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Assessment of fracture toughness in fibrous concrete via Brazilian test: Experimental study with low-clinker cementitious binder

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dc.citedby2
dc.contributor.authorVenu H.en_US
dc.contributor.authorMurali G.en_US
dc.contributor.authorRamkumar V.R.en_US
dc.contributor.authorSieh Kiong T.en_US
dc.contributor.authorMazlini Razali N.en_US
dc.contributor.authorid57189525542en_US
dc.contributor.authorid57203952839en_US
dc.contributor.authorid56585579400en_US
dc.contributor.authorid59145289600en_US
dc.contributor.authorid59305084800en_US
dc.date.accessioned2025-03-03T07:41:59Z
dc.date.available2025-03-03T07:41:59Z
dc.date.issued2024
dc.description.abstractAs the predominant and cost-effective material in the construction industry, concrete is susceptible to tension weaknesses, leading to significant flaws such as cracking and brittle fracturing. Recent advancements in fibrous concrete have emerged as a solution to mitigate these issues. Incorporating steel fibers in concrete has emerged as a promising solution to improve crack resistance and structural integrity. This study focuses on developing eco-friendly concrete using a low-clinker cementitious binder and short steel fibers to enhance fracture toughness and mitigate the environmental impact by effectively utilizing lime sludge. Concrete specimens were prepared with three binder types: treated lime sludge (TLS) at 15 % and 30 % and calcined clay (CC) at 15 % and 30 %, replacing conventional clinker. Short steel fibers were added at 1.5 % by volume to enhance mechanical properties. Fracture toughness was evaluated using notched Brazilian disc specimens, assessing mode I, II, and mixed-mode (I/II) fracture at multiple notch orientations (? = 0�, 15�, 28.83�, 45�, 60�, 75�, and 90�). Microstructural analysis during strength development was performed using scanning electron microscopy and X-ray diffraction. The findings revealed that specimens containing 15 % TLS, 30 % CC, and 1.5 % steel fibers exhibited the highest fracture toughness. Mode II fracture toughness exceeded mode I, indicating improved resistance to crack propagation. The addition of fibers to the specimens under mode II demonstrated improved fracture toughness, ranging from 0.44 to 0.53 MPa�m^1/2 compared to the corresponding non-fibrous specimens. The fibrous specimens showed significantly higher ultimate loads at ? = 90� compared to ? = 0�, indicating superior crack resistance and structural integrity under perpendicular loading conditions. The Brazilian disc specimens demonstrated variability in fracture toughness across different loading orientations, highlighting their suitability for mixed-mode fracture assessment. ? 2024 Elsevier Ltden_US
dc.description.natureFinalen_US
dc.identifier.ArtNo104641
dc.identifier.doi10.1016/j.tafmec.2024.104641
dc.identifier.scopus2-s2.0-85202556280
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85202556280&doi=10.1016%2fj.tafmec.2024.104641&partnerID=40&md5=a85d5a51de60cacb8420db6fe40f44a0
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/36337
dc.identifier.volume133
dc.publisherElsevier B.V.en_US
dc.sourceScopus
dc.sourcetitleTheoretical and Applied Fracture Mechanics
dc.subjectBrittle fracture
dc.subjectConcrete industry
dc.subjectConcretes
dc.subjectCrack propagation
dc.subjectEnergy conservation
dc.subjectFracture toughness
dc.subjectBrazilian disc specimen
dc.subjectCalcined clay
dc.subjectCementitious binders
dc.subjectCrack resistance
dc.subjectEnergy savings
dc.subjectEnergy-savings
dc.subjectFibrous concrete
dc.subjectLime sludge
dc.subjectLoading angle
dc.subjectStress-intensity factors
dc.subjectBinders
dc.titleAssessment of fracture toughness in fibrous concrete via Brazilian test: Experimental study with low-clinker cementitious binderen_US
dc.typeArticleen_US
dspace.entity.typePublication
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