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The present work introduces composite manufactured from grounded rice straw via addition urea-formaldehyde "UF" resin as a binding material. The different percentages of commercial urea-formaldehyde resin were used by weight as binder in manufacturing of the composite. The expansion percentage "E" (%), bulk density "Bd" (kg/m 3 ) and thermal conductivity "k" (W/m. o C) of the manufactured composite affected by different content of binding material "Bm" UF resin (0, 20, 30, 40 and 50%), different formation pressure "FP" of (5.7, 12.4 and 18.5 MPa) and elapsed time (days) after releasing formation pressure. The results showed that expansion percentage "E" (%) increased with increasing of formation pressure "FP" and elapsed time (days) at different binding material "Bm" (%). The bulk density "Bd" (kg/m 3 ) was higher at binding material percentages "Bm" of 50 % under formation pressures of 18.5 MPa, after 0, 7 and 14 days. The bulk density “Bd” (kg/m 3 ) was lower at binding material percentages "Bm" of 0 % (control) under formation pressures of 5.7 MPa, after 0, 7 and 14 days. The thermal conductivity "k"(W/m. o C) decreased with increasing formation pressure "FP" and binding material percentage.

POSSIBILITY OF USING COMPRESSED RICE STRAW AS AN INSULATION MATERIAL