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Title: Crushed rubber waste impact of concrete basic properties
Authors: Girskas, Giedrius
Nagrockienė, Džigita
Keywords: Crushed rubber powder
Industrial waste
Effective porosity
Structural performance indicators
Predicted freeze-thaw resistance
Issue Date: 2017
Publisher: Elsevier
Citation: Girskas, G., Nagrockienė, D., 2017. Crushed rubber waste impact of concrete basic properties. Construction and Building Materials. 140, 36-42.
Series/Report no.: 140;
Abstract: Cement CEM I 42.5 N was used for the investigation. Waste tire crumb rubber classified into fractions 2/4 and 4/6 was used for the tests. Sand in concrete mixes was replaced by crumb rubber at the proportion from 5% to 20%. Compressive strength, water absorption, ultrasonic pulse velocity in concrete modified with crumb rubber were measured in the tests. Structural performance indicators of concrete specimens were calculated. The tests results revealed that compressive strength dropped 68–61.3%. The calculation of structural performance indicators showed that higher content of crumb rubber in the mix reduces the relative pore and capillary wall thickness and the spare pore space. With higher content of crumb rubber in the specimens the spatial inhomogeneity indicator gradually increases because the bigger amount of coarser rubber granule causes uneven distribution of pores and capillaries by their length. When up to 20% of fine aggregate in concrete mixes is replaced by crumb rubber the predicted freeze-thaw resistance increases.
ISSN: 0950-0618
Appears in Collections:Moksliniai straipsniai / Research articles

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