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Sahat Martua Sihombing
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Analisis Pondasi Bored Pile Pada Proyek Metrostater Depok Jawa Barat Achmad Pahrul Rodji; Sahat Martua Sihombing; Mochammad Risky Ramadhan
FORUM MEKANIKA Vol 11 No 1 (2022): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v11i1.1663

Abstract

Pondasi merupakan bagian dari struktur bawah (sub structure), mempunyai peranan penting dalam memikul beban struktur atas sebagai akibat dari adanya gaya-gaya yang terjadi pada struktur atas (upper structure) seperti gaya angin, gaya gempa maupun berat struktur itu sendiri. Tujuan dari penelitian ini untuk menghitung penurunan (settlement) pondasi bored pile dan menghitung kuat dukung pondasi bored pile berdasarkan hasil standar penetration test (SPT). Metode perhitungan untuk menghitung penurunan menggunakan metode Vesic (1970) dan Software Plaxis. Metode perhitungan untuk menghitung kuat dukung pondasi menggunakan metode Meyerhoff (1956), metode Reese & Wright (1977) dan software Plaxis. Berdasarkan perhitungan Vesic (1970) didapat penurunan sebesar 20,83 mm dan pada Software Plaxis didapat penurunan sebesar 12,32 mm. Berdasarkan data SPT yang diperoleh hasil perhitungan menggunakan metode Meyerhoff (1956) Qu sebesar 1627,8 ton, dengan metode Reese & Wright (1977) Qu sebesar 1276,4 ton dan dengan software Plaxis Qu sebesar 1300 ton. Dari hasil perhitungan penurunan didapat software plaxis lebih mendekati hasil axial test dibanding metode Vesic(1970) begitu pula untuk perhitungan daya dukung pondasi metode Reese & Wright (1977) lebih mendekati hasil axial test dibandingkan dengan metode Meyerhoff (1956) dan software plaxis.
UTILIZATION OF RUBBER SANDALS WASTE AS PARTIAL SUBSTITUTION MATERIAL FOR COARSE AGGREGATE IN CONCRETE MIXTURE PANDU ARIFIN; SAHAT MARTUA SIHOMBING; ACHMAD PAHRUL RODJI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

In Indonesia, there is an increasing demand for building materials, especially concrete which is popularly used to construct bridges, houses, buildings, and highways because it is cheap and easy to form. However, concrete has weaknesses in resisting tensile loads and the repeated use of aggregates leads to a reduction in natural resources. This study investigates the use of waste rubber sandals as an alternative to coarse gravel in concrete to reduce environmental damage and add economic value to construction projects through experimental concrete strength testing. From the data analysis and discussion in the previous chapter regarding the use of rubber sandal waste with variations of 0%, 5%, and 10%, the results of compressive strength testing on normal concrete at the age of 28 days were 440 kN (f'c 24.91 MPa), while in variation 1 rubber sandal waste 5% was 297 kN (f'c 16.82 MPa) and in variation 2 rubber sandal waste 10% was 248 kN (f'c 14.04 MPa).
THE EFFECT OF CONCRETE COMPRESSIVE STRENGTH TESTING USING RUBBER SEED SUBSTITUTION AS A PARTIAL REPLACEMENT OF FINE AGGREGATE MARLIANA PUTRI; SAHAT MARTUA SIHOMBING; GALI PRIBADI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

The idea of environmental conservation has influenced the development of more environmentally friendly construction technologies, with the integration of natural materials such as rubber seed waste into construction materials. The construction industry faces challenges from production waste and material requirements that increase with population growth. Utilizing waste as an alternative material not only reduces pollution but also helps conserve non-renewable natural resources, such as replacing sand with rubber seeds in concrete mixes. The results of compressive strength testing on normal concrete at the age of 28 days reached 440 kN (f´c 24.91 Mpa), while variation 1 of 5% rubber seed waste reached 310 kN (f´c 17.55 Mpa), and variation 2 of 10% rubber seed waste reached 276 kN (f´c 15.63 Mpa). The compressive strength of concrete using rubber seed waste as a fine aggregate substitution with a 5% variation obtained an average compressive strength at the age of 7, 14, and 28 days of 8.72 MPa, 15.06 MPa and 17.55 Mpa. The compressive strength of concrete using rubber seed waste as a substitute for fine aggregate with a 10% variation obtained the average compressive strength at the age of 7, 14, and 28 days of 7.81 MPa, 12.63 MPa, and 15.63 Mpa. It does not meet the SNI 1974-2011 standard that the compressive strength of fc'25 concrete plan at the age of 7 days is 60% with a value of 15.06 MPa, the age of 14 days is 84% with a value of 21.06 MPa, the age of 28 days is 100% with a value of 24.91 MPa.
