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All Journal RACIC : Rab Construction Research Journal on Education Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Jurnal Teknik Industri Terintegrasi (JUTIN) ABDI MASSA: Jurnal Pengabdian Nasional Society : Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Taguchi : Jurnal Ilmiah Teknik dan Manajemen Industri Journal of Innovative and Creativity
Laily Endah Fatmawati
Universitas 17 Agustus 1945 Surabaya
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Analisis Pengaruh Stabilisasi Tanah Lempung Lunak Menggunakan Bakteri Bacillus Subtilis dan Kapur Terhadap Nilai Parameter Fisis Tanah dan Kepadatan Tanah Satria Jiro Jovian; Laily Endah Fatmawati
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58691

Abstract

The development of infrastructure in Sidoarjo requires stable soil conditions, especially in areas dominated by soft clay soils. This study aims to determine the effect of soil stabilization using Bacillus subtilis bacteria and lime on the physical and compaction properties of soil. Laboratory tests were conducted on original soil and stabilized soil using 3% Bacillus subtilis bacteria with lime variations of 10% and 15% during a 3-day curing period. The results showed that the addition of Bacillus subtilis and lime reduced water content and optimum moisture content (OMC), while increasing the maximum dry density (MDD). The optimum mixture was obtained from 3% Bacillus subtilis and 15% lime, with an MDD value of 1.977 gr/cm³ and OMC of 19%. These results indicate that Bacillus subtilis and lime can improve soil density and stability. Therefore, this stabilization method has the potential to be applied as an alternative ground improvement technique for soft clay soils.
Studi Eksperimental Pengaruh Abu Serbuk Kayu dengan Bakteri Bacillus Subtilis Sebagai Bahan Stabilisasi Tanah Lunak Terhadap Nilai Proctor Test Tanah Lunak di Kecamatan Wonoayu - Sidoarjo Mufid Afif Syafriansah; Laily Endah Fatmawati
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58693

Abstract

This study aims to examine the effect of wood ash and the combination of wood ash with Bacillus subtilis as soil stabilizing agents on the compaction value (Proctor Test) and unconfined compressive strength (UCS) of soft clay soil. Soil samples were collected from Ploso Village, Wonoayu District, Sidoarjo Regency, which is characterized by high-plasticity organic clay with low bearing capacity. The test results revealed that the addition of wood ash increased the maximum dry density (MDD) from 1.446 gr/cm³ in natural soil to 2.036 gr/cm³ at 15% mixture, while the optimum moisture content (OMC) decreased from 27% to 20%. UCS also improved from 0.29981 kg/cm² in natural soil to 0.523213 kg/cm² at 15% mixture. Furthermore, the combination of wood ash with 5% Bacillus subtilis produced more significant results, with MDD reaching 2.047 gr/cm³, OMC reduced to 22%, and UCS increasing to 0.66386 kg/cm². These findings confirm that wood ash is effective as an eco-friendly stabilizing material, and its combination with Bacillus subtilis can further enhance the physical and mechanical properties of soft clay soil.
Perbaikan ALTERNATIF LONGSORAN DENGAN METODE PRELOADING DI JALAN LINGKAR TUBAN Reva Ayundasari Ayundasari; Laily Endah Fatmawati; Nurani Hartatik; Herry Widhiarto; Yudi D. Prasetyo; Siska Yovina Ervitasari
Racic : Rab Construction Research Vol. 7 No. 1 (2022): RACIC (RAB CONSTRUCTION RESEARCH)
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v7i1.2514

Abstract

The construction of the Tuban Ring Road Project or the so-called Ring Road/Tuban Ring Road is included in the Semanding District, located in Tuban Regency. This area is a potential road access because the road is the main access connecting the city of Tuban and the city of Lamongan. In field conditions at STA 9+050 to STA 9+075, there is land subsidence due to the additional load on the original soil. A soil improvement is needed to overcome the problem of subsidence in these conditions. Based on the conditions described, the Prefabricated Vertical Drain (PVD) method can be used as an alternative to soil improvement on the Tuban Ring Road. So the embankment height is 1.50 m. The length of time for land subsidence without using PVD is 197.311 years. Then after using PVD, the distance and depth of PVD installation is obtained, namely a triangular pattern with an installation distance of 1 m, it takes 12.5 weeks.
PERENCANAAN ULANG PERKUATAN STRUKTUR DERMAGA MENGGUNAKAN PONDASI TIANG PANCANG DENGAN VARIASI DIAMETER Clarissa Rahma Anisadila; Herry Widhiarto; Laily Endah Fatmawati
Racic : Rab Construction Research Vol. 8 No. 1 (2023): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v8i1.3099

