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Prethodno priopćenje

https://doi.org/10.14256/JCE.3543.2022

Some aspects of the suitability of three-stage mixing for ready-mixed concrete

Alena Sičáková
Jeonghyun Kim


Puni tekst: hrvatski pdf 1.949 Kb

str. 709-718

preuzimanja: 6

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Puni tekst: engleski pdf 982 Kb

str. 709-718

preuzimanja: 7

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Sažetak

Several studies have indicated that three-stage mixing (TM) methods improve the mechanical strength and slump of concrete compared to those of normal mixing methods, particularly when a recycled concrete aggregate is used. However, most studies did not address the technological aspects of ready-mixed concrete, including continuous mixing during site delivery. In this study, the properties of concrete (slump and compressive strength) based on the time lapse after mixing via the TM method (i.e. immediately, 45 min, and 90 min after mixing) were investigated, and the samples were tested after three years of curing. The results indicate some positive effects of TM on ready-mixed concrete and its characteristics on a delivery to the construction site, particularly a less severe loss of consistency compared to that of conventional mixing, as well as a positive effect on the compressive strength when fly ash is used as an aggregate coating additive in the first stage of concrete mixing.

Ključne riječi

concrete; recycled concrete aggregate; three-stage mixing; mixing time; consistency; compressive strength

Hrčak ID:

321019

URI

https://hrcak.srce.hr/321019

Datum izdavanja:

30.9.2024.

Podaci na drugim jezicima: hrvatski

Posjeta: 37 *