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MENENTUKAN KLASIFIKASI DAN KARAKTERISTIK TANAH DAERAH BENDILJATI, SUMBERGEMPOL TULUNGAGUNG MENGGUNAKAN UJI LABORATORIUM Ma’rifatul Mumayyizah; Agata Iwan Candra; Mahardi Kamalika Khusna Ali; Alfina Iskindaria; Farikhatul Mufaidah; Moch. Risjad Aldiansyah; Ilham Rizqi Nurdian Putra; Roid Ahmad Faizin
Rang Teknik Journal Vol 7, No 1 (2024): Vol. 7 No. 1 Januari 2024
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v7i1.4130

Abstract

Jumlah penduduk dan pertumbuhan ekonomi di Kabupaten Tulungagung lambat laun semakin meningkat, yang berdampak pada peningkatan serta berkembangnya pembangunan. Dalam mendirikan sebuah bangunan, hal yang pertama kali harus dilakukan adalah penyelidikan tanah. Penyelidikan tanah penting dilakukan untuk mengetahui karakteristik tanah. Penelitian ini bertujuan untuk menganalisis karakteristik tanah dari daerah Bendiljati, Kecamatan Sumbergempol Kabupaten Tulungagung. Penelitian dilakukan secara eksperimental dengan mengambil sampel tanah dari daerah Bendiljati Kecamatan Sumbergempol Kabupaten Tulungagung. Jenis tanah diklasifikasikan menggunakan AASHTO dan USCS. Juga dilakukan pengujian liquid limit, plastic limit, pemadatan, dan kuat geser tanah. Hasil penelitian didapatkan klasifikasi tanah menurut USCS, tanah termasuk jenis SP-SM dengan gradasi buruk, dan pada klasifikasi AASHTO, tanah termasuk A-2-4 yang mempunyai rating Excellent to Good. Dari uji batas Atterberg didapatkan nilai indeks plastisitas sebesar 0,564% sehingga tanah termasuk kategori slightly plastic. Pada uji pemadatan didapatkan nilai berat volume kering maksimum sebesar 1,50 gr/cm pada kadar air optimum 26,04% yang dapat digunakan untuk rekomendasi pemadatan jenis tanah SP-SM. Dan di uji kuat geser diperoleh nilai sudut geser sebesar 24,837° dengan nilai kohesi sebesar 0,459 kPa, dari nilai tersebut dapat digunakan sebagai dasar dalam perencanaan pondasi. Hasil penelitian ini dapat digunakan sebagai referensi untuk proyek konstruksi di sekitar area kabupaten Tulungagung.
Increasing Soil Bearing Capacity and Shear Modulus with Recycle Concrete Aggregate Pertiwi, Sheila Ananda Putri; Candra, Agata Iwan; Karisma, Dwifi Aprillia; Ali, Mahardi Kamalika Khusna
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 12 No 2 (2024): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2024)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v12i2.9517

Abstract

Soil is an important component in building construction because it supports the structure. Clay soils often pose problems due to their high potential for swelling and shrinkage, which can result in cracking and building settlement. Stabilization of clay soil is an important solution. This research aims to evaluate the effect of recycled aggregate concrete (RCA) from laboratory construction waste on the characteristics of clay soil. The research method involved laboratory experiments, with a mixture of clay and RCA at 5%, 10%, and 15% variations. Testing includes Atterberg Limit, Standard Proctor Test, and Unconfined Compressive Strength (UCS). The results showed that adding RCA increased clay soil's bearing capacity and shear modulus. The peak bearing capacity was achieved by adding 5% RCA, with a Qu value reaching 265.24 kN/m². The shear modulus also increased from 41.63 MPa to 62.442 MPa with the addition of 5% RCA. Thus, the addition of RCA from laboratory construction waste can increase the bearing capacity and shear modulus of clay soil to support construction safety and the principles of sustainable development.
Analisa Efisiensi Dan Produktivitas Pekerjaan Kolom Pada Proyek Gedung 7 Lantai Universitas Kadiri Azhari, Faiz Muhammad; Sumargono, Sumargono; Candra, Agata Iwan
PUBLIKASI RISET ORIENTASI TEKNIK SIPIL (PROTEKSI) Vol 6 No 1 (2024): Vol. 6 No.1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/proteksi.v6n1.p102-109

