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All Journal BANGUN REKAPRIMA

Lestari, Nor Puji

Unknown Affiliation

Author-ID : 2363400

Humanities Civil Engineering, Building, Construction & Architecture Education Engineering Other

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EFEKTIFITAS PENGGUNAAN BAHAN STABILISATOR BERBASIS POZOLAN PADA TANAH BERBUTIR HALUS DITINJAU DARI SIFAT FISIK DAN MEKANIS TANAH Lestari, Nor Puji; Nikmah, Anisatun; Harprastanti, Primasiwi; Sulistiawati, Baiq Heny
Bangun Rekaprima: Majalah Ilmiah Pengembangan Rekayasa, Sosial dan Humaniora Vol 8, No 1, April (2022): Bangun Rekaprima
Publisher : Politeknik Negeri Semarang

Kerusakan bangunan struktur maupun bangunan geoteknik lainnya banyak disebabkan oleh kondisi tanah dasar dimana konstruksi tersebut berdiri. Tanah yang baik akan berfungsi untuk menopang konstruksi diatasnya. Salah satu faktor yang menentukan daya dukung tanah adalah parameter kondisi tanah. Tidak semua jenis tanah memiliki karakteristik yang baik sehingga perlu usaha perbaikan tanah. Salah satu upaya untuk memperbaiki sifat tanah lempung tersebut dilakukan dengan stabilisasi tanah. Banyak bahan stabilisasi yang telah digunakan, antara lain semen dan bahan pozolan. Oleh sebab itu pada penelitian ini akan di tinjau efektifitas bahan berbasis pozolan untuk bahan stabilisator tanah. Metode yang digunakan pada penelitian ini adalah metode eksperimental. Tanah yang digunakan adalah tanah di desa Wirosari Kabupaten Grobogan. Kadar campuran yang digunakan adalah 16% dan 20% untuk bagasse ash maupun semen. Efektifitas penggunaan bahan campuran dilihat dari sifat fisik meliputi batas-batas konsistensi tanah dan sifat mekanis dengan uji pemadatan. Dari hasil pengujian dan analisis data diperoleh bahwa tanah asli termasuk jenis tanah berbutir halus kelompok A-7-5 dengan potensi pengembangan sedang. Nilai LL, PL dan PI berturut-turut adalah 77,3%; 60% dan 17,3%. Setelah dilakukan penambahan bahan stabilisator diperoleh tren yang sama untuk setiap campuran, yaitu LL menurun, PL meningkat dan PI menurun. Sedangkan pada sifat fisik kadar campuran tanah-bagase ash 16% memberikan nilai kepadatan yang lebih tinggi di banding campuran tanah semen. Tetapi jika kadar campuran ditambah tren kepadatan tanah akan menurun.

PENERAPAN IPTEK PADA PERENCANAAN ARSITEKTUR - GAMBAR DETAIL MASJID AL MA”™UN, BANYUMANIK KOTA SEMARANG Suwarto, Suwarto; Praharseno, Fikri; Buana, Lalu Yahya Surya; Lestari, Nor Puji; Mawardi, Mawardi; Suparman, Suparman; Wahjoedi, Wahjoedi
Bangun Rekaprima Vol. 8 No. 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Semarang

