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Lydia Darmiyanti
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ANALYSIS OF LIGHTWEIGHT BRICK WASTE FOR PARTIAL SUBSTITUTION OF FINE AGGREGATE ON CONCRETE COMPRESSIVE STRENGTH IHSAN TAQWA; YONAS PRIMA ARGA RUMBYARSO; 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

The construction industry in Indonesia is experiencing a significant increase, fueled by government infrastructure development. Concrete is the material of choice as it is easy to use, economical and strong. However, excessive sand mining has a negative impact on the environment, including land degradation and pollution. The increase in construction has led to an increase in construction waste, which, if managed properly, can be profitable. Effective waste management is crucial to address environmental concerns and the utilization of waste lightweight bricks offers a cost-effective and efficient solution. Studies related to the use of waste lightweight bricks as a partial replacement for sand in concrete are highly relevant. The results of compressive strength testing on normal concrete at the age of 28 days obtained based on data analysis and discussion that has been presented in the previous chapter regarding the use of waste lightweight brick powder fibers with variations of 0%, 5%, and 10% are 439 kN (f´c 24.85 Mpa), while variation 1 of 10% lightweight brick powder waste reaches 344 kN (f´c 19.48 Mpa), and variation 2 of 15% lightweight brick powder waste reaches 308 kN (f´c 17.44 Mpa).
THE EFFECT OF GRANITE WASTE AS A FINE AGGREGATE SUBSTITUTION IN ASPHALT CONCRETE BINDER COURSE NIKO FITRIANDANA RINJOKO; YONAS PRIMA ARGA RUMBYARSO; 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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Roads play a crucial role in local economies, supporting the distribution of goods and the mobility of citizens, but are often damaged by heavy traffic loads, poor drainage and inadequate infrastructure. Asphalt pavement is a popular choice due to its durability and affordable construction costs. Building waste includes construction and demolition waste, containing recyclable to toxic materials. Management of this waste is effective to reduce costs and support industry sustainability, in Indonesia, granite stone waste is widely generated. Analysis of Marshall characteristics in AC-WC mixtures using granite stone powder as a substitute for filler with a variation of 30% 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 that meets specifications. The VFB test value of 28.27% does not meet the 2018 Bina Marga specifications. While the granite stone powder with a variation of 60% 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 that meets the specifications. Meanwhile, the VFB test value of 27.31% does not meet the 2018 Bina Marga specifications. The presentation results of the mix design on cement filler are hot bin I by 17%, hot bin II by 45%, hot bin III by 32%, cement filler 6%, asphalt 6%.
ANALYSIS OF BUILDING BEAMS CALCULATION FOR EMPLOYEE MESS IN KONAWE SOUTHEAST SULAWESI GIFTY CAHYANI; LYDIA DARMIYANTI; 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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Buildings are certainly planned with the concept of earthquake-resistant buildings. In this research, the author concentrates on one of the structural elements, namely the beam which is reviewed for its structural behavior, by calculating the earthquake area to analyze the beam reinforcement. The analyzed building is located in Sulawesi, the building structure used is a reinforced concrete structure, analyzing only the upper structure, and not analyzing the lower structure which refers to the Indonesian National Standard Regulations including SNI 1726-2019 concerning Procedures for Earthquake Resistance Planning for Building and Non-Building Structures, SNI 2847-2019 concerning Structural Concrete Requirements for Buildings, and SNI 1727-2020 concerning Minimum Design Loads and Criteria. In this final project, structural modeling and analysis were carried out using Etabs20 software. From this study, the largest internal force on the structure of the employee mess building in Konowe, Beam (200x400) on the 2nd floor, with a maximum moment value of 111.554 kNm and a maximum field moment of 53.1946 kNm, shear force of 100.6759 kN. Based on the force in the Etabs output, the beam (200x400) requires 5-D16 pedestal top reinforcement, 3-D16 pedestal bottom reinforcement, 2-D16 top field reinforcement, 3-D16 bottom field reinforcement, D10-100 pedestal stirrup, D10-125 field stirrup. The reinforcement calculation is in accordance with SNI 2847-2019. It is recommended to compare the results of the ETABS analysis with the results of manual calculations based on SNI 2847: 2019. This comparison will provide an overview of the accuracy and reliability of ETABS software in calculating the reinforcement ratio.
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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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.
THE EFFECT OF USING RUBBER SEED WASTE ON K-300 COMPRESSIVE STRENGTH TEST (f’c 25 MPa) MUHAMMAD JAMALUDIN; GALI PRIBADI; 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

