<![CDATA[The aim of this research is to investigate the effect of using two kinds(brand) cement namely Gresik and Padang cement in one concrete mix with respectto concrete compressive strength. This research is conducted at Concrete ConstructionLaboratory of Engineering Faculty, Udayana University. The concrete wasmixed with a ratio 1:2:3 of cement:sand:gravel, batched by volume. Five differentconcrete mixes were made to determine their compressive strength. The first mixused Gresik cement, the 2nd mix used Padang cement, the 3rd used a mixture of Gresikand Padang cement batched by volume 1:3, the 4th mix used a mixture of Gresikand Padang cement batched by volume 1:1, and the 5th mix used a mixture of Gresikand Padang cement batched by volume 3:1The test results show that the concrete compressive strength, ’bk , of the 1st, 2nd, 3rd,4th, and the 5th mixture was 209,85 kg/cm2, 184,12 kg/cm2, 185,18 kg/cm2, 191,99kg/cm2, and 202,10 kg/cm2 respectively.]]>
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