The natural river sand was the cheapest resources of sand. However the excessive mining of river bed to meet the increasing demand for sand in construction industry has lead to the ecological imbalance in the state. Now the sand available in the riverbed is very coarse and contains very high percentage of silt and clay. The silt and the clay presence in the sand reduce the strength of the concrete and holds dampness. The natural river sand is the product of sedimentation. mica, coal, fossils and other organic impurities are present in the river sand above certain percentage which make the sand useless for concrete work. Acute shortage and high price for river sand has lead to the adulteration of sand with salty sea sand which has raised serious concern among builders.
The superior shape, proper gradation of fines, smooth surface texture and consistency in production parameter of chemically stable sands provide greater durability and higher strength to concrete by overcoming the deficiencies like segregation, bleeding, honey combing, voids and capillary.
The crusher dust is flaky and angular in shape which is troublesome in working. There is no plasticity in the mortar which makes yet difficult for the mason to work. Where as the cubical shape with grounded edge and superior gradation gives good plasticity to mortar providing excellent workability.
Advantages of V Sand
It is well graded in the required proportion.
It does not contain organic and soluble compound that affects the setting time and properties of cement, thus the required strength of concrete can be maintained.
It does not have the presence of impurities such as clay, dust and silt coatings, increase water requirement as in the case of river sand which impair bond between cement paste and aggregate. Thus, increased quality and durability of concrete.
V-Sand is obtained from specific hard rock (granite) using the state-of-the-art International technology, thus the required property of sand is obtained.
V-Sand is cubical in shape and is manufactured using technology like High Carbon steel hit rock and then ROCK ON ROCK process which is synonymous to that of natural process undergoing in river sand information.
Modern and imported machines are used to produce V-Sand to ensure required grading zone for the sand.Vasthu Shastra Says Building material must be free from traces of human body or animal. V-sand is free of such material and is produced by crushing hard granite stone when compared to river sand that is produced naturally from weathered rock.
Comparison between V Sand and Crusher Dust
|No.||V Sand||Crusher Dust|
|1: Shape||Cubically Shaped||No shape|
|2: Quality||Best Quality With Italian Technology||Poor quality|
|3: Product||Manufactured as per international standards||Last Product in Production Process with no standards|
|4: Grade||IS 383 (1970)Zone-II (Govt.College of Engineering, Parassinikadav, Kannur)||No gradation|
|5: Suitable for concreting||Recommended for concrete & masonry works.||Not recommended for concrete or masonry works. Does not have quality.|
Sieve Analysis River Sand Vs V Sand
|IS SIEVE||RIVER SAND % Age Passing||V-SAND % Age Passing||% Age passing for single sized aggregates of Normal Sand (IS383 - 1970) Zone II|
|4.75 mm||99.25||99.80||90 to 100|
|2.36 mm||93.50||91.80||75 to 100|
|1.18 mm||48.00||63.00||55 to 90|
|600 Microns||21.00||42.20||35 to 59|
|300 Microns||04.00||29.80||08 to 30|
|150 Microns||0.05||11.40||to 20|