Building Materials
Division (BMD)
Research
Work Handed by BMD
 Establishment
of Bull’s trench kiln technology
(for burnt clay brick production)
National Building Research
Organisation with the technical assistance of the Central Building
Research Institute, India had involved in the establishment of a
brick manufacturing unit At Dankotuwa, Sri Lanka under the aegis
of the Building Materials Manufacturing Corporation. Thereby, a
new technology of manufacture had been introduced to ensure
manufacture of clay bricks of correct size and shape having
adequate strength to construct four storey buildings in load
bearing brick work.
Establishment
Brick production unit for “Sthupa” Conservation
for Central Cultural Fund, Sri Lanka using the above technology
of brick manufactures.
Solar
Timber Seasoning Kiln
Kiln seasoning of
timber generally improves mechanical strength, durability and
reduces movements due to ingress of moisture. Kiln seasoning of
timber is far superior and quicker than natural air seasoning
methods in use.
The project was
initiated due to the prevailing shortage of primary timber species,
and anticipating a future usage of secondary timber species in the
construction industry. The project was funded by the UNDP and
executed by UNCHS with the assistance of the Asian Institute of
Technology, Thailand. The moisture content can be brought down to
about 12 per cent or less within a short time of about two weeks by
kiln seasoning, Solar energy provides an economical means of
seasoning timber.
Commissioning
of Rice Husk based cement production facility
(Suduwathura-ara,
Moneragala)
The objective of this production facility was to produce
blended cement and utilize these cements for application such as
masonry mortar, plastering and rendering work etc. in order to
upgrade the existing houses as well as in new constructions in the
village.
When rice husk is
burnt, the resulting ash has a good binding action in conjunction
with hydrated lime in the presence of water. Pozzolanic activity of
rice husk ash can be utilized to produce blended cements by
integrating or blending with Portland cement clinker of OPC in
definite proportions. The resulting Portland pozzolanic cements have
a range of properties according to the degree of activity of ash,
the proportions used and the method of processing employed.
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