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KAJIAN KARBONASI PADA BETON MUTU TINGGI MEMADAT MANDIRI DENGAN VARIASI KOMPOSISI METAKAOLIN Wibowo Wibowo; Endah Safitri; Delista Putri Deni
Jurnal Riset Rekayasa Sipil Vol 4, No 1 (2020): September 2020
Publisher : Civil Engineering Study Program, Engineering Faculty Universitas Sebelas Maret

The construction industry is an important thing to support the development of a country. In concrete construction, quality, strength, and durability of concrete are the main requirements of all. In urban tropical countries, carbonation is one of the essential factors that affect the durability of concrete, and it may cause corrosion of reinforced steel in concrete. Therefore, high strength self-compacting concrete may be expected as the solution, improved by pozzolanic additions, metakaolin with substitution dosage at 10%; 12,5%; 15%; 17,5%; and 20%. This study purposed to determine the effect of metakaolin and its optimum dosage to improve high strength self-compacting concrete quality on its carbonation rates. This study was done by using experimental methods. It needs a plain cylindrical concrete with 75 mm diameter and 150 mm height, and testing by SNI 03-6468-2000, EFNARC 2002, and SEM-PUPR 25-2015. The carbonation test is done using accelerated laboratory carbonation in Structures and Materials Laboratory, Faculty of Engineering, Universitas Sebelas Maret by soaking the specimens in a 4% carbonate solution for 15 days, 37 days, and 51 days, proceeded by splitting using CTM, and spray it using a 1% phenolphthalein indicator to determine its carbonation depth. Based on the results, metakaolin might improve concrete quality by reducing its carbonation rates by 15% substitution dosage of cement content, with a nominal atmospheric carbonation coefficient 3,71 mm/year½, reduced 44,41% from HSSCC without metakaolin substitution. Metakaolin addition might reduce fresh concrete's workability and fulfill self-compacting concrete requirements specified by EFNARC 2002.

Efektivitas Dinding Sandwich Panel dan Precast ACC Panel Terhadap Biaya dan Waktu Kholis Hapsari; Ardia Tiara Rahmi; Delista Putri Deni
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 6 No. 2 (2023): DECEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v6i2.5126

Project delays in construction development have a major impact, especially on costs. Projects that experience delays in implementation will require large costs. One of the delay factors is caused by material selection, especially for wall materials. Precast AAC Panel wall and sandwich panel walls are current wall material innovations, but both differ in material composition, implementation method, and price. This research aims to analyze the effectiveness of the two types of walls in terms of cost and time. The research will use objects from the 24-story Sudimaran Forestwalk apartment development in South Tangerang. The research method uses quantitative methods by making a cost budget plan obtained from data on work volume, productivity, and unit price of work. Next, analyze the duration of work from productivity data and work volume. The analysis results for the budget for work costs using precast AAC panel materials cost IDR 11,640,163,103, while sandwich panel walls are IDR 16,223,117,608. For comparison of implementation time, precast AAC panel walls are faster, with a work duration of 623 days, and sandwich panel walls 784 days. From these price results, AAC panel walls are 23% cheaper than sandwich panel walls. Due to the low strength, the sandwich panel walls are sometimes damaged during construction, resulting in longer construction times. The analysis results show that precast AAC panel walls are more recommended as the choice of wall type in terms of cost and implementation time.

Penetrasi dan Sorptivitas Klorida Beton Mutu Tinggi Memadat Mandiri dengan Variasi Substitusi Metakaolin Deni, Delista Putri; Alfianarrochmah, 'Ilma; Kurnianingsih, Oktavia
Jurnal Teknik Sipil dan Lingkungan Vol. 8 No. 2: Agustus 2023
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University and The Institut of ENgineering Indonesia (PII), Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.8.02.115-126

