{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T05:42:43Z","timestamp":1767764563678,"version":"3.48.0"},"reference-count":56,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T00:00:00Z","timestamp":1767571200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100018911","name":"Natural Science Foundation of Xiaogan City","doi-asserted-by":"crossref","award":["XGKJ2025010092"],"award-info":[{"award-number":["XGKJ2025010092"]}],"id":[{"id":"10.13039\/100018911","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Research Center of Hubei Small Town Development, Hubei Engineering University","award":["2025K021"],"award-info":[{"award-number":["2025K021"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This study investigates the synergistic effects of hybrid fibers and functionalized multi-walled carbon nanotubes (MWCNTs) on the mechanical and microstructural properties of lithium slag\u2013based geopolymers (FL-EGC). Unlike conventional studies that focus on single reinforcement strategies, this work combines nanoscale modification with macroscale fiber reinforcement to overcome the inherent brittleness of geopolymers. Results show that while hybrid fibers and MWCNTs reduce flowability, the incorporation of 2.5% PVA, 1.0% steel fibers, and 0.15% MWCNTs yielded the best balance of performance, improving ultimate tensile stress by 12.7%, strain by 69.2%, and specific fracture energy by 78.2%. Microstructural analysis confirmed that MWCNTs enhanced crack-bridging and matrix densification, while hybrid fibers improved strength and ductility. These findings demonstrate a novel reinforcement pathway for developing sustainable, high-performance geopolymers from industrial by-products, providing both theoretical insights and practical guidance for green construction materials.<\/jats:p>","DOI":"10.3390\/ma19010213","type":"journal-article","created":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T16:07:07Z","timestamp":1767629227000},"page":"213","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Enhancing Tensile Performance of Lithium Slag Geopolymers Using Hybrid Fibers and Modified Multi-Walled Carbon Nanotubes"],"prefix":"10.3390","volume":"19","author":[{"given":"Qing","family":"Li","sequence":"first","affiliation":[{"name":"School of Civil Engineering, Hubei Engineering University, Xiaogan 432000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chong","family":"Deng","sequence":"additional","affiliation":[{"name":"School of Software Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yali","family":"Hu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingxing","family":"Luo","sequence":"additional","affiliation":[{"name":"School of Civil Engineering, Hubei Engineering University, Xiaogan 432000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0615-580X","authenticated-orcid":false,"given":"Daopei","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Software Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7959-6027","authenticated-orcid":false,"given":"Cai","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Civil Engineering, Hubei Engineering University, Xiaogan 432000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,5]]},"reference":[{"key":"ref_1","first-page":"7","article-title":"Research progress on the lithium extraction process from lepidolite","volume":"28","author":"Qin","year":"2018","journal-title":"Foshan Ceram."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.pecs.2017.10.004","article-title":"State-of-the-art applications of fly ash from coal and biomass: A focus on zeolite synthesis processes and issues","volume":"65","author":"Belviso","year":"2018","journal-title":"Prog. Energy Combust. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1016\/j.cemconcomp.2009.11.003","article-title":"Compressive strength and microstructural characteristics of class C fly ash geopolymer","volume":"32","author":"Guo","year":"2010","journal-title":"Cem. Concr. Compos."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1016\/j.cemconcomp.2017.11.016","article-title":"Mechanical and thermal properties of lightweight geopolymer composites","volume":"86","author":"Colangelo","year":"2018","journal-title":"Cem. Concr. Compos."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1583","DOI":"10.1016\/j.cemconres.2007.08.021","article-title":"Comparative performance of geopolymers made with metakaolin and fly ash after exposure to elevated temperatures","volume":"37","author":"Kong","year":"2007","journal-title":"Cem. Concr. