Red Seal Bricklayer Practice Exam

How is the mortar mix ratio for standard use typically expressed?

1. 1 part cement, 2 parts lime, and 4 parts sand

2. 1 part cement, 1 part lime, and 6 parts sand

3. 2 parts cement, 1 part lime, and 5 parts sand

4. 1 part cement, 1 part sand, and 1 part lime

The correct answer is: 1 part cement, 1 part lime, and 6 parts sand

The mortar mix ratio for standard use is typically expressed as a combination of cement, lime, and sand, focusing on achieving the right balance for strength, workability, and durability. The correct answer includes a mix of 1 part cement, 1 part lime, and 6 parts sand, which provides an optimal blend for common masonry applications. In this mix, the cement acts as the primary binder, the lime improves flexibility and workability, and the sand provides bulk and helps to prevent shrinkage. This specific ratio is known to provide sufficient strength for walls and structures while allowing for ease of application. The inclusion of lime works to enhance the mortar's ability to expand and contract with temperature changes, which is crucial for structural integrity over time. Each component in this ratio plays a vital role in achieving a high-quality mortar that can withstand typical stresses in construction, making it a widely accepted standard in the bricklaying industry.