Struktur beton bertulang seringkali terekspos pada lingkungan yang mengandung zat-zat perusak seperti ion klorida. Penetrasi ion klorida akan merusak lapisan pasif pada beton dan mengakibatkan terjadinya korosi, sehingga penggunaan beton berkualitas baik sangat dibutuhkan. Pada penelitian ini, beton mutu tinggi memadat mandiri dengan variasi substitusi metakaolin terhadap berat semen sebesar 0% (kontrol); 10%; 12,5%; 15%; 17,5 %; dan 20% digunakan sebagai solusi. Tujuan penelitian adalah mengidentifikasi pengaruh substitusi metakaolin dan kadar optimumnya untuk meningkatkan resistensi beton terhadap penetrasi klorida. Penelitian ini menggunakan metode eksperimental dengan benda uji silinder beton berdiameter 7,5 cm dan tinggi 15 cm. Pengujian kedalaman penetrasi klorida menggunakan metode uji penetrasi klorida laboratorium dipercepat, benda uji dipaparkan pada lingkungan klorida dengan konsentrasi 2% dengan variasi waktu pemaparan 15, 37, dan 51 hari dan kemudian dianalisis menggunakan metode AgNO3 colorimetric (Fu et al., 2022). Pengujian sorptivitas klorida dilakukan berdasarkan ASTM C.1585 (ASTM International, 2013) menggunakan variasi waktu 30, 90, dan 1440 menit. Dari hasil penelitian, didapat bahwa substitusi metakaolin 15% merupakan kadar optimum untuk menurunkan penetrasi dan sorptivitas klorida pada beton sebagai kontribusi dari reaksi pozzolaniknya. Penelitian diharapkan dapat bermanfaat sebagai pencegahan kerusakan beton bertulang pada lingkungan agresif dengan menghasilkan analisis beton bermutu baik dan ramah lingkungan. Reinforced concrete structures are often exposed to environments containing corrodents such as chloride ions. The penetration of chloride ions will deteriorate the passive layer of the concrete and result in corrosion, thus the use of good-quality concrete is required. In this study, high-strength self-compacting concrete with a variation of metakaolin substitution to cement weight of 0% (control); 10%; 12.5%; 15%; 17.5%; and 20% was used as a solution. The objective of the study was to identify the effect of metakaolin substitution and its optimum level to improve concrete resistance to chloride penetration. This research used an experimental method with concrete cylindrical specimens of 7.5 cm diameter and 15 cm height. The chloride penetration depth test used the accelerated laboratory chloride penetration test method, the specimens were exposed to a chloride environment with a concentration of 2% with a variation of exposure times of 15, 37, and 51 days and then analyzed using the colorimetric AgNO3 method (Fu et al., 2022). The chloride sorptivity test was conducted based on ASTM C.1585 (ASTM International, 2013) using time variations of 30, 90, and 1440 minutes. Based on the results, it was found that 15% metakaolin substitution is the optimum level to reduce the penetration and sorptivity of chloride in concrete as a contribution to its pozzolanic reaction. The research is expected to be useful in the prevention of deterioration of reinforced concrete in aggressive environments by producing good quality and environmentally friendly concrete analysis.

Peningkatan Kesadaran Penggunaan BIM (Building Information Modeling) 5D pada Penyedia Jasa Lokal CV. Batu Intan Pradana H S, Canggih Gilang; Pratama, Ramadhan Widy; Halimah, Rainy Shinta Nur; Pratiwi, Kholis Hapsari; Rahmi, Ardia Tiara; Deni, Delista Putri; Alfianarrochmah, 'Ilma; Kurnianingsih, Oktavia; Susanto, Tri; Legowo, Slamet Jauhari; Yanto, Fendi Hary
Jurnal Pengabdian Pada Masyarakat Vol 9 No 1 (2024): Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30653/jppm.v9i1.648

