2026-04-19T14:06:44Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/111562025-12-18T01:05:30Zcom_10259_3969com_10259_5086com_10259_2604col_10259_3970

Pérez Acebo, Heriberto 7750ce11-6069-48ad-8f07-a965c3237488 600 Linares Unamunzaga, Alaitz 316 600 0000-0002-4855-4403 Aragón Torre, Ángel 31 600 0000-0001-6212-5456 Gonzalo Orden, Hernán 262 600 0000-0003-1777-2333 2025-12-17T10:01:33Z 2025-12-17T10:01:33Z 2025-11 https://hdl.handle.net/10259/11156 10.3390/buildings15234304 2075-5309 The compressive strength is the primary parameter used for the design, control, and performance assessment of cementitious materials. However, this value is strongly influenced by specimen geometry, which has led to the introduction of shape coefficients to convert compressive strength results between different specimen types, particularly between cubes and cylinders. While this topic has been extensively investigated in concrete, very limited research has addressed the shape coefficient in soil-cement or cement-treated base materials, despite their widespread use in pavement construction. Aiming to bridge this gap, this study systematically analyzes the unconfined compressive strength (UCS) of soil-cement specimens with different geometries. Two soil-cement mixtures with distinct physical and chemical characteristics were tested at various curing ages (7, 28, and 90 days) using cylindrical specimens (150 mm diameter × 180 mm height) and cubic specimens (150 mm edge). The results show that the UCS in cylindrical specimens (UCScyl) was consistently higher than that of cubic specimens (UCScub), although the difference decreased with increasing compressive strength. By combining all datasets, a single conversion factor of 1.04 was derived, resulting in an equation, UCScyl = 1.04·UCScub, with an excellent determination coefficient (R2 = 0.99), enabling reliable conversion between cubic and cylindrical UCS results for soil-cement. This research was funded by the Education Council of the Castille and Leon Government of Spain, under grant numbers BU009A06 and UB 07/03, and by the Provincial Council of Biscay (Bizkaiko Foru Aldundia/Diputación Foral de Bizkaia), under grant number 5/12/IV/2023/00005, ARASC project, of the grant program aimed at promoting innovation in road infrastructure 2023, and under grant 5/12/IV/2024/00005, ARASC 2 project, of the grant program aimed at promoting innovation in road infrastructure 2024. Additionally, financial support was provided through research contracts with Asfaltos Uribe, S.A., under contract numbers 2024.0037, 2024.0819, W58A06, W40B06, W25C06, and W57B06 application/pdf eng MDPI Buildings. 2025, V. 15, n. 23, p. 4304-4328 https://doi.org/10.3390/buildings15234304 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess K shape coefficient Soil-cement Cement-treated base material Unconfined compressive strength Cylindrical specimen Cubic specimen Ingeniería civil Materiales de construcción Cemento Civil engineering Building materials Cement Shape Coefficient for Soil-Cement: Experimental Determination from Cylindrical and Cubic Specimens info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Buildings 15 23 4304 4328 THUMBNAIL Pérez-buildings_2025.pdf.jpg Pérez-buildings_2025.pdf.jpg IM Thumbnail image/jpeg 4619 https://riubu.ubu.es/bitstream/10259/11156/4/P%c3%a9rez-buildings_2025.pdf.jpg c3f540c05bf9022a0545858b45026749 MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/11156/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 908 https://riubu.ubu.es/bitstream/10259/11156/2/license_rdf 0175ea4a2d4caec4bbcc37e300941108 MD5 2 ORIGINAL Pérez-buildings_2025.pdf Pérez-buildings_2025.pdf application/pdf 4173234 https://riubu.ubu.es/bitstream/10259/11156/1/P%c3%a9rez-buildings_2025.pdf ea974c4eaf7986c1727e701a91bc4e4a MD5 1 10259/11156 oai:riubu.ubu.es:10259/11156 2025-12-18 02:05:30.014 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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