Tang Wei Le, Lee Han-Seung, Vimonsatit Vanissorn, Htut Trevor, Singh Jitendra Kumar, Wan Hassan Wan Nur Firdaus, Ismail Mohamed A, Seikh Asiful H, Alharthi Nabeel
School of Civil and Mechanical Engineering, Curtin University, Bentley, Perth 6102, Australia.
Department of Architectural Engineering, Hanyang University, 1271 Sa3-dong, Sangrok-gu, Ansan 15588, Korea.
Materials (Basel). 2019 Jan 3;12(1):130. doi: 10.3390/ma12010130.
The carbonation rate of reinforced concrete is influenced by three parameters, namely temperature, relative humidity, and concentration of carbon dioxide (CO₂) in the surroundings. As knowledge of the service lifespan of reinforced concrete is crucial in terms of corrosion, the carbonation process is important to study, and high-performance durable reinforced concretes can be produced to prolong the effects of corrosion. To examine carbonation resistance, accelerated carbonation testing was conducted in accordance with the standards of BS 1881-210:2013. In this study, 10⁻30% of micro palm oil fuel ash (mPOFA) and 0.5⁻1.5% of nano-POFA (nPOFA) were incorporated into concrete mixtures to determine the optimum amount for achieving the highest carbonation resistance after 28 days water curing and accelerated CO₂ conditions up to 70 days of exposure. The effect of carbonation on concrete specimens with the inclusion of mPOFA and nPOFA was investigated. The carbonation depth was identified by phenolphthalein solution. The highest carbonation resistance of concrete was found after the inclusion of 10% mPOFA and 0.5% nPOFA, while the lowest carbonation resistance was found after the inclusion of 30% mPOFA and 1.5% nPOFA.
钢筋混凝土的碳化速率受三个参数影响，即温度、相对湿度和周围环境中二氧化碳（CO₂）的浓度。鉴于钢筋混凝土使用寿命的知识对于腐蚀而言至关重要，碳化过程很值得研究，并且可以生产高性能耐用的钢筋混凝土来延长腐蚀的影响。为检测抗碳化性能，按照BS 1881 - 210:2013标准进行了加速碳化试验。在本研究中，将10% - 30%的微棕榈油燃料灰（mPOFA）和0.5% - 1.5%的纳米棕榈油燃料灰（nPOFA）掺入混凝土混合物中，以确定在28天的水养护和长达70天的加速CO₂条件下暴露后实现最高抗碳化性能的最佳用量。研究了掺入mPOFA和nPOFA对混凝土试件碳化的影响。通过酚酞溶液确定碳化深度。发现掺入10% mPOFA和0.5% nPOFA后混凝土的抗碳化性能最高，而掺入30% mPOFA和1.5% nPOFA后抗碳化性能最低。
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