{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,26]],"date-time":"2026-04-26T22:37:15Z","timestamp":1777243035138,"version":"3.51.4"},"reference-count":43,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2020,11,2]],"date-time":"2020-11-02T00:00:00Z","timestamp":1604275200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Land, Infrastructure and Transport of Korea","award":["Grant 20AUDP-B121595-05"],"award-info":[{"award-number":["Grant 20AUDP-B121595-05"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Recently, 3D concrete printing has progressed rapidly in the construction industry. However, this technique still contains several factors that influence the buildability and mechanical properties of the printed concrete. Therefore, this study investigated the effects of the nozzle speed, the interlayer interval time, the rotations per minute (RPMs) of the screw in the 3D printing device, and the presence of lateral supports on the buildability of 3D concrete printing. In addition, this paper presents the results of the mechanical properties, including the compressive, splitting tensile, and flexural tensile strengths of 3D printed concrete. The buildability of 3D printed structures was improved with an extended interlayer interval time of up to 300 s. The printing processes were interrupted because of tearing of concrete filaments, which was related to excessive RPMs of the mixing screw. The test results also showed that a lateral support with a wide contact surface could improve the resistance to buckling failure for 3D printed structures. The test results of the mechanical properties of the 3D printed concrete specimens indicated that the compressive, splitting tensile, and flexural tensile strengths significantly depended on the bonding behavior at the interlayers of the printed specimens. In addition, although metal laths were expected to improve the tensile strength of the printed specimens, they adversely affected the tensile performance due to weak bonding between the reinforcements and concrete filaments.<\/jats:p>","DOI":"10.3390\/ma13214919","type":"journal-article","created":{"date-parts":[[2020,11,2]],"date-time":"2020-11-02T09:04:46Z","timestamp":1604307886000},"page":"4919","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":94,"title":["Buildability and Mechanical Properties of 3D Printed Concrete"],"prefix":"10.3390","volume":"13","author":[{"given":"Changbin","family":"Joh","sequence":"first","affiliation":[{"name":"Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi 10223, Korea"}]},{"given":"Jungwoo","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi 10223, Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6575-6322","authenticated-orcid":false,"given":"The Quang","family":"Bui","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Kunsan National University, Kunsan, Jeonbuk 54150, Korea"}]},{"given":"Jihun","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Kunsan National University, Kunsan, Jeonbuk 54150, Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1937-0610","authenticated-orcid":false,"given":"In-Hwan","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Kunsan National University, Kunsan, Jeonbuk 54150, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,2]]},"reference":[{"key":"ref_1","unstructured":"Hull, C.W. (1986). Apparatus for Production of Three-Dimensional Objects by Stereolithography. (4,575,330), U.S. Patent."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1221","DOI":"10.1617\/s11527-012-9828-z","article-title":"Mix design and fresh properties for high-performance printing concrete","volume":"45","author":"Le","year":"2012","journal-title":"Mater. Struct."},{"key":"ref_3","first-page":"1","article-title":"Three-dimensional printing in the construction industry: A review","volume":"15","author":"Perkins","year":"2015","journal-title":"Int. J. Constr. Manag."},{"key":"ref_4","unstructured":"Lim, S., Le, T., Webster, J., Buswell, R.A., Austin, S., Gibb, A., and Thorpe, A. (2009, January 13\u201316). Fabricating construction components using layer manufacturing technology. Proceedings of the International Conference on Global Innovation in Construction, Loughborough, UK."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.autcon.2011.06.010","article-title":"Developments in construction-scale additive manufacturing processes","volume":"21","author":"Lim","year":"2012","journal-title":"Autom. Constr."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"102","DOI":"10.1016\/j.matdes.2016.03.097","article-title":"Large-scale 3D printing of ultra-high performance concrete\u2014A new processing route for architects and builders","volume":"100","author":"Gosselin","year":"2016","journal-title":"Mater. Des."