The Effect of Curing Conditions on the Durability of High Performance Concrete
IOP Conference Series: Materials Science and Engineering 2017
Ģirts Būmanis, Diāna Bajāre

This study researches compressive strength and durability of the high strength self-compacting concrete (SCC) impacted at early stage by the curing conditions. The mixture compositions of metakaolin containing waste and cenospheres as partial cement replacement (15 wt%) were compared to reference SCC with 100% cement. The specimens prepared in advance were demoulded 24h after casting of the SCC and the specific curing conditions were applied for up to 28 days: standard water curing at 20°C (i); indoor curing at 20°C, RH 60% (ii) and low temperature air curing (2°C) at RH 60% (iii). Results indicate that at early stage (14 days) indoor curing conditions increase compressive strength of the SCC whilst no strength loss has been detected even at a low temperature curing. The further strength gain has been substantially reduced for samples cured indoor and at a low temperature with significant variation observed for long term compressive strength (180 days). The metakaolin containing waste has proved to be an effective partial cement replacement and it has improved strength gain even at a low temperature curing. Meanwhile cenospheres have reduced the SCC strength and with no positive effect on strength observed within the standard term. Freeze-thaw durability and resistance to the chloride penetration have been improved for the SCC cured at low temperature. The SCC with metakaolin containing waste has proved to be the most durable thus demonstrating importance of effective micro filler use.


Atslēgas vārdi
concrete
DOI
10.1088/1757-899X/251/1/012006
Hipersaite
http://iopscience.iop.org/article/10.1088/1757-899X/251/1/012006/meta

Būmanis, Ģ., Bajāre, D. The Effect of Curing Conditions on the Durability of High Performance Concrete. No: IOP Conference Series: Materials Science and Engineering, Latvija, Riga, 27.-29. septembris, 2017. .: IOP Publishing, 2017, 1.-7.lpp. ISSN 1757-8981. e-ISSN 1757-899X. Pieejams: doi:10.1088/1757-899X/251/1/012006

Publikācijas valoda
English (en)
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