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All Journal REKA RACANA Rekayasa Sipil JHP17 (Jurnal Hasil Penelitian) RACIC : Rab Construction Research EXTRAPOLASI: Jurnal Teknik Sipil axial : jurnal rekayasa dan manajemen konstruksi Portal: Jurnal Teknik Sipil Jurnal Teknik Sipil dan Teknologi Konstruksi Pawon: Jurnal Arsitektur Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Jurnal Teknik Industri Terintegrasi (JUTIN) DEVICE Extrapolasi Jurnal Teknik Sipil Jurnal Sains dan Teknologi Journal of Scientech Research and Development Student Scientific Creativity Journal Journal of Planning and Research in Civil Engineering Jurnal Teknik Sipil Senadika
Nurul Rochmah
Program Studi Teknik Sipil Fakultas Teknik UNTAG Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation Other

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Perbandingan Desain Lug Groove dan Dovetail pada Bata interlock Terhadap Kuat Tekan Augdrie, May Haidar; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3770

Abstract

The main problem in conventional wall construction lies in the limited compressive strength of clay bricks and the low efficiency of installation, both of which negatively affect structural performance and overall construction productivity. Conventional masonry also exhibits high variability in quality, making it less reliable for modern construction demands. Although interlocking concrete bricks have been introduced as an alternative solution to improve installation efficiency, the influence of interlocking geometric variations on compressive strength has not been examined comprehensively, particularly for Lug Groove and Dovetail configurations. This study aims to analyze the effect of these two interlocking geometries on the compressive strength of concrete bricks and to evaluate their conformity with the Indonesian standard SNI 03-0349-1989. The research was conducted using an experimental quantitative approach in a laboratory setting. Concrete brick samples were cast using wooden molds with two different interlocking geometries, namely Lug Groove and Dovetail. All specimens underwent a 7-day curing process prior to testing with a Compression Testing Machine (CTM). The maximum load sustained by each specimen was recorded and used to calculate compressive strength following the SNI formula, and the values were then converted into kg/cm² units. The results indicate that both interlock types fall into the solid concrete brick quality class II according to SNI. The average compressive strength of Lug Groove bricks was 43.99 kg/cm², while the Dovetail type reached 44.88 kg/cm². The difference between the two designs is relatively small, suggesting that geometric variation has only a limited effect on compressive strength. Nevertheless, both designs exhibit satisfactory mechanical performance and meet technical quality standards, making them suitable alternatives for efficient wall construction.
Perbandingan Bata Interlock Desain Keylock Brick dan Multi Gridlock terhadap Kuat Tekan Amanda, Rachel; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3771

Abstract

The primary problem in using conventional red bricks as wall materials lies in their low construction efficiency, high dependence on mortar, and inconsistent structural quality, which makes them less suitable for modern construction demands that require speed, accuracy, and sustainability. These limitations create a strong need for innovative building materials capable of improving mechanical performance while enhancing construction efficiency. This study aims to analyze the influence of interlocking geometry variations in concrete bricks, specifically the Keylock Brick and Multi Gridlock types, on compressive strength, and to compare their performance with conventional red bricks to determine the most structurally optimal design. The research employs a quantitative experimental approach, where specimens are produced based on the predetermined geometric designs. Compressive strength tests are conducted using a Compression Testing Machine (CTM) to measure the maximum applied load. Data analysis is performed descriptively and comparatively based on the surface area and compressive strength values obtained from each sample. The results indicate that interlocking geometry significantly affects compressive strength performance. The Keylock Brick type achieves an average compressive strength of 100.03 kg/cm², classified as a solid concrete brick of quality level I according to SNI 03-0349-1989. Meanwhile, the Multi Gridlock type records an average compressive strength of 60.48 kg/cm², categorized as a hollow concrete brick of quality level II. Both values are higher than that of conventional red bricks, which average 31.68 kg/cm². These findings demonstrate that optimizing interlocking geometry can substantially enhance the structural performance of concrete bricks, offering a more efficient and sustainable alternative for modular construction applications
Pengaruh Penggunaan Limbah Beton K-350 sebagai Pengganti Agregat Kasar terhadap Nilai Slump Hartono, Chisa Kurniawan; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3781

