KUAT TEKAN, POROSITAS DAN PERMEABILITAS PERVIOUS CONCRETE DENGAN CAMPURAN AGREGRAT LIMBAH GERABAH

Abstract

One of an effort to reduce water runoff and increase infiltration into the soil is environment-based pervious concrete drainage technologies. As amixture of aggregate, the waste of burned clay fraction in the pervious concrete had its own advantages. The waste of burned clay aggregate is goodin a strength, and bigger pores than concrete. This study aims to determine the compressive strength, porosity, permeability recycle of waste ofburned clay ; the relationship between compressive strength and porosity; and the relationship between porosity and permeability of the perviousconcrete with a mixture. This research was in laboratory experimental method. Samples were cylinder pervious concrete with of coarse gravelaggregate with burned clay fraction by 0%, 44.6%, 50.9% and 100%. Each mixture consisted of three test specimens. Specimens of compressivestrength test was cylinder form in 15 cm diameter and 30 cm height, while the specimen test of permeability and porosity test were a cylinder in10 cm diameter and 6.3 cm height. The compressive strength test was conducted in the age of 7, 14, 21, and 28 days, while porosity andpermeability test at 28 days of age concrete. The concrete porosity were tested with VIM (Void in Mix) method, Add permeability with fallingwater permeability test method which were also done in the age of 28 days. Replacement of gravel with the burned clay fraction aggregate hadincreased the porosity and the permeability coefficient of concrete. However this replacement decreased compressive strength. Pervious concretecompressive strength test results generated from the mixing of the aggregate fraction of burned clay waste 0%, 44.6%, 50.9%, and 100% were5,662 MPa; 5,473 MPa; 3,963 MPa; 2,925 Mpa respectively. Pervious concrete porosity test resulted that the average porosity of sample were29.048%, 30.33%, 31.941%, 39.317% for 0%, 44.6%, 50.9%, and 100% of burned clay aggregrat respectively . While their, permeabilityspecimens contained cement as a binding substance were 0758 cm/sec, 0.1203 cm/sec, 0.1343 cm /sec; 0.2487 cm/sec and without cementwere 18.4798 cm/sec; 21.0162 cm/sec; 21.7312 cm/sec; 25.9522 cm/sec. Those data showed that the greater concrete porosity, the greatercoeficienzy permeability consequenty the compressive strength decreased.