Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Table 5

Alkali effect on tensile properties of PF.

Fibres	Treatment		Tensile strength (MPa)			References
	Chemical	Physical
Kenaf	NaOH soaked for 24 h	Oven dried at 220°C (10 h)		—	289	[97]
			Untreated	5%	355
			Treated	10%	261
				15%	213
Kenaf	NaOH soaked for 24 h	Oven dried at 80°C (10 h)		—	16.8	[148]
			Untreated	3%	17.5
			Treated	6%	17.6
				9%	16.8
Abaca	NaOH soaked for 0.5 h	Oven dried at 80°C (2 h)		—	755	[146]
			Untreated	5%	847
			Treated	10%	840
				15%	840
Mulberry	NaOH soaked for 0.5 h	Dried at room temperature (48 h)		—	463.84	[149]
			Untreated	5%	605.61
			Treated	10%	532.24
				15%	519.30
Date palm	NaOH soaked for 1 h	Oven dried at 80°C (24 h)		—	350	[150]
			Untreated	2%	370
			Treated	5%	460
				10%	250