Abstract

Pembangunan gedung Universitas Kadiri terus berkembang pesat. Kolom beton bertulang merupakan pilihan yang paling umum digunakan dalam pembangunan gedung-gedung tinggi. Namun, pekerjaan kolom membutuhkan tenaga kerja yang cukup banyak. Tujuan penelitian ini adalah untuk menganalisis pengaruh penambahan tenaga kerja terhadap produktivitas dan efisiensi pekerjaan kolom. Penelitian ini menggunakan metode kuantitatif. Data waktu kerja yang dibutuhkan untuk menyelesaikan setiap aktivitas kerja kolom diperoleh dari observasi menggunakan alat stopwatch. Data tersebut kemudian digunakan untuk menghitung waktu normal, allowance, waktu standar, output standar, produktivitas, dan efisiensi. Penambahan tenaga kerja dari 6 menjadi 7 dapat meningkatkan produktivitas sebesar 3,29% dan efisiensi sebesar 6,54%. Peningkatan produktivitas relatif kecil dibandingkan dengan peningkatan efisiensinya. Temuan ini memberikan bukti empiris bahwa penambahan tenaga kerja dapat meningkatkan efisiensi pekerjaan kolom.
Penentuan Karakteristik Tanah Desa Ngasem dengan Metode ASTM Safi'i, Annas Dwi; Candra, Agata Iwan; Altara, Jecksindio Elten; Oktaviadi, Mohammad Reza; Dwi K, Mohamad Agus; Mahardika, Rega; Aditia, Trio Syiwa
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 7 No. 1 (2023)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v7i1.9196

Abstract

Abstract: Soil is an important part of a sub-building structure, soil characteristics need to be considered in the initial planning of a construction, in order to achieve stability and security for the building above it. With different soil conditions, as is the case with the soil in Ngasem village which has low carrying capacity, it is necessary to know which structure meets the requirements for the soil conditions in Ngasem. To find out the characteristics of the soil is done by testing in the laboratory, namely testing the physical and mechanical properties. Testing the physical properties of the soil is testing the water content (Wc), specific gravity (Gs), Atterberg limits and soil unit weight (γ). Mechanical testing with proctor test and direct shear strength. The method used is an experimental method by taking soil samples at a depth of ± 80 cm and conducting research tests in the Kadiri University laboratory. So that the results of soil classification with the SW-SM code are obtained which are classified as well-graded sandy soils with silt mixtures based on USCS and classified as (A-1-b) according to the AASHTO classification system. The Atterberg Limit of Low Plasticity (clay low plasticity) with a Plastic Index Value of 3.243 which is classified as Slightly Plastic, a shear angle value of 38.748° with a cohesion value of 1.914, a maximum dry unit weight value of 1.77 gr/cm3 , and an optimum moisture content of 14.44 . So that with this study, the community is expected to choose and adjust the type and quality of the structure of building materials in accordance with the state of the land. Keywords: Soil properties, Compaction, Shear Test, Liquid Limit, Plastic Limit
The Optimum Vibration of the Compressive Strength of Concrete Specimen Karisma, Dwifi Aprillia; Candra, Agata Iwan; Ali, Mahardi Kamalika Khusna; Sari, Tiara Sherlyta; Pertiwi, Sheila Ananda Putri
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.54522

Abstract

Concrete is the primary material in construction, so it needs further research to get good quality concrete. The quality and durability of concrete are influenced by the amount and shape of the air cavity inside the concrete. With vibrating, the air that is inside the concrete will be lost. The benefits of vibration will only be achieved if planned and implemented with a suitable method. With proper vibration, the air in the concrete will come out and make porous concrete. Reduction or removal of air cavities will make concrete mixes strong with low permeability, increasing the durability of concrete. This study aims to determine the optimum strong vibrating on the compressive strength of Fc' 21,7 Mpa concrete. Vibrating will be performed on cylinder concrete samples with a duration time of 3 minutes and with different variations in acceleration 160 m/s2, 170 m/s2, 180 m/s2, 190 m/s2, 200 m/s2, variation velocity 140 mm/s, 150 mm/s, 160 mm/s, 170 mm/s, 180 mm/s, displacement variation 600 mm, 800 mm, 1000 mm, 1200 mm, 1500 mm. Each variation consists of 7 concrete samples. These tests were performed with methods of external vibrating by using MBT Vibrating table CO-410 in fresh concrete. Compressive strength testing is carried out at 28 days. This study shows that the optimum strong vibrating with acceleration 180 m/s2, velocity 160 mm/s, and displacement 1000 mm with the resulting compressive strength is Fc' 23.06 MPa. So that knowing the optimum vibration strength can be the basis for the implementation of vibration to get the planned concrete quality.
Consistency of Compressive Strength in Concrete with 10% Rice Husk Ash Substitution Alfaridh Pasya, Salman; Bima Mahardana, Zendy; Mustofa, Imam; Iwan Candra, Agata
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6583

