Artificial lightweight aggregate containing a large amount of fly ash and its manufacturing method

摘要

The present invention relates to a lightweight aggregate consisting of 40 to 90% by weight of fly ash and 10 to 60% by weight of shale and a manufacturing method thereof. According to the present invention, the fly ash 40 to 90% by weight, the SiO ₂ content is 55% by weight or less and the total content of CaO, MgO, Na ₂ O, K ₂ O and FeO 10 to 60% by weight of shale Kneading and granulation by adding water to the% consists of firing at 1140 ~ 1355 ℃ in the air or in a reducing atmosphere.