International Rainwater Cistern Systems Conference
Khon Kaen, Thailand
- January, 1987
Section E: Technology
A Low Cost Rainwater Tank
Facility of Engineering
Khon Kaen University
A low cost cylindrical rainwater tank was developed for 6
and 12 cu.m. tanks. The height and diameter of 6 cu.m. tank are both 2.0 m.
while those of 12 cu.m, tank are 2.5 m. The tank's wall is made by plastering
mortar onto a mould coated with clay. The wall is reinforced with steel wire.
The technique renders it possible to make a thin wall, i.e. 50 and 60 mm. thick
for 6 and -12 cu.m. tanks respectively. The roof of the tank is made of steel
reinforced concrete. Cost comparison revealed that the cost of material for
this tank is the lowest. The material costs for 6 and 12 cu.m. tanks are
approximately 1,500 and 2,800 baht (US$ 60-110). Performance tests indicated
that this tank design is sufficiently strong and the construction technique is
Several wire reinforced mortar tanks were built in Khon Kaen
and Ubonratchatani and they are found to perform very well. This wire
reinforced mortar tank is now being used for the rainwater tank program in
Ubonratchatani and for the Rotary Club's Clean Water Project which will be
inaugurated to pay homage and express loyalty to His Majesty the King in the
celebration of his sixtieth birthday.
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