Permintaan mengenai kebutuhan pada bidang konstruksi terus meningkat tiap waktunya. Banyaknya Perusahaan yang bergerak pada bidang konstruksi bersaing untuk memberikan pembangunan yang terbaik pada clien-nya. Namun pada kenyataan, setiap proyek yang berlangsung tidak selalu berjalan mulus. Banyak sekali terjadi humans erorrs selama proses konstruksi berlangsung. Hal tersebut bisa saja terjadi karena pihak penyedia jasa masih mengandalkan metode- metode konvensial pada kegiatan konstruksi dan belum menerapkan digitalisasi. Digitalisasi ini merupakan bentuk kepedulian terhadap dunia konstruksi di Indonesia, khususnya area Solo raya. Untuk mencapai hal tersebut, maka dilakukanlah pengabdian yang bertujuan untuk memberdayakan penyedia jasa untuk melakukan digitalisasi pada kegiatan konstruksi melalui penerapan BIM. Penyedia jasa yang digandeng merupakan penyedia jasa lokal yakni, CV Batu Intan. Pengabdian ini berisikan kegiatan sosialisasi dan pelatihan penggunaan BIM 5D. BIM 5D dipilih karena BIM 5D dapat menentukan volume material serta biaya secara akurat. Hal tersebut tentu sangatlah membantu selama kegiatan konstruksi berlangsung. Metode yang digunakan pada pengabdian ini adalah perencanaan, sosialisasi dan pelatihan (short course), serta peninjauan dan monitoring evaluasi. Kegiatan pengabdian ini memberikan hasil yang baik pada penyedia CV. Batu Intan dalam penggunaannya terhadap BIM menjadi lebih paham dari yang sebelumnya masih awam mengenai BIM. The demand for needs in the construction sector continues to increase. Many companies operating in the construction industry compete to offer the best construction to their clients. However, in reality, every project that is carried out does not always go smoothly. Many human errors occur during the construction process. This could happen because service providers still rely on conventional methods in construction activities and have not implemented digitalization. This digitalization is a form of concern for the world of construction in Indonesia, particularly in the greater Solo region. To achieve this, a service has been produced which aims to enable service providers to digitize construction activities through the application of BIM. The partner service provider is a local service provider, namely CV Batu Intan. This service contains socialization and training activities in the use of 5D BIM. BIM 5D was chosen because BIM 5D can accurately determine material volumes and costs. This is definitely very useful during construction activities. The methods used in this service are planning, socialization and training (short courses), as well as evaluation, monitoring and follow-up. This service activity gives good results to CV providers. Batu Intan, in his use of BIM, has become more proficient than he was before.

Analisis Algoritma Random Forest dan Kombinasi Indeks Spektral untuk Identifikasi Lahan Terbangun (Kasus Kota Surakarta) Rahmi, Ardia Tiara; Pratiwi, Kholis Hapsari; Deni, Delista Putri
J-SAKTI (Jurnal Sains Komputer dan Informatika) Vol 7, No 2 (2023): EDISI SEPTEMBER
Publisher : STIKOM Tunas Bangsa Pematangsiantar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30645/j-sakti.v7i2.692

In an effort to realize one of the objectives of the Sustainable Development Goals (SDGs) program goal 11 concerning Sustainable Cities and Settlements, controlling the intensity of urban built-up land in Indonesia really needs attention. One effort to monitor the condition of changes in built-up land that is easy, fast, cheap and efficient is to use the results of remote sensing data processing. Technological developments in the field of remote sensing are currently leading to processing based on Big Data and cloud computing, one of which is GEE (Google Earth Engine). Google Earth Engine. Identification of built-up land was carried out using the guided classification method of Machine Learning Random Forest and a combination of Spectral Index algorithms consisting of a combination of Urban Index (UI), Normalized Difference Vegetation Index (NDVI), and Modified Normalized Difference Water Index (MNDWI) algorithms. The object segmentation process on the results of the combined spectral index is carried out using the Otsu thresholding method. The results showed that the built-up area from the results of identification using the Random Forest algorithm and the spectral index combination algorithm in 2019 to 2023 has increased the area of land, which is shown in the 2019-2023 built-up land map. The accuracy test using the confusion matrix showed that the results of identification using a combination of spectral indices obtained OA and Kappa values which were included in the medium to high category, namely 98.69% and 0.969. So that this method can then continue to be used to monitor the pattern of development of built-up land in Surakarta City.

