{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T01:46:05Z","timestamp":1773193565324,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T00:00:00Z","timestamp":1772841600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>3D printing (3DP) of cement-based systems (CBSs) is a highly demanded technology in the construction field. Material requirements include specific rheological conditions for proper extrusion, followed by fast stiffening and strength gain to allow the construction process to continue, taking into account variable environmental conditions if the construction is on-site. To guarantee quality control of the process, it is essential to define field-oriented testing methodologies that allow real-time monitoring of mechanical properties\u2019 evolution of the printed material, which will govern construction speed. This study evaluates the cone penetration test (CPT) method as a field-oriented test method to estimate the mechanical properties of 3DP CBSs over time. CPT penetration depth measurements were used to calculate shear yield stress and fresh compressive strength over time for 90 min. The experimental results were compared to two widely used laboratory tests: the fresh compressive strength test (squeeze test\u2014SQT) and DSR test (vane test\u2014VT). CBS pastes with and without fly ash and with three inorganic modifiers (nanoclays) and two types of organic rheology-modifying admixtures were considered. The results showed that CPT is highly conditioned by the stiffness of the paste, measured by the compressive Young Modulus (E), overestimating CBSs\u2019 strength. The increase in E over time showed an inflection point at 130 kPa, corresponding to the evolution from plastic to pseudo-rigid behavior in the pastes. The corresponding time was used to define a linear adjustment for the average strength calculated using the CPT regarding both the fresh compressive SQT and shear yield stress VT.<\/jats:p>","DOI":"10.3390\/ma19051029","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T08:58:45Z","timestamp":1773046725000},"page":"1029","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluation of Cone-Penetration Test as a Rheology Quality-Control Field-Oriented Test for 3D Printing Cement-Based Systems"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-8912-8142","authenticated-orcid":false,"given":"Enrique","family":"Gomez","sequence":"first","affiliation":[{"name":"Departamento de Arquitectura, Universidad de Alcala, 28801 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8094-6071","authenticated-orcid":false,"given":"Hugo","family":"Varela","sequence":"additional","affiliation":[{"name":"Departamento de Arquitectura, Universidad de Alcala, 28801 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2996-3412","authenticated-orcid":false,"given":"Gonzalo","family":"Barluenga","sequence":"additional","affiliation":[{"name":"Departamento de Arquitectura, Universidad de Alcala, 28801 Madrid, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106839","DOI":"10.1016\/j.cemconres.2022.106839","article-title":"CCR digital concrete 2022 SI: Editorial","volume":"159","author":"Buswell","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"106837","DOI":"10.1016\/j.cemconres.2022.106837","article-title":"On sustainability and digital fabrication with concrete","volume":"158","author":"Flatt","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"67","DOI":"10.21809\/rilemtechlett.2016.16","article-title":"Digital Concrete: Opportunities and Challenges","volume":"1","author":"Wangler","year":"2016","journal-title":"RILEM Tech. Lett."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Perrot, A. (2019). 3D Printing of Concrete: State of the Art and Challenges of the Digital Construction Revolution, Wiley.","DOI":"10.1002\/9781119610755"},{"key":"ref_5","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_6","doi-asserted-by":"crossref","first-page":"105217","DOI":"10.1016\/j.cemconcomp.2023.105217","article-title":"Extrusion and structural build-up of 3D printing cement pastes with fly ash, nanoclays and VMAs","volume":"142","author":"Varela","year":"2023","journal-title":"Cem. Concr. Comp."},{"key":"ref_7","first-page":"283","article-title":"Rheology of extruded cement-based materials","volume":"104","author":"Kuder","year":"2007","journal-title":"ACI Mater. J."},{"key":"ref_8","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_9","doi-asserted-by":"crossref","first-page":"103344","DOI":"10.1016\/j.cemconcomp.2019.103344","article-title":"Triaxial compression testing on early age concrete for numerical analysis of 3D concrete printing","volume":"104","author":"Wolfs","year":"2019","journal-title":"Cem. Concr. Comp."