What is sand sieve analysis?
Sieve Analysis Test of Sand is done to check the gradation of sand particles. Sand particle distribution in sand volume is important for good quality concrete and mortar. In this test, the sand sample is passed through a series of IS sieve sizes ordered from bigger to smaller sizes at the bottom.
What does AFS stand for sand?
A standard parameter to express the size of molding sands is the AFS fineness number (AFS = American Foundry Society). This number is calculated from the size distribution, which is determined by standard ASTM sieves.
Which sand is used in foundry?
silica sand
Foundry sand consists primarily of clean, uniformly sized, high-quality silica sand or lake sand that is bonded to form molds for ferrous (iron and steel) and nonferrous (copper, aluminum, brass) metal castings.
What are the common tests performed on foundry sand?
The basic tests measure the following parameters: wet tensile strength, cone jolt, mouldability, friability, moisture content, permeability, green compression strength, compactibility, loss on ignition, volatiles content, grain size & distribution, dust (dead clay) content, and active clay content, impact strength .
How do you interpret the sieve analysis?
When you hear the term test sieve analysis results, it is referring to the distribution of particles in a given sample. This can be interpreted by analyzing the retention of particles throughout a sieve stack or the amount of material that passes through each sieve.
What is grain fineness number?
The Grain Fineness Number (GFN) is the quantitative indication of the grain size distribution of the sand Sample by carrying out sand sieve analysis. The current manuscript aims to determine the value of GFN of various river sands.
How is the grain fineness number calculated?
AFS fineness number which is the standard for reporting the grain size and distribution of sand was used to assess the particles [11]. This was applied to the sieve result as in Table 6 to obtain the AFS number. From the table, grain fineness=total product\% sand substance = 3241\100=32.4. …
How is foundry sand used?
Beneficial Uses for Spent Foundry Sands EPA supports the use of silica-based spent foundry sands from these foundry types in the following applications: As an ingredient in manufactured soil; As an ingredient in soil-less media (potting soil); and. As a foundation layer of roads (subbase).
Why sand is used in foundry?
Sand casting is one of the few available processes for metals with high melting temperatures such as steels, nickel, and titanium. Because of its flexibility, heat resistance, and relatively low cost, sand casting is the most widely used casting process. Castings are produced by pouring liquid metal into a mold cavity.
How do you test for refractoriness of sand?
The refractoriness of the molding sand is judged by heating the American Foundry Society (A.F.S) standard sand specimen to very high temperatures ranges depending upon the type of sand.
What is foundry and forging?
Forging is a manufacturing process involving the shaping of metal using localized compressive forces. The blows are delivered with a hammer (often a power hammer) or a die. Foundry. A foundry is a factory that produces metal castings.