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Agata Iwan Candra
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U Karst
Published by Universitas Kadiri
ISSN : 25794620     EISSN : 25810855     DOI : http://dx.doi.org/10.30737/ukarst
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
U KaRsT is a journal of the civil engineering research the University of Kadiri published twice a year in April and November. First published in April 2017. U KaRsT already has both ISSN printed and online, for ISSN (Print) is 2579-4620, and ISSN (Online) is 2581-0855.
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Articles 10 Documents
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Search results for , issue "Vol. 4 No. 2 (2020): NOVEMBER" : 10 Documents clear
Measurement Of Occupational Safety And Health Risk Levels Of Kadiri University LP3M Building Sony Susanto; Hendy Hendy; Budi Winarno; Agata Iwan Candra
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.782

Abstract

Construction work for high rise buildings is a dense work activity with a high level of risk. The purpose of this research is that construction of the building takes place in the middle of lecture activities where many students, lecturers, and staff carry out activities in the campus environment, considering that construction projects are generally vulnerable to work accidents. This study investigated the identification, K3 risk assessment, and how to control OHS risks in Kadiri University LP3M building projects. The assessment method uses a matrix sourced from AS / NZS 4360: 2004. The study population numbered 58 workers ranging from workers, artisans, project guards, forepersons, executors, and office staff. The sample in this study amounted to 38 respondents. Data collected from questionnaires to respondents. The results of the study showed that immovable/ tripped objects with a risk index of 20 included a very high-risk classification, high-risk classification of 4 variables, classification at medium risk level as many as ten variables can endanger workers and jobs while classification at a low-risk level as much as two variables.
EXPERIMENTAL STUDY OF LOCAL SOLID WOOD POST-FIRE BEHAVIOUR Ni Nyoman Kencanawati; B Anshari; J Fajrin; Hariyadi Hariyadi; A Beriman
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.909

Abstract

When wood structures are exposed to high temperatures, they will decompose to provide a char layer and pyrolysis zone, an insulating material that inhibits further degradation. This experimental study aims to determine the char thickness and pyrolysis of solid wood exposed to fire for 30, 45, and 60 minutes. The post-fire shear strength has also been evaluated. The solid woods were locally from Nusa Tenggara Island, namely Jati Putih, Bajur, and Rajumas. According to the Indonesian National Standard of the heating curve for structures, the temperature growth was SNI-1741: 2008. Obtained The char layer's highest average thickness was within 60 minutes of combustion with the highest temperature of 1055oC. The char layer for Jati Putih, Bajur, and Rajumas are 2.12 mm, 7.89 mm, and 6.53 mm. Meanwhile, the pyrolysis layers are 8.78 mm, 9.13 mm, and 14.82 mm, respectively, for Jati Putih, Bajur, and Rajumas. Besides, the post-fire shear strength of all wood species shows an increase in shear strength in the core. Wood can still sustain the load during a fire because there is a char layer preventing the core section from immediately exposed to the fire.    
Strategy To Reduce Traffic Jams On Piet A. Tallo Street, Kupang City Amy Wadu; A A Tuati; M R Sodanango
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1014

Abstract

Problems when the flow of traffic on urban roads exceeds the road's capacity, resulting in traffic jams. It happened on the Piet A. Tallo street during peak hour conditions. Especially in converted type of route from 4/2T to 2/2TT, which results in a buildup of traffic flow at that point. This research aims to analyze the volume to capacity ratio (v/c) and provide recommendations for long-term strategies to reduce traffic jams on Piet A. Tallo Street. Traffic flow and capacity analysis based on Guidelines for Indonesia Road Capacity 2014 (PKJI2014), while the projected growth in the number of vehicles in the next 20 years, uses the linear regression method. The results show that peak traffic flow exceeds road capacity in the 2/2TT segment with a v/c ratio of 1.08. Recommendations for handling this by regulating side friction and changing road segment type 2/2TT to 4/2T. Using linear regression projected traffic flow in 2040, road capacity can still serve traffic flow with a maximum v/c ratio of only 0.93.
Direct Shear Strength of Clay Reinforced with Coir Fiber Anita Widianti; Willis Diana; Maratul Hasana
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1020

