This study aims to determine the comparison of time and installation cost of each m2 wall of MU adhesive brick with red brick mixture of 1 Pc: 5 Ps in Sleman DIY in 2016. This research uses experimental approach. The place of research is carried out in Bengkel Batu Department of Civil Engineering Education and Planning Faculty of Engineering UNY. The sample in this study was taken as much as 3 pieces of work pair with ukurang long pair 2 meters and 1 meter height for each pair of hebel and brick. The data of the research are analyzed descriptively with comparative approach. The result of this study is the comparison in terms of installation time per m2 wall of MU adhesive lightweight brick 1.7 times faster than the red brick pairs with a mixture of 1 PC: 5 PS (1.7: 1), the installation cost per m2 of wall from Lightweight brick with MU adhesive Rp 92.100,00 while brick Rp 60.146,00.Keywords: brick, hebel, wall ABSTRAKPenelitian ini bertujuan untuk mengetahui perbandingan dari segi waktu dan biaya pemasangan tiap m2 dinding dari bata ringan perekat MU dengan bata merah campuran 1 Pc : 5 Ps di Kabupaten Sleman DIY tahun 2016. Penelitian ini menggunakan pendekatan eksperimen. Tempat penelitian dilaksanakan di Bengkel Batu Jurusan Pendidikan Teknik Sipil dan Perencanaan Fakultas Teknik UNY. Sampel dalam penelitian ini diambil sebanyak 3 buah pekerjaan pasangan dengan ukurang panjang pasangan 2 meter dan tinggi 1 meter untuk tiap pasangan hebel dan batu bata. Data hasil penelitian dianalisis secara deskriptif dengan pendekatan komparatif. Hasil dari penelitian ini adalah perbandingan dari segi waktu pemasangan tiap m2 dinding dari bata ringan perekat MU 1,7 kali lebih cepat dibandingkan dengan pasangan bata merah dengan campuran 1 PC : 5 PS (1,7 : 1), biaya pemasangan tiap m2 dinding dari bata ringan dengan perekat MU sebesar Rp 92.100,00 sedangkan batu bata Rp 60.146,00. Kata kunci: batu bata, hebel, pasangan dinding
Concrete structures reinforced with steel formed an important part of recent infrastructures. Today, the rate of use of cement is higher than 40 years ago. An approximation amount of 11 billion metric ton of cement per year has been consumed in the whole world. The aims of this research are: (1) to obtain the durability value of concrete with PPC Premium Cement and PPC Non-Premium Cement, (2) to obtain the degree of comparison of concrete durability, (3) to obtain the durability parameters. This research based on ASTM International standards, conducts in 224 days non-stop, to obtain following data: (1) compressive strength, (2) rebound number, (3) pulse velocity number, (4) modulus of rupture, and (5) corrosion rate. The test result: (1) PPC Premium cement give a relatively good performance rather than PPC Non-Premium cement. This is based on both destructive and non-destructive test, (2) the modulus of rupture’s value also giving the PPC Premium cement act relatively good than PPC Non-Premium cement, (3) test on severe environment, concrete treatment by mean of waterproofing proved to be effective to reduce the rate of steel destruction., (4) on a practical use, cement with high fineness modulus can give a better performance.
Concrete structures reinforced with steel formed an important part of recent infrastructure. The combination of high strength properties on concrete and high tensile on steel provide an ideal composite material that offered wide application compare with other material on structural engineering. Buildings, bridges, piers, tanks and pipe, can be made from reinforced concrete. The aim of this research is to discover the durability of reinforced concrete beam on severe environment. This research conducted based on ASTM G-109 and Florida Test of Method FM 5-222. The method used on this research is DC Electrochemical Method with impressed current technique. The test conducted 120 days to gain beam flexural strength. The results show (1) there are two conditions on the beam, i.e.: (a) the beam is put based on compressive strength, and (b) the beam is put based on different salt content, (2) both conditions doesn’t give much effect on beam flexural strength, (3) the beam increased as the time goes by and the increasing compressive strength, (4) the not-affected beam is suspected because un-perfect conditioning process, (5) the forced-corrosion process is not run well because the solution can’t seep into the beam, (6) the gained flexural strength parameter is not depicted the condition of reinforced concrete on severe environment.Keywords: concrete beam, durability, severe environmentABSTRAK Struktur beton yang diperkuat dengan tulangan baja membentuk sebuah bagian yang penting dalam infrastruktur saat ini. Kombinasi sifat kuat tekan yang tinggi pada beton dan kuat tarik pada tulangan baja memberikan sebuah bahan komposit ideal yang menawarkan aplikasi yang lebih luas cakupannya dibandingkan dengan bahan-bahan lain pada bidang teknologi struktur sipil. Gedung-gedung, jembatan, tiang-tiang, tangki dan pipa, dapat dibuat dari bahan beton bertulang. Tujuan penelitian ini adalah untuk mengetahui durabilitas elemen struktur balok beton bertulang yang berada di lingkungan yang merusak. Penelitian ini dilaksanakan mengacu pada standar ASTM G-109 dan Florida Test of Method FM 5-522. Metode yang digunakan pada penelitian ini adalah DC Electrochemical Method dengan teknik arus paksa (impressed current). Pengujian dilaksanakan selama 120 hari, dengan data yang diambil adalah kuat lentur balok. Berdasarkan hasil penelitian tersebut dapat disimpulkan bahwa: (1) Terdapat dua pengkondisian uji terhadap balok beton bertulang, yakni (a) balok beton dikondisikan terhadap beda kuat desak, dan (b) balok beton dikondisikan dengan beda kadar garam air rendaman, (2) Dari kedua kondisi yang diberikan, perlakuan kondisi (a) maupun kondisi (b) tidak memberikan pengaruh terhadap kuat lentur balok beton, (3) Balok beton masih memberikan nilai kuat lentur yang meningkat sejalan dengan berjalannya waktu dan dengan kenaikan kuat desaknya, (4) Tidak terpengaruhnya balok beton pada kedua kondisi yang diberikan diduga disebabkan karena proses pengkondisian yang tidak terjadi dengan sempurna, sehingga proses yang diharapkan terjadi tidak berjalan sebagaimana mestinya, (5) Proses korosi paksa tidak dapat berjalan dengan baik karena larutan penghantar tidak dapat masuk/merambat ke dalam beton, (6) Parameter kuat lentur yang diperoleh belum mencerminkan kondisi struktur beton yang berada di lingkungan yang merusak.Kata kunci: balok beton, durabilitas, lingkungan yang merusak
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