Kelurahan Pedalangan secara administratif berbatasan dengan Kelurahan Tembalang, Kelurahan Kramas, Kelurahan Padangsari, dan Kelurahan Srondol Wetan. Akibat adanya kawasan pendidikan di Kelurahan Tembalang, maka berdampak pula pada perkembangan wilayah di Kelurahan Pedalangan, baik dari segi perubahan lahan maupun pertumbuhan penduduk. Seiring dengan pertumbuhan penduduk yang pesat di Kelurahan Pedalangan maka harus diimbangi dengan peningkatan fasilitas umum di wilayah tersebut, Untuk memberikan fasilitas umum yang cukup bagi masyarakat di Kelurahan Pedalangan maka diperlukan peningkatan fasilitas ibadah, salah satu fasilitas ibadah yang perlu ditingkatkan khususnya pada wilayah RT/RW 03/03 Kelurahan Pedalangan adalah masjid. Alternatif yang di rencanakan oleh warga sekitar adalah pembangunan masjid baru akan tetapi, yang menjadi kendala adalah kurangnya pengetahuan warga masyarakat tentang peraturan pemerintah untuk mendirikan bangunan dimana lahan yang ada terdapat sumber air/Sendang. Untuk mengatasi hal tersebut, maka dilakukan inventarisasi kondisi lahan dan kebutuhan luas bangunan yang diperlukan.Target yang ingin dicapai dari kegiatan ini adalah memperiapkan Perencanaan Tampak bangunan dan anggaran yang diperlukan agar dapat dipersiapkan dan dicari sumber pendanaan dengan rembug warga masyarakat di Kelurahan Pedalangan khususnya masyarakat sekitar lokasi tentang Pembanguanan Masjid sebagai perkiraan dalam pelaksanaan pembangunan. Metode kegiatan yang direncanakan dimulai dengan diskusi dan musyawarah warga sosialisasi atau penyampaian hasil perhitungan desain struktur dan perencanaan rencana anggaran biaya. Sehingga diharapkan melalui kegiatan ini mampu memberikan manfaat bagi tim pengabdian masyarakat Polines (dosen) maupun bagi masyarakat sekitar.

OPTIMALISASI KANDUNGAN KAPUR PADA MATERIAL ORGANIK UNTUK MENINGKATKAN KUAT GESER TANAH Lestari, Nor Puji; Widoanindyawati, Vemi; Kusumastuti, Dianita Ratna; Triwardaya, Triwardaya; Marsudi, Marsudi
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5585

The main problems with soft soils are high moisture content, low soil mineral content, and high compressibility. The use of bacteria from organic materials to form lime compounds as adhesives in soft clay stabilisation has not been done. So this research is intended to improve the soil by stabilising soft clay soil with bacteria in organic materials.The method used in this research is experimental method. Variations of soybean powder mixture (organic material) used were 5 g/L, 10 g/L, 20 g/L, 30 g/L, and 40 g/L with reagent concentration of 1 mol/L. Furthermore, CBR (California Bearing Ratio) test specimens and Unconfine compressive test (UCS) specimens were made to determine the effect of the addition of lime compounds on soil strength. The concentration of 30 g/L produces optimum lime deposits. This is in line with the results of SEM and XRD tests. The UCS test showed that the soil cemented with lime produced the optimum shear strength at 14 days of curing, with a free press of 86.39 kPa. While for a period of more than 14 days the increase in the value of free compressive strength is relatively very small.

PENERAPAN TEKNOLOGI DALAM PENGELOLAAN PILAH SAMPAH RUMAH TANGGA DI JALAN BUKIT CEMARA INDAH XI RT 06 RW 13 KELURAHAN METESEH KECAMATAN TEMBALANG Buana, Lalu Yahya Surya; Praharseno, Fikri; Suwarto, Suwarto; Lestari, Nor Puji; Ariyanto, Arief Subakti; Mawardi, Mawardi; Suparman, Suparman; Wahjoedi, Wahjoedi; Parhadi, Parhadi; Devilito, Rio
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5493

Waste is the remains of daily human activities and/or from natural processes in solid form, and the source of waste is the initial/first place where the waste is. Based on the chemical properties of waste it is grouped into two types, namely organic waste which consists of organic compounds (carbon, hydrogen, oxygen and nitrogen and are quickly decomposed/weathered) come from living/dead things. The second type is inorganic waste which consists of non-organic materials (difficult to be decomposed by soil microorganisms) so it is durable and does not decompose easily. This article contains a report on the implementation of community service regarding the application of technology in managing household waste sorting on Jalan Bukit Cemara Indah XI RT 06 RW 13 Meteseh Village, Tembalang District, Semarang City. The aim of this service is to provide guidance by means of mentoring and counseling in managing waste sorting in the community. The method used consists of three stages which include (1) the observation and needs analysis preparation stage, (2) the implementation of the service process, (3) the service finalization and evaluation stage. The result of this service is the implementation of assistance in waste sorting management which is supported by the construction of a waste sorting place for the community on Jalan Bukit Cemara Indah XI RT 06 RW 13, Meteseh Village, Tembalang District, Semarang City.