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"680","DOI":"10.1016\/j.conbuildmat.2018.09.116","article-title":"Mechanical properties and microstructure of metakaolin-based geopolymer compound-modified by polyacrylic emulsion and polypropylene fibers","volume":"190","author":"Chen","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Zhou, Y., Xi, B., Sui, L., Zheng, S., Xing, F., and Li, L. (2019). Development of high strain-hardening lightweight engineered cementitious composites: Design and performance. Cem. Concr. Compos., 104.","DOI":"10.1016\/j.cemconcomp.2019.103370"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Xi, B., Zhou, Y., Yu, K., Hu, B., Huang, X., Sui, L., and Xing, F. (2020). Use of nano-SiO2 to develop a high-performance green lightweight engineered cementitious composites containing fly ash cenospheres. J. Clean. Prod., 262.","DOI":"10.1016\/j.jclepro.2020.121274"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"954","DOI":"10.1016\/j.conbuildmat.2013.07.104","article-title":"Mechanical and thermal properties of green lightweight engineered cementitious composites","volume":"48","author":"Huang","year":"2013","journal-title":"Constr. Build. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2447","DOI":"10.1177\/0021998319827078","article-title":"The effect of carbon nanofibers on fresh and mechanical properties of lightweight engineered cementitious composite using hollow glass microspheres","volume":"53","author":"Aslani","year":"2019","journal-title":"J. Compos. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1179","DOI":"10.1617\/s11527-010-9691-8","article-title":"Strain hardening behavior of lightweight hybrid polyvinyl alcohol (PVA) fiber reinforced cement composites","volume":"44","author":"Ahmed","year":"2011","journal-title":"Mater. Struct."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Xu, L.Y., Lao, J.C., Qian, L.P., Khan, M., Xie, T.Y., and Huang, B.T. (2024). Low-carbon high-strength engineered geopolymer composites (HS-EGC) with full-volume fly ash precursor: Role of silica modulus. J. CO2 Util., 88.","DOI":"10.1016\/j.jcou.2024.102948"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Zhu, J.X., Weng, K.F., Liu, W.H., Huang, B.T., Peng, K.D., Zhu, J.H., and Dai, J.G. (2024). Thin-layer Ultra-High-Strength Engineered Cementitious Composites (UHS-ECC) reinforced with small-diameter FRP bars for structural strengthening. Thin-Walled Struct., 205.","DOI":"10.1016\/j.tws.2024.112592"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Xu, L.Y., Yu, J., Huang, B.T., Lao, J.C., Wu, H.L., Jiang, X., Xie, T.Y., and Dai, J.G. (2025). Green and Low-Carbon Matrices for Engineered\/Strain-Hardening Cementitious Composites (ECC\/SHCC): Towards Sustainable and Resilient Infrastructure. J. Clean. Prod., 496.","DOI":"10.1016\/j.jclepro.2025.144968"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1016\/j.compositesb.2015.11.039","article-title":"Matrix design of strain hardening fiber reinforced engineered geopolymer composite","volume":"89","author":"Nematollahi","year":"2016","journal-title":"Compos. Part B Eng."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1016\/j.cemconcomp.2018.02.001","article-title":"An integrated design method of Engineered Geopolymer Composite","volume":"88","author":"Ohno","year":"2018","journal-title":"Cem. Concr. Compos."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Xu, L.Y., Huang, B.T., Li, V.C., and Dai, J.G. (2022). High-strength high-ductility Engineered\/Strain-Hardening Cementitious Composites (ECC\/SHCC) incorporating geopolymer fine aggregates. Cem. Concr. Compos., 125.","DOI":"10.1016\/j.cemconcomp.2021.104296"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Hamcumpai, K., Nuaklong, P., Chindasiriphan, P., Jongvivatsakul, P., Tangaramvong, S., Di Sarno, L., and Likitlersuang, S. (2024). High-strength steel fibre-reinforced geopolymer concrete utilising recycled granite waste and rice husk ash. Constr. Build. Mater., 433.","DOI":"10.1016\/j.conbuildmat.2024.136693"},{"key":"ref_19","first-page":"1","article-title":"Effect of hybrid polypropylene-steel fibres on strength characteristics of UHPFRC","volume":"10","author":"Nuaklong","year":"2020","journal-title":"Adv. Concr. Constr."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Nuaklong, P., Hamcumpai, K., Keawsawasvong, S., Pethrung, S., Jongvivatsakul, P., Tangaramvong, S., Pothisiri, T., and Likitlersuang, S. (2023). Strength and post-fire performance of fiber-reinforced alkali-activated fly ash concrete containing granite industry waste. Constr. Build. Mater., 392.","DOI":"10.1016\/j.conbuildmat.2023.131984"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Zahid, M., Shafiq, N., Razak, S.N.A., and Tufail, R.F. (2020). Investigating the effects of NaOH molarity and the geometry of PVA fibers on the post-cracking and the fracture behavior of engineered geopolymer composite. Constr. Build. Mater., 265.","DOI":"10.1016\/j.conbuildmat.2020.120295"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Pang, Y., Zhu, X., Yang, M., and Yu, J. (2021). Tailoring rheological\u2013strength\u2013ductility properties of self-cleaning geopolymer composites with asphalt emulsion. Constr. Build. Mater., 308.","DOI":"10.1016\/j.conbuildmat.2021.124997"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"402","DOI":"10.1016\/j.compstruct.2017.01.085","article-title":"Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics","volume":"168","author":"Lampropoulos","year":"2017","journal-title":"Compos. Struct."