Studi Eksperimental Pengaruh Penambahan Abu Sekam Padi Nano Dan Bahan Tambah Superplasticizer Terhadap Kuat Tekan Beton

This research aimed to investigate effect of using nano materials rice husk ash and superplasticizer admixture to concrete compressive strength. Nano rice husk ash used as subtitute of pozzolan portland cement. Production of nano rice husk ash use Planetary Ball Milling with duration of milling for 1 hour. To determine effect of using nano materials rice husk ash dan superplasticizer admixture used variation percentage of materials nano rice husk ash such ash 5%, 10%, and 15% with or without superplasticizer admixture. Tests were conducted at 28 days with uniaxial loading (one-way). Result of this research indicate normal concrete without substitution of nano rice husk ash and without superplasticizer have highest of concrete compressive strength. Concrete with rice husk ash decreased in compressive strength because of rice husk ash absorb much water and increase the length of hydration process of cement in concrete mix. Although there is a decrease through this research is expected, nano techonology in civil engineering can more developed

Perencanaan Struktur Gedung Menara Bri Semarang

The structural of BRI tower building Semarang is designed in seismic zone of Semarang city, which is designed by using the Special Moment Resisting Frame System (SMRFS) based on ”Indonesian Concrete Code (SNI 03-2847-2002)”, while the analysis of earthquake load uses response spectrum method based on “Indonesian Seismic Code(SNI 03-1726-2012). The design structural of BRI tower building Semarang using“Capacity Design” concept. As for using this concept has purpose what if strong earthquake happens, that cause forms plastic hinge on structural elements which is desired appeared on the beams. To guarantee plastic hinge happens on the beams, so the columns must be designed stronger than the beams (Strong Column Weak Beam Concept). The analysis of the structure is using SAP2000 computer program version 14. As the result of calculations showed that structural element of BRI tower building is safe based on analyze

Studi Eksperimental Pengaruh Konfigurasi Sengkang Pada Daerah Tekan Balok Beton Serat Bertulang

Concrete has relatively high compressive strength, in other hand higher concrete compression give more brittle of failure. There are several methods for improvement such as addition steel-fiber in concrete mix and confinement in the compression zone. This study present a further study on the influence of addition 0.5% steel-fiber of concrete volume to concrete mix and three specimen fiber concrete beams ware evaluated with three stirrup configuration (BF1, BF4, BF5) that concentrated in the compression zone. The study's analyze using a pure beding test with 2 point load of a simply supported beam. The variation of stirrup configuration concentrated at pure beding moment zone of beam. The result of this study, the addition of steel-fibers to the concrete mix increased the cylinder compression strength by 11,96%, The moment capacity of BF4 increased by 0,96% compered to BF1 in other hand the specimen BF5 reduce by 4,1% compered to BF1 ,The Stiffnes of BF4 increased 132,64% and BF5 increased by 25,44% compared to BF1,The Ductility of specimen BF4 increased by 148,01% and BF5 increased by 3.97% compared to BF1

Penelitian Kuat Lentur Balok Susun Dari Kayu Glugu Dan Kayu Sengon

Kayu adalah bahan bangunan yang sering digunakan pada bangunan. Kayu keruing adalah salah satu jenis kayu yang banyak digunakan, namun harganya relatif mahal. Kayu glugu dan kayu sengon dapat menjadi bahan bangunan alternatif untuk menggantikan penggunaaan kayu keruing karena populasinya yang tinggi. Pengembangan teknologi yang digunakan dalam penelitian ini adalah balok kayu tersusun, dimana beberapa kayu dengan dimensi penampang tersendiri digabungkan menjadi satu penampang baru dengan cara direkatkan. Pada penelitian ini pengujian yang dilakukan adalah pengujian lentur full scale one point load. Hasilnya adalah kuat balok susun dapat melebihi kayu keruing sehingga dapat menggantikan kayu keruing yang digunakan sebagai elemen lentur. Benda uji berupa balok susun yang terdiri dari kayu glugu dan sengon berbentuk I (BS 1), balok susun dari kayu glugu dan sengon berbentuk persegi panjang (BS 2), balok susun 2 dari kayu glugu (G), balok susun 4 dari kayu sengon (S) dan balok dari kayu keruing (K). Balok susun kayu memiliki rasio luasan mendekati rasio luasan balok kayu keruing dengan ukuran 8 cm x 12 cm dan bentang bersih sepanjang 2 meter untuk kemudian dibandingkan kuat lenturnya. Pengeleman balok susun menggunakan lem bertipe Polivynyl Asetat (PVAc) yang relatif mudah didapat dengan merk FOX. Hasil pengujian pada benda uji balok susun kayu terbaik didapatkan dari benda uji balok susun 2 dari kayu glugu sebesar 24,674 KN yaitu lebih besar 7,605% dari beban maksimal rata-rata kayu keruing yaitu 22,93 KN. Biaya pembuatan benda uji glugu hanya sebesar 72,6% dari biaya kayu keruing pasaran di kota Semarang

Studi Eksperimental Pemberian Tegangan Awal Pada Dinding Batako Tanpa Plester Dan Tanpa Perekat (Btptp) Dalam Menerima Beban

Before the development of the framework structure (using beams and columns), loadbearing wall structure with loads that will work on the building structure bestowed on the walls commonly used in the community. One form loadbearing wall structure is commonly used arrangement brick wall. Adobe is a brick made by printing and maintaining in a damp atmosphere, tras mix, lime and water with or without other additives. One brick technology that has been developed is the use of brick without plaster and adhesives. The composition brick wall has a good ability in resisting axial forces but weak in resisting lateral forces. One of the solutions used to improve the ability of the composition of the brick wall is the lateral force resist giving the initial prestressing force (prestressed) through fastening reinforcement (via tightening bolts). Prediction failure of brick wall composition into focus the problem in this research. Experimental testing in the laboratory, carried out to see the damage that occurs in the form of brick walls in receiving loads (axial and axial-lateral). Abaqus (Simulia 6.10.1) Explicit is used as validation in predicting the form of failure that occurs in the composition of the brick Wall which receives load