IS code for Specification for coarse and fine aggregates from natural sources for concrete?

During radiography test, which region absorbs less radiation and transmits more?

Determine the ___ either from strength considerations or from durability considerations.

In universal testing machine, for a circular section specimen, the gauge length is taken to be _________

IS code for Specification for ordinary Portland cement, 33 grade?

IS Code of practice for plain and reinforced concrete is ____

__________ water-cement ratio content to give adequate durability for the particular site conditions.

According to IRC:15-2011, Minimum cement content for 4.5 N/mm2 characteristic flexural strength for PPC shall _____