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1016\/j.autcon.2016.08.026","article-title":"Additive construction: State-of-the-art, challenges and opportunities","volume":"72","author":"Labonnote","year":"2016","journal-title":"Autom. Constr."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1016\/j.autcon.2016.04.005","article-title":"A critical review of the use of 3-D printing in the construction industry","volume":"68","author":"Wu","year":"2016","journal-title":"Autom. Constr."},{"key":"ref_9","unstructured":"Kidwell, J. (2017). Best Practices and Applications of 3D Printing in the Construction Industry, Construction Management."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1016\/j.jclepro.2017.04.002","article-title":"Potential benefits of digital fabrication for complex structures: Environmental assessment of a robotically fabricated concrete wall","volume":"154","author":"Hack","year":"2017","journal-title":"J. Clean. Prod."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1016\/j.proeng.2014.12.190","article-title":"Toward green concrete for better sustainable environment","volume":"95","author":"Suhendro","year":"2014","journal-title":"Procedia Eng."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2780","DOI":"10.1016\/j.jclepro.2016.10.190","article-title":"Environmental design guidelines for digital fabrication","volume":"142","author":"Habert","year":"2017","journal-title":"J. Clean. Prod."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"613","DOI":"10.1016\/j.conbuildmat.2017.12.051","article-title":"Printable properties of cementitious material containing copper tailings for extrusion based 3D printing","volume":"162","author":"Ma","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1016\/j.conbuildmat.2018.04.115","article-title":"Fresh properties of a novel 3D printing concrete ink","volume":"174","author":"Zhang","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1016\/j.acme.2017.02.008","article-title":"Fresh and hardened properties of 3D printable cementitious materials for building and construction","volume":"18","author":"Paul","year":"2018","journal-title":"Arch. Civ. Mech. Eng."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"586","DOI":"10.1016\/j.conbuildmat.2019.01.235","article-title":"Effects of layer-interface properties on mechanical performance of concrete elements produced by extrusion-based 3D-printing","volume":"205","author":"Nerella","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1016\/j.cemconcomp.2017.02.001","article-title":"Properties of 3D-printed fiber-reinforced Portland cement paste","volume":"79","author":"Hambach","year":"2017","journal-title":"Cem. Concr. Compos."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1016\/j.measurement.2017.08.051","article-title":"Measurement of tensile bond strength of 3D printed geopolymer mortar","volume":"113","author":"Panda","year":"2018","journal-title":"Measurement"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.autcon.2019.03.008","article-title":"Volume-forming 3D concrete printing using a variable-size square nozzle","volume":"104","author":"Xu","year":"2019","journal-title":"Autom. Constr."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"107660","DOI":"10.1016\/j.compositesb.2019.107660","article-title":"3D concrete printer parameter optimisation for high rate digital construction avoiding plastic collapse","volume":"183","author":"Kruger","year":"2020","journal-title":"Compos. Part B Eng."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"558","DOI":"10.1016\/j.cemconres.2011.12.003","article-title":"Hardened properties of high-performance printing concrete","volume":"42","author":"Le","year":"2012","journal-title":"Cem. Concr. Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"468","DOI":"10.1016\/j.conbuildmat.2018.03.232","article-title":"Effect of surface moisture on inter-layer strength of 3D printed concrete","volume":"172","author":"Sanjayan","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1016\/j.matlet.2017.07.123","article-title":"Anisotropic mechanical performance of 3D printed fiber reinforced sustainable construction material","volume":"209","author":"Panda","year":"2017","journal-title":"Mater. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Perrot, A., Jacquet, Y., Rangeard, D., Courteille, E., and Sonebi, M. (2020). Nailing of layers: A promising way to reinforce concrete 3D printing structures. Materials, 13.","DOI":"10.3390\/ma13071518"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"102992","DOI":"10.1016\/j.autcon.2019.102992","article-title":"Mesh reinforcing method for 3D Concrete Printing","volume":"109","author":"Marchment","year":"2020","journal-title":"Autom. Constr."