Mechanical characterization of structural lightweight aggregate concrete made with sintered fly ash aggregates and synthetic fibres

UNSPECIFIED (2020) Mechanical characterization of structural lightweight aggregate concrete made with sintered fly ash aggregates and synthetic fibres. Cement and Concrete Composites, 113. pp. 1-17. ISSN 0958-9465

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Abstract

This study explores the development of fibre reinforced structural lightweight aggregate concrete (SLWAC) using sintered fly ash aggregate (SFA) as coarse aggregate. SFA is manufactured from fly ash, an industrial by-product, thus making SLWAC a sustainable building material. SLWAC of density 1800 kg/m3 is developed with and without the addition of synthetic polyolefin (macro and micro) fibres to achieve a target compressive strength of 40 MPa. The main objective of this study is to understand the mechanical properties of SLWAC made of SFA and the influence of fibres in improving mechanical properties of SLWAC. The effect of monofilament macro-synthetic fibre dosages of 0.2%, 0.4%, and 0.6%, as well as the fibrillated micro fibres of 0.02% on the mechanical properties of SLWAC is studied. Tests were carried out for understanding the stress-strain behaviour under compression, split tensile strength, and fracture behaviour under flexure. Digital image correlation technique is used to study the crack propagation in fracture and splitting tension tests. A significant improvement in flexural strength, splitting tensile strength and toughness of SLWAC is observed due to the addition of synthetic fibres. Fibres significantly contributed to load resistance by arresting both micro and macro cracks. Thus, with the help of synthetic fibres addition in SLWAC, the desirable mechanical properties for structural applications such as strength and ductility can be achieved at reduced density. © 2020 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Suriya Prakash, S	0000-0003-0319-1773

Item Type:

Article

Additional Information:

This research work was sponsored by “IMPRINT Scheme” funded by Ministry of Human Resource Development and Department of Science and Technology , India. The sanction order number is IMP_2018_000846. The authors would like to thank the funding agency for their generous support.

Uncontrolled Keywords:

Fibrillated micro fibres; Monofilament macro fibre; Polyolefin fibres; Sintered fly ash aggregate; Structural lightweight concrete

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

15 Nov 2022 08:55

Last Modified:

15 Nov 2022 08:55