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"18956","DOI":"10.1016\/j.ceramint.2022.03.179","article-title":"Effect of fly ash cenospheres on properties of multi-walled carbon nanotubes and polyvinyl alcohol fibers reinforced geopolymer composites","volume":"48","author":"Cheng","year":"2022","journal-title":"Ceram. Int."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.compositesb.2017.07.058","article-title":"Effect of silica fume and PVA fiber on the abrasion resistance and volume stability of concrete","volume":"130","author":"Wang","year":"2017","journal-title":"Compos. Part B Eng."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Wang, L.E.I., Guo, F., Yang, H., Wang, Y.A.N., and Tang, S. (2021). Comparison of fly ash, PVA fiber, MgO and shrinkage-reducing admixture on the frost resistance of face slab concrete via pore structural and fractal analysis. Fractals, 29.","DOI":"10.1142\/S0218348X21400028"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Wang, L., Zeng, X., Li, Y., Yang, H., and Tang, S. (2022). Influences of MgO and PVA fiber on the abrasion and cracking resistance, pore structure and fractal features of hydraulic concrete. Fractal Fract., 6.","DOI":"10.3390\/fractalfract6110674"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"215","DOI":"10.3151\/jact.1.215","article-title":"On engineered cementitious composites (ECC) a review of the material and its applications","volume":"1","author":"Li","year":"2003","journal-title":"J. Adv. Concr. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"21791","DOI":"10.1016\/j.ceramint.2021.04.196","article-title":"Development of low-calcium fly ash-based geopolymer mortar using nanosilica and hybrid fibers","volume":"47","author":"Chen","year":"2021","journal-title":"Ceram. Int."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"419","DOI":"10.1016\/j.conbuildmat.2018.07.012","article-title":"Tensile behavior and microstructure of hybrid fiber ambient cured one-part engineered geopolymer composites","volume":"184","author":"Alrefaei","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Zhang, H., Sarker, P.K., Wang, Q., He, B., and Jiang, Z. (2021). Strength and toughness of ambient-cured geopolymer concrete containing virgin and recycled fibres in mono and hybrid combinations. Constr. Build. Mater., 304.","DOI":"10.1016\/j.conbuildmat.2021.124649"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/j.cemconcomp.2017.10.011","article-title":"Mechanical properties of ambient cured high strength hybrid steel and synthetic fibers reinforced geopolymer composites","volume":"85","author":"Khan","year":"2018","journal-title":"Cem. Concr. Compos."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"33444","DOI":"10.1016\/j.ceramint.2021.08.251","article-title":"Effect of nano SiO2 on mechanical properties of micro-steel fibers reinforced geopolymer composites","volume":"47","author":"Alomayri","year":"2021","journal-title":"Ceram. Int."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"20027","DOI":"10.1016\/j.ceramint.2020.05.074","article-title":"Mechanical properties and prediction of fracture parameters of geopolymer\/alkali-activated mortar modified with PVA fiber and nano-SiO2","volume":"46","author":"Zhang","year":"2020","journal-title":"Ceram. Int."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Su, Z., Hou, W., and Sun, Z. (2020). Recent advances in carbon nanotube-geopolymer composite. Constr. Build. Mater., 252.","DOI":"10.1016\/j.conbuildmat.2020.118940"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Azeem, M., Junaid, M.T., and Saleem, M.A. (2021). Correlated strength enhancement mechanisms in carbon nanotube based geopolymer and OPC binders. Constr. Build. Mater., 305.","DOI":"10.1016\/j.conbuildmat.2021.124748"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Keshavarz, R., Aghamohammadi, H., and Eslami-Farsani, R. (2020). The effect of graphene nanoplatelets on the flexural properties of fiber metal laminates under marine environmental conditions. Int. J. Adhes. Adhes., 103.","DOI":"10.1016\/j.ijadhadh.2020.102709"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"7374S","DOI":"10.1177\/1528083720947106","article-title":"Recent trend in developing advanced fiber metal laminates reinforced with nanoparticles: A review study","volume":"51","author":"Aghamohammadi","year":"2022","journal-title":"J. Ind. Text."