Utilization of lignite coal ash and steel slag in fly ash brick manufacturing: A review

Brick plays an important role in the construction industry due their excellent properties like compressive strength and durability. From the earliest times they were considered an important factor in the purpose of the building. Considering the different types of bricks, fly bricks are the best in recent times because they are resource intensive and cost effective. This article provides an up-to-date review of current studies of bricks, categorizing these publications according to the materials used and the methods used for the production of invention bricks. In addition, this article makes an important note about coal ash, which may be the focus of future brick products as an alternative to fly-gray bricks with some amount of steel slug, and the main challenge is to go one step further in the properties of the bricks by implementing the respective requirements.