Sand type characteristics analysis and mapping in Bengkulu

Abstract

Sand can be classified based on the origin of the quarry, namely sea sand, river sand and mountain sand. Sand provides an important role as filler material in building cementation materials such as in mortar and concrete. The characteristics of the sand determine the strength of the building. Characteristics can be in the form of grain size (gradation), sludge/clay content and specific gravity. This study aims to look at the characteristics of sand from different types of sand while looking at the mapping of sand zones based on SKSNI 03 2834 2000. Sand is taken directly from quarry, in five city districts in Bengkulu Province which consist of sea sand, river sand and mountain sand. Determination of sand gradation is based on SNI 03-1975-1990 sieve analysis test. Examination of sludge/clay content and specific gravity based on SNI 6821-2002 and SNI 03-4804-1998 standards. The conclusion obtained is that sand will have different characteristics based on quarries. 81.25% sea sand tends to have uniform granules, with smooth and very fine characteristics and does not enter any zone. River sand has a good gradation and categorized in zones characteristic of smooth, slightly rough and rough. Mountain sand is categorized as fine sand with good gradation. The sludge content of sand from each type of origin of the sand quarry shows that the river sand with a calm flow has a high level of clay content. Clay content levels that are very high on mountain sand are probably ash that was produced by volcanic activity of the mountain. The specific gravity of each type of sand varies, not depending from the origin of the sand.