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All Journal Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan
Azwanda Azwanda
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Analisis Kapasitas Lentur Balok Beton Bertulang Dengan Campuran Pasir Besi Azwanda Azwanda; Chaira Chaira
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 5, No 1 (2020): March
Publisher : Litbang Pemas - Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v5i1.405

Abstract

The use of concrete for structures in the field of civil engineering in particular, is currently increasing so as to demand better concrete technology. The purpose of this study was to analyze the flexural capacity of reinforced concrete beams with alternative materials using iron sand as a substitute for fine aggregate. In this study reinforced concrete beams with subtle aggregate substitution will be compared with normal reinforced concrete beams. The experimental method used to obtain data is carried out through flexural capacity testing. The results showed that the two beams failed to bend as planned. Normal flexural beam capacity is 10,480 tons with a maximum deflection of 7,530 mm. Whereas for flexible beams with fine aggregate substitution of iron sand obtained a deflection size of 18,470 mm with a maximum load of 11,860 tons. The crack pattern on the iron sand aggregate substitution beam has a higher amount where the crack appears slowly and has a shorter size compared to normal concrete blocks. Reinforced concrete beams with fine aggregate substitution of iron sand can also slow the initial cracking in normal reinforced concrete beams.
Substitusi Cpo Terhadap Asphalt Pen 60/70 Pada Campuran Asphalt Concrete Wearing Course (Ac-Wc) Meidia Refiyanni; Azwanda Azwanda
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 5, No 1 (2020): March
Publisher : Litbang Pemas - Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v5i1.406

Abstract

Asphalt 60/70 pen is a non-renewable natural resource so it is necessary to carry out continuous research in an effort to reduce the use of asphalt pen 60/70 which functions as a binder in the Asphalt Cement Wearing Course (AC-WC) mixture. This is due to the high demand for road construction to improve the economy. Crude Palm Oil (CPO) is a material which has almost the same properties with asphalt pen 60/70. Based on this background, the purpose of this study is to reduce the use of asphalt in the AC-WC mixture. This research method refers to the Department of Public Works, 2010 Specifications with gradations in meetings. This research was conducted with 2 variations, namely variation 1 (75% CPO: 25% Pen 60/70) KAO value 5.5% and variation 2 (25% CPO: 75% pen 60/70) KAO value 6%. The results of the study that fulfilled all Marshall parameters in the 30 minutes immersion test were variation 2: stability values of 803.38 kg, Flow 3.13 mm, VIM 4.17%, VMA 15.80%, VFB 73.59%, MQ 256,71 kg / mm. Meanwhile the stability value in the 24-hour immersion does not meet the requirements for both variations so that the impact on the value of durability does not meet the requirements of ≥ 90%. The durability value for variation 1 is 66% and variation 2 is 69%, this shows that the mixture of AC-WC with CPO substitution is not durable.
Co-Authors Chaira Chaira Meidia Refiyanni