PEMODELAN PENINGKATAN KADAR AIR AKIBAT INFILTRASI DITINJAU DARI PARAMETER KEKUATAN TANAH Lestari, Nor Puji; Suwarno, Anung; Mulyono, Tedjo; Sudarmono, Sudarmono; Praharseno, Fikri; Wicaksono, Teguh Mulyo
Bangun Rekaprima Vol. 9 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Semarang

Tanah merupakan salah satu aspek penting dalam konstruksi yang memerlukan perhatian saat perencanaan yang berhubungan dengan daya dukung pondasi, stabilitas lereng, tekanan tanah lateral serta bangunan sipil lainya. Sehingga banyak kejadian kegagalan struktur geoteknik terjadi saat kondisi tanah paling kritis. Oleh sebab itu, penelitian ini dirancang untuk mempelajari bagaimana pengaruh variasi kadar air terhadap kekuatan tanah pada kondisi normal dan jenuh sempurna. Metode yang digunakan pada penelitian ini adalah metode eksperimental di Laboratorium Mekanika Tanah Politeknik Negeri Semarang. Peningkatan variasi nilai infiltrasi dilakukan dengan cara merendam sampel tanah dalam cawan. Setelah dilakukan pemeraman, kemudian sampel tanah diuji triaksial UU. Penelitian menunjukkan bahwa pada awal penjenuhan penyerapan air maksimum akan tercapai (19,6%) dan akan berkurang sebanding dengan lama penjenuhan. Nilai kadar air bertambah mendekati nilai 100% saat penjenuhan berlangsung selama 10 hari. Parameter kuat geser tanah (kohesi) akibat penjenuhan sebesar 0,39 kg/cm2; 0,28 kg/cm2 dan 0,35 kg/cm2. Sedangkan semakin jenuh tanah maka nilai sudut gesek dalam tanah juga menurun mendekati nilai nol, yaitu 11,80o; 12,17o dan 2,76o. Bertambahnya nilai kadar air pada tanah mengakibatkan menurunnya nilai kohesi dan sudut gesek dalam pada tanah. Semakin jenuh tanah (semakin lama penjenuhan) maka sudut gesek dalam tanah mendekati nol dan kohesi tanah lebih kecil dibanding kondisi tanah asli. Sehingga semakin jenuh tanah maka nilai daya dukung tanah tersebut semakin kecil.

PENGARUH PRELOADING TERHADAP LAMA WAKTU KONSOLIDASI PADA TAHAP PRECONSTRUCTION STUDI KASUS PESISIR KOTA SEMARANG: PENGARUH PRELOADING TERHADAP LAMA WAKTU KONSOLIDASI PADA TAHAP PRECONSTRUCTION STUDI KASUS PESISIR KOTA SEMARANG Widoanindyawati, Vemi; Lestari, Nor Puji; Triwardaya; Kusumastuti, Dianita Ratna; Marsudi; Amal, Andi Syaiful; Sulistiawati, Baiq Heny
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6532

The problem of soft clay soil is currently one of the most worrying soil problems due to the increasing use of soft soil areas for construction needs. The main problem with soft clay soil is its nature which easily absorbs water but is difficult to release the water. The large amount of soft soil in the coastal area of Semarang City implies that in the construction process in the area, it is necessary to consider consolidation reduction. Soft clay soil takes a long time to reach 90% consolidation. This is because the permeability of soft clay soil is very small so that the process of dissipating water out is quite long. This dissipation process can be accelerated using engineering techniques, one of which is preloading. This process will further accelerate the consolidation process. This study was conducted to obtain the optimization of the embankment area against land subsidence on the coast of Semarang City using the numerical analysis method. From the research results, various variations were obtained for the area of embankment for a soil depth of 20 meters with a size of 30 x 30, the decline that occurred was 1.37 cm, a size of 40 x 40, the decline that occurred was 1.552 cm, a size of 50 x 50, the decline that occurred was 1.772 cm. While for the sea decline according to Steinbener

