PENGARUH KONDISI MATERIAL DENGAN AKTIVATOR POTASSIUM PADA BETON GEOPOLYMER DARI LIMBAH B3 FLY ASH BATUBARA TERHADAP KUAT TEKAN

Abstract

Generally, concrete is known as material that is composed by the main composition of coarse aggregate, fine aggregate, water and cement. Since the diminishing supply of cement, various studies have been conducted to find  environmentally  friendly  materials  as  a  substitute  for  cement.  This  study  discusses  fly  ash-based geopolymer  concrete,  the result of coal burning at Bukit Asam Tanjung Enim PLTU, South Sumatra with potassium  activator.  This  research  was conducted  to know  the effect of pottasium  activator  and  material conditions,  to the compressive  strength of the 30 Mpa plan in geopolymer  concrete  through testing in the laboratory of the Civil Engineering Faculty of Bina Darma University of Palembang by making 18 cylindrical test specimens with diameter 100 mm x 200 mm, with fly ash and Pottasium activators . Test specimens were made using aggregate material conditions in Saturated Surface Dry (SSD) and oven dry at 60° C with 1 hour, with the treatment  of cylindrical  objects  with room temperature  until the time the test specimens  will be tested.

This  research  product  is a behavioral  graph  relationship  of SSD  and  oven  dry conditions  on gopolymer concrete material in receiving compressive load with the Pottasium activator.

From this graph it can be seen that, with the condition oven dry material the fly ash and activator pottasium, it

is stronger in accepting compressive loads with a compressive strength value of fc 30 Mpa.