Abstract

Using rice husk ash (RHA) in concrete technology represents a significant innovation in promoting sustainability. The pozzolanic properties of RHA enhance concrete quality through microstructural refinement while mitigating environmental impacts. However, replacing 10% of cement with RHA has inconsistent effects on compressive strength. Such variability may limit the broader application of RHA in structural concrete due to uncertainties in performance prediction, quality assurance, and design safety. While some studies report strength improvements, others note reductions often attributed to limited samples size, material inconsistencies, and variations in mixing or curing processes. This study aims to statistically validate the consistency of compressive strength in concrete with 10% RHA substitution by increasing the sample size and controlling key variables. Nine specimens per test condition were evaluated using a water-cement ratio of 0.53, submersion curing and ASTM C39 testing standards. Compressive strength assessment was conducted at 7 days. The result show a 7.54% increase in compressive strength, from 22.71 MPa to 24.42 MPa, with a coefficient of variation (CV) of 2.26%, well below the 10% threshold. In contrast, earlier studies with smaller sample sizes reported CVs as high as 42.65%, indicating greater statistical variability. This improvement is attributed to the increased sample size, material quality control, and uniform mixing, which ensured homogeneous RHA distribution and optimized pozzolanic reactions. By applying a controlled-variable approach and increasing the sample size, this study addresses prior inconsistencies and reinforces the validity of RHA as a viable cement substitute in concrete.
Statistical Validation of 2% Lignosulfonate as a Sustainable Stabilizer for Expansive Clay Rivianto, Arif; Candra, Agata Iwan; Nursandah, Fauzie; Mustofa, Imam
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6594

Abstract

Expansive clay soils undergo volumetric changes due to fluctuations in moisture content, which can cause structural damage to foundations, pavements, and embankments. Traditional stabilization methods, such as cement and lime, are effective but have a significant environmental impact, highlighting the need for more environmentally friendly alternatives. Lignosulfonate (LS), an organic stabilizer derived from industrial by-products, offers a more sustainable approach to improving soil strength and stability. This study evaluates the effect of 2% lignosulfonate on the unconfined compressive strength (UCS) of expansive clays. The research method involved mixing LS at 2% of the dry weight of the soil into the expansive clay (CL-ML) and conducting UCS tests on three untreated (control) samples and six treated samples. Statistical analysis was used to assess the significance of the differences between the two groups. Results show that the UCS increased from 236.29 kPa in the control group to 291.49 kPa in the treated group, reflecting a 23.37% improvement. Poisson's ratio decreased from 0.300 to 0.200, indicating reduced lateral deformation and enhanced soil stiffness, which improves the bearing capacity and stability of structures built on it. The UCS values ​​were observed to be consistent supported by low standard deviation. The study highlights the critical role of adequate sample replication and control over operational variables such as moisture content, compaction, and LS dispersion to ensure reliable and reproducible stabilization outcomes. This study strengthens the empirical basis for the application of LS as a sustainable and environmentally friendly stabilizer for expansive clays.
Effect of Variations in Water Addition On Maximum Dry Weight in Clay Soil Compaction Rina Dwi Fatika; Agata Iwan Candra; Mahardi Kamalika Khusna Ali
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1397

Abstract

Soil is a crucial element in construction, serving as the foundation for structural support. Soil compaction is one of the primary methods to enhance soil stability, especially for clay soil, which expands and shrinks due to changes in moisture content. This study aims to analyze the effect of water content variation on the maximum dry unit weight in clay soil compaction. The experimental testing was conducted in the Civil Engineering Laboratory of Kadiri University using the TS-365 Automatic Standard Proctor machine. The water content variations used were 15%, 18%, 20%, 23%, and 26%. The results showed that the optimum moisture content for achieving the maximum dry unit weight was 23%, with a maximum dry unit weight of 1,743 g/cm³. Increasing water content up to the optimum point increases soil density, but excess water reduces the dry unit weight due to particle separation. This research contributes to optimizes clay soil compaction for more stable and sustainable construction. By determining the optimum moisture content, the compaction process can be conducted more efficiently, minimizing the risk of soil volume changes and improving soil-bearing capacity for long-term infrastructure development.
INCREASING THE BEARING CAPACITY OF SQUARE FOUNDATIONS BASED ON SOYBEAN BIO-CEMENTATION Safi'i, Annas Dwi; Candra, Agata Iwan; Ali, Mahardika Kamalika Khusna
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 14 No. 3 (2025): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v14i3.57680

