Source: https://www.devalt.org/newsletter/sep19/lead.htm
Figure 3: Taisei Soil System
RECOMMENDATIONS FOR BOTTOM ASH
USAGE IN MALAYSIA
A detailed physical and chemical analysis of BA
would enable the material to be better understood
and widen its applications in various industries
in the country. Among the potential mass BA
applications are: -
● As a component in the production of cement
since the BA material is rich in silica, iron
oxide, calcium oxide and alumina.
● In the production of bricks, ready-mixed
concrete products or factory-fresh mortars.
BA is non-flammable and safe for use as a
building material.
● Applied in numerous road works such as
in landfills, backfills, soil improvements,
trench fillings and base setting. BA can be
delivered loose or in bags depending on the
storage capacity on site while reducing the
storage, space and logistics issue.
● Applications in gardens and lawns
should be encouraged as a soil additive
to improve the crumb structure of soil,
enhance the compost and horticulture
of the soil. BA could be used without any
additional process or sorting because it
does not contain any germinal seeds and
regenerative plant parts. It has a potential
application in horticulture as an alternative
substrate when mixed with coir dust.
● As it is an open-pored mineral, it has good
water storage capacity and reduces the
drying of the vegetation and enhances
the growth. BA has good environmental
properties with trace element quantities
similar to natural soil.
● The presence of calcium in BA increases
the electrical conductivity of the substrate,
improves soil texture, cation exchange
capacity (CEC), drainage conditions,
organic matter level, salinity, and subsoil
characteristics.
● BA has a high content of aluminium and
calcium oxides, which is suitable for
wastewater treatment application as a
coagulant and flocculants.
67