Answer / pranjal

PQC stands for Pavement Quality Concrete. Its min thickness
can be kept as 200mm and grade is M30 to M40.
Used at structures such as Toll Plaza etc.

Answer / Rashmi Chaudhary

In civil engineering, the minimum requirements for concrete (PQC) can vary depending on the specific application and local building codes. However, here are some general guidelines:
1. Minimum Thickness: For slabs and beams, the minimum thickness is usually around 50mm. However, this can change depending on factors such as load-bearing capacity and span.
2. Minimum Grade: The grade of concrete represents its strength. Common grades in India are M10 (10 N/mm^2), M15 (15 N/mm^2), M20 (20 N/mm^2), M25 (25 N/mm^2), and so on, where N/mm^2 is the compressive strength after 28 days. The grade used depends on the intended application.
3. Age of PQC: Fresh concrete should be placed within 1 hour of mixing for optimal results. However, this can vary depending on factors such as temperature and humidity.

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