Variation of Compressive Strength of Fresh and Precast Concrete in 3 Years in Sulfate
- 10.2991/amcce-18.2018.100How to use a DOI?
- fresh concrete, precast concrete, immersion test, Na2SO4 solution, variation of comprehensive compressive strength, proportion of fly ash
We conducted an immersion test for fresh and precast concrete in Na2SO4 solution of 5 g/L over 3 years. The water-to-binder ratio is 0.50 and the proportions of fly ash are 0-35%. The descent rate of compressive strength curve is regarded as the criterion, and the conclusions are as follows: (1) For corroded concrete, the compressive strength has a dividing point between strengthening phase and damage phase. The dividing point of precast concrete is 540-720d, and is not related to content of fly ash. The dividing point of fresh concrete is 180-720d, and is further delayed with an increase in content of fly ash. (2) The optimum value of fly ash for both fresh and precast concrete is 25%. (3) For non-corroded concrete, fly ash decreases the compressive strength before 180 days, and increases in a given time interval of 270-720d, but over long durations, the compressive strength is approximately the same regardless of fly ash content. (4) The sulfate corrosion resistance of precast concrete is higher than that of fresh concrete.
- © 2018, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Xiaoxu Yu AU - Jingshu Zhang AU - Xinmian Li AU - Qingyou Dong AU - Yinhua Zhang PY - 2018/05 DA - 2018/05 TI - Variation of Compressive Strength of Fresh and Precast Concrete in 3 Years in Sulfate BT - Proceedings of the 2018 3rd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 2018) PB - Atlantis Press SP - 580 EP - 586 SN - 2352-5401 UR - https://doi.org/10.2991/amcce-18.2018.100 DO - 10.2991/amcce-18.2018.100 ID - Yu2018/05 ER -