{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,6]],"date-time":"2026-05-06T11:27:24Z","timestamp":1778066844352,"version":"3.51.4"},"reference-count":61,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2021,6,25]],"date-time":"2021-06-25T00:00:00Z","timestamp":1624579200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012099","name":"Indian Institute of Technology Guwahati","doi-asserted-by":"publisher","award":["xxMESUGIITG01315xBNP001.xls"],"award-info":[{"award-number":["xxMESUGIITG01315xBNP001.xls"]}],"id":[{"id":"10.13039\/501100012099","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sustainability"],"abstract":"<jats:p>Interlayer bond strength is one of the key aspects of 3D concrete printing. It is a well-established fact that, similar to other 3D printing process material designs, process parameters and printing environment can significantly affect the bond strength between layers of 3D printed concrete. The first section of this review paper highlights the importance of bond strength, which can affect the mechanical and durability properties of 3D printed structures. The next section summarizes all the testing and bond strength measurement methods adopted in the literature, including mechanical and microstructure characterization. Finally, the last two sections focus on the influence of critical parameters on bond strength and different strategies employed in the literature for improving the strength via strengthening mechanical interlocking in the layers and tailoring surface as well as interface reactions. This concise review work will provide a holistic perspective on the current state of the art of interlayer bond strength in 3D concrete printing process.<\/jats:p>","DOI":"10.3390\/su13137137","type":"journal-article","created":{"date-parts":[[2021,6,25]],"date-time":"2021-06-25T04:46:57Z","timestamp":1624596417000},"page":"7137","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":86,"title":["A Concise Review on Interlayer Bond Strength in 3D Concrete Printing"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6232-6642","authenticated-orcid":false,"given":"Adewumi John","family":"Babafemi","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Stellenbosch University, Stellenbosch 7602, South Africa"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7665-1710","authenticated-orcid":false,"given":"John Temitope","family":"Kolawole","sequence":"additional","affiliation":[{"name":"School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough LE11 3TU, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3021-8591","authenticated-orcid":false,"given":"Md Jihad","family":"Miah","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, University of Asia Pacific, Dhaka 1205, Bangladesh"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9997-2077","authenticated-orcid":false,"given":"Suvash Chandra","family":"Paul","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3563-7744","authenticated-orcid":false,"given":"Biranchi","family":"Panda","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Du Plessis, A., Babafemi, A.J., Paul, S.C., Panda, B., Tran, J.P., and Broeckhoven, C. (2021). Biomimicry for 3D concrete printing: A review and perspective. Addit. Manuf., 1823.","DOI":"10.1016\/j.addma.2020.101823"},{"key":"ref_2","unstructured":"(2020, October 30). Europe\u2019s Largest 3D-Printer Prints an Entire Two-Story House. Available online: https:\/\/www.designboom.com\/architecture\/kamp-c-3d-prints-two-story-house-08-17-2020\/."},{"key":"ref_3","unstructured":"(2020, October 30). The World\u2019s Largest 3D Printed Concrete Bridge Is Completed in Shanghai. Available online: https:\/\/www.designboom.com\/architecture\/shanghai-3d-printed-concrete-bridge-jcda-01-21-19\/."},{"key":"ref_4","unstructured":"(2021, February 17). A Five-Storey Apartment in China. Available online: http:\/\/www.winsun3d.com."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.cemconres.2018.05.006","article-title":"3D printing using concrete extrusion: A roadmap for research","volume":"112","author":"Buswell","year":"2018","journal-title":"Cem. Concr. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.cemconcomp.2018.03.017","article-title":"A self-reinforced cementitious composite for building-scale 3D printing","volume":"90","author":"Soltan","year":"2018","journal-title":"Cem. Concr. Comp."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"155","DOI":"10.4028\/www.scientific.net\/MSF.939.155","article-title":"Effect of type of fiber on inter-layer bond and flexural strengths of extrusion-based 3D printed geopolymer","volume":"939","author":"Nematollahi","year":"2018","journal-title":"Mater. Sci. Forum"},{"key":"ref_8","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":"2019","journal-title":"Virtual Phys. Prototyp."