THE EFFECT OF GREEN SHELL POWDER WASTE AS A SUBSTITUTE FOR FINE AGGREGATE IN ASPHALT CONCRETE WEARING COURSE MIXTURE DANIEL SIMATUPANG; SAHAT MARTUA SIHOMBING; ACHMAD PAHRUL RODJI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Waste, the residue of production that has lost its primary purpose, including garbage and wastewater, is a global problem due to its potential for contamination and the spread of disease. In Indonesia, it is estimated that around 21.88 million tons of waste will be produced in 2021. To address this problem, it is important to find ways to reduce waste, such as using it in asphalt production. In an effort to create a more durable road pavement, researchers have experimented with mussel waste as an additive to improve asphalt quality. This study examined the use of mussel waste to replace fine aggregate in asphalt concrete layers, in the hope of extending the life of the road. When mussel waste powder was substituted for 25% filler in the Asphalt Concrete-Wearing Concrete mixture, Marshall characteristic analysis resulted in a stability value of 2487 kg, VMA 36.51%, flow 3.35 mm, VIM 26.19%, and MQ 742 kg/mm, all of which met the requirements. However, the VFB value of 28.27% does not meet the requirements of Bina Marga 2018. The combination produces a stability value of 2568 kg, VMA 37.31%, flow 3.4 mm, VIM 27.12%, and MQ 756 kg/mm ​​in the variation of green mussel powder waste 50%, all of which meet the requirements. However, the VFB value of 27.31% does not meet the requirements of Bina Marga 2018. The mixture design with the results of the cement filler presentation shows the following composition: 17% for hot bin I, 45% for hot bin II, 32% for hot bin III, 6% for cement filler, and 6% for asphalt.
THE EFFECT OF USING SUGAR CANE WASTE ON CONCRETE FLEXURAL STRENGTH FAJAR RIVANI; SAHAT MARTUA SIHOMBING; INDRIASARI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Modern construction technology has developed with the principle of environmental concern, integrating natural materials into construction materials to support environmentally friendly practices. Green construction includes processes that minimize the use of hazardous materials, do not disturb the peace of the population, limit waste production, maintain the balance of nature, and avoid the use of hazardous chemicals. In industry, rapidly developing technology often produces negative waste. Population growth increases the need for construction materials from natural and artificial sources. One solution is the utilization of local resources, including waste and garbage, which not only reduce pollution but also as an alternative to conventional building materials, such as the use of bagasse waste in construction. Based on data analysis and conversations that have been described in the previous chapter regarding the use of bagasse waste with variations of 0%, 10%, and 15%, the results of the flexural test of fc'25 concrete, namely after 28 days, the strength of ordinary concrete is 3.67 MPa, while variation 1 with 10% bagasse reaches 4.06 MPa, while for variation-2 with 15% bagasse reaches 4.49 MPa. The test results appear to meet the minimum requirements of 14% of the planned concrete compression test. The increase with the addition of sugarcane pulp was an average of 10%.
