Ay Lie Han
Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro Semarang

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Steel-Slag as Aggregate Substitute’s Influence to Concrete’s Shear Capacity an Experimental Approach Han, Ay Lie; Narayudha, Moga
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 16, Nomor 3, OKTOBER 2008
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v16i3.3696

Abstract

Penggunaan slag baja sebagai pengganti agregat kasar pada beton telah menunjukkan nilai-nilai positif seperti meningkatnya kuat tekan beton, perbaikkan kelacakan (workability) adukan segar dan pengurangan pencemaran logam berat dengan adanya proses solidifikasi dalam semen. Karena masa jenis beton slag juga meningkat, maka perlu diadakan penelitian lanjut tentang kemungkinan penggunaan beton-slag ini sebagai komponen struktural. Peningkatan kuat tekan beton yang seiring dengan peningkatan massa jenisnya membuka peluang penggunaan bahan ini sebagai elemen struktur yang tertumpu pada tanah, seperti misalnya balok basement, balok tie-beam dan rigid pavement. Namun demikian perilaku beton-slag terhadap respons geser (shear) belum diketahui dengan pasti. Uji laboratorium ini meneliti perilaku geser balok beton-slag yang diberi tulangan tunggal sedemikian sehingga pola kehancuran balok dipengaruhi oleh kehancuran gesernya. Hasil pengujian dibandingkan terhadap balok identik dengan agregat Pudak Payung sebagai elemen kontrol. Pengamatan terhadap balok-balok ini menunjukkan bahwa penggunaan slag meningkatkan kapasitas geser beton sebesar 11%, serta tidak terjadi pergeseran pada pola kehancuran. Kata kunci: Slag, Agregat Kasar, Kuat Tekan, Kapasitas Geser. ABSTRACT The use of steel slag as a substitute to natural aggregates for concrete increases the compression strength and workability of fresh concrete mixes. Furthermore, by solidification in the cement matrix, the pollution of heavy metals into soil and groundwater can be reduced significantly. The utilization of slag-concrete to be used as structural components need to be conducted especially since mass density increases as a function of slag percentage. Possible aspects are among others, basement components, tie-beams and rigid pavement elements. All these structures rest directly on supporting under layers, reducing their negative high mass-density effect. While compression and tensile behavior have been explored, the shear capacity of slag-concrete has yet to be investigated. This experimental work covers the behavior of singly reinforced concrete beams failing under shear mode. The result is compared to the controlling element, identical to the concrete-slag beam. The controlling beam uses Pudak Payung aggregates. The experimental research shows that the slag-concrete’s shear capacity increases 11% to the Pudak Payung concrete. The mode of failure however, remains the same.Keywords: Slag, Coarse Aggregates, Compression and Shear StrengthPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3696[How to cite: Han A.Y. dan Narayudha, M. (2008), Steel-Slag as Aggregate Substitute’s Influence to Concrete’s Shear Capacity an Experimental Approach, Jurnal Media Komunikasi Teknik Sipil, Tahun 16, Nomor 3, pp. 223-230]
Percobaan Tarik-Langsung pada Beton Konvensional Han, Ay Lie; Narayudha, Moga; Sabdono, Parang
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 12, Nomor 3, Edisi XXX, OKTOBER 2004
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v12i3.3889

Abstract

Although the tensile strength of concrete does not plays a predominant role in the analysis and design of concrete structures, the knowledge of concrete behavior under tension is of value when estimating the load level under which cracking will occur. The relation between compression and tensile strength is developed based on experimental results and is represented as a formula highly depending on the tensile testing method in the laboratories.  The Splitting Tensile Test and Flexural Strength Method are well know, while the Direct Tensile Test is relatively young, and its acknowledgement by ASTM under process.  The experimental research conducted at the Concrete and Structural Laboratory, Diponegoro University, Semarang tries to give a better view to the Direct Tensile Test for concrete.  This paper presents in brief, the indirect and direct testing methods, and evaluates the data obtained.Kata kunci : Kuat tarik beton, direct Tensile test, indirect test, kuat tekan betonPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3889[How to cite: Aylie, H., Narayudha, M., dan Sabdono, P., 2004, Percobaan Tarik-Langsung pada Beton Konvensional, Jurnal Media Komunikasi Teknik Sipil, Volume 12, Nomor 3, pp. 75-83]
Analysis of Flat Plate Structures by Equivalent Grid Method Nurhuda, Ilham; Han, Ay Lie
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 1, Edisi XXXI, PEBRUARI 2005
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v13i1.3898