Modern construction technology has evolved with the principle of environmental concern through various innovations that support environmentally friendly construction. This includes the use of natural materials, procedures that minimize the use of hazardous resources, and techniques that produce minimal waste. The industry is also faced with the challenge of increasing demand for building materials due to population growth, which is addressed by utilizing local resources and waste, such as rubber seed shells as an alternative to conventional materials. The history of rubber use in Indonesia began with the introduction of seeds by Henry A. Wickham in 1876, with further development in the late 19th century. Based on the results of the research that has been conducted and the discussion in the previous chapter regarding the variation of the use of rubber seed shell waste of 0%, 5%, and 10%, the following conclusions can be drawn: The results of the ordinary concrete compressive strength test at the age of 28 days reached 440 kN (fc'24.91 Mpa), while variation 1 of 5% rubber seed waste reached 317 kN (fc' 17.95 Mpa), and variation 2 of 10% rubber seed waste reached 274 kN (fc'15.51 Mpa).
IDENTIFICATION OF CAUSING FACTORS FOR THE NON-APPLICATION OF SMK3 BASED ON ISO 45001 CLAUSES 6,7,8 AT PT X IN 2024 RIZKI HERWANSYAH; LYDIA DARMIYANTI; 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

Occupational Safety and Health Management is the process of controlling risk and creating a safe and productive work environment which is a component of the company's management system. Factors that hinder companies from implementing SMK3 in accordance with ISO 45001 are the lack of support from management to implement SMK3 and safety officers who are not competent in their fields. This study is a descriptive qualitative study where data collection is carried out directly on workers, in-depth interviews and filling out questionnaires, with a research sample of 18 respondents. The results of the study showed that the company had not implemented SMK3 based on ISO 45001, from the results of observations, interviews and filling out questionnaires. Respondents on average did not know more about SMK3, because safety officers did not socialize the K3 policy regarding SMK3 in accordance with ISO 45001. The company must conduct general K3 expert training and other training related to K3 for safety officers so that officers are competent, and provide more support from management and others so that SMK3 can be implemented in the company
Analisis Kinerja Struktur Gedung Rusun TNI AU Halim Perdanakusuma Dengan Menggunakan Metode Pushover Analysis Prima, Yonas; Lydia Darmiyanti
Jurnal Sipil Krisna Vol 9 No 2 (2023): Jurnal Sipil Krisna
Publisher : Fakultas Teknik Universitas Krisnadwipayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61488/sipilkrisna.v9i2.418

Abstract

At this time, planning for earthquake-resistant multi-storey buildings in Indonesia is important because Indonesia is in a very active tectonic zone, a position caused by the meeting of the 3 large plates and 9 small plates of the world & forming complex plates meeting paths, this makes Indonesia a countries vulnerable to earthquakes. One method of analytical approach for the performance of earthquake-resistant reinforced concrete structures is push load analysis which is used to reveal the performance of building structures during an earthquake by presenting them using performance levels according to regulations, so this planning is usually called performance-based earthquake resistant planning. The performance level will indicate the collapse behavior of the building during an earthquake according to existing conditions. Pushover analysis & performance evaluation on vertical and horizontal elements is assisted by ETABS software. The results of the pushover analysis show that the performance point of the rusun TNI AU Halim Perdanakusuma building for loading in the X-direction is 440.471 mm with a shear force of 38363.2261 kN, while for the Y-direction the performance point obtained is 457.276 mm with a shear force of 55150.5802 kN. From the performance point, the structural drift resulting from loading in the X-direction and Y-direction is 0.824% & 0.855%, so the structure's performance level is based on the drift limits required by FEMA 356 and ATC-40 including the direct occupancy level. Based on the capacity curve, the maximum base shear force obtained is 46734.5513 kN & the resulting displacement in the X- direction is 710.310 mm & while in the Y-direction, the maximum base shear force obtained is 76055.6401 kN & the resulting displacement is 904.504 mm.
THE USE OF WASTE BAMBOO PIECES AS A PARTIAL SUBSTITUTION OF COARSE AGGREGATES TO INCREASE THE COMPRESSIVE STRENGTH OF CONCRETE MUHAMMAD ARDIYAN DENYADI; LYDIA DARMIYANTI; INDRIASARI
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

