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The influence of calcium nitrate on setting and hardening rate of Portland cement concrete at different temperatures
Calcium nitrate in mortars and concrete is used as a multifunctional additive: as set accelerator, plasticizer, long term strength enhancer and as antifreeze admixture. Used binding material and the amount of calcium nitrate, affect the characteristics of the concrete mixture and strength of hardened concrete. The setting time of the initial and the final binding at different temperatures of hardening (+ 20 °C and + 5 °C) of the pastes made of different cements (Portland cement CEM I 42.5 R and Portland limestone cement CEM II/A-LL 42.5 R) and various amounts of calcium nitrate from 1 % until 3 % were investigated. The effect of calcium nitrate on technological characteristics of concrete mixture (the consistency of the mixture, the density, and the amount of air in the mixture), on early concrete strength after 2 and 7 days, as well as on standard concrete strength after 28 days at different temperatures (at + 20 °C and + 5 °C) were analysed.
The influence of calcium nitrate on setting and hardening rate of Portland cement concrete at different temperatures
Calcium nitrate in mortars and concrete is used as a multifunctional additive: as set accelerator, plasticizer, long term strength enhancer and as antifreeze admixture. Used binding material and the amount of calcium nitrate, affect the characteristics of the concrete mixture and strength of hardened concrete. The setting time of the initial and the final binding at different temperatures of hardening (+ 20 °C and + 5 °C) of the pastes made of different cements (Portland cement CEM I 42.5 R and Portland limestone cement CEM II/A-LL 42.5 R) and various amounts of calcium nitrate from 1 % until 3 % were investigated. The effect of calcium nitrate on technological characteristics of concrete mixture (the consistency of the mixture, the density, and the amount of air in the mixture), on early concrete strength after 2 and 7 days, as well as on standard concrete strength after 28 days at different temperatures (at + 20 °C and + 5 °C) were analysed.
The influence of calcium nitrate on setting and hardening rate of Portland cement concrete at different temperatures
Kičaitė, Asta (Autor:in) / Pundienė, Ina (Autor:in) / Skripkiūnas, Gintautas (Autor:in)
01.01.2017
IOP Conference Series: Materials Science and Engineering. Vol. 251. 3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017), 27-29 September 2017, Riga, Latvia, Bristol : IOP Publishing Ltd, 2017, Vol. 251, art. no. 012017, p. 1-8 ; ISSN 1757-8981 ; eISSN 1757-899X
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
| BASE | 2020
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