Civil Engineering

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Browsing Civil Engineering by Author "Darmayanti Lita"

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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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    PENGISIAN KEKOSONGAN DATA HUJAN DENGAN METODE MULTIPLE NONLINIER STANDARDIZE CORELATION PADA STASIUN HUJAN DAERAH ALIRAN SUNGAI INDRAGIRI DAN ROKAN
    (2013-04-11) Hilwan, Farid; Fauzi Manyuk; Darmayanti Lita
    Missing rainfall data is a common problem in the practice of hydrology. To complete the missing rainfall data, there are several methods that can be used. Application of a method in a particular location is not guaranteed to produce a satisfactory outcome. For this study, the effectiveness of a model at a specific location is necessary. This study examined the effectiveness and behavior for Standardize Nonlinear Multiple Correlation (MNSC) methods in the implementation of the Watershed in Indragiri and Rokan. For this study, 10 years monthly rainfall data was used. Calculation process was done by making several variations of the simulation analysis of data relating to the condition of filling stations. The results of the calculation will be evaluated by using two categories of errors which are absolute errors and the comparison of statistical parameters of the count data from the original data. The results showed the error evaluation value was greater than that required by the method MNSC less than 25%. Behavior of the model indicates that the data length and sequence of the data does not affect the size of the errors that are generated, and there was no guarantee that a high correlation coefficient between the variable filling station and filled a small error value.
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    PENGOLAHAN AIR GAMBUT DENGAN MEDIA FILTER BATU APUNG
    (2013-01-07) Edwardo, Anderson; Darmayanti Lita; Rinaldi
    Peat water is surface water sources are often found in the province of Riau, dark brown to black (124-850 PtCo), high value of organic (138-1560 mg / l KMnO4), and acidic (pH 3.7 to 5.3 ). Conditions of this water showed that the peat water still requires special processing before it can be used as a source of drinking water. One alternative treatment to reduce color of the peat water is the pumice filter. The purpose of this experiment was to study the use of a pumice stone in peat water processing. The principle of this peat water treatment was the process of acclimatization for 6 days in advance to grow biofilms in layer of pumice filters that have been filled with pumice stone and gravel. Once it was done running for 7 samples. In the pumice filter occured adsorption process, filtration process and biological activity by micro-organisms. This experiment used pumice filter reactor, with three variations of the filtration rate was 0.25;1,5;5.0 m/h and thick pumice stone was 60 cm. The best results were obtained in this experiment was the filtration rate 0.25 m / h and 60 cm thick pumice, where optimal efficiency in reducing peat water colors at 94.15%, reduced organic content at 89.78%, increased pH value at 64.58%, and reduced value of turbidity at 98.51%. This result suitable with water standards of PERMENKES No.416 / MENKES /PER/IX/1990, except for the organic content parameters.
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    PENGOLAHAN AIR LIMBAH HOTEL DENGAN METODE FREE SURFACE CONSTRUCTED WETLAND MENGGUNAKAN TUMBUHAN EQUISETUM HYMALE
    (2015-12-11) Ridwan, Mohammad; Darmayanti Lita; Handayani Yohanna Lilis
    Throwing domestic waste water directly to the drainage without treatment had caused the water pollution. The effect of water pollution can disturb the health and water biota. One of simple technology to decrease the pollutant in the water is constructed wetland. This research is aimed to know the effectivity of Free Surface Constructed Wetland with water bamboo (Equisetum Hymale) and peat in processing the hotel waste water. The research used constructed wetland. The quality parameter of water that was tested are pH, COD, TSS. Statistic calculation that was used in this research is one way Anova (Analysis of variance) .The result of the research showed that the constructed wetland with peat and water bamboo (Equisetum Hymale) resulted the highest effeciency in decreasing pH from 8.5 to 6 or 29.41% , COD from 97.7 mg/l to 43 mg/l or 55.98% , and TSS from 447.90 mg/l to 66.00 mg/l or 85.26%. Constructed wetland with the media of peat and without using the plant resulted the highest effeciency in decreasing pH from 8.5 to 6.5 or 23.53% , COD from 250 mg/l to 173 mg/l or 30.8% , and TSS from 447.90 to 79.20 mg/l or 82.32% All result showed that constructed wetland can improve the quality of the waste water.
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    STUDI EVALUASI KINERJA PDAM TIRTA KAMPAR BERDASARKAN KEPUTUSAN MENTERI DALAM NEGERI NO. 47 TAHUN 1999
    (2012-11-24) Hendri; Darmayanti Lita; Fauzi Manyuk
    Result of survey on PDAM Tirta Kampar show that many customers complained of unsatisfactory service. This is due to the performance of taps that are not optimal, so that service to the customer felt also not optimal. This study aimed to find out the problems faced by PDAM Tirta Kampar. Problem analysis is performed to determine the level of success PDAM performance by Kepmendagri No. 47 Year 1999 on Guidelines for Assessment of Regional Water Company. Aspects that affect the performance of taps include: financial, operational and administrative aspects, thus obtained PDAM excellent condition, good, fair, less, and not well. PDAM Tirta performance results shows Kampar success rate simply by weighting the value of >45-60, the value in 2009 was 45.74, and in 2010 was 46.49. Among other causes of low performance is not optimal operational performance, as well as damage to the water meter and the IPA resulted in very big problems of water leakage. For that carried on in an effort to increase the performance of taps as optimizing operational performance and the optimization of human resources. Besides physical action plan efforts through customer water meter replacement, repair IPA, replacement/renewal of piping systems, terameter and providing other support, which is expected to suppress leakage of water so it can improve the performance of the PDAM Tirta Kampar.