What is the maximum allowable amount of fibers in plaster mixtures per cubic foot of cementitious material to avoid mixing problems?

The maximum allowable amount of fibers in plaster mixtures is set at 2 pounds per cubic foot of cementitious material to prevent mixing problems. This guideline is crucial in maintaining the quality and workability of the plaster mix.

When the fiber content exceeds this limit, there’s a risk of causing clumping or uneven distribution within the mix, which can lead to inconsistent texture and poor adhesion on the pool surfaces. Additionally, too many fibers can impair the curing process and overall performance of the plaster, potentially resulting in surface defects or reduced durability.

Keeping the fiber content at or below this specified amount ensures that the plaster maintains the necessary structural integrity and performance characteristics required for commercial pool applications. This consideration is critical for contractors aiming to produce high-quality finishes that will endure the challenges posed by water exposure and environmental conditions.