Abstract

Indonesia is the largest coconut producing country in the world. However, the resulting coir waste is still rarely used for structural materials. This research studied the effect of random inclusion of coir fiber on the shear strength of clay with high plasticity. The carried test in this study is a direct shear strength test. The fiber content variations used are 0%, 0.25%, 0.50%, 0.75%, and 1% of the dry weight of the mixture with a fiber length of between 30 mm to 50 mm. The results show that the reinforcement of coir fiber can increase the cohesion and friction angle. The maximum increase in cohesion value was obtained at fiber content of 0.75%, which was 39.66%. The increase in the value of the friction angle was obtained at 1% fiber content, which was 46.67%. The optimum coir fiber content was achieved at the fiber content of 0.75%. With this content, the value of the shear strength reaches its maximum with an increase of 39.4% at a normal stress of 8.071 kPa.
Comparison of Pushover Method and Direct Displacement Method in Earthquake Load Analysis with Performance-Based Design Concepts I Nengah Sinarta; I Made Bagastia Pinandika
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1025

Abstract

The development of earthquake-resistant building designs led to developing an analysis method for earthquake loads, one of the performance-based methods. This method uses structural displacement as an approach. The purpose of this analysis method was to guarantee the structure's performance so that it will be able to withstand forces due to earthquake loads. In this paper, an analysis of a building structure's design was more reliable with applicable regulations in Indonesia and determined building performance based on FEMA 356. The study was carried out using the direct displacement method and the pushover analysis method, with the displacement targets and structure performance levels being compared with each other. Based on these results, it can conclude that the use of the direct displacement method and pushover analysis can produce almost the same displacement target values and structure performance levels. Comparison using pushover analysis design performance targets can be fulfilled so that the Direct Displacement Based Design Method can be used in structures. The total displacement value of the x-x (δT) direction is 0.300 m, and the y-y course is 0.115 m.
SOIL SHEAR STRENGTH PARAMETER ANALYSIS BASED ON BEHAVIOR ANALYSIS OF LANDSLIDE CASE Dyah Wahyu Apriani; Umar Mustofa; Rachmad Hidayat
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1046

Abstract

Slope failure is a complex event. It can provide useful information about the condition of soil parameters on the failed slope in the same way it can provide an opportunity to evaluate the stability of other slopes. To evaluate the occurence of slope failure, unit weight data and shear strength properties of soil are needed, as well as methods of analysis including failure mechanisms. One of the methods used to evaluate landslide events is reverse analysis. In this study, reverse analysis was carried out on landslides that occurred on the slopes of D-D 'and F-F' at the Integrated Campus Building of the Institut Teknologi Kalimantan. The finite element method is used to analyze the safety number of the slopes under review. From the results of the reverse analysis, it was obtained that the soil parameters at the time of collapse in the top layer resulted in the value of unit weight (γ) = 20 kN / m2, Cohesion (c) = 2 kPa and Internal friction angle (φ) = 27 ° . Slope failure occured due to an increase in soil volume weight value, as well as a decrease in soil shear strength parameters, namely cohesion and internal friction angle.
COST PERFORMANCE ANALYSIS AND TIME DEVELOPMENT CONSTRUCTION PROJECT BRIDGE CHAIN KARANGGENENG NAWACITA CS USING THE EARNED VALUE METHOD Bobby Damara
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1067

