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<![CDATA[PRESS STRONG CONCRETE ADDED SHELL OF KEONG SAWAH ]]>
<![CDATA[Gumilang, Pandu Dimas]]>;
<![CDATA[Safarisky, Hendramawat Aski]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>
<![CDATA[ ASTONJADRO Vol. 10 No. 1 (2021): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v10i1.3986
<![CDATA[Concrete is a building structure whose development is relatively fast because it is an important part of development. Shells of keong sawah, which are pests for rice plants, can also be used as an added material in making concrete because they contain a large amount of calcium carbonate. This study aims to determine the effect of adding shells of keong sawah on the compressive strength of concrete with a variation of 0% and 15% on the weight of cement. This research was conducted using a cylindrical concrete specimen with a diameter of 15 cm and a height of 30 cm. The results showed that the addition of 15% powder shells of keong sawah had an increase in compressive strength, namely 31.1 MPa when compared to the 0% variation with a compressive strength value of 25.6 MPa. It can be concluded that in this study the addition shells of keong sawah 15% by weight of cement can increase the compressive strength of the concrete. ]]>
<![CDATA[Durability of Concrete Based on the Remaining Life of the Building Case Study: Reinforced Concrete in Klaten District ]]>
<![CDATA[Widodo, Slamet]]>;
<![CDATA[Aski Safarizki, Hendramawat]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>
<![CDATA[ ASTONJADRO Vol. 11 No. 3 (2022): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v11i3.7848
<![CDATA[Concrete durability is the ability of concrete to last as it was originally planned, in the structure of a building can be defined as the ability to maintain function, stability and aesthetics due to environmental influences so as not to incur large maintenance and repair costs during the planned service life. The durability aspect is very important, especially for infrastructure that has a fairly long service life. Building life is the period or time during which a structure is required to continue to function as planned. In building structures whose construction has been completed, both new and old buildings, specific data related to the quality of the concrete and the planned age of the building is quite difficult to obtain, this is because the influence during the implementation of construction is also not good in governance. documentation, both technical documents and other non-technical documents, therefore it is necessary to have a sufficiently representative tool to test the concrete quality of a building that has been completed to comply with the quality of the built concrete.]]>
<![CDATA[Structural Performance Towards Dynamic Earthquake Spectrum Response According to SNI 1726-2012 and SNI 03-1726-2019 (Study Case Hospital Building ini Solo) ]]>
<![CDATA[Listiana, Icho Dharma Tri]]>;
<![CDATA[Safarizki, Hendramawat Aski]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>
<![CDATA[ ASTONJADRO Vol. 13 No. 2 (2024): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v13i2.12770
<![CDATA[Tectonic earthquakes are a type of earthquake that can cause significant damage compared to other earthquakes. These tectonic earthquakes often occur in Indonesia, considering that geographically Indonesia is located between active earth plates. So that in earthquake-prone areas it is necessary to plan earthquake-resistant building structures, this is done so that if an earthquake occurs the building does not suffer significant damage. The dynamic response spectrum analysis method produces the base shear and displacement of the structure. The response spectrum is a spectral plot presented as a plot or graph between periods of oscillation of a T-structure, as a function of the maximum response to a certain attenuation rate and seismic load. This study aims to determine a structural response with 3D modeling on a hospital structure in the city of Solo. The study was conducted to determine the effect of the earthquake on the performance of the structure which was analyzed with reference to the regulations of SNI 03-1726-2012 and SNI 03-1726-2019. The modeled building consists of floor slabs, beams and columns, each of which is structurally load refers to the regulations of SNI 1726-2012 and SNI 03-1726-2019 as a comparison which one is more effective. The results obtained from the use of SNI 03-1726-2012 on building structures have better safety performance when compared to analysis with SNI 03-1726-2019.]]>
<![CDATA[Laboratory Tests of the Area of Head Joints and Bed Joints Increase the Diagonal Shear Stress of Brick Walls ]]>
<![CDATA[Marwahyudi, Marwahyudi]]>;
<![CDATA[Rifai, Muhammad Dian]]>;
<![CDATA[Ahwan, Ahwan]]>
<![CDATA[ ASTONJADRO Vol. 13 No. 2 (2024): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v13i2.14938