Abstract

Sandy soils are commonly employed as the foundation for shallow footings. However, their relatively low bearing capacity often leads to excessive settlement and deformation. This study examines the potential application of the Enzyme-Induced Carbonate Precipitation (EICP) technique based on soybeans. Utilizing urease derived from soybeans to catalyze the crystallization of calcium carbonate (CaCO₃). This research investigates the impact of EICP-induced carbonate precipitation on the bearing capacity of sandy soil in square footings. 4 x 4 cm footing model was tested using the AIC-Innovation Loading Test apparatus. Direct shear additional tests were performed to assess differences in increase cohesion and shear angle. The results show 174.90% increase in bearing capacity, 73.47% reduction in settlement, 300.64% increase in cohesion from the shear test, and  202.46% increase from the loading test. The shear angle increased by 56.34%, and the dry unit weight increased by 36.5%. ANOVA analysis with a p-value of 2.03 × 10⁻¹⁵ < 0.05 confirmed that the increase in bearing capacity was not due to random variation but to the EICP treatment. These findings demonstrate that EICP proves to be a viable technique to enhance sandy soil and contributes to advancing of bio-cementation based on organic materials as a sustainable solution.
Jumlah Lintasan Meningkatkan Rasio MDD Pemadatan Tanah Husna, Nadiya; Candra, Agata Iwan; Ali, Mahardi Kamalika Khusna
Blend Sains Jurnal Teknik Vol. 4 No. 2 (2025): Edisi Oktober
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/blendsains.v4i2.1035

