Influence of Palm Oil Fuel Ash and W/B Ratios on Compressive Strength, Water Permeability, and Chloride Resistance of Concrete

Table 4

Compressive strengths and water permeability coefficients of the types of concrete at 28 and 90 days.

Mix	Compressive strength (MPa)-normalized  (%)		Water permeability   ×  10^−13,   (m/s) –k/k control
	28 days	90 days	28 days	90 days
40CT	50.2-(100)	55.9-(100)	3.01-1.00	1.96-1.00
40P15	46.2-(92)	52.8-(94)	2.26-0.75	1.08-0.53
40P25	43.3-(86)	50.9-(91)	3.33-1.11	2.04-1.04
40P35	40.0-(80)	45.8-(82)	4.52-1.50	2.86-1.46
50CT	39.6-(100)	41.9-(100)	4.81-1.00	3.20-1.00
50P15	36.4-(92)	39.5-(94)	5.06-1.05	2.91-0.91
50P25	34.6-(88)	35.5-(85)	6.67-1.39	3.86-1.21
50P35	31.7-(80)	33.9-(81)	7.03-1.46	4.51-1.41