Utilizing waste as an alternative building material is becoming an effective solution to environmental problems and is popular in developing countries. On the other hand, the concrete industry, a key component of construction, continues to innovate to improve quality and efficiency. The increasing demand for concrete is driving the development of mix designs that meet stringent quality and compressive strength standards, while taking into account environmental sustainability. Advances in concrete technology spur research initiatives to improve its quality and efficiency of use, with innovations in material selection and execution methodologies. This is aimed at meeting the increasing needs and overcoming construction challenges. Modern concrete is required to perform optimally in less time, requiring effective additives for performance enhancement. Recent research has integrated bamboo waste from the handicraft industry as a component of concrete mixes, increasing the speed of project execution and providing a sustainable solution in waste management. The authors were interested in conducting an in-depth study on improving the compressive strength of concrete by integrating waste bamboo pieces. The concrete studied had a f´c strength of 25 MPa (K-300) and was tested at 7, 14, and 28 days to assess the effectiveness of bamboo as an additive. The test results are expected to provide significant data on the viability of bamboo waste as a partial substitution for coarse aggregate. The title of the study, “Use of Waste Bamboo Pieces as Partial Substitution for Coarse Aggregate to Increase the Compressive Strength of Concrete,” reflects the objectives of the study and the utilization of sustainable materials in modern construction. Based on the results of the research that has been carried out and the discussion in the previous chapter with the variation of waste bamboo pieces 0%, 10% and 15%, the following conclusions can be drawn: the results of testing the compressive strength of normal concrete at the age of 28 days reached 452 kN (fʹc 26, 1 MPa = 104%), while variation 1 of 10% rolled bamboo cuttings waste decreased in compressive strength, reaching 305 kN (fʹc 17.60 MPa = 70%), and variation 2 of 15% rolled bamboo cuttings waste decreased, reaching 309 kN (fʹc 17.83 MPa = 71%).
EFFECT OF COMPRESSIVE STRENGTH OF CONCRETE WITH PARTIAL SUBSTITUTION OF FINE AGGREGATES WITH WASTE BAMBOO FIBERS RAZAK MOHAMADHAN; GALI PRIBADI; LYDIA DARMIYANTI
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.
ANALYSIS OF THE USE OF ZEOLITE AS A SUBSTITUTE FOR SOME OF THE COARSE AGGREGATE IN POROUS CONCRETE TEGUH SIANTURI; LYDIA DARMIYANTI; INDRIASARI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Rapid urban development increases water runoff due to impervious areas. Porous concrete is an environmentally friendly solution because it absorbs water and preserves groundwater. This study examines the use of porous zeolite as a partial substitute for coarse aggregate to improve the mechanical and environmental performance of porous concrete, particularly in areas with light traffic and sustainable water management requirements. The compressive strength of concrete with 0% zeolite stone composition reached 18.66 MPa (7 days), 22.60 MPa (14 days), and 25.60 MPa (28 days), exceeding all SNI 2847:2019 requirements. The compressive strength of concrete with 15% zeolite stone reached 16.06 MPa (7 days), 20.82 MPa (14 days), and 22.18 MPa (28 days), but none of them met the minimum limit of SNI 2847:2019. The compressive strength of concrete with 30% zeolite aggregate reached 16.07 MPa (7 days), 20.83 MPa (14 days), and 22.20 MPa (28 days), but none of them met the minimum standard of SNI 2847:2019.
Co-Authors Bagus Rizal Kasmana DANANG ARIS MUNANDAR Gali Pribadi GIFTY CAHYANI Gita Puspa Artiani IHSAN TAQWA Indriasari MUHAMMAD ARDIYAN DENYADI Muhammad Jamaludin NIKO FITRIANDANA RINJOKO RAZAK MOHAMADHAN RIZKI HERWANSYAH Sahat Martua Sihombing TEGUH SIANTURI Yonas Prima Arga Rumbyarso