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Investigation of physical and mechanical properties of concrete with crystallization additive

Abstract

The article analyses what effect crystallization additive usage has on concrete physical and mechanical properties and shrinkage to find most effective concrete additive. Investigations of concrete properties with various amounts of crystallization admixture were performed. 9 concrete mixtures with different amounts of crystallizing admixtures were formed and admixtures were added to the concrete mixes from 0.6% to 1.4% of the cement mass, in increments of 0.1%. During the research, the influence of the amount of crystallization admixture the density of hardened concrete, flexural strength, compressive strength, and shrinkage was determined. After evaluating the physical, mechanical properties and shrinkage of the concrete, it was determined that the optimal amount of crystallizing admixture in the concrete mixture is 1% of the cement mass. Thus, it can be argued that the use of a crystallizing admixture has a positive effect i.e., reduces the shrinkage of concrete, because of which cracks in concrete structures can be avoided.


Article in Lithuanian.


Betono su kristalizuojančiąja įmaiša fizikinių ir mechaninių savybių tyrimai


Santrauka


Straipsnyje nagrinėjama, kokį poveikį turi kristalizuojančiosios įmaišos kiekis betono fizikinėms ir mechaninėms savybėms bei traukumui, norint atrasti efektyvią betono įmaišą, kuri mažintų plyšių atsiradimą konstrukcijose. Atlikti betono savybių tyrimai su įvairiais kristalizuojančiosios įmaišos kiekiais. Buvo sumaišyti 9 betono mišiniai su skirtingais kiekiais kristalizuojančiosios įmaišos. Įmaišos į betono mišinius buvo dedama nuo 0,6 % iki 1,4 % nuo cemento masės, žingsniu kas 0,1 %. Tyrimų metu nustatyta kristalizuojančiosios įmaišos kiekio įtaka sukietėjusio betono tankiui, lenkimo stipriui, gniuždymo stipriui bei traukumui. Įvertinus betono fizikines ir mechanines savybes bei traukumą nustatyta, kad optimalus kristalizuojančiosios įmaišos kiekis mišinyje yra 1 % nuo cemento masės. Taigi, galima teigti, kad kristalizuojančiosios įmaišos naudojimas duoda teigiamą efektą, t. y. mažina betono traukumą, dėl to būtų galima išvengti atsirandančių įtrūkių betono konstrukcijose.


Reikšminiai žodžiai: betonas, kristalizuojančioji įmaiša, traukumas, gniuždymo stipris, ultragarso impulso sklidimo greitis, tankis.

Keyword : concrete, crystallization admixture, shrinkage, compressive strength, ultrasonic pulse velocity, density

How to Cite
Pocius, E., & Čepulis, A. (2022). Investigation of physical and mechanical properties of concrete with crystallization additive. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, 14. https://doi.org/10.3846/mla.2022.15188
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Feb 14, 2022
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