Tehnički vjesnik, Vol. 33 No. 6, 2026.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20260520003613
Experimental Determination of Sound Insulation Values of Concrete Slabs with Grape and Cherry Pits Content
Anđelko Crnoja
; University North, 104. brigade 3, 42000 Varaždin
*
Ivo Čolak
; University of Mostar Faculty of Civil Engineering, Architecture and Geodesy Matice hrvatske bb, Mostar
Aleksej Aniskin
; University North, 104. brigade 3, 42000 Varaždin
Dalibor Kramarić
; University North, 104. brigade 3, 42000 Varaždin
* Dopisni autor.
Sažetak
This paper investigates the sound insulation of thin concrete slabs in which part of the coarse aggregate is replaced by fruit pits as a sustainable alternative to natural aggregates. Three mixtures were tested: reference concrete without agricultural waste (M1), concrete with grape pits (M2) and concrete with cherry pits (M3), all slabs having a thickness of 50 mm. Airborne sound insulation was determined in a dedicated test box with broadband white noise of a given level, which represents a proposal for a simple experimental method for comparative tests not covered by existing standards. The obtained results are therefore of relative character and describe the tendencies of the behavior of the selected materials under given test conditions. The reference concrete achieves the highest average airborne sound insulation, while the mixtures with grape and cherry pits show reduced values in accordance with the law of mass and the reduced surface mass of the slabs. Smaller and more elongated grape stones cause a moderate decrease in insulation, while larger and more voluminous cherry pits lead to a more pronounced decrease. The observed trends are consistent with previous studies of lightweight concretes based on agricultural waste, in which low-density porous aggregates improve sustainability and thermal properties, but reduce airborne sound insulation of thin single-layer elements. The obtained results contribute to the database on the acoustic properties of concrete with fruit pits and indicate the need to optimize the type and proportion of aggregates in order to achieve a balance between acoustic, mechanical and environmental performances.
Ključne riječi
acoustic properties; fruit pits; sound insulation; sustainable materials
Hrčak ID:
353098
URI
Datum izdavanja:
7.11.2026.
Posjeta: 0 *