PENERAPAN IPTEK UNTUK PEMBANGUNAN GREEN HOUSE PEMBIBITAN PADA PROGRAM URBAN FARMING DI RT 06 RW 13 JALAN BUKIT CEMARA INDAH XI KELURAHAN METESEH KECAMATAN TEMBALANG SEMARANG: PENERAPAN IPTEK UNTUK PEMBANGUNAN GREEN HOUSE PEMBIBITAN PADA PROGRAM URBAN FARMING DI RT 06 RW 13 JALAN BUKIT CEMARA INDAH XI KELURAHAN METESEH KECAMATAN TEMBALANG SEMARANG Buana, Lalu Yahya Surya; Praharseno, Fikri; Suwarto; Lestari, Nor Puji; Ariyanto, Arief Subakti; Sulaiman, Sriwahyuningsih; Suparman; Wahjoedi; Parhadi; Devilito, Rio
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6578

Urban farming is an effort to maintain resilience in the capital city of Central Java. The Semarang City Government continues to be committed to improving the quality of regional development with benchmarks from aspects of development achievement, quality aspects, document preparation aspects, and innovation aspects. In 2023, the Semarang City Government will carry out program innovations such as the Food Startup Challenge, Urban farming Corner, Rumah Gizi Pelangi Nusantara, and Sekolah Berkebun which will be included in the assessment of the Regional Development Awards (PPD) for Regency/City at the Central Java Province level. In carrying out this innovation, the Semarang City Government also encourages the involvement of all levels of society, especially women's groups and children through the curriculum in schools. This urban farming can support nutritional improvements for stunted children in the City of Semarang. As is known, the City of Semarang has succeeded in scoring a hat trick as the first best city in the Regional Development Awards or PPD for 3 consecutive years (2019, 2020, 2021) both at the Central Java Province and national levels. One of the activities that can support the urban farming program is the availability of green houses for plant nurseries in the RT, RW, and sub-district sectors. The construction of green houses for nurseries is very important for the community, especially residents of RT 06, Meteseh Village, so that they can produce plant seeds independently and can carry out planting activities or movements carried out by the Semarang city government

STUDI EKSPERIMEN KUAT LEKAT LEM PADA PASANGAN BETON RINGAN: STUDI EKSPERIMEN KUAT LEKAT LEM PADA PASANGAN BETON RINGAN Wiguna, Edo; Mahbub, Jamal; Lestari, Nor Puji; Setiawan, Adi; Larassati, Dian Sukma
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6799

In modern construction, lightweight bricks are increasingly used as an alternative building material due to their advantages in terms of light weight, ease of installation, and energy efficiency. However, the strength of structures formed from lightweight brick masonry is highly dependent on the quality of the bond between the elements, particularly the use of adhesives such as construction glue. One crucial factor determining the bond strength is the configuration and length of the bonding surface used. This study aims to evaluate the effect of the number of bonding rows on the adhesive bond strength of lightweight brick masonry. Testing was conducted experimentally using one- and two-row bonding configurations. Each sample was subjected to compressive force through a 24.4 mm diameter cylindrical press. Results showed that the two-row configuration produced a higher bond strength, but with a larger coefficient of variation, indicating lower stability of the results. Increasing the bond length actually tended to decrease the bond strength, likely due to uneven distribution of glue and pressure. Furthermore, all test specimens fractured in the brick body, not at the bonding surface, indicating that the adhesive strength had exceeded the tensile strength of the lightweight brick. Regression analysis showed a very strong relationship between compressive force and bond strength, indicating that applied pressure was the dominant factor in bond effectiveness.

Co-Authors Andi Syaiful Amal Anung Suwarno, Anung Ariyanto, Arief Subakti Buana, Lalu Yahya Surya Devilito, Rio Dianita Ratna Kusumastuti Fachry Abda El Rahman Hapzi Ali Harprastanti, Primasiwi Larassati, Dian Sukma Mahbub, Jamal MARSUDI Marsudi Marsudi Mulyono, Tedjo Nikmah, Anisatun Parhadi Parhadi Parhadi, Parhadi Praharseno, Fikri SUDARMONO SUDARMONO Sulaiman, Sriwahyuningsih Sulistiawati, Baiq Heny Suparman Suparman Suparman Suwarto Suwarto Triwardaya Triwardaya Triwardaya, Triwardaya Vemi Widoanindyawati Wahjoedi Wahjoedi Wahjoedi Wicaksono, Teguh Mulyo Wiguna, Edo

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