Faculty of Engineering

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Browsing Faculty of Engineering by Subject "absorption"

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    PEMANFAATAN ABU DASAR (BOTTOM ASH) SEBAGAI BAHAN SUBSTITUSI PASIR PADA BETON MUTU NORMAL
    (2013-07-23) Pradita, Surya; Kurniawandy Alex; Djauhari Zulfikar
    This research determines the optimal composition of bottom ash waste replacement of sand that can be used in normal quality concrete (K-100, K-175 and K-250) and assess the influence of bottom ash waste to the compressive strength, absorption, porosity, and shrinkage of concrete. Percentage of waste bottom ash is used by 0%, 10%, 20%, and 30% of the weight of the sand.The results showed that the use of bottom ash to the compressive strength testing of concrete quality on all three types of plans tend to be lower when the compressive strength of concrete. Decline increases with the addition of bottom ash in concrete mixtures. However, the resulting compressive strength on all variations of the use of bottom ash still meet the standards of the planned concrete strength. Based on test results obtained composition compressive strength concrete mix with the optimum use of bottom ash is 30% on each of the quality of concrete plans. The use of bottom ash in concrete mixtures tend to increase the absorption and porosity of the concrete, but the concrete shrinkage decreases.
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    PEMANFAATAN ABU TERBANG (FLY ASH) SEBAGAI BAHAN SUBSTITUSI SEMEN PADA BETON MUTU NORMAL
    (2013-07-27) Kusuma, Ilham Jaya
    This study aims to determine the optimum levels of fly ash to cement that can be used in normal quality concrete (f’c 10, f’c 17.5, f’c 25) and study the effect of fly ash on compressive strength test, absorption, porosity, and shrinkage of concrete. Percentage of fly ash used each with a variation of 0%, 10%, 20%, and 30% by weight of cement. The results showed that the use of fly ash on compressive strength testing of concrete quality on all three types of plans tend to decrease the compressive strength of concrete. Decrease in compressive strength increases with the addition of fly ash in the concrete mix. Based on test results obtained composition compressive strength concrete mix with the optimum use of fly ash is 30% on each of the quality of concrete plans. The use of fly ash in concrete mixtures tend to increase absorption, porosity, and shrinkage of concrete.