ANALYSIS OF CONCRETE COMPRESSIVE STRENGTH USING LIGHTWEIGHT BRICKS AS A PARTIAL REPLACEMENT OF FINE AGGREGATE TETUKO WAHYU JATMIKO; SAHAT MARTUA SIHOMBING; BERMANDO SIAGIAN
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Infrastructure development is a top priority in Indonesia due to economic growth and demographic changes. With a budget of 149.81 trillion in 2021, infrastructure development is prioritized for economic recovery from COVID-19. Increased construction activities, including buildings, roads, and bridges, increase the demand for materials such as concrete, which is chosen for its strength and affordable cost. However, excessive sand mining for concrete has a negative impact on the environment. In addition, the increase in construction waste emphasizes the importance of waste management. This study explores the use of lightweight brick waste as a partial substitute for sand in concrete, focusing on its effect on the compressive strength of concrete. The following are the conclusions that can be drawn based on data analysis and discussion regarding the utilization of lightweight brick powder waste with variations of 0%, 12%, and 17% that have been explained in the previous chapter, the results of the compressive strength test on normal concrete at the age of 28 days reached 440 kN (fc'24.91), while variation 1 with 12% lightweight brick substitution reached 345 kN (fc' 19.53), and variation 2 with 17% lightweight brick substitution reached 309 kN (fc'17.49).
THE EFFECT OF USING RED BRICK WASTE MIXED WITH ASPHALT CONCRETE WEARING COURSE DANANG ARIS MUNANDAR; SAHAT MARTUA SIHOMBING; LYDIA DARMIYANTI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Flexible pavement is a road construction that uses aggregate and asphalt as a binder to create a strong road layer. This pavement is able to withstand and distribute vehicle loads to the underlying soil layer and is often used on roads with reduced loads and traffic. This study used AC 60/70 penetration asphalt, which is suitable for hot climates and high traffic. With the large amount of red brick waste in Indonesia, this study utilizes the waste as a partial substitute for fine aggregate in the laston mixture. The title of this study is "The Effect of Using Brick Waste on Asphalt Concrete Wearing Course Mixture". The Marshall test characteristics on the AC-WC mixture using red brick powder as a filler substitute with a variation of 40% resulted in a stability value of 2487 kg, a VMA value of 36.51%, a flow value of 3.35 mm, a VIM value of 26.19% and an MQ value of 742 kg/mm ​​already meeting the specifications. For the VFB test value of 28.27%, it does not meet the 2018 Bina Marga specifications. Meanwhile, red brick powder with a variation of 80% produces a stability value of 2568 kg, a VMA value of 37.31%, a flow value of 3.4 mm, a VIM value of 27.12% and an MQ value of 756 kg/mm ​​already meets the specifications.
ANALYSIS OF PILE FOUNDATION PLANNING IN THE CONSTRUCTION OF THE PKK - DEKRANASDA BUILDING IN MAKASSAR CITY GEDE SUMANTRA; ACHMAD PAHRUL RODJI; SAHAT MARTUA SIHOMBING
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 01 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - JANUARY-APRIL 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Concrete consists of cement, sand, gravel and water, with cement being the main binder that affects its quality. However, the increasing cost of raw materials and the environmental impact of lime mining and sand dredging are challenges in construction. To address this, the study proposed the use of bamboo fiber as an environmentally friendly and economical additive. This study tested the variation of 0%, 10%, and 15% pulung bamboo fiber waste on the compressive strength of concrete. The results showed that normal concrete without bamboo fiber had a compressive strength of 452 kN (fc' 26.08 MPa). The addition of 10% bamboo fiber decreased the compressive strength to 404 kN (fc' 23.32 MPa), while the addition of 15% decreased it further to 393 kN (fc' 22.68 MPa). The more bamboo fiber added, the more the compressive strength of the concrete decreased.
Co-Authors Achmad Pahrul Rodji BERMANDO SIAGIAN DANANG ARIS MUNANDAR DANIEL SIMATUPANG FAJAR RIVANI Gali Pribadi GEDE SUMANTRA Indriasari Lydia Darmiyanti MARLIANA PUTRI Mochammad Risky Ramadhan PANDU ARIFIN TETUKO WAHYU JATMIKO