Abstract

Penggunaan model lebar efektif balok untuk menganalisis struktur flat-plate yang dikenai beban lateral sudah sering dilakukan. Namun demikian, sampai saat ini model tersebut masih terbatas penggunaannya pada model-model struktur 2 dimensi. Analisis ini memperluas penggunaan model grid ekuivalen untuk menganalisis struktur secara 3 dimensi. Lebar efektif grid dianalisis secara empirik berdasarkan hasil eksperimen. Perilaku struktur ditinjau dengan melakukan analisis struktur secara linier dan non linier.Keywords: flat-plate, model, reinforced concretePermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3898[How to cite: Nurhuda, I. dan Ay Lie, H., 2005, Analysis of Flat Plate Structures by Equivalent Grid Method, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 1, pp. 71-79]
Waktu Ikat Adukan Beton dengan Pocket Penetrometer serta Korelasinya terhadap Nilai Slump Narayudha, Moga; Han, Ay Lie
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 3, Edisi XXXIII, OKTOBER 2005
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v13i3.3922

Abstract

Workability of concrete mixtures has direct impact to placing, compaction and density of hardened concrete.  To date the concrete industry has mandated the slump-value obtained by the Abrams-Harder method as the standard for evaluating concrete’s workability.  On the other hand, setting time of cement strongly influences the workability of mixtures.  A slump value of zero was identified as to be the initial setting time of mixture.  Research performed at the Material and Construction Laboratory, Diponegoro University, showed that actual setting time measured by mixture testing with the Pocket Penetrometer deviates significantly from the results of the Abrams test. Further, the effect of retarding admixtures to the workability of concrete mixtures, are evaluated.Keywords: Concrete mixture, Initial setting time, Pocket Penetrometer, Slump, AbramsPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3922[How to cite: Narayudha, M. dan Han, A.L., 2005, Waktu Ikat Adukan Beton dengan Pocket Penetrometer serta Korelasinya terhadap Nilai Slump, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 3, pp. 67-74] 
Concrete Recycling Han, Ay Lie
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 2, Edisi XXXV, JUNI 2006
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v14i2.3946

Abstract

Limbah benda uji beton yang tertimbun di Laboratorium Bahan dan Konstruksi, Fakultas Teknik Jurusan Sipil Undip setiap harinya mencapai kubikasi yang cukup tinggi.  Bahan ini merupakan komponen limbah industri yang dapat mempengaruhi tata guna lahan dan merupakan pencemar lingkungan.  Pada proses pembongkaran bangunan lama, volume limbah beton akan lebih besar lagi.  Berbagai usaha telah dilakukan untuk mendaur ulang atau memanfaatkan bahan limbah beton.  Salah satu alternatif yang dipandang baik secara struktur maupun dari segi ilmu lingkungan adalah mendaur ulang dan memakai kembali bahan agregat kasar yang berasal dari bahan beton.  Sifat fisis dan mekanis bahan agregat ini berbeda dengan bahan agregat asli yang berasal dari pemecahan batu.  Faktor-faktor yang sangat berpengaruh adalah kadar resapan yang tinggi, adanya sisa-sisa mortar yang menempel pada agregat dan variasi kualitas bahan dasar yang sulit ditentukan secara tepat.  Tulisan ini membahas perkembangan paling dini dalam bidang daur ulang agregat. Hasil-hasil penelitian yang dilaksanakan oleh Laboratorium Bahan dan Konstruksi, Fakultas Teknik Jurusan Sipil Undip akan di evaluasi secara singkat. Kata kunci: agregat daur ulang (RCA), kuat tekan, sifat-sifat agregat, ilmu lingkunganPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3946[How to cite: Han A.Y., 2006, Concrete Recycling, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 2, pp. 198-205]
Bond-shear Behavior of FRP Rods as a Function of Attachment Configuration Budipriyanto, Agung; Han, Ay Lie; Hu, Hsuan Teh
Journal of Advanced Civil and Environmental Engineering Vol 1, No 1 (2018)
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.1.1.9-17

Abstract

The use of external reinforcement to improve or enhances the flexural capacity of a member depends on the transfer capacity, and the failure behavior of the composite between the reinforcement, the epoxy resin and the concrete. The most influencing factor is the bond-shear capacity between the rod and the epoxy, and the epoxy to the concrete. Fiber Reinforced Polymer (FRP) rods are the latest alternate for fulfilling the external reinforcement scheme. In the field, the mandated embedment depth as outlined by the ACI 440 code, could customary not be achieved since factors such as the depth of the concrete cover, and presence of stirrups limits the space. This study is aimed to evaluate the effect of FRP rod configurations with respect to the concrete surface, to the effectiveness of external reinforcement. The study looked into the bond-shear capacity as well as the mode of failure, influence by the rod attachment depth. It was shown that the embedment depth significantly influenced the failure mode, and therefore the strain transfer capacity from the concrete to the rods.