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Pengaruh Waktu Perendaman Terhadap Uji Kuat Tekan Paving Block Menggunakan Campuran Tanah, Semen Dan Abu Sekam Padi dengan Alat Pemadat Modifikasi
Full text linkPaving block is made of by mixturing cement portland or other hidrolic material, water, and agre-
gate or without any other material. In this research paving blok will be made by using of soil, ce-
ment, and rice husk ash. Besides, soaking of paving block is aimed to improve compressive the
paving block that is suitable with SNI 03-0691 (1996). The samples of soil that is used came
fromq ITERA, South Lampung. The making of paving block samples consists of two stages. First,
mixture A (10% of cement, 5% of rice husk ash, 85% of silt soil) and mixture B (15% of cement,
5% of rice husk ash, 80% of silt soil) and the making of samples in the second stage is to deter-
mine the effect of immersion of compressive the paving block in which the samples using is sam -
ples with optimum compressive result from making samples in the firsh strage by time variant in 0
day, 7 days, 14 days, 21 days and 28 days and also by doing pre-burning and post-burning. From
the experiment result of innovation compressive this paving block includes to the quality class D
and absorption of paving block that is made of mixturing soil, cement, and rice husk ash is not ap-
propriate with SNI 03-0691 (1996). The adding of rice husk ash gives a little influence in improv-
ing compressive of paving block. The soaking that is done to paving block causing the decrease of
compressive till 45,7%. The highes compressive produced by paving block post-burning during
immersion 0 day that is 11,70 Mpa
Pengaruh Penggunaan Abu Cangkang Lokan, Serbuk Bata Merah dan Aditif Anti Pengelupasan pada AC-BC
Full text linkThis study aims to find a right formula of asphalt concrete binder course (AC-BC) hotmix by adding the ash of lokan’s shell (ACL), red brick powder (SBM) and anti stripping agent. Chemical analysis for ACL and SBM used SEM-EDX analysis. Hotmix sample testing used Marshall method. The results showed that the ACL contains 34,77% carbon and 65,23% calcium oxide. SBM was containing 34,09% alumina, 42,55% silica dioxide, 0,73% potassium oxide, 1,98% titanium (IV) oxide and 20,65% ferrous oxide. The addition of filler ACL SBM 50% + 50% from 10% cement filler; the ingredient of anti stripping agent wetfix was 0,3% optimum asphalt content (OAC), increasing the value of stability and flow mix AC-BC amounted to 51,5% and 41,5%. Anova test results showed that the value of F for stability is of 9,21, the value of F for flow amounted to 19,19. Ftable at 99% confidence level refers to the value of 7,82. This proves that the addition of ash shell seashell, red brick powder and additive anti sloughing have significant effect on the stability and flow value mix AC-BC. Durability and flexibility of road construction types AC-BC for the better
Analisis Time Cost Trade Off Untuk Mengejar Keterlambatan Pelaksanaan Proyek Di Bandar Lampung
Full text linkDuring the execution of construction projects, often there is a mismatch between the planned
schedule and realization. It could lead to the overruns of the implementation time and cost. De -
lays can be overcomed by acceleration of the implementation in order to achieve the targeted
plan. However, in the decision to speed up the implementation of the work, it is necessary to take
into account the expected results of financing so that the minimum cost achieve without neglecting
the required standards of quality. The alternatives that can be used are the addition of works and
the labors themselves.
