THE USE OF RICE STRAW IN THE PRODUCTION OF COMPRESSED STRAW SLABS
THE USE OF RICE STRAW IN THE PRODUCTION OF COMPRESSED STRAW SLABS
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Date
1999-03
Authors
APEH, ABAH JOSEPH
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Abstract
The properties of compressed straw slabs were investigated.
The aim of the study is to determine the physical and mechanical
properties of the compressed straw slabs (CSS) produced using rice
straw. The study consists of extensive literature review of
available relevant literature and laboratory tests. After review of
literature which served as background knowledge, the compressed
straw slabs were produced using two types of binders namely. Gum
Arabic and Cement identified as CSS-1 and CSS-2 and using a
constant mix ratio of 30% straw and 70% binder. An adapted version
of a screw pressing machine was used for pressing the slabs with a
maximum capacity of 0.1344N/mm2. The properties of CSS-1 and CSS-2
considered in the study were density, moisture content (physical
properties) and the mechanical properties considered were
conductivity and bending strength (modulus of rupture). After
curing for 30 days, the slabs were tested for the aforementioned
properties.
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It was found that CSS-1 has an average density of 303.2Kg/m3.
a moisture content of 8.70%, a conductivity of 0.035w/m°C and a
bending strength of 0.33N/mm2. On the other hand. CSS-2 has an
average density of 425.53Kg/m3. a moisture content of 5.26%. a
conductivity of 0.025w/m°C and a bending strength of 0.29N/mm2.
These values conform to those in existing standards (BS 4046,
Parts I & II. 1966 and 1971, BS 1142, Part I, 1971, BS 1811, Part
I, 1971 and F.A.O Standards for Plywood and other Wood Based
Panels: 1963). In this light, both types of slabs are recommended
(after further investigation) for use as insulating material, and
for permanent formwork for reinforced concrete elements.
Description
A THESIS PRESENTED TO THE DEPARTMENT OF BUILDING, FACULTY OF
ENVIRONMENTAL DESIGN. AHMADU BELLO UNIVERSITY. ZARIA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF
MASTER OF SCIENCE. M.Sc. IN CONSTRUCTION TECHNOLOGY.
MARCH, 1999
Keywords
RICE STRAW,, COMPRESSED STRAW,, SLABS.