Abstract

The development of construction technology in the era of globalization has progressed very rapidly, but on the other hand, it has also increased the amount of construction and demolition waste that has not been handled optimally. Waste from ready-mix concrete testing is one type of waste that has the potential to be reused as an alternative construction material. This study aims to determine the effect of using crushed stone from ready-mix concrete waste as a substitute for coarse aggregate on the workability properties of concrete as seen from the slump value. The concrete mix design method used in this study refers to the Department of Environment (DoE) method in SNI 03-2834-2000 with a planned concrete strength of 29 MPa. The test specimens were cylindrical concrete with 0% and 100% substitution of coarse aggregate using crushed concrete waste from the compressive strength test of K-350 concrete from PT Merak Jaya Beton. The slump test was carried out to assess the level of concrete mixture workability in each mix. The test results show that the slump value of concrete using coarse aggregate from concrete waste is still within the allowable range for structural works such as slabs, columns, and beams, which is 7.5–15 cm. The average slump value obtained was 13.86 cm, indicating that the concrete mixture still has good workability and can be easily applied in the field. Thus, the use of crushed concrete waste as a 100% substitute for coarse aggregate is still possible to be used in structural concrete mixtures in terms of workability.
Pengaruh Serbuk Batu Kapur di Daerah Semanding Tuban sebagai Variasi Bahan Substitusi Semen terhadap Nilai Slump Tirani, Aksaradia Sang; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3785

Abstract

The massive use of concrete in the construction industry presents significant environmental challenges, particularly due to the high consumption of cement. Cement is a material that contributes substantially to global carbon dioxide (CO₂) emissions. According to data from the Chatham House Research Institute, global cement production in 2016 generated approximately 2.2 billion tons of CO₂, equivalent to 8% of total global carbon emissions. This condition indicates the need for efforts to increase efficiency in cement use through innovations in concrete mixtures, including the utilization of substitute materials such as limestone powder. This study aims to evaluate the slump values of concrete with various limestone powder substitution percentages using the Design of Experiment (DoE) method for mix design and the SNI 1972:2008 “Concrete Slump Test Method” as the testing standard. The analysis technique was carried out by measuring the height of fresh concrete before and after being placed into the Abram cone to obtain the slump value as an indicator of workability. The results show that the slump values for the 0%, 5%, 10%, 12.5%, 15%, and 35% variations were 18 cm, 16 cm, 15.75 cm, 11.5 cm, 12.5 cm, and 12 cm, respectively. The highest slump was obtained at the 0% variation, while the most optimal slump was found at the 12.5% variation with a value of 11.5 cm, as it lies within the ideal range—not too fluid, which risks segregation, and not too stiff, which complicates compaction. This study demonstrates that the addition of limestone powder at certain levels can significantly influence concrete workability.
Pengaruh Serbuk Batu Kapur Sampang Madura sebagai Subtitusi Semen terhadap Slump Beton Santoso, Dwi Prima; Sutriono, Bantot; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3809

Abstract

Madura, particularly the Sampang region, possesses significant reserves of carbonate minerals, notably limestone. The utilization of this local material as a construction element holds substantial potential, but requires investigation into how the substitution and addition of pulverized limestone affect the critical properties of concrete. This study focuses on the problem of how a combined 50% substitution of coarse aggregate with Sampang limestone and the incremental addition of pulverized limestone as an additive influences the workability of fresh concrete. The primary objective of this research is to evaluate and determine the effect of incremental percentages of Sampang pulverized limestone additive (0%, 5%, 10%, 15%, and 20%) on concrete workability, quantified by the slump test, for a concrete mix that already utilizes a 50% coarse aggregate substitution with limestone, aiming to identify the optimal composition. The methodology employed in this study is laboratory-based experimentation. The analytical technique applied is descriptive statistical analysis to compare the average slump values resulting from the variations in additive composition. The baseline concrete mix comprised a 50% substitution of coarse aggregate with limestone. Subsequently, the pulverized limestone powder was added at the predetermined additive percentages. The results indicate that the baseline mix (50% limestone substitution with 0% additive) yielded an average slump of 16.7 cm. The highest average slump value of 17.3 cm was recorded when the 50% substitution mix was further enhanced by a 5% additive composition. Conversely, increasing the additive proportion beyond 5% consistently reduced the slump, achieving the lowest workability of 15.0 cm at the 20% additive level. These findings suggest that the inclusion of 50
Pengaruh Gradasi Agregat terhadap Kuat Tekan dan Permeabilitas pada Beton Porus Hamzah, Muhammad Syafrie; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3810

Abstract

Pervious concrete is designed with open pores to allow water to flow through the concrete structure, unlike conventional concrete which is impermeable. This concrete is effective in stormwater management and groundwater recharge, making it an ideal choice for urban sidewalks. This study aims to analyze the effect of aggregate gradation on the compressive strength, permeability, porosity, and absorption of pervious concrete. The method used follows the ACI 522 R-10 mix design. The test results show that gradation A (5-10 mm) has the best compressive strength of 9.24 MPa, the lowest permeability of 0.23 cm/s, porosity of 23.57%, and absorption of 12.96%. Gradation B (10-15 mm) results in a compressive strength of 7.20 MPa, permeability of 0.38 cm/s, porosity of 27.81%, and absorption of 7.86%. Meanwhile, gradation C (15-20 mm) shows the lowest compressive strength of 5.92 MPa, permeability of 0.30 cm/s, the highest porosity of 36.31%, and absorption of 9.80%. Larger aggregate gradation increases permeability and porosity but decreases compressive strength.
Pengaruh Pasir Batu Kapur Sampang Madura sebagai Agregat Halus terhadap Slump Beton Gono, Theresia Kristanti; Sutriono, Bantot; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3811

Abstract

Concrete is one of the most widely used construction materials, with aggregates forming the largest portion of its total volume. The growing demand for natural aggregates encourages the exploration of alternative materials that are more sustainable and locally available. Limestone from the Sampang–Madura region is considered a potential aggregate substitute, although its distinct physical characteristics require detailed investigation. This study examines the effects of incorporating limestone as a 50% replacement for coarse aggregate and as a fine aggregate substitute at variations of 0%, 5%, 10%, 15%, and 20%. Experimental testing was carried out using cylindrical specimens measuring 15×30 cm with a target strength of f’c 25 MPa. The tests included slump testing,. The results indicate that replacing fine aggregates with up to 20% limestone still meets the required slump range, although mixtures with substitutions of 10% or more show reduced workability due to the high absorption capacity of limestone, which affects the water–cement ratio. Overall, the findings demonstrate that local limestone can serve as a viable aggregate substitute, reducing dependence on natural aggregates while supporting environmentally sustainable construction practices.
Pengujian Slump Beton Alir dengan Penggunaan Serbuk Batu Kapur sebagai pengganti Semen Napa, Marniantu Helena; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 5 No. 3 (2025): September-Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v5i3.3816

Abstract

This study aims to analyze the effect of using limestone powder as a partial replacement for cement on the slump value of flowing concrete. The limestone powder substitution was applied in variations of 0%, 5%, 9%, 10%, and 15% of the cement weight to observe changes in the fresh properties of the concrete. The slump test was carried out according to standard methods for flowing concrete to evaluate the workability and flowability of the mixture. The test results showed that the addition of limestone powder with fine particle size was able to increase the slump value because it acts as a filler that improves particle packing and reduces inter-particle friction. However, at substitution levels above the optimum limit, a tendency for segregation began to appear, resulting in reduced mixture stability. Overall, limestone powder can be used as a cement substitute in flowing concrete as long as its percentage is controlled to ensure it still meets the required workability standards.
Pengaruh Pengunaan Abu Ampas Kopi sebagai Bahan Subtitusi Semen pada Beton Pori Saputra, Yusaq Bahyu; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4633

