Abstract
Red mud is a waste generated by the aluminium industry, and its disposal is a major problem for this industry. Red mud has a reddish-brown color and superfine particle characteristics. So, it can be a promising pigment admixture for concrete industry. An experimental study is conducted to investigate the potential use of red mud in colored concrete. The micro structures of red mud and iron oxide pigment such as porosity, pore size distribution, diameter of particle are analyzed with the aid of SEM, X-ray diffraction(XRD), and the infrared absorbance. Tests on physical properties of colored concrete, such as strength, slump, early shrinkage crack patterns, and color characteristics are carried out and the results are reported in this paper.
