Mehmannavaz Taha, Ismail Mohammad, Radin Sumadi Salihuddin, Rafique Bhutta Muhammad Aamer, Samadi Mostafa, Sajjadi Seyed Mahdi
Construction Research Centre, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia.
ScientificWorldJournal. 2014 Feb 13;2014:461241. doi: 10.1155/2014/461241. eCollection 2014.
The binary effect of pulverized fuel ash (PFA) and palm oil fuel ash (POFA) on heat of hydration of aerated concrete was studied. Three aerated concrete mixes were prepared, namely, concrete containing 100% ordinary Portland cement (control sample or Type I), binary concrete made from 50% POFA (Type II), and ternary concrete containing 30% POFA and 20% PFA (Type III). It is found that the temperature increases due to heat of hydration through all the concrete specimens especially in the control sample. However, the total temperature rises caused by the heat of hydration through both of the new binary and ternary concrete were significantly lower than the control sample. The obtained results reveal that the replacement of Portland cement with binary and ternary materials is beneficial, particularly for mass concrete where thermal cracking due to extreme heat rise is of great concern.
研究了粉煤灰（PFA）和棕榈油燃料灰（POFA）对加气混凝土水化热的二元效应。制备了三种加气混凝土混合物，即含有100%普通硅酸盐水泥的混凝土（对照样品或I型）、由50%POFA制成的二元混凝土（II型）和含有30%POFA和20%PFA的三元混凝土（III型）。结果发现，所有混凝土试件由于水化热导致温度升高，尤其是对照样品。然而，新的二元和三元混凝土水化热引起的总温度上升明显低于对照样品。所得结果表明，用二元和三元材料替代硅酸盐水泥是有益的，特别是对于大体积混凝土，在大体积混凝土中，由于极端热升引起的热裂缝是非常令人担忧的问题。
