ABSTRACT
Abstract For economic and technical reasons numerous industrial by products are being used in blended cements and concrete industries. As example, cement plants generate cement dust from out giong gas by filters during the coarse of their operation. In this work, cement dust, was used with diffe rent percentages as paratial replacement of cement. Water reducer was used to improve the properties of cement paste. Different kinds of Egyptian blended cements were tested to make a comparison between them and cement dust.