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1213","DOI":"10.1617\/s11527-015-0571-0","article-title":"Structural built-up of cement-based materials used for 3D-printing extrusion techniques","volume":"49","author":"Perrot","year":"2016","journal-title":"Mater. Struct."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"105798","DOI":"10.1016\/j.cemconres.2019.105798","article-title":"Recent advances on yield stress and elasticity of fresh cement-based materials","volume":"124","author":"Roussel","year":"2019","journal-title":"Cem. Concr. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"106646","DOI":"10.1016\/j.cemconres.2021.106646","article-title":"Viscosity modifying agents: Key components of advanced cement-based materials with adapted rheology","volume":"152","author":"Khayat","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.cemconres.2018.05.014","article-title":"Hydration and rheology control of concrete for digital fabrication: Potential admixtures and cement chemistry","volume":"112","author":"Marchon","year":"2018","journal-title":"Cem. Concr. Res."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Palacios, M., and Flatt, R.J. (2016). Working mechanism of viscosity-modifying admixtures. Science and Technology of Concrete Admixtures, Elsevier Ltd.","DOI":"10.1016\/B978-0-08-100693-1.00020-5"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"139358","DOI":"10.1016\/j.conbuildmat.2024.139358","article-title":"Rheology and early age evaluation of 3D printable cement-limestone filler pastes with nanoclays and methylcellulose","volume":"457","author":"Marquez","year":"2024","journal-title":"Constr. Build. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"106553","DOI":"10.1016\/j.cemconres.2021.106553","article-title":"3D printing of calcined clay-limestone-based cementitious materials","volume":"149","author":"Chen","year":"2021","journal-title":"Cem. Concr. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"106502","DOI":"10.1016\/j.cemconres.2021.106502","article-title":"A review of the effect of nanoclays on the fresh and hardened properties of cement-based materials","volume":"147","author":"Kawashima","year":"2021","journal-title":"Cem. Concr. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"372","DOI":"10.1016\/j.conbuildmat.2013.10.059","article-title":"Clay in cement-based materials: Critical overview of state-of-the-art","volume":"51","author":"Nehdi","year":"2014","journal-title":"Constr. Build. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"118285","DOI":"10.1016\/j.conbuildmat.2020.118285","article-title":"Influence of nanoclays on flowability and rheology of SCC pastes","volume":"243","author":"Varela","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"104301","DOI":"10.1016\/j.cemconcomp.2021.104301","article-title":"Rheology of fresh cement pastes modified with nanoclay-coated cements","volume":"125","author":"Douba","year":"2022","journal-title":"Cem. Concr. Comp."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"100232","DOI":"10.1016\/j.dibe.2023.100232","article-title":"Recommendations for quality control in industrial 3D concrete printing construction with mono-component concrete: A critical evaluation of ten test methods and the introduction of the performance index","volume":"16","author":"Rehman","year":"2023","journal-title":"Dev. Built Environ."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"106836","DOI":"10.1016\/j.cemconres.2022.106836","article-title":"Assesing the fresh properties of printable cemento-based materials: High potencial test for quality control","volume":"158","author":"Nicolas","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1617\/s11527-025-02831-6","article-title":"Pocket vane and penetrometer as quality control tool for Extrusion 3D concrete printing","volume":"58","author":"Barry","year":"2025","journal-title":"Mater. Struct."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"107646","DOI":"10.1016\/j.cemconres.2024.107646","article-title":"On-line and in-line quality assessment across all scale levels of 3D concrete printing","volume":"185","author":"Wolfs","year":"2024","journal-title":"Cem. Concr. Res."