STUDI PENAMBAHAN SUPEPRPLASTCIZER PADA KUAT TEAN BETON DENGAN VARIASI FAS 0,4 – 0,5 MENGGUNAKAN AGREGAT KASAR YANG DI PECAH (SPLIT)

Abstract

This study aims to determine the effect of superplasticizer usage on concrete compressivestrenght with variation of water cement ratio using subdivided crude aggregates (split).This research cylindrical test object with diameter 15 cm and height 30 cm. Compressivestrength concrete design fc’ 35 MPa, with variation of water cement ratio W/C 0,4; 0,45; 0,5 andusing Superplasticizer Sikament LN materials 0,5% of the weight of cement and slump value 12 ± 2cm.The result of research showed an increase the value of concrete compressive strength withthe addition of superplasticizer. The average of concrete compressive strength without the addition ofsuperplasticizer and variation of water cement ratio W/C 0,4; 0,45; 0,5 at 28 days in a row is 36,14MPa, 34,73 MPa, 29,82 MPa. While the value of concrete compressive strength with the addition ofsuperplasticizer increase to 39,73 MPa, 37,18 MPa, 31,23 MPa.