Browsing by Author "Olivia Monita"

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    PEMANFAATAN ABU KULIT KERANG (ANADARA GRANDIS) UNTUK PEMBUATAN EKOSEMEN
    (2013-02-09) Syafpoetri, Nelvia Adi; Olivia Monita; Darmayanti Lita
    This research aim was to made ecocement using ash shells as the main raw material. Ash shells derived from waste shells of sea shells (Anadara grandis) and were burnt at the temperature of 7000C. The contain of calcium oxide (CaO) was 55,10% expected to replace lime as the main raw material in the manufacture of cement. In this research, ecocement were made with variations A 100% ash shells and variations B 50% ash shells : 50% lime. The main raw material is mixed with other ecocement ingredients (SiO2, Al2O3, Fe2O3, and MgO) and burnt at a temperature of 14000C to obtain clinker. Further, clinker was added with gypsum to produced ecocement. The results of chemical characteristics of ecocement A were insoluble : 0,36%, SiO2 : 20,26%, Fe3O2 : 3,46%, Al2O3 : 6,42%, CaO : 63,16%, MgO : 1,67%, SO3 : 2,76%, lost incandescent : 1,82%, alkali 0,56%, free lime : 1,22%, C3S : 42,20%, C2S : 26,20%, C3A : 11,20%, and C4AF : 10,52%. In ecocement B were insoluble : 0.67%, SiO2 : 21,09%, Fe3O2 : 3,63%, Al2O3 : 5.96%, CaO : 63,25%, MgO : 2,05%, SO3 : 2,77%, lost incandescent : 1,31%, alkali 0,50%, free lime : 1,30%, C3S : 38,80%, C2S : 31,20%, C3A : 9,70%, and C4AF : 11,0%. The results of testing the chemical characteristics of the two ecocement were appropriate with SNI 15-2049-2004. The results of compressive strength testing of mortar at 28 days showed that sample A had 171 kg/cm2 and sample B had 196 kg/cm2. The results of testing the physical characteristics of the two ecocement were not yet appropriate with SNI 15-2049-2004.
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    PEMANFAATAN ABU SAWIT SEBAGAI BINDER PADA SELF- COMPACTING CONCRETE (SCC)
    (2013-07-04) Harahap, Mei Eftarika; Olivia Monita; Kurniawandy Alex
    This study analyse the workability and compressive strength of Self-Compacting Concrete (SCC) by using palm oil ash as mineral admixture for binder. Workability examined was flowability, fillingability, and passingability using a Slump Cone, V-Funnel and L-Box. Palm oil ash added in the mixture was 5%, 10%, 15%, and 20% from weight of the binder. Research showed the flowability and fillingability of SCC decreased with addition of palm oil ash in the mixture. Passingability increased with percentage of ash addition in the mixture. The optimum of flowability using T50 and slump flow was obtained at mixture with using 10% addition of palm oil ash. While the optimum flowability was determined for mixture with 5% ash using V-Funnel. Passing ratio of all mixtures was in the range from EFNARC, 2002. The maximum compressive strength of SCC was 34.82 MPa at 28 days concrete age for mixture using palm oil ash of 10%.