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INDONESIA
Jurnal Teknik Sipil
Published by Universitas Sebelas Maret
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 27 Documents
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Search results for , issue " Vol 2, No 2 (2014): Jurnal Teknik Sipil" : 27 Documents clear
THE RUBBERIZED CONCRETE FOR CRACK RESISTANT CONCRETE PAVEMENT M. Ali Bin Ghasheir, Fouad; Setyawan, Ary; As’ad, Sholihin
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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Abstract  The concrete is the most used material in civil engineering world. The crumb rubber had been added to the concrete instead of fine aggregate to used in a walls as a sound insulator and less heat conduction compared with concrete without rubber. (Intesar et al, 2011). Many experiments were done to find out appropriate methods of rubber application. Commonly, fully replacing coarse aggregate (gravel) or fine aggregate (sand) with rubber is not appropriate because the loss of strength is too severe. However, with small portion of aggregates replaced, the loss in compressive strength was not significant. A research study by Khatib et al (1999) and Schimizze et al (1994) suggested that rubber should not exceed (17-20%) of the total aggregate volume. Whenever possible to use the waste tyres in the construction work, it is possible to find effective solutions to prevent environmental pollution. The aim of this research to investigate the property and crack resistant of rubberized concrete. This research used crumb rubber of waste tyres in a concrete as replacement of aggregate. Three dosage of crumb rubber (5,10 and 15)% by volume were used. One mixture of plain concrete was also tested as reference and compare the results to the standard specification of rigid pavement. Those mixtures then prepared for fresh concrete and hardened concrete test. Slump test was conducted for assessing the fresh concrete performance while for hardened concrete performance, the compressive strength at 3,14 and 28 days were tested, the restrained shrinkage for early age of concrete were tested for 6 hours from casting and the shrinkage measurements taken when the age of concrete 1,3,5,7,9,11,13,15,18,21,25, and 28 days. The results of this research show that the crumb rubber was an effective material to resist the cracks in concrete. The results of compressive strength show that the compressive strength decrease when the amount of crumb rubber increase. The results of shrinkage test and restrained shrinkage test show that the cracks in the concrete decrease when the amount of crumb rubber increase. The total crack length reduce by (18.6, 55.2 and 58.2%) when the aggregate was replaced by (5, 10 and 15%) of crumb rubber. The number of cracks reduce by (11.34, 42.67 and 49.34%) when the aggregate was replaced by (5, 10 and 15%) of crumb rubber.Keywords: crumb rubber, rubberized concrete, cracks, compressive strength, shrinkage, restrained shrinkage.
THE DESIGN AND PROPERTIES OF SPLIT MASTIC ASPHALT MODIFIED WITH CRUMB RUBBER Abuseta, Ahmad Alhashmi Salam; Setyawan, Ary; Budiarto, Arif
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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Abstract Stone Mastic Asphalt, originated from Germany in the 1970s,has superior properties on heavily trafficked roads and industrial applications. Modification of split mastic asphalt with crumb rubber makes asphalt more temperature stable. The objectives of this research are: To design split mastic asphalt modified with crumb rubber mixture, to get the best composition of stone mastic asphalt modified with crumb rubber for rut and fracture resistance, to assess the physical characteristics of split mastic asphalt modified with crumb rubber and compare with unmodified SMA. Stone mastic asphalt was modified with 0%, 2%, 4% and 6% crumb rubber. The Marshal properties were conducted. The result showed that marshal stability, Marshal Quotient, Voids in Mix (VIM) and Voids in mineral aggregate (VMA) decrease with higher crumb rubber modifier. However, Marshal Flow and Void filled with asphalt (VFWA) increase when crumb rubber modifier was increased. Therefore, Crumb rubber could be used as aggregate substitute for flexible stone mastic asphalt at hot and arid region because it is temperature tolerant and can prevent asphalt cracking.Keywords: Crumb Rubber modifier, SMA, ITS, ITM, UCS
SHRINKAGE BEHAVIOR OF STEEL FIBER REINFORCED CONCRETE ON SANDWICH LAYER CONCRETE Al Mahdi Jibril, Ramadhan; Purwana, Yusep Muslih
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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AbstractShrinkage of concrete causes a serious problem in concrete. If concrete is restrained from shrinking, tensile stresses develop and it may exceed the tensile strength of concrete which causes the concrete cracks. One possible method to control or reduce the adverse effects of cracking due to shrinkage in concrete structures is the addition of fiber in the concrete. Steel fiber can improve structural strength, ductility, reduce crack widths and control the crack. In sandwich layer where its material comprises of steel fiber reinforced concrete and some other by plain concrete. The shrinkage behavior has been considerably different compared to fiber reinforced concrete and plain concrete. Therefore this study investigates the behavioral of shrinkage on the steel fiber reinforced concrete on sandwich layer concept.The test specimens were made by steel fiber dosages of 10kg/m3, 30kg/m3, 50kg/m3, 80kg/m3 and 100kg/m3 and some others for sandwich layer specimen with similar fiber dosages combined with plain concrete. The specimen form was cylinder 5 cm in diameter and 27 cm in high for drying shrinkage test. All samples were placed in open air on ambient temperature environment. The shrinkage was recorded on 1 day to 56 days. The shrinkage prediction for three year or 1000 days was also calculated. Both recorded and predicted shrinkage were then compared..The test result showed that plain concrete experienced the highest drying shrinkage and the addition of steel fiber reduced the drying shrinkage that occurred at concrete. The greater amount of fiber contained in the concrete, the lower occurrence of drying shrinkage. The shrinkage on sandwich samples recorded moderate compared to plain concrete, however this shrinkage is higher compared to samples of fully fiber reinforced concrete at the same fiber dosage. The three group of samples; steel fiber reinforced concrete, sandwich concrete and plain concrete showed the same trend of shrinkage curves following the time of hydration. The presence of steel fiber in concrete can effectively hinder drying shrinkage and affected the crack that can reduce and control the shrinkage of concrete.      Keyword: Shrinkage behavior, shrinkage prediction, SFRC, sandwich concrete, plain concrete, steel fiber..
