Effects of Low Volume Fraction of Polyvinyl Alcohol Fibers on the Mechanical Properties of Oil Palm Shell Lightweight Concrete

Table 5

Development of compressive strength of lightweight OPS FRC under continuous moist curing.

Mix code	Compressive strength (MPa)^a
	1 d	3 d	7 d	28 d	90 d
V0	29.32 (68%)	33.04 (77%)	39.48 (92%)	42.89	43.29 (101%)
	(0.61)	(0.33)	(0.48)	(0.49)	(0.67)
V0.125	28.81 (67%)	32.61 (75%)	39.70 (91%)	43.29	43.54 (101%)
	(0.83)	(0.97)	(0.62)	(0.73)	(0.89)
V0.250	28.95 (64%)	34.60 (76%)	39.92 (88%)	45.56	46.77 (103%)
	(0.90)	(0.97)	(0.81)	(0.86)	(0.78)
V0.375	29.65 (64%)	35.88 (77%)	41.95 (90%)	46.62	47.60 (102%)
	(0.83)	(0.95)	(0.75)	(0.87)	(0.95)
V0.500	30.66 (63%)	37.58 (77%)	43.75 (90%)	48.51	51.48 (106%)
	(0.88)	(0.80)	(0.81)	(1.22)	(0.66)

The data in parentheses are percentages of 28-day compressive strength.
Note: the standard deviations (in MPa) of the corresponding mechanical properties are shown in the bracket (below).