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1595\/205651315X688406","article-title":"Additive manufacturing technologies: 3D printing, rapid prototyping, and direct digital manufacturing, second edition","volume":"59","author":"Gibson","year":"2015","journal-title":"Johns. Matthey Tech. Rev."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.cemconres.2019.02.017","article-title":"Hardened properties of 3D printed concrete: The influence of process parameters on interlayer adhesion","volume":"119","author":"Wolfs","year":"2019","journal-title":"Cem. Concr. Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.autcon.2017.06.013","article-title":"Interlayer adhesion and strength of structures in Contour Crafting\u2014Effects of aggregate size, extrusion rate, and layer thickness","volume":"81","author":"Zareiyan","year":"2017","journal-title":"Autom. Constr."},{"key":"ref_29","first-page":"301","article-title":"Mega-scale fabrication by Contour Crafting","volume":"1","author":"Khoshnevis","year":"2006","journal-title":"Int. J. Ind. Syst. Eng."},{"key":"ref_30","unstructured":"Nikita Chen-iun-tai (2020, March 15). Apis-Cor. Available online: www.apis-cor.com."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Lim, S., Buswell, R., Le, T., Wackrow, R., Austin, S., Gibb, A., and Thorpe, T. (July, January 29). Development of a viable concrete printing process. Proceedings of the 28th International Symposium on Automation and Robotics in Construction (ISARC 2011), Seoul, Korea.","DOI":"10.22260\/ISARC2011\/0124"},{"key":"ref_32","unstructured":"Enrico Dini (2020, April 13). D-Shape. Available online: https:\/\/www.d-shape.com."},{"key":"ref_33","unstructured":"ASTM (2014). Standard Specification for Flow Table for Use in Tests of Hydraulic Cement, ASTM International. ASTM C 230\/C230M."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"858","DOI":"10.1016\/j.cemconres.2005.09.005","article-title":"Green and early age compressive strength of extruded cement mortar monitored with compression tests and ultrasonic techniques","volume":"36","author":"Voigt","year":"2006","journal-title":"Cem. Concr. Res."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"563","DOI":"10.1016\/j.compositesb.2019.02.040","article-title":"Mechanical properties and deformation behaviour of early age concrete in the context of digital construction","volume":"165","author":"Panda","year":"2019","journal-title":"Compos. Part B Eng."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"106016","DOI":"10.1016\/j.cemconres.2020.106016","article-title":"Elastic buckling and plastic collapse during 3D concrete printing","volume":"135","author":"Suiker","year":"2020","journal-title":"Cem. Concr. Res."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.cemconres.2018.04.005","article-title":"Rheological requirements for printable concretes","volume":"112","author":"Roussel","year":"2018","journal-title":"Cem. Concr. Res."},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Panda, B., Mohamed, N.A.N., Paul, S.C., Singh, G.B., Tan, M.J., and \u0160avija, B. (2019). The effect of material fresh properties and process parameters on Buildability and interlayer adhesion of 3D printed concrete. Materials, 12.","DOI":"10.3390\/ma12132149"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"104","DOI":"10.1080\/17452759.2018.1500420","article-title":"Time gap effect on bond strength of 3D-printed concrete","volume":"14","author":"Tay","year":"2018","journal-title":"Virtual Phys. Prototyp."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1016\/j.cemconres.2018.02.001","article-title":"Early age mechanical behaviour of 3D printed concrete: Numerical modelling and experimental testing","volume":"106","author":"Wolfs","year":"2018","journal-title":"Cem. Concr. Res."},{"key":"ref_41","unstructured":"ASTM (2008). Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens), ASTM International. ASTM C 109\/C109M-07."},{"key":"ref_42","unstructured":"ASTM (2019). Standard Test Method for Flexural Strength of Hydraulic Cement Mortars, ASTM International. ASTM C348-18."},{"key":"ref_43","unstructured":"ASTM (2004). Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens, ASTM International. ASTM C 496\/C 496M-04."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/13\/21\/4919\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T10:28:07Z","timestamp":1760178487000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/13\/21\/4919"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,11,2]]},"references-count":43,"journal-issue":{"issue":"21","published-online":{"date-parts":[[2020,11]]}},"alternative-id":["ma13214919"],"URL":"https:\/\/doi.org\/10.3390\/ma13214919","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,11,2]]}}}