Jurnal Rekayasa
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PENGARUH WAKTU PEMERAMAN TERHADAP DAYA DUKUNG STABILISASI TANAH LEMPUNG BERPASIR MENGGUNAKAN TX-300
Full text linkRoad is one of many things that support the development of construction at citties and villages.
Not every soil can be directly used for road construction. Soil conditions in one area will not have
the same soil properties with the other area. Some has a good bearing capacity and there’s also
some with poor soil bearing capacity. This thing is very influenced by the type of the soil, so that
on constructionis is requred a deeper understanding of the soil behavior analytically.
In this research, the tested soil is study clay soil that diviced from Dusun kali ayu, Desa jadti baru,
Kecamatan tanjung bintang, Kabupaten Lampung Selatan-Provinsi Lampung had been optimized
with TX-300 with density of 2.49, water contents of 22.34 percent, 41.08 percent Liquit Limit,
plastic limit of 31.92 percent and plasticity index of 9.15 percent. Mixed content of TX-300 that
used was 1.2 ml and 6 kg soil sample for 0,7,14 and 28 day with unsoaked method.
On physical examination like density and liquit limit increased after stabilized. While the
mechanical examination, TX-300 is quite effective in increasing the bearing capacity along with
the increasing of curing duration from 21.69% up to 25.92% in 28 days curing time. From CBR
test result without soaking , the soil that has stabilized with TX-300 has a less effect in increasing
the bearing capacity of the sandy clay soil compared with of stabilizing on soft clay soil
OPTIMASI WADUK REGULATING DAM DI KABUPATEN PRINGSEWU, PROVINSI LAMPUNG
Full text linkArgoguruh Weir is the biggest irrigation weir in Lampung Province. This hydraulic structure was
developed in 1935, crossing Way Sekampung River and serving Sekampung Irrigation Area which
is about 67,000 ha. This weir is supplied by water from Batutegi Dam and baseflow of the upper
Way Sekampung basin. Excessive water in Argoguruh Weir is passing by and flowing to the sea.
Due to this condition, the government plan to build a dam between Batutegi Dam and Argoguruh
Weir.
This research aims to carry out a simulation of water balance in the Regulating Dam in order to
find the best operational pattern for the dam. The Objective function of the simulation is water ele-
vation of reservoir with probability more than 80%. The constrain of the simulation is that water
elevation of the reservoir has to be higher than the water elevation of reservoir dead storage that
is +102.30 m. Discharge data used in the simulation is daily discharge data of Argoguruh Weir
from the year 2005 to the year 2013. The simulation is operated in 15-days time basis.
Results of the simulation indicate that the objective function of the simulation is found in elevation
+116.07 m with probability of 80.09%. On that condition, water from the reservoir is utilised for
PDAM Pringsewu water supply and for the water supply for 242.90 ha new irrigation area. The
lowest water elevation in this condition is +111.86 m. This water elevation is much more higher
than the one of reservoir dead storage
Daftar Isi Jurnal Rekayasa Edisi Desember 2015
No full textDaftar Isi Jurnal Rekayasa Edisi Desember 201
STUDI KEBUTUHAN AIR DOMESTIK UNTUK DAERAH PANTAI (STUDI KASUS: KOTA BANDAR LAMPUNG)
Full text linkThis study aims to investigate water domestic demand of people living in coastal area of Bandar
Lampung City. The location of the study is in the Sukaraja area, Bumi Waras Sub-district, Bandar
Lampung City. Data mining of household water demand is undertaken by using questionnaire to
65 households. It is indicated from the survey that every household averagely consits of 4 persons.
Everry person spends about IDR 368 for 103.4 l of water domestic in daily basis. Daily water
domestic demand of the people in the are study is quite different from the standard daily water
domestic demand percapita. This deviation is due to the differences in the aspect of social and
economy between the people in the are study and ordinary peopl
MODEL PERIODIK DAN STOKASTIK DATA PASANG SURUT JAM-JAMAN DARI PELABUHAN PANJANG
Full text linkThe aim of this study are intended to compare periodic and stochastic tide models generated by
using FFT frequencies and astronomic frequencies. The Fourier series are used to simulated peri-
odic model, and the autoregressive method is employed to simulate stochastic model. 253 domi-
nant FFT frequencies and 9 astronomic frequencies are used as constituent frequencies to simulate
periodic models. 512 hours of data are used for the model.
Results of this study present that the periodic and stochastic models using the FFT frequencies
give more accurate results than periodic and stochastic models by using the astronomic frequen -
cies
Sampul muka Jurnal Rekayasa Edisi Desember 2015
No full textSampul muka Jurnal Rekayasa Edisi Desember 201
ANALISIS POTENSI WILAYAH TERKAIT DENGAN KONDISI JARINGAN JALAN DALAM RANGKA PENGEMBANGAN WILAYAH KABUPATEN PRINGSEWU
Full text linkThis research aim to identify and analyze the sectors that are the basis of each district for the de-
velopment of the Subdistrict. Determining and describing the potential competitive sector of each
sub has the greatest potential to contribute to the economic development of Newburn and condi-
tions of the road network that will support the regional development of Fortuna.
Of each District in Newburn shows the different basis, mainly due to the Subdistrict area devel -
oped into the urban industrial sector emerged as the basis in some districts. The road network is
not well with the condition and do not meet the standard of the existing road. With the develop-
ment of the Subdistrict for Trade and Services are necessary to be an increase in the road, espe-
cially the relationship between the center - a center of the preferred road network of collectors
Pengaruh Semen OPC dan PCC Terhadap Kuat Tekan dan Kuat Lentur Pada Beton Mutu Tinggi Faktor Air Semen 0,36 Dan 0,39
Full text linkThis study used an experimental method in the Laboratory of Structural and Construction Engi-
neering Faculty, University of Lampung. The test object in this research is a concrete cylinder with
a diameter of 15 cm and 30 cm high. And the concrete beam specimen with a length of 60 cm,
width 15 cm, height 15 cm. While testing the compressive strength and flexural strength of high
strength concrete made fas 0.36 and 0.39 after the test specimen was 14, 28 and 56 days. In testing
the compressive strength of concrete fas 0.36 and 0.39, OPC cement concrete without silica fume
replacement compressive strength higher than the compressive strength of cement PCC. Value
OPC cement with fas 0.36 and 0.39 in the concrete life of 56 days each -masing amounted to
39.7264 and 34.9139 MPa. OPC concrete of cement with silica fume replacement of 10% in test-
ing concrete compressive strength fas 0.36 and 0.39, higher compressive strength of cement PCC.
The compressive strength of OPC cement with silica fume replacement fas 10% with 0.36 and 0.39
in the concrete life of 56 days each for 33,7816MPa and 30,9507MPa. In the flexural strength
testing of concrete fas 0.36 and 0.39, OPC cement concrete without silica fume penggntian strong
bending higher than cement PCC. OPC cement flexural strength values with fas 0.36 and 0.39 in
the concrete life of 56 days each for 7,3778MPa and 7,6MPa. OPC cement concrete with the re-
placement of silica fume 10% in flexural strength testing of concrete fas 0.36 and 0.39, a strong
bending higher than cement PCC. Flexural strength value of OPC cement with silica fume re-
placement fas 10% with 0.36 and 0.39 in the concrete life of 56 days each for 7,8889MPa and
8,3333MPa
