{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T10:03:16Z","timestamp":1789552996291,"version":"build-2803163510"},"reference-count":57,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T00:00:00Z","timestamp":1789516800000},"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>The design of cellular architectures based on topology offers a promising strategy for tailoring the mechanical performance of cementitious composites without altering the matrix composition. However, the influence of the topological transition from re-entrant auxetic structures to conventional honeycomb structures on the compressive response of mortar is not yet fully understood. In this study, a family of polylactic acid (PLA) cellular architectures was systematically designed using fused deposition modeling (FDM), varying the strut angle from \u221270\u2218 to +70\u2218 and thereby generating a transition from auxetic to honeycomb topologies, with the cubic configuration serving as the intermediate topology. Quasi-static compression tests were conducted on standalone lattices, lattice-reinforced mortar composites, and unreinforced mortar specimens. The response was characterized in terms of apparent compressive modulus, apparent yield stress, energy absorption density, and specific energy absorption. Embedding the PLA lattices in mortar changed the macroscopic post-yield response, with the reinforced specimens sustaining deformation over a larger strain interval than the corresponding isolated lattices. This behavior is consistent with a constraint effect imposed by the surrounding matrix; however, the post-test PLA\u2013mortar interface condition, possible debonding or delamination, and internal crack distribution were not directly characterized. Accordingly, the compressive response of these structured composites is governed by the combined effects of cellular topology and matrix\u2013lattice interaction, while the specific microscale mechanisms underlying this interaction require direct experimental validation. These findings establish topological transition as a design strategy for developing cementitious composites with tailored quasi-static mechanical performance.<\/jats:p>","DOI":"10.3390\/ma19183932","type":"journal-article","created":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T09:06:37Z","timestamp":1789549597000},"page":"3932","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Topology-Driven Compression and Energy Absorption of PLA-Lattice-Reinforced Mortar"],"prefix":"10.3390","volume":"19","author":[{"given":"Miguel","family":"Loyola","sequence":"first","affiliation":[{"name":"Construction Multidisciplinary Research Group, Facultad de Arquitectura, Construcci\u00f3n y Medio Ambiente, Universidad Aut\u00f3noma de Chile, Talca 3460000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"software","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0009-1665","authenticated-orcid":false,"given":"C\u00e9sar","family":"Garrido","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Universidad del B\u00edo-B\u00edo, Concepci\u00f3n 4081112, Chile"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"given":"Marian","family":"Valenzuela","sequence":"additional","affiliation":[{"name":"Doctoral Program in Sciences of Natural Resources, Universidad de La Frontera, Casilla 54-D, Temuco 4780000, Chile"},{"name":"Sustainable Building Design Lab, Department UEE, Faculty of Applied Sciences, University of Li\u00e8ge, 4000 Liege, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2808-0415","authenticated-orcid":false,"given":"V\u00edctor","family":"Tuninetti","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, Chile"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5995-5926","authenticated-orcid":false,"given":"Rodrigo","family":"Valle","sequence":"additional","affiliation":[{"name":"Construction Multidisciplinary Research Group, Facultad de Arquitectura, Construcci\u00f3n y Medio Ambiente, Universidad Aut\u00f3noma de Chile, Talca 3460000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"128957","DOI":"10.1016\/j.conbuildmat.2022.128957","article-title":"A critical review on the utilization of coir (coconut fiber) in cementitious materials","volume":"351","author":"Ali","year":"2022","journal-title":"Constr. 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