Analisis Algoritma Random Forest dan Kombinasi Indeks Spektral untuk Identifikasi Lahan Terbangun (Kasus Kota Surakarta) Rahmi, Ardia Tiara; Pratiwi, Kholis Hapsari; Deni, Delista Putri
J-SAKTI (Jurnal Sains Komputer dan Informatika) Vol 7, No 2 (2023): EDISI SEPTEMBER
Publisher : STIKOM Tunas Bangsa Pematangsiantar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30645/j-sakti.v7i2.692

In an effort to realize one of the objectives of the Sustainable Development Goals (SDGs) program goal 11 concerning Sustainable Cities and Settlements, controlling the intensity of urban built-up land in Indonesia really needs attention. One effort to monitor the condition of changes in built-up land that is easy, fast, cheap and efficient is to use the results of remote sensing data processing. Technological developments in the field of remote sensing are currently leading to processing based on Big Data and cloud computing, one of which is GEE (Google Earth Engine). Google Earth Engine. Identification of built-up land was carried out using the guided classification method of Machine Learning Random Forest and a combination of Spectral Index algorithms consisting of a combination of Urban Index (UI), Normalized Difference Vegetation Index (NDVI), and Modified Normalized Difference Water Index (MNDWI) algorithms. The object segmentation process on the results of the combined spectral index is carried out using the Otsu thresholding method. The results showed that the built-up area from the results of identification using the Random Forest algorithm and the spectral index combination algorithm in 2019 to 2023 has increased the area of land, which is shown in the 2019-2023 built-up land map. The accuracy test using the confusion matrix showed that the results of identification using a combination of spectral indices obtained OA and Kappa values which were included in the medium to high category, namely 98.69% and 0.969. So that this method can then continue to be used to monitor the pattern of development of built-up land in Surakarta City.

ANALISIS SERAPAN LARUTAN KARBONAT PADA BETON MUTU TINGGI MEMADAT MANDIRI DENGAN VARIASI SUBSTITUSI METAKAOLIN Deni, Delista Putri; Santosa, Ignatia Wahyu Listyorini; Rahmi, Ardia Tiara; Pratiwi, Kholis Hapsari
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 2, Mei 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i2.32259

Concrete is often exposed to extreme environmental conditions that affect its durability. One of them is when carbon dioxide in an environment with a certain humidity reacts with hydrated cement minerals and results in carbonation of concrete. Carbonation will penetrate the concrete surface and further result in corrosion of the reinforcement. One method of testing the carbonation of concrete is to expose it to 4% carbonate solution. Therefore, the absorption of carbonate solution in concrete and its relationship with carbonation need to be identified. This study aims to analyze the absorption of carbonate solution and its relationship with the nominal carbonation coefficient of concrete. The object of the study was high strength self-compacting concrete with metakaolin substitution variations of 0%; 10%; 12.5%; 15%; 17.5%; and 20% by weight of cement. The method used was laboratory-based experimental method. The absorption test was conducted based on SNI 03-2914-1992 by soaking 75 mm diameter and 150 mm height concrete cylinder specimens into 4% carbonate solution for 10+0.5 minutes and 24 hours. The results showed that the absorption of carbonate solution in concrete was influenced by the variation of metakaolin substitution and gave a positive correlation with the nominal carbonation coefficient of concrete. Concrete with 15% metakaolin substitution gave the lowest 10+0.5 min and 24 h absorption values of 0.82% and 2.21%, respectively, and the lowest nominal carbonation coefficient of 3.71 mm/year1/2. Abstrak Beton seringkali terekspos pada kondisi lingkungan cukup ekstrem yang berpengaruh terhadap durabilitasnya. Salah satunya adalah ketika karbondioksida pada kelembaban tertentu di lingkungan bereaksi dengan mineral semen terhidrasi dan mengakibatkan terjadinya karbonasi beton. Karbonasi akan menembus permukaan beton dan selanjutnya mengakibatkan terjadinya korosi pada tulangan. Salah satu metode pengujian karbonasi beton adalah dengan memaparkannya pada larutan karbonat 4%. Oleh karena itu, penyerapan larutan karbonat pada beton dan hubungannya dengan karbonasi perlu diidentifikasi. Penelitian ini bertujuan untuk menganalisis serapan larutan karbonat dan hubungannya dengan koefisien karbonasi nominal beton. Objek penelitian adalah beton mutu tinggi memadat mandiri dengan variasi substitusi metakaolin sebesar 0%; 10%; 12,5%; 15%; 17,5%; dan 20% terhadap berat semen. Metode yang digunakan adalah metode eksperimental berbasis laboratorium. Pengujian serapan dilakukan berdasarkan SNI 03-2914-1992 dengan merendam benda uji silinder beton berdiameter 75 mm dan tinggi 150 mm ke dalam larutan karbonat 4% selama 10+0,5 menit dan 24 jam. Hasil penelitian menunjukkan bahwa serapan larutan karbonat pada beton dipengaruhi oleh variasi substitusi metakaolin dan memberikan korelasi positif dengan koefisien karbonasi nominal beton. Beton dengan variasi substitusi metakaolin 15% memberikan nilai serapan 10+0,5 menit dan 24 jam terendah yaitu 0,82% dan 2,21%, serta nilai koefisien karbonasi nominal terendah yaitu 3,71 mm/tahun1/2.