Abstract

Cost, quality, and time are mandatory targets of construction management; project work can be said to be successful if triple constants cost, quality, and time the construction work of the Karanggeneng Nawacita Cs Suspension Bridge is a JUDESA project APBN project and has a period of 19 weeks working days with a budget of Rp 8.213.826.000, in the process of implementing the bridge construction, it is not free from several technical and non-technical constraints, the method earned value in this study used to determine Early Warning and integrate the concept of time and cost from the method, it earned value can be seen the progress and performance of the project with SV, CV, SPI, CPI, ECD, and EAC, from this study the results obtained ETC Rp 3.322.492.617. ETS review of the 14th week is 39 days, and to complete the project is EAC greater than Rp 82.137.617 of contract costs. While completing the project, EAS is 137 days, requiring additional work time for 12 days. Based on the results of the analysis conducted by the service provider must take appropriate fast action to avoid excessive over budget
Performance Analysis Of “Toga” Foundation With Cap On Thick Soft Soil Based On Laboratory Models And Finite Element Analysis Melissa Kurnia; Paulus Pramono Rahardjo
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1072

Abstract

Various alternative foundations are offered depending on soil conditions from the results of soil investigations. In difficult soil types such as thick, soft soil layers, pile foundation is generally used to avoid the excess settlements, but deep foundations for small buildings are not the right solution when viewed from a cost perspective. One of the more economical foundations is to use the” toga” foundation, with a plate on top and a caisson underneath where the caisson can be inserted into the soil with an open end. Through this study, the carrying capacity of the” toga” foundation will be analyzed. Then the foundation will be made on a laboratory scale and tested with axial load. The load and deformation relationship were analyzed using PLAXIS 3D analysis. It can be concluded the performance of the ”toga” foundation on thick, soft soil can be used for two-floored buildings
EFFECT OF ADDITIVE ZEOLITE MATERIALS ON THE STRENGTH OF RED BRICK POST BURNING Prima Eko Agustyawan; Samsul Arif
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1181

Abstract

This research aims to determine how to make bricks with additive Zeolite with a composition of 14%, 16%, 18%, and 20%. This research method using the experimental method, this research concludes that red bricks are added with additive Zeolite with variations in the addition of 14%, 16%, 18%, and 20%. 2 samples were made for each additional percentage of Zeolite Additive, with the mold size according to the fabrication length 21 cm x 10 cm x 5 cm. By going through the drying process for approximately 14 days and burning for approximately 3 days. The resulting increase in compressive strength even though some of the variants experienced a decrease. The addition of the red brick variant with a composition of 0% produces an average compressive strength of 30.95 kg / cm2 . The 14% variant produces an average compressive strength of 35.71 kg / cm2, the 16% variant produces an average compressive strength of 40.48 kg / cm2, 18% and 20% variants produces an average compressive strength of 33.33 kg / cm2. The highest increase in compressive strength is the 16% variant, with an average compressive strength value of 40.48 kg / cm2
THE EFFECT OF USING CERAMIC WASTE POWDER AS A SUBTITUTE FOR CEMENT ON THE COMPRESSIVE STRENGTH OF K250 CONCRETE Samsul Arif; Dwi Kartikasari
U Karst Vol. 4 No. 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1191

Abstract

In every construction work, you will find the remains of building materials no longer used and disposed of as waste, one of which is a ceramic waste. Ceramic waste is waste that has no selling value. Therefore the authors in this study will utilize ceramic waste as a substitute for cement with concrete quality K250. Several studies have also explained that ceramic waste contains silica, which has high adhesion, making it suitable as a substitute for cement. The process of mixing ceramic waste as a K250 quality concrete mixture is carried out according to the Indonesian SNI Standard and ASTM standards by laboratory testing using a variation of 3%, 4%, and 5% as a substitute cement. From these results, the composition of the addition of 3% ceramic waste has an average compressive strength of 330.99 kg/cm2, a composition of 4% has an average compressive strength value of 243.88 kg/cm2, and a percentage of 5% has an average compressive strength value 258.41 kg/cm2. The more the ceramic waste mixture as a substitute for cement, the lower the compressive strength of the concrete

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