From the analysis results obtained that the acceleration that produces the minimum total cost (not
including indirect costs) for the project Lampung Hotel Zodiac is to use more labor, the total cost
and the total duration of each to Rp. 29,523,160,619 be 309 days. Acceleration to Hotel Park In
By Radisson is to accelerate without penalty using more labor, the total cost and the total duration
of each to Rp. 201 974 119 946 and 196 days. While Toko Mitra Hasil Sentosa project is to in -
crease working hours, with the total cost and the total duration of each to Rp. 18,348,782,435 and
263 days
ANALISIS KEBUTUHAN PENANGANAN JARINGAN JALAN DI WILAYAH KABUPATEN PRINGSEWU BERBASIS TINGKAT PELAYANAN
Full text linkThis study aims to identify patterns of movement in Pringsewu District and analyzing the handling
needs of the road network in the Pringsewu District in 2014, 2019, 2024 and 2039 based on VC
ratio through 4 stages of transportation modeling using tranplan software. To support this analy-
sis, also conducted research about level of service in Pringsewu District based on public percep-
tion as road users. The primary data was obtained through a survey of LHR and road user per-
ception survey conducted through questionnaires. Secondary obtained through relevant institu-
tions. The result of analysis is a pattern of movement in 2014, 2019, 2024 and 2039 is almost the
same. For 2024 year, road handling by building the North Ring Road considered to necessary be -
cause VC Ratio of some streets ≥ 0.9. Road handling in 2039 by increased capacity through
widening of the road. Based on the user's perception, level of road service in Pringsewu District is
good enough. Level of road sservice in the Pringsewu District highly influenced by accessibility,
mobility, safety and road conditions
ANALISIS PERBANDINGAN PARAMETER TRANSFORMASI ANTAR ITRF HASIL HITUNGAN KUADRAT TERKECIL MODEL HELMERT 14-PARAMETER DENGAN PARAMETER STANDAR IERS
Full text linkThis research aims to compare the 14 transformation parameters between ITRF from computation
result using the Helmert 14-parameter models with IERS standard parameters. The transforma-
tion parameters are calculated from the coordinates and velocities of ITRF05 to ITRF00 epoch
2000.00, and from ITRF08 to ITRF05 epoch 2005.00 for respectively transformation models. The
transformation parameters are compared to the IERS standard parameters, then tested the signifi-
cance of the differences. The transformation parameters are used to reversly transform to obtain
the common points coordinates ITRF00 and ITRF05 system. The value of 14-parameters are also
used to transform the check points coordinates on the ITRF00 and ITRF05 coordinate system. The
results show that the RMSe difference of the coordinates of the reverse transformation result with
Helmert model using computed transformation parameters and the IERS standar parameters are
0.1 mm (for ITRF00) and 0.8 mm (for ITRF05). The results of significance test of 14 parameters to
IERS standard parameters are only scale factor (ds) on the transformation from ITRF05 to
ITRF00 statistically significant difference. However RMSE values of the coordinate transforma-
tion of the check points (Helmert model) using calculated and IERS standar parameters are not
difference. It can be concluded that the results of the transformation parameter of 14-parameter
Helmert model with the least squares computation is not much different with IERS standard pa-
rameter
Pengaruh Fraksi Pasir Dalam Campuran Tanah Lempung Terhadap Nilai CBR dan Indeks Plastisitas Untuk Meningkatkan Daya Dukung Tanah Dasar
Full text linkCBR-value is used as an index of soil strength and bearing capacity. This value is broadly used and applied in design of the base and the sub-base material for pavement. Sand –stabilized soils are often used for the construction of these pavement layers and also for embankments. CBR-value is a familiar indicator test used to evaluate the strength of soils for these applications. CBR-test was conducted to characterize the strength and the bearing capacity of the studied soils and their mixtures with sand. CBR-values of the diference soils, compacted at optimum water content, Atterbeg limit are given in this report. All the specimens were prepared using a standard proctor test.
The results of the research will be made in the form of a graph on the relationship between the value of CBR to the liquid limit., LL, maximum dry density. The results also will display the graphic relationship between the plasticity index with content of sand fraction and clay fraction.
The test results show that the Atterberg limits that a percentage of the original soil and addition of sand. ff (loose soil). The results showed that Relationships LL CBR value and the fraction of sand fraction that the lower the value of LL will increase the value CBRnya. The results showed that the content of the sand can increase the value CBRn. CBR value is highest at 71.11% sand content
Analisa Karakteristik Tanah Timbunan Ditinjau dari Hubungan Gradasi Butiran Tanah dengan Nilai CBR Rendaman dan Tanpa Rendaman
Full text linkThe California bearing ratio (CBR) is a penetration test for evaluation of the mechanical strength
of natural soil, subgrades and basecourses carriageway construction. The basic site test is per-
formed by measuring the pressure required to penetrate soil or aggregate with a standard area.
The measured pressure is then divided by the pressure required to achieve an equal penetration on
a standard crushed rock material. The CBR test is described in ASTM Standards D1883-05 (for
laboratory-prepared samples). CBR-value is used as an index of soil strength and bearing capac-
ity. This value is broadly used and applied in design of the base and the sub-base material for
pavement.
CBR-test was conducted to characterize the strength and the bearing capacity of the nine
studied soils from with nine place diference. experiments conducted in the laboratory of soil
mechanics Malahayati university. The soil test done is physical, standard proctor and CBR
Unsoaked. CBR value obtained was 9.33 % minimum value and a maximum value of 19%. CBR-
values need to be interpreted in the context of the general relationship between the CBR
values and the gradation of the soils. It can used in pavement or road and other applications
