Experimental and Analytical Studies on Fracture Behavior of Fiber-Reinforced Structural Lightweight Aggregate Concrete

Sahoo, Sumit and Lakavath, Chandrashekhar and Prakash, S. Suriya (2021) Experimental and Analytical Studies on Fracture Behavior of Fiber-Reinforced Structural Lightweight Aggregate Concrete. Journal of Materials in Civil Engineering, 33 (5). 04021074. ISSN 0899-1561

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Abstract

This study presents the fracture behavior of synthetic fiber-reinforced structural lightweight aggregate concrete (SynFR-SLWAC) by experimental and analytical studies. Experimental studies include testing of 15 specimens for understanding mode-1 fracture response. Analytical studies include developing multilinear stress-crack width relations through inverse analysis. SynFR-SLWAC is made using sintered fly ash aggregate (SFA) with varying volume fractions of monofilament macro synthetic (0.2%, 0.4%, and 0.6%) and a small fraction of micro synthetic fibers (0.02%). The effect of synthetic fiber addition on the crack arresting mechanisms of SynFR-SLWAC is studied using the digital image correlation (DIC) technique. The stress-crack width relations are obtained from the experimental load-crack mouth opening displacement (CMOD) curves using inverse analysis. Additionally, empirical equations are proposed for predicting the stress-crack width relationship for SynFR-SLWAC with different fiber volume fractions. Fracture energy increased significantly with an increase in fiber volume dosage at larger values of crack width. Hinge width of SynFR-SLWAC reduced when compared to normal density concrete made of natural coarse aggregates.

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IITH Creators:
IITH CreatorsORCiD
Sahoo, SumitUNSPECIFIED
Lakavath, ChandrashekharUNSPECIFIED
Prakash, S. SuriyaUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Analytical studies; Crack mouth opening displacement; D. digital image correlation (DIC); Empirical equations; Fiber volume fractions; Fly ash aggregates; Light-weight aggregate concrete; Stress-crack width relationships;Aggregates; Concrete aggregates; Cracks; Fly ash; Fracture; Fracture mechanics; Fracture testing; Light weight concrete; Synthetic fibers; Volume fraction
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 28 Jul 2021 05:05
Last Modified: 28 Jul 2021 05:05
URI: http://raiith.iith.ac.in/id/eprint/8550
Publisher URL: http://doi.org/10.1061/(ASCE)MT.1943-5533.0003680
OA policy: https://v2.sherpa.ac.uk/id/publication/11572
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