True or False: If concrete loads for a large order are delivered on different days but use the same materials and proportions, there will be no color variations.

True or False: If concrete loads for a large order are delivered on different days but use the same materials and proportions, there will be no color variations.

• A. True
• B. False
• C. Not enough information
• D. It depends on curing

Answer: (B)

Color depends on more than just the mix proportions. Even when you use the same materials, day-to-day differences in moisture of the aggregates, how much water is actually in the mix to achieve the desired workability, ambient temperature and humidity, and how the concrete is cured can all change the final color. For example, damp aggregates can shift the shade, higher or lower water content affects the cement paste visibility, and curing conditions influence how deeply the surface darkens as hydration proceeds. Finishing methods and timing also play a role in the perceived color. Because these factors can vary between days, large orders poured on different days will often show some color variation, even with identical materials and proportions.

Color depends on more than just the mix proportions. Even when you use the same materials, day-to-day differences in moisture of the aggregates, how much water is actually in the mix to achieve the desired workability, ambient temperature and humidity, and how the concrete is cured can all change the final color. For example, damp aggregates can shift the shade, higher or lower water content affects the cement paste visibility, and curing conditions influence how deeply the surface darkens as hydration proceeds. Finishing methods and timing also play a role in the perceived color. Because these factors can vary between days, large orders poured on different days will often show some color variation, even with identical materials and proportions.