Construction and Ready-Mix waste constitutes one of the increasing waste potentially useful material is disposed of as landfill. The environmental and economic implications of these are no longer considered sustainable and, as a result, the construction industry is experiencing challenges to overcome this practise. This investigation was aimed at examining the effects of recycled aggregates, ready-mix waste and laboratory waste on the properties of fresh and hardened concrete. Demolished material exhibited lower compressive and flexural strength and high initial slump. Laboratory waste on the other hand, showed a slight decrease in compressive and flexural strength, it however had a constant initial slump and good durability properties. The returned ready mix stone and sand material showed more positive results in most properties as compared to the other two waste materials. This work has demonstrated that there is a potential in utilising recycled aggregate in producing concrete although the actual percentage of substitution has to be determined by the intended application.