Abstract

The wharf is one of the supporting facilities for the process of loading and unloading goods on ships. For services for long-term ships and loads caused by the process of loading and unloading ships, the safety of the wharf needs to be improved by strengthening the foundation. Berlian Pier uses a steel pile foundation with a diameter of 1.016 m and a length of 32 m. This study used the Meyerhoff method to calculate the bearing capacity of the piles and N-SPT data for the Reinforcement of Wharf Structures Using Diameter Variations at Berlian Surabaya Pier. Based on the re-planning that has been done, it is concluded that a diameter of 1.00 m and a length of 32 m obtains a single pile bearing capacity of 8164 Tons, shear resistance of 28120.4 Tons, axial bearing capacity of 8345.42 Tons. Immediate settlement of 38.551 mm, annual settlement of 00,0201 mm, long-term settlement of 0,193 mm, and total settlement of 48,050 mm. Keywords: Variation Diameter, Carrying Capacity, Settlement
ANALISIS PERBAIKAN TANAH DASAR MENGGUNAKAN METODE GEOTEKSTIL Saiful Anam; Laily Endah Fatmawati; Herry Widhiarto
Racic : Rab Construction Research Vol. 8 No. 1 (2023): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v8i1.3103

Abstract

Soil acts as a building material in various types of civil engineering work, on the other hand land plays a role as a support for building foundations such as embankments, highways and railroads. Soil improvement is a type of soil stability that is useful as soil improvement and performance required by technical requirements. In an effort to increase the carrying capacity of the soil, several methods can be used, such as: soil improvement using Replecement Soil, PVD Method, Preloading, Micropile, Geotextiles, etc. In this study, the geotextile method was used as an alternative reinforcement to find a larger and better safety number (SF) for soil conditions adjacent to (Groundwater Table), and can be the most effective alternative soil improvement method. Based on the analysis of the data, it was concluded that the total load (q) is 31 layers of non-woven which is 2 layers, with a length of geotextile (L) of 1.825 m. The safety factor geotextile method non-woven = 2.4.
ANALISIS KONDISI KERUSAKAN JALAN PADA PERMUKAAN PERKERASAN LENTUR MENGGUNAKAN METODE PCI SERTA ALTERNATIF PENANGANANNYA (Studi Kasus : Jl. Raya Papar Kertosono, Kab Kediri STA 0+000 – 3+000) Shafiul Oktavian; Laily Endah Fatmawati; Nurani Hartatik
Racic : Rab Construction Research Vol. 8 No. 1 (2023): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v8i1.3170

Abstract

Roads include land transportation facilities that are widely used for Indonesians in traveling near or far. The growth of globalization can also have an influence on the level of mobility which has an impact on vehicle users and continues to increase. This causes the volume load of vehicles to exceed the limits of the designed road class, so that the quality and age of the pavement will continue to decrease. This research was conducted to analyze the condition of road pavement damage to damage to the Jl. Raya Papar – Jl. Raya Minggir with a length of 3 km. The method used for this research is PCI (Pavement Condition Index) with the aim of finding values ​​based on the type, level and extent of damage to the method used and the selection of alternative treatments as a reference and road maintenance effort. The results of the research on the Jl. Raya Papar – Jl. Raya Minggiran STA 0+000 – 3+000 based on the PCI method obtains a total value of 47.6% Moderate (Fair) with the highest PCI value percentage of road conditions being 55% in Moderate road conditions (Fair), 25% in Bad road conditions (Poor), 8.3% on Good (Good) and Very Good (Very Good) road conditions, 3.4% on Very Bad (Very Poor) road conditions with alternative handling is periodic maintenance updates. Keywords : Road Damage, Road Conditions, PCI
ANALISIS SAFETY FACTOR LERENG DENGAN PERKUATAN CORRUGATED CONCRETE SHEET PILE BOZEM KALIDAMI SURABAYA Indra Wahyu Utomo; Laily Endah Fatmawati
Racic : Rab Construction Research Vol. 9 No. 1 (2024): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v9i1.4123

