Agricultural Research Corporation (ARC) - Sudan
Proceedings of the Meetings of the National Crop Husbandry Committee - NCHC
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Effect of some Physical and Chemical Treatments on Mechanical and Physical Properties of Acacia nilotica Wood-cement Mixture
Tarig T. Hassan , Abd Alaziem Y. Abd Algadir , Abd Elatief A.
Mohamoud and Atef M. A. Alhedy
Abstract:
The study investigated the effect of some factors on the properties of
Acacia nilotica (sunt) wood-cement mixture. Wood slabs were obtained
from 30 sunt trees in Abu kuk Forest. Portland cement was used. The
experiment was carried out to study the effect of cold water extraction
for (0, 7 and 14 days) in addition to six levels of calcium chloride (1,
1.5, 2, 2.5, 3 and 3.5 %, based on cement weight) on the properties of
the wood-cement mixture. In total, 72 specimen blocks (5*10*60cm3) were
prepared using metal molds. Although the effect of extraction duration
on the mechanical properties and water absorption was dependent on the
level of calcium chloride, extracted wood had significantly higher
strength and lower water absorption than non-extracted wood; there is no
need for extraction more than 7-days. No significant differences in 2
hours water absorption and swelling were found between the six levels of
calcium chloride when using non-extracted wood (control), increasing the
level of calcium chloride in the mixture was associated with a decrease
in strength properties and an increase in water absorption. When the
wood was extracted, increasing the level of calcium chloride was
associated with an increasing trend in the strength properties and a
decrease 2-hours water absorption; the level at which the strength
properties start to increase varied among properties and extraction
levels.
Proceedings of the Meetings of the National Crop Husbandry Committee 40th (2005) pp. 245-253
Proceedings of the Meetings of the National Crop Husbandry Committee - Sudan
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