This study investigated the effect of some treatments on the compatibility of three lignocellulos... more This study investigated the effect of some treatments on the compatibility of three lignocellulosic materials with cement. The lignocellulosic materials used were sunt (Acacia nilotica) sawdust, bagasse and cotton stalks collected from Es-Suki Sawmill, EL Gunied Sugar Factory and the fields of EL Kamlin governarate, respectively. The treatments were control, addition of 3% CaCl2, hot water extraction, hot water extraction 3%CaCl2, 1%NaOH extraction, and 1%NaOH extraction+3%CaCl2. Two Dewar flasks and a digital thermocouple were used. Hydration characteristics (maximum hydration temperature, time to reach maximum temperature and rise in temperature above ambient) of the lignocellulosic materials with cement were determined for each lignocellulosic material. The most suitable treatment common to all materials was the 1%NaOH extraction +3%CaCl2. The average maximum hydration temperatures attained by this treatment were 63.87 °C for bagasse, 67.87 °C for cotton stalks and 67.9 °C for sunt sawdust. Bagasse was the least responsive material to the treatments used followed by cotton stalks and then sunt sawdust. Extraction with sodium hydroxide (1% solution) was found to be the most effective treatment for the three lignocellulosic materials under investigation.
American-Eurasian Journal of Agricultural and Environmental Science, 2010
... impact. This affirms that removal of high extractives contents of Ceteris paribus had a signi... more ... impact. This affirms that removal of high extractives contents of Ceteris paribus had a significant consequence on Cmax and МОЕ. On the other hand our findings contradictBadran and El-Osta [29] and Al-Mefarrej [30]. The former ...
Abstract Tree pruning wastes from six woody species, namely Acacia salicina, Conocarpus erectus, ... more Abstract Tree pruning wastes from six woody species, namely Acacia salicina, Conocarpus erectus, Ficus altissima , Leucaena glauca , Pithecellobium dulce and Tamarix aphylla , were used to manufacture high-quality wood reinforced cement composites (WRCCs). Hydrations experiments were conducted to screen the compatibility of the selected tree pruning wastes with cement. Additionally, various particle pretreatments and chemical additives were applied to enhance the compatibility of wood with cement. The best treatment for each species was selected and used to manufacture the WRCCs. The panels were produced under specific manufacturing variables and the mechanical properties and dimensional stability of the panels were determined. The results indicated that both board density and wood/cement (W/C) ratio had significant effects on the properties of WRCCs. With few exceptions, a W/C ratio of 1/2 and either 1200 kg m −3 or 1300 kg m −3 produced the optimal strength properties. The tree pruning wastes are suitable for use as raw materials in the manufacturing of WRCCs after pre-treatment of the wood particles with either cold or hot water and with addition 3% of CaCl 2 , Al 2 (SO 4 ) 3 or MgCl 2 . Therefore, these wastes could be used as an alternative wood source for WRCCs.
This study investigated the effect of some treatments on the compatibility of three lignocellulos... more This study investigated the effect of some treatments on the compatibility of three lignocellulosic materials with cement. The lignocellulosic materials used were sunt (Acacia nilotica) sawdust, bagasse and cotton stalks collected from Es-Suki Sawmill, EL Gunied Sugar Factory and the fields of EL Kamlin governarate, respectively. The treatments were control, addition of 3% CaCl2, hot water extraction, hot water extraction 3%CaCl2, 1%NaOH extraction, and 1%NaOH extraction+3%CaCl2. Two Dewar flasks and a digital thermocouple were used. Hydration characteristics (maximum hydration temperature, time to reach maximum temperature and rise in temperature above ambient) of the lignocellulosic materials with cement were determined for each lignocellulosic material. The most suitable treatment common to all materials was the 1%NaOH extraction +3%CaCl2. The average maximum hydration temperatures attained by this treatment were 63.87 °C for bagasse, 67.87 °C for cotton stalks and 67.9 °C for su...
This study investigated the effects of nine different mixtures of three lignocellulosic materials... more This study investigated the effects of nine different mixtures of three lignocellulosic materials and four ratios of cement to lignocellulosic materials (LCM) (2.5:1, 3:1, 3.5:1 and 4:1) on the properties of cement bonded particleboard. The materials were (sunt) Acacia nilotica saw dust, bagasse and cotton stalks. They were collected from different locations in Sudan. Reasonable panel properties were obtained from the three lignocellulosic materials either pure or mixed using different cement/lignocellulosic materials (C/LCM) ratios (3:1, 3.5:1 and 4: 1). The mean values of water absorption percent (WA %) and the thickness swelling percent (TS %) for both the two hours and 24-hours soaking tests, conform favorably to figures reported in previous studies.The highest bending strength (MOR) and modulus of elasticity (MOE) were attained by100% sunt particles with all cement/lignocellulosic materials ratios.