Abstract

In the field of geotechnical engineering, one of the most common causes of landslides is an increase in shear stress in the soil or a decrease in the shear strength of the soil mass so that it cannot withstand the applied load. Analysis of the slopes of Bozem Kalidami Surabaya was carried out to determine the safety figures for slopes reinforced with sheet pile retaining walls based on data obtained from boring tests. The sheet pile used is CCSP Type W-600 class B 19 meters long. Analysis of safety figures is carried out in two ways, namely manual calculation using the Fellinius method and the Plaxis v.8.2 program which aims to compare the results. Analyzed using manual calculations using the Fellenius method, the security value was 1.634. Meanwhile, for the results of the Plaxis v.8.2 program, the security value was 1.891. Because the calculation results obtained from both methods are >1.5, it can be concluded that the stability of the Bozem Kalidami Surabaya slope with CCSP Type W-600 class B reinforcement with a length of 19 meters is safety.
Analisa Kinerja Simpang 4 Tak Bersinyal Jl. Tambak Mayor Utara-Jl. Dupak Rukun-Jl. Asem Mulya Surabaya Mohammad Iqbal; Nurani Hartatik; Laily Endah Fatmawati
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.58485

Abstract

Roads are transportation insfrastructure that include all parts of the roads, including complementary buildings and equipment intended for traffic. Surabayais located and serves as the capital of East Java Province, With a  Population reaching 3,043 milion people’s in 2025 based on data from the Surabaya City Population and Civil Registration Office. Based on this topic, it is necessary to conduct a re-evaluation be analyzing the performance of an unsignalized four-way intersection using PKJI 2023. The research location  in on Dupak Rukun Street Surabaya, Focusing on intersection performance, using the manual traffic recording survey method. After observation and data analysis, it was found that the degree of saturation (DS) in the initial calculation was 0,8566, which falls into the congested category and causes traffic jams. Then, several adjustment were made by increasing the width oh the minor approach lanes from 6 to 7 meters and the major roads form 8 to 10 and 11 meters, resulting in a DS value of 0,8133.
Studi Eksperimental Kemampuan Biosementasi Bakteri Bacillus Subtilis Menggunakan Material Pozzolan Fly Ash untuk Pemadatan Tanah pada Tanah Lunak di Kecamatan Wonoayu-Sidoarjo Rafendi wahyutama; Laily Endah Fatmawati
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.58692

Abstract

Clay soils with high plasticity often pose challenges in construction due to their tendency to swell when wet and shrink when dry, resulting in low bearing capacity. This study investigates the effectiveness of soil stabilization using Bacillus subtilis bio-cementation combined with pozzolanic fly ash on soft clay in Wonoayu, Sidoarjo. Soil samples were collected at depths of 100–150 cm and prepared with varying proportions of fly ash (10%, 20%, and 30%) and bacterial suspension (3%). The stabilization performance was evaluated through the Proctor test to determine optimum moisture content (OMC) and maximum dry density (MDD). Results indicate that the addition of fly ash and Bacillus subtilis significantly reduced OMC while increasing MDD compared to natural soil. The most effective mixture was 30% fly ash and 3% Bacillus subtilis, yielding an OMC of 19% and MDD of 2.443 gr/cm³. These findings suggest that the combination of fly ash and Bacillus subtilis offers an efficient and environmentally friendly method for improving the compaction and mechanical properties of expansive clay soils.
Co-Authors Alfatoni Alfatoni Alfrido Josy Arvito Lende Ambar Andayani Andi Hendrawan Andi Patriadi Clarissa Rahma Anisadila D. Jupriono Dery Dwi Fitriansyah Divia Rahma Putri Gede Sarya Hartatik, Nurani Herry Widhiarto Indra Wahyu Utomo Matnor Aripindi Mohammad Iqbal Mohammad Rafii Tiara Manggala Mufid Afif Syafriansah Muhammad Islam Darmawan B Muhammad Izul Romadhoni Nuril Fikri Rafendi wahyutama Reva Ayundasari Ayundasari Saiful Anam Saiful Anam Laily Satria Jiro Jovian Shafiul Oktavian Siska Yovina Ervitasari Siska Yovina Ervitasari Siti Sekar Gondoarum Syaiful Fajar Yudi D. Prasetyo Yudi D. Prasetyo