The best sand for building

The sand is a particle of dust is not a good sandy soil can be used in building applications. A good sand usually found on the slopes of the volcano, because of the nature of the volcanic ash deposits can harden when mixed with other constituents of cement. A good feature of the sand is hard, black to gray, no waste in the sand, like the above features can save raw materials are mixed cement used for the installation of brick and plaster.

For this type of river sand (Tus) is more suitable for making concrete. Because the more hard and black, in order to bind strongly, but also mixed with cement mixed with limestone buildings.

According to the Indonesian National Standards (SNI SK â € "S â €" 04 â € "1989 â €" E: 28) stated on
requirement of sand or fine aggregate well as building materials are as follows:


Fine aggregate must consist of grains are sharp and hard with the index
Violence <2.2.

When testing with the eternal nature of a saturated solution of sulphate salts as follows:
if used natriun sufat destroyed up to 12%.
magnesium sulfate is used as the maximum penalty of 10%.
Should not exceed 5% silt and sand, which
mud more than 5% of the sand to wash.
Sand should not be too much mengadung organic ingredients, which should
shown by the experiments of color Abransâ € "Harder with a saturated solution
3% NaOH.
The composition of the grains of sand have fineness modulus between 1.5 to
3.8 and consists of various items.
For concrete with a high degree of durability to alkali reaction sand
must be negative.
Sea sand should not be used as fine aggregate for all quality
concrete, except with the instructions of the government building
be recognized.
16
Smooth Agreagat be used for plastering and species should be applied
eligible spouse sand.
Conditions Sand Gradation Limits

Hole sieve (mm)

Translucent cumulative weight (%)

Hole sieve (mm)	Weight Translucent cumulative (%)
	Zone 1			Zone 2		Zone 3		Zone 4
	Lower		Upper	Lower	Upper	Lower	Upper	Lower		Upper
10	100		100	100	100	100	100	100		100
4.8	90		100	90	100	90	100	95		100
2.4	60		95	75	100	80	100	95		100
1.2	30		70	55	100	75	100	90		100
0.6	15		34	35	59	60	79	80		100
0.3	5	20		8	30	12	40		15	50
0.15	0	10		0	10	0	10		0	15

Description:
Zone 1 = coarse sand
Zone 2 = A little coarse sand
Zone 3 = Sand Smooth
Zone 4 = A little fine sand

Posted in: