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Trimurtiningrum, Retno
Universitas 17 Agustus 1945 Surabaya, Surabaya
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Pengaruh Campuran Kawat Bendrat pada Karakteristik Beton dengan Subtitusi Fly Ash pada Nilai Slump Winarko, Edy; Trimurtiningrum, Retno; Sutriono, Bantot; Rochmah, Nurul
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 2 (2024): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i2.29371

Abstract

The increasing use of concrete in the construction world encourages massive exploitation of the environment that has limestone or karst reserves to be used as the main raw material for making cement, to reduce the excessive use of cement, a way is used to utilize fly ash as a substitute for part of the cement in the concrete mixture to reduce the negative impact of limestone mining activities as well as cement production which contributes a total of 9% of CO2 emissions on earth. In this study, bendrat wire will also be added to determine the workability of fresh concrete mixes. From the results of the study it was found that concrete with fly ash substitution without bendingt wire mixture got an average height of 10.7 cm, while the variation with the addition of bending wire at 3% decreased in the average slump value to 10 cm where the increasing percentage of bending wire made the average slump value go down, seen in the 6% and 9% variations which experienced a decrease in the average height of the slump with a height of 9.7 cm and 9 cm, this can have an impact on the workability of the concrete mix itself, with a higher percentage of bending wire will have difficulty when applying to building construction.
Pengaruh Penambahan Presentase Serbuk Kaca pada Karakteristik Beton Terhadap Nilai Slump Fadilla, Deska Vira; Trimurtiningrum, Retno; Sutriono, Bantot; Rochmah, Nurul
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 2 (2024): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i2.29375

Abstract

Concrete is the most commonly used construction material in the construction industry. Concrete has properties that are resistant to high pressure and extreme temperatures which allows wide use and according to needs. In this research, additional materials were used from glass waste which was processed into glass powder that passed through sieve No. 200. To find out additional characteristics, one of them is to know the effect of the slump value which is planned in accordance with SNI 03 – 2834 – 2000. This research uses the DOE (Department of Environment) method. The results of this research show that the average slump value of concrete aged 7 days, 14 days, and 28 days using glass powder percentages of 0%, 4.5%, 6.5% , 8.5%, and 10.5% are 12 cm, 12 cm, 10.33 cm, 9.83 cm, and 9.33 cm.
Analisis Perbandingan Perilaku dan Kinerja Struktur Baja Terbreis Eksentris Tipe Split K-Bresing dan Two Story X-Bresing Mazaruddin, Muh Fauzi; Trimurtiningrum, Retno
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 2 (2024): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i2.29883

Abstract

Pertumbuhan penduduk yang semakin pesat namun luas lahan yang semakin terbatas menjadi tantangan baru dalam zaman modernisasi saat ini. Alternatif yang dapat dilakukan dalam permasalahan ini yaitu dengan pembangunan bangunan bertingkat tinggi (highrise building). Dalam merancang bagunan bertingkat tinggi harus diperhatikan kestabilan struktur. Kestabilan struktur dapat di cek terhadap nilai simpanagn dan efek P-Delta. Kestabilan dapat diatasi dengan memberi pengaku (bresing). SRBE mempu memberikan perilaku daktail dan kekakuan elastik yang tinggi. Penelitian ini menganalisi perbandingan perilaku dan kinerja struktursystem eksentris Tow Story-X dan Split-K dengan menggunakan bantuan program SAP 2000. Hasil dari analisi diperoleh masa struktur bresing Tow Story-X 0,058% lebih ringan dari Split-K, untuk nilai simpangan dengan selisih kedua struktur adalah 1,9% dan nilai teta dengan selisih 2,1%
Analisis Kinerja Struktur Gedung Perkantoran Pabrik Pupuk Gresik dengan Pembebanan Gempa Berdasarkan SNI 1726:2019 terhadap Simpangan Antar Lantai dan Pengaruh P-Delta Muzaki, Achmad; Trimurtiningrum, Retno
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 3 (2024): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i3.30915

Abstract

Earthquakes are natural phenomena caused by natural events. The strength of an earthquake can be measured using a seismometer. The most commonly used scale to measure the strength of an earthquake is the Richter scale. The amount of demage caused by an earthquake is not only determined based on its strength, but is also measured by the area where the earthquake occurs. The depth of an earthquake that occurs from within the earth can also affect the potential damage. Eatrhquakes are located close to the groound surface, so they can have significant destructive properties. Large earthquake can usually trigger aftershocks, so they can be overcome using temporal processes.This research carried out an analysis of story drift and the influence of P-Delta on the reinforced concrete structure of the office building PT. Pupuk Lapan Harsa based on SNI 1726:2019. With the planning concept using the help of SAP2000 software.The results of the analysis of the Gresik fertilizer factory office building were delcared safe with a story drift in the x-axis ( ) in the amount of 10,95 mm up to 31,85, in the y-axis ( ) in the amount of 10,95 mm up to 31,85 mm. Meanwhile, the value of the influence of P-Delta in the x-axis ( ) in the amount of 0,007 up to 0,036, in the y-axis ( ) in the amount of 0,007 up to 0,036. Earthquakes are natural phenomena caused by natural events. The strength of an earthquake can be measured using a seismometer. The most commonly used scale to measure the strength of an earthquake is the Richter scale. The amount of demage caused by an earthquake is not only determined based on its strength, but is also measured by the area where the earthquake occurs. The depth of an earthquake that occurs from within the earth can also affect the potential damage. Eatrhquakes are located close to the groound surface, so they can have significant destructive properties. Large earthquake can usually trigger aftershocks, so they can be overcome using temporal processes.This research carried out an analysis of story drift and the influence of P-Delta on the reinforced concrete structure of the office building PT. Pupuk Lapan Harsa based on SNI 1726:2019. With the planning concept using the help of SAP2000 software.The results of the analysis of the Gresik fertilizer factory office building were delcared safe with a story drift in the x-axis ( ) in the amount of 10,95 mm up to 31,85, in the y-axis ( ) in the amount of 10,95 mm up to 31,85 mm. Meanwhile, the value of the influence of P-Delta in the x-axis ( ) in the amount of 0,007 up to 0,036, in the y-axis ( ) in the amount of 0,007 up to 0,036.
Pengaruh durasi pembakaran dan persentase abu sekam padi terhadap kuat tekan mortar Masruri, Mochamad Hafidh; Trimurtiningrum, Retno; Rochmah, Nurul
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 4 (2024): October
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i4.36776

Abstract

Cement is one of the main materials in mortar that has a negative impact due to its manufacture. Various new studies and innovations continue to be carried out to increase the utility value of waste and reduce the negative impacts of cement manufacture. One of the innovations is the use of rice husk ash as a substitute for cement in making mortar. It is known that rice husk ash has a high silica content where the content is the same as the content of cement. The duration of good burning of rice husk ash is 6 hours with normal burning. The percentage of rice husk ash used in the study was 0%, 5%, 10%, and 15% of the weight of cement. The test results showed that 10% rice husk ash with a burning duration of 6 hours used as a mortar mixture had the highest compressive strength value of 32.04 MPa.
Studi Perbandingan Kinerja Struktur Rangka Bresing Konsentrik Khusus dan Struktur Base Isolation Dengan Analisis Pushover Suprayitno, Wisnu Edi; Bantot Sutriono; Retno Trimurtiningrum
Jurnal Perencanaan dan Penelitian Teknik Sipil Vol 4 No 3 (2025): November
Publisher : Universitas Iskandar Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55616/prince.v4i3.1100

Abstract

Earthquakes are phenomena that have the potential to cause damage to building infrastructure, especially high-rise buildings. This condition is an important aspect in the planning of earthquake-resistant buildings, especially related to the use of building structural systems. The purpose of this study was to analyze the response and sismic performance between special concentric braced frame structures and base isolation structures in multi-storey buildings with height variations of 4 floors, 8 floors and 12 floors. Comparative analysis was conducted using ETABS V software.21 with reference to the provisions of the design of earthquake-resistant steel structures. The results of the analysis showed that the deviation between floors and P-Delta effect of base isolation structure is smaller than that of special concentric braced frame structure. From the analysis of pushover, both structures show the level of Life Safety (LS) performance, which means they are still in a safe condition to withstand earthquake loads without experiencing significant damage.
Pengaruh Variasi Bentuk Geometris Bata Beton Interlock Tipe Segitiga dan Lego terhadap Kekuatan Tekan Radinda, Aura Azafilia; Sutriono, Bantot; Trimurtiningrum, Retno
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.v5i3.3808

Abstract

This The demand for efficient and environmentally friendly building materials has driven the development of interlocking concrete blocks with various geometric shapes. This study aims to analyze the effect of geometric shape variations of interlocking concrete blocks Triangle and Lego types on compressive strength, using the Cube block as a control sample. The tests were conducted on samples measuring 5×5×5 cm. The results indicate that block geometry significantly affects stress distribution and failure patterns. Based on the test results, the Cube block (control) achieved the highest compressive strength of 66.69 Kg/cm², followed by the Lego block with 51.68 Kg/cm² Grade II, and the Triangle block with 47.26 Kg/cm² Grade III according to SNI 03-0349-1989 for concrete masonry units. These differences in compressive strength demonstrate that the more complex and taller the block geometry, the greater the stress concentration that reduces strength performance. The Cube block showed the most uniform load distribution, the Lego block exhibited moderate strength due to its interlocking system that enhances stability, while the Triangle block had the lowest strength due to its narrower load-bearing area. Therefore, a compact and well-proportioned geometric design, such as the Lego type interlock, proves to be more structurally efficient than the taller triangular form.
Pengaruh Letak dan Luas Void Terhadap Perilaku dan Kekuatan Struktur SRPMK Gedung 10 Lantai M. Ubaidil Fikri; Bantot Sutriono; Retno Trimurtiningrum
Reinforcement Review in Civil Engineering Studies and Management Vol. 5 No. 1 (2026)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/reinforcement.v5i1.7616

Abstract

Pesatnya perkembangan bangunan bertingkat di Kabupaten Sidoarjo dipicu oleh keterbatasan lahan serta meningkatnya kebutuhan ruang. Kondisi ini menuntut perencanaan struktur yang mampu menahan beban gempa, mengingat wilayah Sidoarjo berada di antara Sesar Surabaya dan Sesar Waru yang memiliki potensi gempa berkekuatan sekitar 6,5–7,0 magnitudo. Salah satu aspek yang turut memengaruhi respons struktur adalah keberadaan void atau bukaan pada pelat lantai, yang dapat mengubah distribusi massa dan kekakuan bangunan. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi luas dan letak void terhadap perilaku serta kekuatan struktur pada sistem Rangka Pemikul Momen Khusus (SRPMK) untuk gedung 10 lantai di Kabupaten Sidoarjo. Analisis dilakukan menggunakan software ETABS v.22 dengan lima variasi model, yaitu Gedung A tanpa void, serta Gedung B, C, D, dan E yang memiliki variasi luas dan letak void. Hasil analisis menunjukkan bahwa model Gedung D dan Gedung E memiliki kinerja perilaku struktur yang lebih optimal dibandingkan model lainnya. Hal ini ditunjukkan oleh nilai gaya geser dasar dan periode struktur yang lebih terkendali, sehingga menghasilkan simpangan antar lantai dan efek P-Delta yang lebih kecil. Kondisi tersebut terjadi karena distribusi kekakuan struktur yang lebih merata, sehingga tidak memicu ketidakberaturan yang signifikan. Sebaliknya, model Gedung B dan Gedung C cenderung mengalami penurunan kekakuan yang berdampak pada meningkatnya gaya geser dasar, periode struktur, simpangan, serta efek P-Delta, bahkan berpotensi memicu ketidakberaturan struktur. Dari segi kinerja kekuatan struktur, Gedung D dan E juga menunjukkan performa yang lebih baik, ditandai dengan nilai gaya dalam berupa momen, geser, dan torsi yang relatif lebih kecil pada balok induk, balok anak, maupun kolom. Dengan demikian, variasi void yang tepat dapat meningkatkan efisiensi dan kinerja struktur tanpa mengurangi tingkat keamanannya.
Analisis Optimalisasi Metode Curing terhadap Perilaku Mortar Geopolimer Berbasis Fly ash Nur Rahmawan, Fatih; Sutriono, Bantot; Trimurtiningrum, Retno
Jurnal Perencanaan dan Penelitian Teknik Sipil Vol 5 No 2 (2026): Juli
Publisher : Universitas Iskandar Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55616/prince.v5i2.1174

