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Flaw-tailored ECC enabled by pore optimization: A synergistic strategy for concurrent strength enhancement and strain hardening amplification

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dc.contributor.authorFu, C.
dc.contributor.authorHu, Y.
dc.contributor.authorZhang, Y.
dc.contributor.authorZhuge, Y.
dc.contributor.authorGu, G.
dc.contributor.authorDong, B.
dc.date.issued2025
dc.description.abstractThis study systematically investigates the pore structure optimization of Engineered Cementitious Composites (ECC) through air entraining agent (AEA) incorporation, addressing the critical trade-off between tensile ductility and mechanical strength. Experimental results demonstrate that a low AEA dosage (0.015 g/L) enhances compressive strength by 9.54 %, tensile strain capacity by 92.47 % and cracks number by 209.1 %. Despite high AEA concentrations will decrease the mechanical strength, the strain hardening and saturation cracking capacity of ECC incorporating AEA still significantly superior to control group by 63.44 % and 90.9 % respectively. Based cracking criteria, it can be found that ECC incorporating AEA can significantly optimize its flaws size distribution, resulting in high strain hardening capacity. Through the underlying mechanism analysis, it is found that the optimized pore spatial structure can take advantage of the stress concentration effect of pores to cause the deflection and bifurcation of cracks, thus significantly improving the multiple cracking and energy absorption capacity of ECC. This simple optimization method innovatively achieves both the effect of strengthening and toughening, which provides a novel reference for future research and application.
dc.identifier.citationConstruction and Building Materials, 2025; 496(143810):143810-143810
dc.identifier.doi10.1016/j.conbuildmat.2025.143810
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.orcidZhuge, Y. [0000-0003-1620-6743]
dc.identifier.urihttps://hdl.handle.net/11541.2/44815
dc.language.isoen
dc.publisherElsevier BV
dc.relation.fundingShenzhen University GDDCE 24-25-09
dc.relation.fundingNational Natural Science Foundation of China 52408303
dc.relation.fundingNational Natural Science Foundation of China 52378271
dc.rightsCopyright 2025 Elsevier
dc.source.urihttps://doi.org/10.1016/j.conbuildmat.2025.143810
dc.subjectair entraining agent
dc.subjectECC
dc.subjectmultiple cracking
dc.subjectstrain hardening
dc.subjecttoughening
dc.titleFlaw-tailored ECC enabled by pore optimization: A synergistic strategy for concurrent strength enhancement and strain hardening amplification
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9917076197101831

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