Water Permeability of concrete mixing palm oil regionalism ash and crushed dust replaced sand using microwave curing

Abstract

This research studied about “Water permeability of concrete mixing palm oil regionalism ash and crushed dust replaced sand using microwave curing by using palm oil regionalism ash which it replaced cement by 30% of all ratio of the using crushed dust replaced sand which are 0, 20, 40, 60, 80 and 100% in order to study the physical properties, the mechanical properties and the water permeability of concrete property by using the microwave curing on level 720 watt for 120 minutes. The study reveals that using the palm oil regionalism ash to replace the cement by 30% and using crushed dust to replace by 40% that it has the density and the highest compressive strength are 2,402.71 kg/m3 and 280.313 kg/cm2 which has been cured for 28 days. The average water permeability of concrete that has been cured for 28 days which is 0 . 0 8 1 x10- 10 m/s. The average water permeability of concrete by using microwave curing on level 720 watt that it was cured for 120 minutes which the lowest value is 6.17x10-10 m/s. So the using palm oil regionalism ash which it replaced cement by 30%and the using crushed dust replaced sand by 40% which its weight of the compressive strength are higher by 1 6 . 8 . If it compared the concrete that it has already designed that it has been cured for 28 days and the average water permeability of concrete by using microwave curing that it was cured for 120 minutes that it was higher than the concrete which has been cured in the normal temperature for 28 days. The result show that the water curing made up the water which it wasted in the hydrate process which it caused of the hydration reaction that this reaction need to use the water mainly. The effect of the microwave curing may have the insufficiency hydration process that it affect to the concrete that has the dehydration in some area of the concrete that it causes the gaps and the holes in the concrete and then it causes the average water permeability of concrete by using microwave curing is higher than the concrete that has been cured in the normal temperature which are statistically significantly.