Abstract

Geopolymer is an environmentally friendly concrete based on pozzolanic materials rich in silica and alumina. The compound reacts with an alkali activator thru a polymerization process, resulting in binding properties. Geopolymer concrete generally requires an activation temperature of around 60℃ to enhance compressive strength, making it less practical for large-scale applications. Therefore, this study examines the most optimal room temperature curing method for the compressive strength of fly ash-based geopolymer mortar. The research uses 12M  and an activator ratio of :  of 1:1. The test specimens in the shape of cubes were cured using three methods: water curing, moist curing, and wrap curing. The compressive strength test was conducted at 7 and 28 days of age. The results show that at 7 days of age, water curing produced the highest compressive strength of 22.24 MPa. However, at 28 days of age, wrap curing produced the highest compressive strength of 47.09 MPa. This shows that wrap curing is capable of maintaining internal moisture and preventing water loss due to evaporation, thereby making the geopolymerization process more stable and forming a denser structure. Thus, wrap curing becomes the most optimal curing method because geopolymer does not require water as the main reaction component.Geopolymer is an environmentally friendly concrete based on pozzolanic materials rich in silica and alumina. The compound reacts with an alkali activator thru a polymerization process, resulting in binding properties. Geopolymer concrete generally requires an activation temperature of around 60℃ to enhance compressive strength, making it less practical for large-scale applications. Therefore, this study examines the most optimal room temperature curing method for the compressive strength of fly ash-based geopolymer mortar. The research uses 12M  and an activator ratio of :  of 1:1. The test specimens in the shape of cubes were cured using three methods: water curing, moist curing, and wrap curing. The compressive strength test was conducted at 7 and 28 days of age. The results show that at 7 days of age, water curing produced the highest compressive strength of 22.24 MPa. However, at 28 days of age, wrap curing produced the highest compressive strength of 47.09 MPa. This shows that wrap curing is capable of maintaining internal moisture and preventing water loss due to evaporation, thereby making the geopolymerization process more stable and forming a denser structure. Thus, wrap curing becomes the most optimal curing method because geopolymer does not require water as the main reaction component.
Co-Authors Aditya Rizkiardi Andaryati, Andaryati Andi Patriadi Arjuna Baqhis Umar Arrowrichta, Billy Bantot Sutriono Bantot Sutriono Bantot Sutriono, Bantot Billy Arrowrichta Dewi Hartini Caley Dini Nur Maulina Santi Fadilla, Deska Vira Fambudi, Ivan Oky Febry Fatmawati, Laily Endah Fitra Febrianno, Gebby Ramdhan Rizky Fitra, Gebby Ramdhan Rizky Fitriyati, Elfin Nur Gede Sarya, Gede Handriyadi, Mokhammad Rahisa Hanie Teki Tjendani Hartatik, Nurani Herry Widhiarto, Herry Hiasintus Bertus Watu M. Ubaidil Fikri Masruri, M. Hafidh Masruri, Mochamad Hafidh Mauludiyana, Gita Mazaruddin, Muh Fauzi Mazaruddin, Muhammad Fauzi Misrawi Misrawi Misrawi, Misrawi Moch. Ubaidillah Fatra Alrozzaqi Muhammad Fauzi Mazaruddin Muzaki, Achmad Nur Rahmawan, Fatih Nurul Rochmah Patriadi, Andi Radinda, Aura Azafilia Riyani, Muhammad Imron Shidiq Rizkiardi, Aditya Rochman, Ahmad Ainur Rohaniawan, Hario Walid Santi, Dini Nur Maulina Saves, Faradlillah Setiawan, Yusak Adi Suprayitno, Wisnu Edi Syaiful Anam Triayaska, Aviska Watu, Hiasintus Bertus Winarko, Edy