SOSIALISASI PEMANFAATAN BETON SERAT HYBRID UNTUK PENINGKATAN DURABILITAS KONSTRUKSI BANGUNAN GEDUNG DI CV. SOKOGI REKSACIPTA Deni, Delista Putri; Kurnianingsih, Oktavia; Majid, Aziz Abdul; Pratiwi, Kholis Hapsari; Nusantara, Johan Lautan Wijaya; Alfianarrochmah, Ilma; Saputra, Canggih Gilang Pradana Hardi; Legowo, Slamet Jauhari; Yanto, Fendi Hary
Jurnal Abdi Insani Vol 12 No 9 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i9.2934

Building construction in the Soloraya area often encounters cracking problems. This problem is generally caused by various factors such as improper design, poor material quality, building age, etc. which can have an impact on durability and structural strength. Therefore, Appropriate Structure Research Group conducted a community service with the aim of providing solutions to be utilized in the construction of buildings in the Soloraya area. This service was carried out with CV. Sokogi Reksacipta which is a local construction consultancy service provider. The concrete innovation presented as a solution is hybrid fiber concrete that combines natural fibers, i.e. ramie fibers and synthetic microfibers with improved mechanical properties to increase resistance to cracking. Through a series of laboratory tests and data analysis, the effectiveness of using hybrid fiber concrete in reducing the risk of cracking and increasing the durability of concrete structures was evaluated. The method used in this community service is socialization of the use and method of making innovative concrete. From the results of this program, 93.75% of participants understood the socialization activities, therefore this program is expected to contribute to the development of more durable and sustainable concrete technology for building construction applications in the Soloraya area.

Penetrasi dan Sorptivitas Klorida Beton Mutu Tinggi Memadat Mandiri dengan Variasi Substitusi Metakaolin Deni, Delista Putri; Alfianarrochmah, 'Ilma; Kurnianingsih, Oktavia
Jurnal Teknik Sipil dan Lingkungan Vol. 8 No. 2: Agustus 2023
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.8.02.115-126

