Considerations on the effect of moisture content of the mixture on density, water absorption and …

Production and quality control

… compressive strength of pavers It has been known for many years that, on average, cement requires an amount of around 25% of its weight in water for optimal hydration. It happens that, for most applications, this amount of water is not sufficient for curing because, in the mixing and compaction process, the aggregate uses part of this water, meaning that 35 to 50% of the weight of the cement in water needs to be added in order to obtain good mixing and compaction conditions. Since the studies of Duff Abrams more than 90 years ago, it has also been known that when the water/cement ratio in concrete is increased, provided that its consistency is maintained, a decrease in the resistance of the cement paste occurs, and therefore of the concrete.

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