Experimental study on the effect of aggregates in concrete properties: Influence of washing aggregates when the content in fly ash varies
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AuthorCorral Crespo, Lidia
lt is widely known that aggregates have a great influence on fresh and hardened concrete properties. lt is very important to wash the aggregates before their use in order to remove the layer of fine powder covering them that may affect the bond between the cement and the aggregates. The present research was focused in determining how important is to wash the aggregates before using them to make concrete when the amount of fly ash used in the mix is changed.
A serie of tests have been carried out and from the experimental data it has been concluded that the concrete made with unwashed aggregates has better hardened properties (compressive and tensile strength, and static and dynamic modulus of elasticity) than the concrete made with washed aggregates.