<![CDATA[The strength of a brick wall is influenced by the failure of the mortar bond and the resistance of the bad joint and head joint when carrying the force. The wider the head joint and bad joint areas result in a wider bonded area which increases the diagonal shear strength of the wall. Residential walls that have increased ability to withstand diagonal shear forces will be more stable when subjected to earthquake lateral forces. This research formulates that the wider the connecting area of the body and head joint, the higher the diagonal shear strength. The test was carried out by making a square test object measuring 60 x 60 cm. then pressure is applied in the diagonal direction. At the time of setting up the test object is done carefully and thoroughly. The test object is positioned perpendicular to the diagonal direction. The test object is placed absolutely perpendicular and is given a load until it is completely damaged. Loading method by providing a force that increases regularly until the structure experiences a complete failure. The bonded area in each brick shape is measured and compared with the results of the diagonal shear strength. This value is analyzed to obtain the effect on the diagonal shear strength. The percentage effect of each brick shape is compared and the results are analyzed. The results of the analysis are to obtain justification whether the area of the bad joint and head joint affects the diagonal shear strength. The novelty of this research is to obtain several brick designs that increase the strength of the diagonal shear stress. Tests show that the greater the area of the head joint, the greater the value of the diagonal shear stress.]]>
<![CDATA[Compressive Strength and Water Absorption of Batako Made from Additional Plastic Waste of Polyethylene Terephthalate (PET) ]]>
<![CDATA[Pratama, Romero Adi]]>;
<![CDATA[Devi, Rida Handiana]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>;
<![CDATA[Haryono, Yusuf Ramadhan]]>
<![CDATA[ ASTONJADRO Vol. 14 No. 3 (2025): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v14i3.18890
<![CDATA[Plastic has become an inseparable material from human daily life. Plastic waste has properties that are very difficult to decompose which has a negative impact on the environment, which has become a serious problem in the global context. One alternative for dealing with plastic waste that can be applied in the world of civil engineering is by reusing plastic waste as aggregate in making bricks. This research aims to determine the effect of using polyethylene terephthalate (PET) plastic waste as a partial substitute for fine aggregate in making bricks on compressive strength and water absorption. In this research, variations in the use of PET plastic waste were 0%, 5%, 10% and 15%, referring to SNI-03-0349-1989. Compressive strength tests have respective values of 7.5 Mpa, 6.3 Mpa, 6.2 Mpa, and 5.7 Mpa. In the water absorption test, the respective values were 4%, 4.3%, 4.7% and 7%. Adding too much plastic to the brick mixture proved to be ineffective on the compressive strength of the brick. This means that the mortar and PET plastic on the bricks cannot interlock with each other.]]>
<![CDATA[PEMANFAATAN SAMPAH BOTOL KACA MENJADI KARYA SENI GUNA MENINGKATKAN KREATIVITAS DALAM MENGELOLA SAMPAH ]]>
<![CDATA[Kristiana Seftianingsih, Dina]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>
<![CDATA[ Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 1 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Tapanuli Selatan ]]>
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DOI: 10.31604/jpm.v8i1.251-258
<![CDATA[Sampah merupakan salah satu masalah yang sering dipersoalkan oleh masyarakat yang kurang memahami pentingnya pengelolaan sampah yang baik dan benar. Masyarakat perlu dibekali pengetahuan tentang jenis sampah yang dapat dimanfaatkan dan sampah yang harus dimusnahkan. Diperlukan usaha untuk menggugah kesadaran dan kepedulian masyarakat terhadap masalah sampah di lingkungan sekitar khususnya sampah yang berbahan kaca, yaitu jenis sampah anorganik. Kegiatan pengelolaan sampah anorganik menjadi produk karya seni memberikan solusi untuk mengatasi masalah tersebut. Melalui program kegiatan pembuatan produk vas bunga dari sampah botol kaca dapat memberikan pengetahuan untuk masyarakat agar lebih kreatif dan terampil terutama dalam mendaur ulang sampah botol minuman kemasan berbahan kaca khususnya untuk warga Kampung Karangasem Condongcatur Yogyakarta. Metode yang digunakan dalam kegiatan ini adalah pelatihan dan praktik langsung membuat kreasi karya seni produk vas bunga dari sampah botol kaca. Kegiatan pelatihan ini dapat membantu mengurangi masalah pencemaran lingkungan dan dapat memberikan dampak yang baik bagi warga untuk tetap sadar diri akan kebersihan lingkungan sekitar. Salah satu manfaat dari kegiatan pelatihan ini diharapkan dapat membantu peluang usaha kreatif kepada warga untuk dapat menjual hasil produk karya seni tersebut sebagai usaha untuk meningkatkan perekonomian masyarakat.]]>
<![CDATA[Addition of Cold Milling Waste to Increasing Compressive Strength and Water Absorption in Batako ]]>
<![CDATA[Syahputra, Damario Aji]]>;
<![CDATA[Devi, Rida Handiana]]>;
<![CDATA[Marwahyudi, Marwahyudi]]>
<![CDATA[ ASTONJADRO Vol. 14 No. 4 (2025): ASTONJADRO ]]>
Publisher : <![CDATA[Universitas Ibn Khaldun Bogor ]]>
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DOI: 10.32832/astonjadro.v14i4.18900