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Aghamohammadi, H., Eslami-Farsani, R., and Tcharkhtchi, A. (2020). The effect of multi-walled carbon nanotubes on the mechanical behavior of basalt fibers metal laminates: An experimental study. Int. J. Adhes. Adhes., 98.","DOI":"10.1016\/j.ijadhadh.2019.102538"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Xing, G., Xu, Y., Huang, J., Lu, Y., Miao, P., Chindasiriphan, P., Jongvivatsakul, P., and Ma, K. (2023). Research on the mechanical properties of steel fibers reinforced carbon nanotubes concrete. Constr. Build. Mater., 392.","DOI":"10.1016\/j.conbuildmat.2023.131880"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Nuaklong, P., Boonchoo, N., Jongvivatsakul, P., Charinpanitkul, T., and Sukontasukkul, P. (2021). Hybrid effect of carbon nanotubes and polypropylene fibers on mechanical properties and fire resistance of cement mortar. Constr. Build. Mater., 275.","DOI":"10.1016\/j.conbuildmat.2020.122189"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Yan, Y., Tian, L., Zhao, W., Lazaro, S.A.M., Li, X., and Tang, S. (2024). Dielectric and mechanical properties of cement pastes incorporated with magnetically aligned reduced graphene oxide. Dev. Built Environ., 18.","DOI":"10.1016\/j.dibe.2024.100471"},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Aslan, A., Salur, E., D\u00fczc\u00fcko\u011flu, H., \u015eahin, \u00d6.S., and Ekrem, M. (2021). The effects of harsh aging environments on the properties of neat and MWCNT reinforced epoxy resins. Constr. Build. Mater., 272.","DOI":"10.1016\/j.conbuildmat.2020.121929"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1080\/10402004.2014.998358","article-title":"Enhancement of wear and friction characteristics of epoxy resin by multiwalled carbon nanotube and boron nitride nanoparticles","volume":"58","author":"Ekinci","year":"2015","journal-title":"Tribol. Trans."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1016\/j.conbuildmat.2013.08.007","article-title":"Multifunctional properties of carbon nanotube\/fly ash geopolymeric nanocomposites","volume":"49","author":"Saafi","year":"2013","journal-title":"Constr. Build. Mater."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"15171","DOI":"10.1016\/j.ceramint.2016.06.080","article-title":"Microstructure and mechanical properties of a metakaolinite-based geopolymer nanocomposite reinforced with carbon nanotubes","volume":"42","author":"Abbasi","year":"2016","journal-title":"Ceram. Int."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/j.conbuildmat.2015.10.121","article-title":"Characterization of alkali activated geopolymer mortar doped with MWCNT","volume":"102","author":"Khater","year":"2016","journal-title":"Constr. Build. Mater."},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Li, F., Yang, Z., Chen, D., Lu, Y., and Li, S. (2021). Research on mechanical properties and micro-mechanism of Engineering Geopolymers Composites (EGCs) incorporated with modified MWCNTs. Constr. Build. Mater., 303.","DOI":"10.1016\/j.conbuildmat.2021.124516"},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Wu, C., Zhou, P., Li, Q., Li, J., and Zhu, D. (2025). Assessing the carbon reduction potential of high-performance concrete in urban construction. Sustain. Chem. Pharm., 47.","DOI":"10.1016\/j.scp.2025.102170"},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Li, S., Han, G., Du, B., Jiang, Z., and Sun, L. (2025). Carbon emissions assessment of ultra-high performance concrete in construction industry: Calculation method and case study. Energy Build., 329.","DOI":"10.1016\/j.enbuild.2024.115260"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/j.conbuildmat.2015.03.036","article-title":"Geopolymer concrete: A review of some recent developments","volume":"85","author":"Singh","year":"2015","journal-title":"Constr. Build. Mater."},{"key":"ref_52","unstructured":"(2005). Test Method for Fluidity of Cement Mortar (Standard No. GB\/T 2419-2005)."},{"key":"ref_53","unstructured":"JSCE (Japan Society of Civil Engineers) (1984). Method of Tests for Flexural Strength and Flexural Toughness of Steel-Fiber-Reinforced Concrete, JSCE. JSCE-SF4."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"629","DOI":"10.1016\/j.conbuildmat.2016.02.228","article-title":"High tensile strength fly ash based geopolymer composite using copper coated micro steel fiber","volume":"112","author":"Ranjbar","year":"2016","journal-title":"Constr. Build. Mater."},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Nguy\u1ec5n, H.H., L\u01b0\u01a1ng, Q.H., Choi, J.I., Ranade, R., Li, V.C., and Lee, B.Y. (2021). Ultra-ductile behavior of fly ash-based engineered geopolymer composites with a tensile strain capacity up to 13.7%. Cem. Concr. Compos., 122.","DOI":"10.1016\/j.cemconcomp.2021.104133"},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"399","DOI":"10.1061\/(ASCE)0899-1561(2001)13:6(399)","article-title":"Measuring and modifying interface properties of PVA fibers in ECC matrix","volume":"13","author":"Redon","year":"2001","journal-title":"J. Mater. Civ. 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