This study investigated the effect of some treatments on the compatibility of three lignocellulos... more This study investigated the effect of some treatments on the compatibility of three lignocellulosic materials with cement. The lignocellulosic materials used were sunt (Acacia nilotica) sawdust, bagasse and cotton stalks collected from Es-Suki Sawmill, EL Gunied Sugar Factory and the fields of EL Kamlin governarate, respectively. The treatments were control, addition of 3% CaCl2, hot water extraction, hot water extraction 3%CaCl2, 1%NaOH extraction, and 1%NaOH extraction+3%CaCl2. Two Dewar flasks and a digital thermocouple were used. Hydration characteristics (maximum hydration temperature, time to reach maximum temperature and rise in temperature above ambient) of the lignocellulosic materials with cement were determined for each lignocellulosic material. The most suitable treatment common to all materials was the 1%NaOH extraction +3%CaCl2. The average maximum hydration temperatures attained by this treatment were 63.87 °C for bagasse, 67.87 °C for cotton stalks and 67.9 °C for sunt sawdust. Bagasse was the least responsive material to the treatments used followed by cotton stalks and then sunt sawdust. Extraction with sodium hydroxide (1% solution) was found to be the most effective treatment for the three lignocellulosic materials under investigation.
American-Eurasian Journal of Agricultural and Environmental Science, 2010
... impact. This affirms that removal of high extractives contents of Ceteris paribus had a signi... more ... impact. This affirms that removal of high extractives contents of Ceteris paribus had a significant consequence on Cmax and МОЕ. On the other hand our findings contradictBadran and El-Osta [29] and Al-Mefarrej [30]. The former ...
Abstract Tree pruning wastes from six woody species, namely Acacia salicina, Conocarpus erectus, ... more Abstract Tree pruning wastes from six woody species, namely Acacia salicina, Conocarpus erectus, Ficus altissima , Leucaena glauca , Pithecellobium dulce and Tamarix aphylla , were used to manufacture high-quality wood reinforced cement composites (WRCCs). Hydrations experiments were conducted to screen the compatibility of the selected tree pruning wastes with cement. Additionally, various particle pretreatments and chemical additives were applied to enhance the compatibility of wood with cement. The best treatment for each species was selected and used to manufacture the WRCCs. The panels were produced under specific manufacturing variables and the mechanical properties and dimensional stability of the panels were determined. The results indicated that both board density and wood/cement (W/C) ratio had significant effects on the properties of WRCCs. With few exceptions, a W/C ratio of 1/2 and either 1200 kg m −3 or 1300 kg m −3 produced the optimal strength properties. The tree pruning wastes are suitable for use as raw materials in the manufacturing of WRCCs after pre-treatment of the wood particles with either cold or hot water and with addition 3% of CaCl 2 , Al 2 (SO 4 ) 3 or MgCl 2 . Therefore, these wastes could be used as an alternative wood source for WRCCs.
This study investigated the effect of some treatments on the compatibility of three lignocellulos... more This study investigated the effect of some treatments on the compatibility of three lignocellulosic materials with cement. The lignocellulosic materials used were sunt (Acacia nilotica) sawdust, bagasse and cotton stalks collected from Es-Suki Sawmill, EL Gunied Sugar Factory and the fields of EL Kamlin governarate, respectively. The treatments were control, addition of 3% CaCl2, hot water extraction, hot water extraction 3%CaCl2, 1%NaOH extraction, and 1%NaOH extraction+3%CaCl2. Two Dewar flasks and a digital thermocouple were used. Hydration characteristics (maximum hydration temperature, time to reach maximum temperature and rise in temperature above ambient) of the lignocellulosic materials with cement were determined for each lignocellulosic material. The most suitable treatment common to all materials was the 1%NaOH extraction +3%CaCl2. The average maximum hydration temperatures attained by this treatment were 63.87 °C for bagasse, 67.87 °C for cotton stalks and 67.9 °C for su...
This study investigated the effects of nine different mixtures of three lignocellulosic materials... more This study investigated the effects of nine different mixtures of three lignocellulosic materials and four ratios of cement to lignocellulosic materials (LCM) (2.5:1, 3:1, 3.5:1 and 4:1) on the properties of cement bonded particleboard. The materials were (sunt) Acacia nilotica saw dust, bagasse and cotton stalks. They were collected from different locations in Sudan. Reasonable panel properties were obtained from the three lignocellulosic materials either pure or mixed using different cement/lignocellulosic materials (C/LCM) ratios (3:1, 3.5:1 and 4: 1). The mean values of water absorption percent (WA %) and the thickness swelling percent (TS %) for both the two hours and 24-hours soaking tests, conform favorably to figures reported in previous studies.The highest bending strength (MOR) and modulus of elasticity (MOE) were attained by100% sunt particles with all cement/lignocellulosic materials ratios.
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Papers by Ramadan A . Nasser