<![CDATA[The development of construction in Indonesia drives the need for more efficient and environmentally friendly building materials. One of the proposed innovations is the utilization of cold milling asphalt waste as a mixture of fine aggregate in making bricks. This study aims to determine the effect of variations in the addition of asphalt waste on the compressive strength and water absorption of bricks. The problems raised in this study include how variations in the addition of asphalt waste to bricks affect their mechanical properties. The study was conducted experimentally by making 12 brick samples measuring 30 x 15 x 10 cm using variations in asphalt waste mixtures of 0%, 20%, 25%, and 30%. Testing included compressive strength and water absorption tests at the ages of 7 and 28 days. The results showed that the addition of asphalt waste affected the characteristics of bricks. In a mixture of 30%, bricks showed the highest compressive strength value of 7.9 MPa after 28 days, while water absorption increased with increasing percentage of asphalt waste. These results indicate that asphalt waste can be used as a partial substitute for sand in making bricks without significantly reducing their structural strength. The novelty of this research lies in the use of cold milling asphalt waste which has not been widely applied to brick materials. This study concludes that cold milling asphalt waste can be used as a mixture in brick production to reduce construction waste while supporting the concept of sustainable development. This innovation provides a solution for construction entrepreneurs in creating more economical and environmentally friendly products.]]>
<![CDATA[Aesthetic Analysis Of Sustainable Design Principles in Modern Residential Interiors ]]>
<![CDATA[Dina Kristiana Seftianingsih]]>;
<![CDATA[Dian Muhammad Rifai]]>;
<![CDATA[Nadila Dwi Koes Sumaningtyas]]>;
<![CDATA[Marwahyudi Marwahyudi]]>
<![CDATA[ Proceeding of the International Conference on Electrical Engineering and Informatics Vol. 1 No. 1 (2024): January : Proceeding of the International Conference on Electrical Engineering ]]>
Publisher : <![CDATA[Asosiasi Riset Teknik Elektro dan Informatika Indonesia ]]>
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DOI: 10.62951/iceei.v1i1.45
<![CDATA[This study aims to analyze the application of sustainable principles in modern residential interior design and focuses on aesthetic aspects. With increasing attention to environmental sustainability issues, interior design plays an important role in reducing environmental impacts through the selection of environmentally friendly materials, efficient energy use, and space optimization. However, the aesthetic aspect cannot be separated from design, because it plays a role in creating visual comfort and occupant well-being. This study uses a qualitative descriptive method with an interdisciplinary approach, which includes literature reviews, design analysis, and case studies on several interior projects that have successfully combined sustainable and aesthetic principles. The results of the study show that interior design that considers sustainability not only focuses on energy efficiency and the selection of environmentally friendly materials, but also integrates aesthetic elements that enhance the comfort of the space. These findings emphasize the importance of public and designer awareness in creating functional, environmentally friendly, and aesthetic spaces. This study is expected to provide theoretical and practical contributions to the development of interior design that supports sustainability without sacrificing the aesthetic quality and comfort of the space.]]>
<![CDATA[BETON RAMAH LINGKUNGAN DENGAN ABU SEKAM PADI SEBAGAI PENGGANTI SEBAGIAN SEMEN PADA ERA NEW NORMAL ]]>
Hendramawat Aski Safarizki;
<![CDATA[Marwahyudi Marwahyudi]]>;
<![CDATA[Wahyu Aji Pamungkas]]>
<![CDATA[ Jurnal Riset Rekayasa Sipil Vol 4, No 2 (2021): Maret 2021 ]]>
Publisher : <![CDATA[Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta ]]>
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DOI: 10.20961/jrrs.v4i2.42978
<![CDATA[Dalam era new normal ini terjadi perlambatan kegiatan konstruksi di Indonesia. Hal ini disebabkan pengaruh arus transportasi barang material konstruksi yang terhambat. Beton merupakan komponen utama dalam suatu bangunan terutama pada bagian struktur. Bahan penyusun beton terus mengalami perkembangan dan transformasi sesuai perkembangan jaman. Pengembangan inovasi komponen beton perlu dilakukan untuk mengikuti kondisi yang ada saat ini guna mengurangi pemakaian semen yang berlebihan. Seperti yang kita ketahui bahwa proses pembuatan semen menghasilkan panas yng cukup tinggi. Pengurangan panas ini dilakukan dengan pengurangan pemakaian semen yang berlebihan. Salah sayu cara dengan pemanfaatan abu sekam padi. Pemanfaatan abu sekam padi untuk campuran beton dapat dijadikan alternatif ramah lingkungan dalam kondisi era new normal saat ini. Berapa komposisi penambahan optimum abu sekam padi untuk mencapai kuat tekan optimum beton adalah tujuan dari penelitian ini. Agar penelitian ini berjalan sesuai rencana maka diperlukan metode penelitian. Metode yang di gunakan adalah penelitian destruktif laboratoris mengunakan sampel benda uji. Pembuatan bendauji dibedakan berdasarkan kadar yang sudah ditentukan. Penggunaan kadar abu sekam padi untuk campuran beton yang digunakan adalah 8%, 9%, 10%, 11%, dan 12%. Sampel silinder beton benda uji pada penelitian iniberukuran diameter 15 cm dan tinggi 30 cm dimana pengujiandilakukan pada umur silinder beton 28 hari. Hasil analisis menunjukan beton abu sekam adanya peningkatan kuat tekan pada variasi kadar abu sekam padi 10% menjadi 25,70 MPa dibandingkan beton normal tanpa sekam padi sebesar 22,39 MPa. Dapat disimpulkan bahwa penggunaan abu sekam padi dapat mengurangi jumlah semen pada campuran beton untuk mencapai kuat tekan yang lebih tinggi.]]>