Abstract

Pervious concrete is a material with open voids that allow water to flow through, making it highly effective in reducing surface runoff and increasing groundwater infiltration in urban areas. Pervious concrete, also known as porous concrete, is an innovative material designed with open pores that allow water to pass through its structure, making it a potential solution for mitigating surface runoff and enhancing groundwater infiltration in urban areas. This study focuses on the sustainable utilization of coffee waste by using coffee grounds ash as a cement substitute in environmentally friendly pervious concrete. In addition to producing environmentally friendly concrete, this study also provides an effective alternative for reducing organic waste. The study aims to analyze the effect of using coffee grounds ash as a partial cement replacement on the compressive strength of concrete, while simultaneously providing an innovative solution for the utilization of coffee waste by incorporating coffee grounds ash as a cement substitute in pervious concrete, specifically at cement replacement levels of 0%, 2,5%, 5%, and 7,5%. The concrete mix design was prepared according to the ACI 522R-10 method. Test results indicated that the 0% and 2,5% replacement levels produced a compressive strength of 5,91 MPa, while the 5% and 7,5% levels produced 4.43 MPa at 7 days, demonstrating that lower replacement levels provide higher compressive strength compared to higher replacement levels.
Pengaruh Pemanfaatan Limbah Batu Onyx sebagai Subtitusi Agregat Kasar Terhadap Beton Porus Utomo, Rendy Cahyo; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4650

Abstract

Conventional concrete, which is impermeable in nature, can increase surface runoff and cause water ponding problems. Therefore, an alternative construction material that supports better drainage systems is required. One potential solution is porous concrete utilizing waste onyx stone as a partial replacement for coarse aggregate.This study aims to analyze the effect of using waste onyx stone as a substitute for coarse aggregate on the compressive strength and permeability of porous concrete.The research method used was a laboratory experimental method with variations of waste onyx stone substitution of 0%, 50%, 75%, and 100% of the total coarse aggregate. The tests conducted included material characteristic testing, compressive strength testing at 7 and 28 days, and permeability testing of porous concrete.The results showed that the use of waste onyx stone affected the compressive strength and permeability of porous concrete. At 7 days, the 0% variation produced the highest compressive strength of 5.91 MPa, while the 100% variation produced the lowest value of 4.25 MPa. At 28 days, the highest compressive strength was obtained in the 0% variation at 10.35 MPa, while the lowest was in the 100% variation at 4.62 MPa. The permeability test results showed an increase from 0.36 cm/s in the 0% variation to 0.60 cm/s in the 100% variation. The higher the substitution of waste onyx stone, the higher the permeability value, while the compressive strength tended to decrease.
Co-Authors ACH. BARIZI Achmad ihza Mahendra Achmad Sa'roni Amalia, Taris Rizka Amanda, Rachel Arifin, Moch.Ali Arsasuta, Faris Augdrie, May Haidar Bantot Sutriono Bantot Sutriono Bantot Sutriono, Bantot Beoang, Conrad Esguerra Jordy Budy Wiryawan Devangga, Ramadhan Azzahdewa Dewi Pertiwi Dimas Permana Dwijayanto, Pebru Fadilla, Deska Vira Fadillah, Zebina Hiya Reksa Fambudi, Ivan Oky Febry Feriansyah Maulana Ahsan Firmansyah, Mochamad FIRMANSYAH, MOCHAMMAD Gede Sarya Gede Sarya, Gede Gono, Theresia Kristanti Hamzah, Muhammad Syafrie Haqq, Mohammad Ivan Hari Sapto Wibowo Hartono, Chisa Kurniawan Herry Widhiarto Hilda Agnes Janwarin Irfan, Muhammad Andy Jhoni Setiawan Kusuma, Priba Dwi laily endah fatmawati Lukmansyah, Indra Mahanani, Aulia Bintang Masruri, Mochamad Hafidh Mathias, Leonardo Mauludiyana, Gita Michella Beatrix Moch. Ubaidillah Fatra Alrozzaqi Napa, Marniantu Helena Prasetia, Mohamad Adi Pratama, Eza Dafa Putra, R. Firdaus Alamsyah R. Arco Hermawan Brahmassetyo Ramadhan, M. Fathin Retno Trimurtiningrum Santoso Nugroho Santoso, Dwi Prima Saputra, Yusaq Bahyu Saputri, Denis Tiyas Ayu Sari, Tri Saves, Faradlillah Teguh Listiko Wijaya Tirani, Aksaradia Sang Trimurtiningrum, Retno Tzu-Ying Lee Utomo, Rendy Cahyo Wahyu Pamungkas, Hegar Winarko, Edy