Original scientific paper
https://doi.org/10.13167/2024.28.1
Cotton knitted fabric waste as reinforcement in cement screed
Sandra Juradin
orcid.org/0000-0001-5964-6226
; University of Split, Faculty of Civil Engineering, Architecture and Geodesy, Matice hrvatske 15, 21000 Split, Croatia
*
Bruno Bartulović
; University of Split, Faculty of Civil Engineering, Architecture and Geodesy, Matice hrvatske 15, 21000 Split, Croatia
Dujmo Žižić
; University of Split, Faculty of Civil Engineering, Architecture and Geodesy, Matice hrvatske 15, 21000 Split, Croatia
Silvija Mrakovčić
orcid.org/0000-0001-5130-8767
; University of Rijeka, Faculty of Civil Engineering,, Radmile Matejčić 3, 51000 Rijeka, Croatia
* Corresponding author.
Abstract
Cement screed consists of cement, sharp sand and water, laid as a thin layer over the concrete subfloor. Although the screed is strong, it can be additionally reinforced with fibres, most often polypropylene fibres. In this study, cotton knitted fabric waste (CKFW) was obtained from a local factory producing underwear to reinforce the cement screed. A total of eight mixtures were made: reference mixture, screed reinforced with polypropylene fibres and six mixtures reinforced with CKFW. CKFW was added in 1,25 %, 2,50 % and 5,00 % of the total volume. Before adding to the mixtures, the first CKFW group was saturated with tap water, whereas, the second CKFW group was saturated with dispersion that improves adhesion. The density and air content of the fresh mixtures were tested, and the compressive strength and flexural strength were determined when the specimens were 28 days old. The specific fracture energy is determined based on the curve from the plot of load vs. displacement. The CKFW increases the ductility of cement screeds, although it has no significant effect on the compressive and flexural strength of the specimens. The CKFW that was saturated with tap water achieved better results.
Keywords
cement screed; cotton knitted fabric waste; compressive and flexural strength; specific fracture energy
Hrčak ID:
314550
URI
Publication date:
19.2.2024.
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