Struktur beton bertulang seringkali terekspos pada lingkungan yang mengandung zat-zat perusak seperti ion klorida. Penetrasi ion klorida akan merusak lapisan pasif pada beton dan mengakibatkan terjadinya korosi, sehingga penggunaan beton berkualitas baik sangat dibutuhkan. Pada penelitian ini, beton mutu tinggi memadat mandiri dengan variasi substitusi metakaolin terhadap berat semen sebesar 0% (kontrol); 10%; 12,5%; 15%; 17,5 %; dan 20% digunakan sebagai solusi. Tujuan penelitian adalah mengidentifikasi pengaruh substitusi metakaolin dan kadar optimumnya untuk meningkatkan resistensi beton terhadap penetrasi klorida. Penelitian ini menggunakan metode eksperimental dengan benda uji silinder beton berdiameter 7,5 cm dan tinggi 15 cm. Pengujian kedalaman penetrasi klorida menggunakan metode uji penetrasi klorida laboratorium dipercepat, benda uji dipaparkan pada lingkungan klorida dengan konsentrasi 2% dengan variasi waktu pemaparan 15, 37, dan 51 hari dan kemudian dianalisis menggunakan metode AgNO3 colorimetric (Fu et al., 2022). Pengujian sorptivitas klorida dilakukan berdasarkan ASTM C.1585 (ASTM International, 2013) menggunakan variasi waktu 30, 90, dan 1440 menit. Dari hasil penelitian, didapat bahwa substitusi metakaolin 15% merupakan kadar optimum untuk menurunkan penetrasi dan sorptivitas klorida pada beton sebagai kontribusi dari reaksi pozzolaniknya. Penelitian diharapkan dapat bermanfaat sebagai pencegahan kerusakan beton bertulang pada lingkungan agresif dengan menghasilkan analisis beton bermutu baik dan ramah lingkungan. Reinforced concrete structures are often exposed to environments containing corrodents such as chloride ions. The penetration of chloride ions will deteriorate the passive layer of the concrete and result in corrosion, thus the use of good-quality concrete is required. In this study, high-strength self-compacting concrete with a variation of metakaolin substitution to cement weight of 0% (control); 10%; 12.5%; 15%; 17.5%; and 20% was used as a solution. The objective of the study was to identify the effect of metakaolin substitution and its optimum level to improve concrete resistance to chloride penetration. This research used an experimental method with concrete cylindrical specimens of 7.5 cm diameter and 15 cm height. The chloride penetration depth test used the accelerated laboratory chloride penetration test method, the specimens were exposed to a chloride environment with a concentration of 2% with a variation of exposure times of 15, 37, and 51 days and then analyzed using the colorimetric AgNO3 method (Fu et al., 2022). The chloride sorptivity test was conducted based on ASTM C.1585 (ASTM International, 2013) using time variations of 30, 90, and 1440 minutes. Based on the results, it was found that 15% metakaolin substitution is the optimum level to reduce the penetration and sorptivity of chloride in concrete as a contribution to its pozzolanic reaction. The research is expected to be useful in the prevention of deterioration of reinforced concrete in aggressive environments by producing good quality and environmentally friendly concrete analysis.

SOSIALISASI DAN PEMBUATAN U-DITCH INOVASI BETON DENGAN LIMBAH PLASTIK DAN LIMESTONE DI CV. TUNGGAL TRI PERKASA Pratiwi, Kholis Hapsari; Rahmi, Ardia Tiara; Kurnianingsih , Oktavia; Pradana , Canggih Gilang; Deni, Delista Putri; Alfianarrochmah , Ilma; Yanto, Fendi Hary
Jurnal Abdi Insani Vol 11 No 3 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i3.1807

The business of making and selling U-ditch products has been carried out by CV. Tunggal Tri Perkasa since 2021. However, sales have not experienced a significant increase due to the increasingly expensive material costs for making U-ditch and price competition with other U-ditch manufacturers. U-ditch is precast concrete used to make water channels and is made from materials such as cement, sand, gravel and water. The aim and benefits of this service are to overcome these problems. The RG D3 Civil Engineering team seeks to provide solutions by collaborating on concrete innovation research that has been carried out to be applied to partner U-ditch products. The innovative concrete used uses Polypropylene Plastic (PP) instead of gravel and limestone instead of sand and cement to minimize production costs. The method used in this service is to socialize and directly manufacture U-ditch with innovative concrete. The proportions designed for the innovative concrete use 15% limestone and 5% PP plastic to obtain quality according to U-ditch standards. The results of this service activity after completing the questionnaire to partner members were that 90% understood the socialization activities and stages of making U-ditch. This activity provides knowledge about renewable innovations in concrete to be applied to U-ditch so that in the future partners can increase production results.

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