TOLAK UKUR KINERJA TANGGUL BERDASARKAN PENILAIAN KEANDALAN, PENILAIAN PERMUKAAN TANGGUL DAN STABILITAS TANGGUL (Studi Kasus: Ruas Jurug Mojo, Surakata) Hermawan, Chitra; Suprapto, Mamok; As’ad, Sholihin
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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ABSTRACT Flood is known as a disaster that usually comes suddenly, and therefore, people are not prepared. As a result, it causes a dead loss, both human and material. In order to anticipate flood, some dikes have been built.Bengawan Solo dike has changed through time. Damages along the dike have been identified and followed-up by conducting some improvements to make it function well. However, since the repairs are carried out based on the occurrence of landslide or burst, there are many portions of the dike that are damaged but receive no rehabilitation. In fact, in some portions of the dike crossing densely populated settlements, there are many buildings cutting through the outside part of the dike base. Furthermore, portions of the dike in that area have been transformed to street with uncontrolled load. For example, it is found that some vehicles loading construction materials passing on the dike. But, in fact, this sort of loading has not been predicted in the planning. Hence, it is important to foreknow the benchmark of dike performance to assess the performance of dike before landslide or burst occurring.This research was conducted to the Jurug-Mojo portion of Bengawan Solo dike. It is 1.317 m long and is divided into 13 portions, each of which is 100 m long. The parameters applied in this research were cross-section, dike elevation and data about land, while the variables were debit, gravity acceleration, water surface elevation, soil pore index, shearing force, specific weight, and friction angle. There were 3 (three) methods proposed to assess the benchmark of the dike performance, including reliability assessment, dike surface assessment (PCI Mmethod) and dike stability assessment (Bishop Mmethod).The findings of the research are as follows. The maximum debit that can be embanked by the dike is 1,489 m3/s; the reliability index is 0.675; the PCI index is 59.4 (good); the dike stability index before overtopping is 2.771 (stable); the dike stability index when overtopping is 1.075 (unstable), the water stability index when lowering 1 m is 1.775 (stable). Keywords: dike, reliability index, stability, PCI (Pavement Condition Index) 
NFLUENCE OF USING NON-STANDARD SPECIMEN ON COMPRESSIVE STRENGTH OF NORMAL AND HIGH STRENGTH CONCRETE Esbata, Abdulati Mohamed; Kristiawan, Stefanus Adi; As’ad, Sholihin
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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Abstract Compressive strength of concrete is one of the most important  test  for  construction properties for quality control of concrete and design new constructions, there are different molds that are used for casting concrete specimen during the concrete works according to various standards at different countries. On the other hand, it is known that different shapes and sizes of concrete specimen can cause differences in the results of compressive strength. In this study the influence of specimen sizes and shapes on compressive strength of normal and high strength concrete are investigated using experimental study. The experimental study was conducted for six different specimen types cube 150 mm, cube 100 mm, cube 75 mm, cylinder Ø150x300 mm, Ø100x200 mm, Ø75x150 mm. At six different concrete strength level was 20,30,40,50,60 and 70 MPa according to standard cube specimen and tested at 28 Days of age. For The experimental study, hardened density, non-destructive tests (Rebound hammer and UPV), compressive strength and splitting tensile strength for different concrete strength level were performed and some analyses were done to obtain conversion factors and some relations between these tests. The results of analyses indicate that for all testing, there is a bigger influence of variation of size and shape of the specimens, by changing the compressive strength level. The compressive strength increases as the specimen size decreases.. Also The compressive strength of  cube 150 mm is generally higher than strength cylinder Ø150x300 mm and The conversion factors of compressive strength between is varied from 0.76 to 0.88 for the designed cube compressive strength of  20 to 70 MPa. The conversion factors of compressive strength between standard and non-standard specimen at different concrete strength at 28 days to equivalent 150 mm standard cube specimen had been determined and presented in table 4.7.  The correlation between (split tensile test / Schmidt hammer test/ UPV test) of standard specimen 150 x 150 mm cube to compressive strength of non-standard specimen had been determined. Keywords: compressive strength level, influence of specimen sizes and shapes, conversion factors, splitting tensile strength, Schmidt hammer test, UPV.
