What is C33 aggregate?

According to ASTM C33 coarse aggregate consists of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, crushed hydraulic-cement concrete, or a combination. The use of crushed hydraulic-cement concrete may require some additional precautions.

What is grading zone of sand?

It divides the sand in four zones i.e. from Zone I to Zone IV. Zone I–Sand being very coarse and Zone 4 sand is very fine. It is generally recommended by code to use sands of zones I to Zone III for Structural concrete works.

What are the types of gradation?

Gradation Types (see Graph)

• Dense or well-graded. Refers to a gradation that is near the FHWA’s 0.45 power curve for maximum density.
• Gap graded. Refers to a gradation that contains only a small percentage of aggregate particles in the mid-size range.
• Open graded.
• Uniformly graded.

Is 383 a sand grading?

Grading limits of Manufactured Sand fell within the grading Zone-II of fine aggregates as specified in IS 383. The Shape of the Manufactured Sand particles resembled the shape of river sand particles. Bulk density and specific gravity of Manufactured Sand were comparable to those of river sand.

What are the two types of gradation?

there are two main gradation types categorised by aggregate morphology, namely continuous gradation and gap gradation, or three types by air voids, namely dense gradation, open gra- dation and semi-open gradation.

What should the particle size of coarse sand be?

The Coarse Sand Media Specification’s effective particle size (D10) should range from 0.3-0.5 mm along with a uniformity coefficient less than 4.

What are the characteristics of coarse sand media?

Media with small grain size slow the water movement and increase the chance of clogging. 10) and uniformity coefficient (Uc) are the principal characteristics of granular media treatment systems. The ideal sand media for intermittent sand filters is a coarse sand with an effective size between 0.3 mm and 0.5 mm.

What should the ES be for a sand filter?

These allowances create concerns for using this same material as a treatment media in a sand media filter. 3) The recommended coarse sand media specification for an intermittent sand filter has an ES (D. 10) of 0.3 to 0.5 mm with a uniformity coefficient (Uc) of <4 with no more than 4% passing a 100 sieve.