The aggregate crushing value in accordance with IS 2386 Part IV, 1963, shall not exceed _____ for concrete for wearing surfaces such as runways, roads and pavements.

Explanation:

According to IS 2386 (Part IV) – 1963, the Aggregate Crushing Value (ACV) test is used to determine the strength of coarse aggregates.

Significance of ACV:

1. The ACV gives a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load.

2. Lower ACV indicates stronger aggregates, which are more suitable for high-strength concrete.

Permissible Limits (as per IS 2386 Part IV):

1. For concrete used in wearing surfaces (e.g., runways, roads, pavements):

   Maximum ACV = 30%

2. For other concrete works (not subjected to heavy wear):

   Maximum ACV = 45%

 Additional InformationAggregate Crushing Value (ACV) Test

1. The ACV test measures the resistance of coarse aggregates to crushing under gradually applied compressive load.
2. It helps determine the mechanical strength of aggregates and their suitability for various concrete applications.