Modifying the properties of cement by including mineral-based additives into cement ensures benefits such as preventing environmental hazards of waste additives and providing increase in cement amount. Based on these main considerations, as a part of the study in which contribution of ash, obtained as a result of the burning of oil shale rocks in fluidized bed thermal plants, to Portland cement (PC) in 15% ratio is chemically proven, this study is performed in order to understand the direction and severity of the effects that oil shale ash (OSA) might have on the properties of cements. For this purpose, freezing-thawing experiments were performed on cement samples produced with PC 42.5 cement, which has 0, 10, 20, and 30% of OSA additions. It is desired to make a conclusion by finding weight loss factor (AFw) and relative elasticity module (E) loss related with press and ultrasonic test methods based on given experiments. As a result, it was observed that durability of concretes obtained by addition of oil shale rocks in 15% ratio to PC 42.5 cements against freezing/thawing effects is greater than that of PC 42.5 control sample.
Part of the book: Sustainable Construction and Building Materials