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Alchaar, A.S., and Al-Tamimi, A.K. (2021). Mechanical properties of 3D printed concrete in hot temperatures. Constr. Build. Mater., 266.","DOI":"10.1016\/j.conbuildmat.2020.120991"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1617\/s11527-021-01632-x","article-title":"Hardened properties and durability of large-scale 3D printed cement-based materials","volume":"54","author":"Zhang","year":"2021","journal-title":"Mater. Struct."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Moelich, G.M., Kruger, J., and Combrinck, R. (2020). Plastic shrinkage cracking in 3D printed concrete. Compos. Part B Eng., 200.","DOI":"10.1016\/j.compositesb.2020.108313"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Van Der Putten, J., Snoeck, D., De Coensel, R., De Schutter, G., and Van Tittelboom, K. (2021). Early age shrinkage phenomena of 3D printed cementitious materials with superabsorbent polymers. J. Build. Eng., 35.","DOI":"10.1016\/j.jobe.2020.102059"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"624","DOI":"10.1016\/j.cemconres.2007.09.023","article-title":"Distinct-layer casting of SCC: The mechanical consequences of thixotropy","volume":"38","author":"Roussel","year":"2008","journal-title":"Cem. Concr. Res."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Cicione, A., Kruger, J., Walls, R.S., and Van Zijl, G. (2020). An experimental study of the behavior of 3D printed concrete at elevated temperatures. Fire Saf. J.","DOI":"10.1016\/j.firesaf.2020.103075"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Pham, L., Tran, P., and Sanjayan, J. (2020). Steel fibres reinforced 3D printed concrete: Influence of fibre sizes on mechanical performance. Constr. Build. Mater., 250.","DOI":"10.1016\/j.conbuildmat.2020.118785"},{"key":"ref_16","unstructured":"Radoji\u010di\u0107, V., Radulovi\u0107, R., Tari\u0107, M., and Jovi\u0107, S. (2020). The influence of the steel fibers on improvement of mechanical characteristic of concrete. Mech. Based Des. Struct. Mach., 1\u201311."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"278","DOI":"10.1016\/j.conbuildmat.2018.12.061","article-title":"Rheological and harden properties of the high-thixotropy 3D printing concrete","volume":"201","author":"Zhang","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Jeong, H., Han, S.J., Choi, S.H., Lee, Y.J., Yi, S.T., and Kim, K.S. (2019). Rheological property criteria for buildable 3D printing concrete. Materials, 12.","DOI":"10.3390\/ma12040657"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Chua, C.K., and Leong, K.F. (2014). 3D Printing and Additive Manufacturing: Principles and Applications (with Companion Media Pack) of Rapid Prototyping, World Scientific Publishing Company. [4th ed.].","DOI":"10.1142\/9008"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Weng, Y., Li, M., Zhang, D., Tan, M.J., and Qian, S. (2021). Investigation of interlayer adhesion of 3D printable cementitious material from the aspect of printing process. Cem. Concr. Res., 143.","DOI":"10.1016\/j.cemconres.2021.106386"},{"key":"ref_21","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_22","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_23","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_24","doi-asserted-by":"crossref","unstructured":"Marchment, T., Sanjayan, J.G., Nematollahi, B., and Xia, M. (2019). Interlayer strength of 3D printed concrete: Influencing factors and method of enhancing. 3D Concrete Printing Technology, Butterworth-Heinemann.","DOI":"10.1016\/B978-0-12-815481-6.00012-9"},{"key":"ref_25","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-Effects of aggregate size, extrusion rate, and layer thickness","volume":"81","author":"Zareiyan","year":"2017","journal-title":"Autom. Constr."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Kloft, H., Krauss, H.W., Hack, N., Herrmann, E., Neudecker, S., Varady, P.A., and Lowke, D. (2020). Influence of process parameters on the interlayer bond strength of concrete elements additive manufactured by Shotcrete 3D Printing (SC3DP). Cem. Concr. Res., 134.","DOI":"10.1016\/j.cemconres.2020.106078"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1680\/macr.2007.00108","article-title":"Bond strength development between concretes of different ages","volume":"60","author":"Beushausen","year":"2008","journal-title":"Mag. Concr. Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1016\/j.autcon.2017.08.019","article-title":"Effects of interlocking on interlayer adhesion and strength of structures in 3D printing of concrete","volume":"83","author":"Zareiyan","year":"2017","journal-title":"Autom. Constr."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"748","DOI":"10.1016\/j.cemconres.2004.05.027","article-title":"Comparison of methods for evaluating bond strength between concrete substrate and repair materials","volume":"35","author":"Momayez","year":"2005","journal-title":"Cem. Concr. Res."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Ma, G., Salman, N.M., Wang, L., and Wang, F. (2020). A novel additive mortar leveraging internal curing for enhancing interlayer bonding of cementitious composite for 3D printing. Constr. Build. Mater., 244.","DOI":"10.1016\/j.conbuildmat.2020.118305"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"He, L., Chow, W.T., and Li, H. (2020). Effects of interlayer notch and shear stress on interlayer strength of 3D printed cement paste. Addit. Manuf., 36.","DOI":"10.1016\/j.addma.2020.101390"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Chen, Y., Jansen, K., Zhang, H., Rodriguez, C.R., Gan, Y., \u00c7opuro\u011flu, O., and Schlangen, E. (2020). Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study. Constr. Build. Mater., 262.","DOI":"10.1016\/j.conbuildmat.2020.120094"},{"key":"ref_33","unstructured":"ASTM D7234 (2019). Standard Test Method for Pull-off Adhesion Strength of Coatings on Concrete Using Portable Pull-off Adhesion Testers, ASTM International."},{"key":"ref_34","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_35","unstructured":"NEN-EN 12390-6 (2009). Testing Hardened Concrete\u2014Part 6: Tensile Splitting Strength of Test Specimens, The Royal Netherlands Standardization Institute."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Marchment, T., Sanjayan, J., and Xia, M. (2019). Method of enhancing interlayer bond strength in construction scale 3D printing with mortar by effective bond area amplification. Mater. Des., 169.","DOI":"10.1016\/j.matdes.2019.107684"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"712","DOI":"10.1016\/j.conbuildmat.2019.07.161","article-title":"Correlation between pore characteristics and tensile bond strength of additive manufactured mortar using X-ray computed tomography","volume":"226","author":"Lee","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_38","unstructured":"BS EN 14488-4 (2005). Testing Sprayed Concrete. Bond Strength of Cores by Direct Tension, British Standard Institution."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Geng, Z., She, W., Zuo, W., Lyu, K., Pan, H., Zhang, Y., and Miao, C. (2020). Layer-interface properties in 3D printed concrete: Dual hierarchical structure and micromechanical characterization. Cem. Concr. Res., 138.","DOI":"10.1016\/j.cemconres.2020.106220"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Panda, B., Mohamed, N.A.N., Paul, S.C., Bhagath Singh, G.V.P., 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_41","doi-asserted-by":"crossref","unstructured":"Lee, H., Kim, J.H.J., Moon, J.H., Kim, W.W., and Seo, E.A. (2019). Evaluation of the mechanical properties of a 3D-printed mortar. Materials, 12.","DOI":"10.3390\/ma12244104"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Buswell, R.A., da Silva, W.L., Bos, F.P., Schipper, H.R., Lowke, D., Hack, N., and Roussel, N. (2020). A process classification framework for defining and describing Digital Fabrication with Concrete. Cem. Concr. Res., 134.","DOI":"10.1016\/j.cemconres.2020.106068"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.cemconcomp.2019.03.008","article-title":"A novel method to enhance the interlayer bonding of 3D printing concrete: An experimental and computational investigation","volume":"99","author":"Hosseini","year":"2019","journal-title":"Cem. Concr. Comp."},{"key":"ref_44","unstructured":"NEN-EN 196-1 (2016). Methods of Testing Cement\u2014Part 1: Determination of Strength, The Royal Netherlands Standardization Institute."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Dressler, I., Freund, N., and Lowke, D. (2020). The effect of accelerator dosage on fresh concrete properties and on interlayer strength in shotcrete 3D printing. Materials, 13.","DOI":"10.3390\/ma13020374"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Wang, L., Tian, Z., Ma, G., and Zhang, M. (2020). Interlayer bonding improvement of 3D printed concrete with polymer modified mortar: Experiments and molecular dynamics studies. Cem. Concr. Comp., 110.","DOI":"10.1016\/j.cemconcomp.2020.103571"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Van Der Putten, J., Deprez, M., Cnudde, V., De Schutter, G., and Van Tittelboom, K. (2019). Microstructural characterization of 3D printed cementitious materials. Materials, 12.","DOI":"10.3390\/ma12182993"},{"key":"ref_48","unstructured":"DIN EN ISO 4287 (2010). Geometrical Product Specifications (GPS)\u2014Surface Texture: Profile Method\u2014Terms, Definitions and Surface Texture Parameters, Deutsches Institut f\u00fcr Normung."},{"key":"ref_49","unstructured":"Marchment, T., Xia, M., Dodd, E., Sanjayan, J., and Nematollahi, B. (July, January 28). Effect of delay time on the mechanical properties of extrusion-based 3D printed concrete. Proceedings of the International Symposium on Automation and Robotics in Construction, Taipei, Taiwan."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Keita, E., Bessaies-Bey, H., Zuo, W., Belin, P., and Roussel, N. (2019). Weak bond strength between successive layers in extrusion-based additive manufacturing: Measurement and physical origin. Cem. Concr. Res., 123.","DOI":"10.1016\/j.cemconres.2019.105787"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Ding, T., Xiao, J., Zou, S., and Wang, Y. (2020). Hardened properties of layered 3D printed concrete with recycled sand. Cem. Concr. Comp., 113.","DOI":"10.1016\/j.cemconcomp.2020.103724"},{"key":"ref_52","first-page":"234","article-title":"The effect of print parameters on the (micro) structure of 3D printed cementitious materials","volume":"Volume 19","year":"2018","journal-title":"RILEM International Conference on Concrete and Digital Fabrication"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"784","DOI":"10.1108\/RPJ-09-2016-0154","article-title":"A review of 3D concrete printing systems and materials properties: Current status and future research prospects","volume":"24","author":"Paul","year":"2018","journal-title":"Rapid Prototyp. J."},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"Wang, L., Liu, Y., Yang, Y., Li, Y., and Bai, M. (2021). Bonding performance of 3D printing concrete with self-locking interfaces exposed to compression\u2013shear and compression\u2013splitting stresses. Addit. Manuf., 42.","DOI":"10.1016\/j.addma.2021.101992"},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Muthukrishnan, S., Ramakrishnan, S., and Sanjayan, J. (2020). Effect of microwave heating on interlayer bonding and buildability of geopolymer 3D concrete printing. Constr. Build. Mater., 265.","DOI":"10.1016\/j.conbuildmat.2020.120786"},{"key":"ref_56","doi-asserted-by":"crossref","unstructured":"Weng, Y., Li, M., Wong, T.N., and Tan, M.J. (2021). Synchronized concrete and bonding agent deposition system for interlayer bond strength enhancement in 3D concrete printing. Autom. Constr., 123.","DOI":"10.1016\/j.autcon.2020.103546"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"2591","DOI":"10.1007\/s00253-016-7316-z","article-title":"Bioconcrete: Next generation of self-healing concrete","volume":"100","author":"Seifan","year":"2016","journal-title":"Appl. Microbiol. Biotechnol."},{"key":"ref_58","first-page":"1","article-title":"Active control of properties of concrete: A (p) review","volume":"51","author":"Lesage","year":"2018","journal-title":"Mater. Struct."},{"key":"ref_59","doi-asserted-by":"crossref","unstructured":"Moini, M., Olek, J., Youngblood, J.P., Magee, B., and Zavattieri, P.D. (2018). Additive Manufacturing and Performance of Architectured Cement-Based Materials. Adv. Mater., 30.","DOI":"10.1002\/adma.201802123"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"340","DOI":"10.1080\/17452759.2020.1771741","article-title":"Deep learning for fabrication and maturation of 3D bioprinted tissues and organs","volume":"15","author":"Ng","year":"2020","journal-title":"Virtual Phys. Prototyp."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.measurement.2016.03.006","article-title":"Empirical investigation of environmental characteristic of 3-D additive manufacturing process based on slice thickness and part orientation","volume":"86","author":"Panda","year":"2016","journal-title":"Measurement"}],"container-title":["Sustainability"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2071-1050\/13\/13\/7137\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:23:49Z","timestamp":1760163829000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2071-1050\/13\/13\/7137"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6,25]]},"references-count":61,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2021,7]]}},"alternative-id":["su13137137"],"URL":"https:\/\/doi.org\/10.3390\/su13137137","relation":{},"ISSN":["2071-1050"],"issn-type":[{"value":"2071-1050","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,6,25]]}}}