The paper deals with the influence of additives on the progress of shrinkage and mass losses in self-compacting concrete.Limestone and fly ash at varying amounts were used as an additive in the production of four types of self-compacting concrete.Volume changes were observed from an early stage of setting(the measurement was commenced within 1 hour of mixing)using shrinkage drains with a moveable wall, followed by a long-term manual measurement using an external strain gauge.For the first 48 hours the volume-change measurement was continuous, and for the next few months it was performed manually.Mass losses were determined simultaneously with shrinkage-during the first 48 hours by weighing on a special weighing table capable of continuous recording, and manually afterwards.
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