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Journal : Multicience

ANALYSIS OF HEAVY EQUIPMENT PERFORMANCE ON THE PROBOLINGGO-BANYUWANGI TOLL ROAD PROJECT KM SECTION KM 09 + 125 TO KM 09 + 725 BILHAN GAMALIEL HARTANTO; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 03 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Infrastructure projects, especially in flexible pavement works, are highly dependent on the utilization of heavy equipment. The use of such heavy equipment is an important element that determines the success of asphalt road construction, with the production capacity of heavy equipment being a major factor in the progress of project implementation. Therefore, the analysis of production volume capacity is very important. This study aims to determine the production volume capacity of construction works on the Probolinggo - Banyuwangi Toll Road KM 09+125 to KM 09+725, including an analysis of the capacity of asphalt finisher, dump truck, pneumatic tire roller, and tandem roller. The volumetric method was applied in this study to calculate the volume capacity and productivity of heavy vehicles. The results of the analysis showed that the calculated volume and productivity of the heavy equipment had met the target according to the planned schedule.
UTILIZATION OF WASTE PETUNG BAMBOO PIECES AS PARTIAL SUBSTITUTION OF COARSE AGGREGATE TO IMPROVE COMPRESSIVE STRENGTH OF CONCRETE DOHAR SINABUTAR; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 03 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2024
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 increasing the compressive strength of concrete by integrating waste bamboo pieces. The concrete under study has the following grades f´c 25 MPa (K-300) and 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 conclusions can be drawn, namely as follows the results of compressive strength testing on normal concrete at the age of 28 days reach 452 kN (fʹc 26,1 MPa = 104%), while variation 1 of 10% waste bamboo cuttings experienced a decrease in compressive strength, reaching 305 kN (fʹc 17,60 MPa = 70%), and variation 2 15% waste bamboo cuttings decreased, reaching 309 kN (fʹc 17.83 MPa = 71%).
ANALYSIS OF CONCRETE COMPRESSIVE STRENGTH AGAINST BAMBOO FIBER WASTE FARHAN HAWARI; GALI PRIBADI; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Concrete is a primary construction material consisting of a mixture of cement, water, sand, and aggregate, and often includes additives to improve specific properties such as workability, durability, and setting time (McCormac, 2004). Bamboo fibers, which have a compressive strength of 45.4 MPa (Afdal, 2016) and contain hydroxyapatite (HA), are used as an additive in concrete to improve performance. This study tested the compressive strength of normal concrete and concrete with bamboo fiber variations of 2%, 4%, and 6% at ages of 7, 14, and 28 days, each with two samples per variation (total of 24 test specimens). The test results showed that at 7 days, the 6% variation exhibited the highest compressive strength increase (20.42 MPa) compared to normal concrete (16.37 MPa). However, at 14 and 28 days, only the 6% variation again showed an increase in compressive strength (22.64 MPa), while the 2% and 4% variations tended to decrease compared to normal concrete.
THE USE OF BLACK BAMBOO AS A SUBSTITUTE FOR COARSE AGGREGATE TO INCREASE CONCRETE COMPRESSIVE STRENGTH Dohar Sinabutar; Yonas Prima Arga Rumbyarso
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

The use of waste as an alternative building material is 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 has driven the development of mix designs that meet strict quality and compressive strength standards, while also considering environmental sustainability. Advancements in concrete technology are driving research initiatives to improve the quality and efficiency of its use, with innovations in material selection and implementation methodologies. This aims to meet increasing demands and address construction challenges. Modern concrete is required to perform optimally in shorter timeframes, necessitating effective additives for performance enhancement. Recent research has integrated bamboo waste from the craft industry as a concrete mixture component, accelerating project implementation and providing a sustainable solution for waste management. The author is interested in conducting an in-depth study on increasing the compressive strength of concrete by integrating bamboo waste. The concrete studied has a quality of f´c 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 substitute for coarse aggregate. The study title, “The Use of Bamboo Waste as a Partial Substitute for Coarse Aggregate to Enhance Concrete Compressive Strength,” reflects the research objectives and the utilization of sustainable materials in modern construction. Based on the results of the research conducted and the discussion in the previous chapter with variations of black bamboo waste at 0%, 10%, and 15%, the following conclusions can be drawn: the compressive strength test results for normal concrete at 28 days reached 452 kN (fʹc 26.1 MPa = 104%), while variation 1 with 10% black bamboo waste showed a decrease in compressive strength, reaching 305 kN (fʹc 17.60 MPa = 70%), and variation 2 with 15% black bamboo waste also showed a decrease, reaching 309 kN (fʹc 17.83 MPa = 71%).
UTILIZATION OF GYPSUM POWDER WASTE AS A SUBSTITUTE FOR PART OF CEMENT IN POROUS CONCRETE COMPRESSIVE STRENGTH AGA PRIATNA; YONAS PRIMA ARGA RUMBYARSO; GALI PRIBADI
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

Porous concrete is used in infrastructure projects that require water absorption, supporting green cities and sustainable development. Its composition differs from conventional concrete because it has minimal or no fine aggregates, thus forming pores. This study aims to compare the compressive strength of normal porous concrete with porous concrete in which some of the cement is replaced with gypsum board waste powder. Testing was conducted at 7, 14, and 28 days to determine the effect of waste on concrete strength development. Compressive strength testing of porous concrete with varying amounts of gypsum powder waste showed that at 0% composition, the results at 7 and 14 days met the SNI 1974: 2011 standard. However, at 5% and 10% composition, the results at 7 days only partially met the standard, while at 14 days they were below the minimum limit of 88%. This indicates a decrease in compressive strength performance as the percentage of gypsum waste increases.