ASESMEN STRUKTUR GEDUNG KANTOR CAMAT NONGSA BATAM Murni, Cahaya; Rahmadi, Agus Parwito
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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Abstrak  Kondisi bangunan gedung Kantor Camat Nongsa Batam mengalami retak struktur yang menyebar pada beberapa bagian struktur bangunan. Retak tersebut secara visual terlihat adanya lendutan pada balok struktur, hal ini dikhawatirkan bangunan sudah tidak aman lagi sesuai fungsinya. Tesis ini bertujuan untuk mengetahui kekuatan pada komponen struktur bangunan serta mengetahui tingkat keamanan struktur pada kondisi eksisting bangunan.Tahapan asesmen yang digunakan yaitu tahapan asesmen awal dan asesmen detail. Tahapan analisis  dilakukan terhadap kondisi kekuatan komponen struktur. Proses asesmen dilakukan melalui pengujian lapangan. Pengujian di lapangan menggunakan peralatan Schmidt Rebound Hammer Test untuk mengetahui kuat tekan beton dan mutu beton, Waterpass, Theodolite, , dan meteran untuk pengukuran geometris bangunan. Analisis data menggunakan ETABS V9.7.2.Hasil penelitian yang dilakukan dilapangan menunjukkan bahwa  kualitas beton pada bangunan gedung ini bervariasi pada kolom 21.71MPa, balok 29 MPa dan Plat 30.6 MPa. Pada balok lantai dua( 87%) dan balok lantai tiga  (84%) mengalami lendutan yang sudah melebihi nilai batas lendutan yang diijinkan sesuai ketentuan di dalam  peraturan yang ada. Nilai interstory drift terbesar 18.637 mm. Perlunya rehabilitasi pada komponen struktur sehingga direkomendasikan adanya perkuatan struktur pada komponen struktur.
THE STRENGTH AND STIFFNESS MODULUS OF THIN LAYER HOT MIX ASPHALT CONCRETE AT VARIOUS TEMPERATURE Elshawesh, Abdulhakim Mustafa; Setyawan, Ary; As’ad, Sholihin
Jurnal Teknik Sipil Vol 2, No 2 (2014): Jurnal Teknik Sipil
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AbstractStiffness modulus of asphalt concrete mixture is one of the most important parameters for the flexible pavement design that is very susceptible from temperature and time loading. The stiffness modulus here may be defined as a measure of the load spreading ability of material. The stiffness of asphalt mixture can be measured through various laboratory researches and empirical methods. Various laboratory researches have been employed to measure this property of asphalt such as indirect tensile modulus test, ITSM.The aims of this research were to achieve the viability of using asphalt 60/70 pen with different temperature on strength and stiffness modulus on thin layer HMA (4 cm) compared to Asphalt Concrete Wearing Course (6.8 cm). The other purpose is to get to know the effect of the using thin layer HMA (4 cm) in different climate region. All of the asphalt concrete mixtures of thin layer HMA and AC-WC which were used in this research based on Marshall Mix design according to Indonesian standard (Bina Marga 2010). The laboratories tests which have been conducted in this research were: indirect tensile strength (ITS), unconfined compressive strength (UCS) and indirect tensile stiffness modulus (ITSM) at temperature 10°C, 20°C, 40°C and 60°C.In comparison with the results of indirect tensile strength test, indirect tensile stiffness modulus test and unconfined compressive strength test, it is noticed that the strength and stiffness modulus of thin layer hot mix asphalt was affected by the temperature which the temperature degree might increase to decrease or the way around. From the results of ITSM test for HMA and AC-WC showed that starting from the temperature 20°C to 60°C there is no significant value of stiffness behavior at them. However, there is slight different value at temperature 10°C mixture respectively. Keywords: Thin layer, AC-WC , Asphalt 60/70 pen, ITS test, UCS test & ITSM test @ (10 ºC , 20 ºC , 40 ºC , 60 ºC).

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