specimens were relatively lower: 23% to 26% and 3% to 7%, respectively. The compressive strength also decreased and the flexural strength increased when the EVA/cement ratio was increased. The results of the experiment reveal that the EVA-modified mortar had a high rate of strength development early on, making the material advantageous for use in 3DAC. It was determined that the appropriate EVA/cement ratio ranged between 5% and 15%. However, the printed specimens exhibited lower compressive and flexural strengths than did the cast specimens, and the compressive strength decreased as the EVA content was increased. This study provides the compressive and flexural strengths of common EVA-modified mortars, important data for 3DAC applications.

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          Hardened properties of high-performance printing concrete

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            Automated construction by contour crafting—related robotics and information technologies

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              Large-scale 3D printing of ultra-high performance concrete – a new processing route for architects and builders

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                15 August 2019
                August 2019
                : 12
                : 16
                Affiliations
                [1 ]Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon, Gangwon 24341, Korea
                [2 ]North Gyeonggi Branch, Joongbu Division, Korea Conformity Laboratories, Pocheon, Gyeonggi 11184, Korea
                [3 ]Department of Engineering and Technology, Texas A&M University-Commerce, Commerce, TX 75429, USA
                Author notes
                [* ]Correspondence: jaeheum.yeon@ 123456tamuc.edu ; Tel.: +1-903-468-8115
                Article
                materials-12-02600
                10.3390/ma12162600
                6720283
                31443213
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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