Abstract

Rendahnya kualitas pemadatan tanah menjadi salah satu penyebab utama kerusakan dini infrastruktur jalan, terutama karena tidak tercapainya densitas kering lapangan sesuai spesifikasi. Penelitian ini bertujuan untuk mengevaluasi pengaruh jumlah lintasan pemadatan terhadap nilai rasio Maximum Dry Density (MDD) sebagai indikator keberhasilan pemadatan tanah. Pengujian dilakukan pada proyek Jalan Tol Probolinggo-Banyuwangi Paket 3 di STA 31+166, membandingkan kedua perlakuan tersebut yaitu lintasan 8 dan 10 lintasan dengan menggunakan alat berat Vibro Roller. Data ANOVA satu arah pada tingkat signifikansi < 0,05 menunjukkan bahwa jumlah lintasan pemadatan berpengaruh signifikan terhadap rasio MDD (p = 0,038). Peningkatan lintasan menghasilkan distribusi energi yang lebih merata dan mampu meningkatkan berat isi kering lapangan. Temuan ini dapat digunakan sebagai acuan evaluasi dalam pengendalian mutu berdasarkan jumlah lintasan pemadatan yang tersedia dalam laporan proyek harian, serta memperkuat pemahaman teknis tentang hubungan distribusi energi pemadatan dengan kepadatan lapangan yang optimal.
Co-Authors Abidatul Izzah Aditia, Trio Syiwa Aditiya Yayang Nurkafi Afif Nur Rahmadi Afif Nur Rahmadi, Afif Nur Afriyan Arsya Sabilla Agung Guncoro Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmada Khotibul Umam Aldri Frinaldi Alfaridh Pasya, Salman Alfina Iskindaria Altara, Jecksindio Elten Alvin Hidayat Amanda Rizky F Anasrudin Yusuf Andri Dwi Cahyono Annas Dwi Safi&#039;i April Gunarto April Gunarto April Gunarto Ardinata Ardinata Ariadi Santoso Ariadi Santoso, Ariadi Arif Fathur Rohman Arif Rivianto Arif Rivianto Arthur Daniel Limantara, Arthur Daniel Ashabul Yamin Atsfiela Dzulkhan Qalby Bagas Naga Pratala Haryadi Bella Amiria Rahmahima Bima Mahardana, Zendy Budi Heryanto Budi Winarno Budi Winarno Candra Yulianto Dicko Mahendra Dikhy Ridho Laksono Dodi Setiawan Dwi Hartanto Dwi K, Mohamad Agus Dwifi Aprilia Karisma Dwifi Aprilia Kharisma Dwifi Aprillia Karisma Edy Gardjito, Edy Eko Siswanto Eko Siswanto Eko Winarti Elsa Rizqi Purwanti Evita Fitrianis Hidiyati Faiz Muhammad Azhari Fajar Romadhon Fajar Romadhon Fandra Andriansyah P Farikhatul Mufaidah Fatkunada, Nur Addin Fauzie Nursandah Fauzie Nursandah Febrian, Bagas Fianca Nimas Yamada Puteri Fidyan Mamlu&#039;atul Husna Fitry Rahmawaty Fransesco Indra Permana Friska Windi Meira Aisyah Galang Santoso Hadi Mashuri Hendy Hendy Hendy Henny Prasetiyo Heri Wahyudiono Herlan Pratikto Herlangga Duta Pramudya Hermawan Hermawan Hidiyati, Evita Fitrianis Hikmatul Lailiya Husna, Nadiya Ilham Rizqi Nurdian Putra Imam Mustofa Imam Safi'i Kavindo Yugiswara Hutama Khoirun Nisa&#039; Khoirun Nisa' Ki Catur Budi Ki Catur Budi Ki Catur Budi S Krisdiyanto Nugroho Leo Agusta Utama Lin Sintyawati M Ilham Fauzil Fahmi Mahardi Kamalika Khusna Ali Mahardika, Rega Malik Ibrahim Ma’rifatul Mumayyizah Meylinda Vricilia Mishbahul Aziz Moch Aminuddin Moch. Risjad Aldiansyah Mochamad Rizki Mochammad Danara Indra Pradigta Moh. Idham Cholid Moh. Ilham Farihi Mohamad Agus Fajar Wibowo Mohammad Abdul Aziz Hanafi Mohammad Roziq Muchammad Sutikno Mudinillah, Adam Muhammad Bahrudin Muhammad Feggi Saputra Muhammad Heri Nastotok Muhammad Heri Nastotok Muhammad Lutfi Amzari Muhammad Nasih Al hasbi Muhammad Ridho Muhammad Rosyid Abdul Rohman Fauzy Muhammad Sulton Bahrudin Mukhammad Ibnul Mubarok Nadi Rheiza Fathurrohman Niko Andika Erwanda Nur Addin Fatkunada Nursandah, Fauzie Ogest Tegar Widyakrama Oktaviadi, Mohammad Reza Onie Wardani Pertiwi, Sheila Ananda Putri Prendy Eliya Mahendra Putri, Yuzi Melia Adi Rahadi Reswara Rahmat Heru Rahmat Heru Rahmat Heru Supriyo Rahmat Heru Supriyo Rahmawati, Apriliya Laily Ramadhan Mahendra Ravie Setya Putra Rekso Ajiono Ricky Putra Ardianto Rikha Wirda Izzati Rina Dwi Fatika Rina Dwi Fatika Rivianto, Arif Rohmat Ilyas Kurniawan Roid Ahmad Faizin Romadhon Romadhon Romadhon, Fajar Safi'i, Annas Dwi Safi'i, Imam Safi’i, Annas Dwi Saiful Muslimin Salman Alfaridh Pasya Sari, Tiara Sherlyta Satria Arung Bangun Samodera Satria Febby Romaadhoni Sefiyanti, Redyka Sheila Ananda Putri Pertiwi Sigit Winarto Sigit Winarto Sigit Winarto Sigit Winarto Sony Santoso Sony Susanto Sri Wiwoho Mudjanarko, Sri Wiwoho Sudjati Sudjati Sudjati Sudjati Sugeng Yani Widodo Sulik Anam Sulik Anam Sulik Anam Sumargono Sumargono Sumargono Sumargono Sumargono Supriadi Supriadi Supriono Supriono Suwarno Suwarno Tiara Sherlyta Sari Tiok Kresna Aji Two Puji Guntur A Uminarsih Uminarsih Veithzal Rivai Zainal Vella Maulina Kris Putri Wahyu Agung Nugroho Wardani, Onie Widodo Restu Putra Widodo, Silvi Rushanti winarti, eko Wisnu Arganata Yosef Cahyo Yosef Cahyo Yosef Cahyo S Yosef Cahyo S.P Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Purnomo Yusiane Saraswati Yuzi Melia Adi Putri Zaizafun Zakiya Zaizafun Zakiya Zakiya, Zaizafun Zendy Bima Mahardana