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Bentonite for construction
- 1. 7th Floor, Block2, Worldwide Business Centre, Jalan Tinju 13/50, 40675 Shah Alam, Selangor Darul Ehsan Malaysia. H/P: +6012-2131797 (Sharian Raj) E:sharianraj@nvs99.com Bentonite For Foundation Construction The action of bentonite was first exploited by the oil industry for drilling and stabilizing wells after the use of casing. Delta 500 & 700 bentonite is used automatically to aid diaphragm wall placing, pile driving, caisson sinking, and soil grouting. In addition to advance construction, bentonite avoids the noise and vibration problems that influence conventional foundation operations in urban areas. Bentonite is like portland cement, it must be stored under reasonably dry conditions. It’s a very fine colloidal clay. In foundation work the gel penetrates around individual soil particles and keep them in position by adhesion. Quality of bentonite needed for slurry of the water varies from about 4 percent by weight for use in stiff clays to about 10 percent by weight for open gravels. The preferred arrangement to incorporate bentonite is by high- speed stirrer for at least two minutes. Bentonite Piling Piling. I) Bentonite slurries are used to prevent soil collapse during both the Construction of bored site- cast piles and pre-boring for driven piles. ii) Facilitate driving of pre cast piles used for driven site-cast piles. Bentonite Caisson sinking Caisson sinking. Monoliths can be sunk into place quickly and easily if the cavity between the cast concrete and the excavation is filled with a bentonite slurry. Bentonite Grouting Grouting. It is used to seal soils against water seepage and to increase the bearing capacity of a soil. Bentonite Diaphragm walls Diaphragm walls. i) Involve excavation while keeping trench full of bentonite slurry to prevent caving in. ii) Affect neither the strength of the concrete with reinforcing steel under normal works.