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Kuder, K.G., and Shah, S.P. (2006). Capillary rheology of extruded cement-based mat\u00e9rials. Measuring, Monitoring and Modeling Concrete Properties, Springer.","DOI":"10.1007\/978-1-4020-5104-3_58"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1007\/s00397-005-0074-y","article-title":"Ram extrusion force for a frictional plastic material: Model prediction and application to cement paste","volume":"45","author":"Perrot","year":"2006","journal-title":"Rheol. Acta"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"104074","DOI":"10.1016\/j.cemconcomp.2021.104074","article-title":"The \u201cSlugs-test\u201d for extrusion-based additive manufacturing: Protocol, analysis and practical limits","volume":"121","author":"Ducoulombier","year":"2021","journal-title":"Cem. Concr. Comp."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"106764","DOI":"10.1016\/j.cemconres.2022.106764","article-title":"Comparison between methods for indirect assessment of buildability in fresh 3D printed mortar and concrete","volume":"156","author":"Ivanova","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"106802","DOI":"10.1016\/j.cemconres.2022.106802","article-title":"Slow penetration for characterizing concrete for digital fabrication","volume":"157","author":"Reiter","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"106956","DOI":"10.1016\/j.cemconres.2022.106956","article-title":"Evaluation of the unconfined uniaxial compression test to study the evolution of apparent printable mortar properties during the early age transition regime","volume":"161","author":"Pott","year":"2022","journal-title":"Cem. Concr. Res."},{"key":"ref_31","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_32","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.1016\/j.matpr.2022.01.108","article-title":"Influence of nanoclay on the fresh and rheological behaviour of 3D printing mortar","volume":"58","author":"Kaushik","year":"2022","journal-title":"Mater. Today Proc."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1122\/1.1879041","article-title":"\u201cFifty-cent rheometer\u201d for yield stress measurements: From slump to spreading flow","volume":"49","author":"Roussel","year":"2005","journal-title":"J. Rheol."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Varela, H., Barluenga, G., and Sonebi, M. (2023). Rheology characterization of 3D printing mortars with nanoclays and basalt fibers. Mater. Today Proc., in press.","DOI":"10.1016\/j.matpr.2023.07.151"},{"key":"ref_35","first-page":"97","article-title":"Effect of Red Mud, Nanoclay, and Natural Fiber on Fresh and Rheological Properties of Three-Dimensional Concrete Printing","volume":"118","author":"Sonebi","year":"2021","journal-title":"ACI Mater. J."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"133602","DOI":"10.1016\/j.conbuildmat.2023.133602","article-title":"Affordable inline structuration measurements of printable mortar with a pocket shear vane","volume":"408","author":"Demont","year":"2023","journal-title":"Constr. Build. Mater."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"458","DOI":"10.1016\/j.conbuildmat.2019.04.134","article-title":"Underwater 3D printing of cement-based mortar","volume":"214","author":"Mazhoud","year":"2019","journal-title":"Constr. Build. Mater."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1561","DOI":"10.1617\/s11527-012-9997-9","article-title":"Structural bould-up of rigid fiber reinforced cement-based materials","volume":"46","author":"Perrot","year":"2013","journal-title":"Mater. Struct."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"701","DOI":"10.1680\/geot.2001.51.8.701","article-title":"Theory and practice of the fall cone test","volume":"51","author":"Koumoto","year":"2001","journal-title":"G\u00e9otechnique"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1016\/j.cemconres.2009.01.012","article-title":"Yield stress during setting of cement pastes from penetration tests","volume":"39","author":"Lootens","year":"2009","journal-title":"Cem. Concr. Res."},{"key":"ref_41","unstructured":"Van Baars, S. (2016). 100 Year Prandtls Wedge Intermediate Report, University of Luxembourg."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"134968","DOI":"10.1016\/j.conbuildmat.2024.134968","article-title":"From pumping to deposition: A Comprehensive review of test methods for characterizing concrete printability","volume":"414","author":"Fasihi","year":"2024","journal-title":"Constr. Build. Mater."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/19\/5\/1029\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,10]],"date-time":"2026-03-10T05:21:51Z","timestamp":1773120111000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/19\/5\/1029"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3,7]]},"references-count":42,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2026,3]]}},"alternative-id":["ma19051029"],"URL":"https:\/\/doi.org\/10.3390\/ma19051029","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,3,7]]}}}