Pengaruh Penambahan Admixture Terhadap Kuat Tekan Beton Dari Berbagai Merek Semen

Tonasa cement, Bosowa cement, and Tiga Roda cement havediffenrence characteristic from procedure to produce andcomposition of ingredients, the difference are probably reach thediffenrence respond or effected from three brands are mixed fromadmixture to be a mix concrete. One of the commonly admixture andeasy to find is Damdex Brand that can increase the strengthness ofthe concrete. The aimed of this investigation to analyse the effect ofadmixture (Damdex) variation toward concrete compressive strengthby comparison the cement brands.The methodology of thisinvestigation is experiment method or material test in laboratory.The concrete compressive strength will calculated during 28 daysage, after giving an admixture (0%,1%, 1,5%,2%, 2,5% dan 3%) withdifferent brands cement variation,but composition of Concrete suchAgregat and Water are same from each treatment. The sample fromeach treatment totally 3 tested samples. The result of thisinvestigation, Tonasa cement is increase with concrete compressivestrength from highest of admixture (Damdex) from admixture level is2% which gain compressive strength 385,24 Kg/cm2 or increasingamount 23,52% from normal concrete compressive strength.Bosowa brand is increase with concrete compressive strength fromthe highest admixture ( Damdex) the level is 2.5 % with compressivestrength gain is 338,00 Kg/cm2 or increase amount 10,15% fromNormal concrete compressive strength.Compressive strength ofTiga Roda brand also gain increase from admixture with highestlevel is 3% which 354,35 Kg/cm2 compressive or increase amount18,60% from normal concrete compressive strength