Using of Pulverized Fuel Ash as a Solid Waste Material to Produce Aggregate and Concrete

In this research, an ideal concept was applied in order to contribute to the efforts of resolving waste harm problems in our civilization. Recycling of municipal solid waste considered as one of the engineering technique which can be applied to eliminate discharges to the environment and reduce toxicity. Concrete technology can propose some strategies for recycling municipal solid wastes; such as using of fly ash (FA) in concrete production. In this study, artificial aggregates were used to produce high performance concretes. An energy saving process namely cold-bonded was applied for preparing artificial aggregate from a dry mixture of FA and Portland cement. A part of synthetic FA aggregate was improved by utilizing of soluble solution of sodium silicates. The type of high performance concrete in this study is self-compacting concrete (SCC) which was made with different water to binder (w/b) ratios. Fresh and transport properties as well as compressive strength of SCC were investigated. The results revealed that the improvement of artificial FA aggregate significantly affected the properties of SCC. The compressive strength at 28 day of SCC was found to be 30 MPa to 73 MPa at 28 days. Moreover, the experimented results was graphically analyzed and correlated for better understanding