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Why can too little water make concrete difficult to pour and spread?
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Cement
The cement-making process, from crushing and grinding of raw materials, through roasting of the ground and mixed ingredients, to final cooling and storing of the finished product.
In the context of concrete, water is essential for creating a workable mixture. To be poured and spread effectively, the concrete must contain enough water to ensure that each aggregate particle is completely surrounded by the cement paste and that all spaces between the aggregate are properly filled.1
When there is too little water, the mixture lacks the necessary fluidity to flow into forms or be spread evenly. While a lower water-to-cement ratio generally results in stronger concrete, the mix must maintain sufficient liquid content to achieve the consistency required for proper placement and structural integrity.1