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All Journal CIVED (Journal of Civil Engineering and Vocational Education) Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Herol, Herol
Universitas Andalas
Civil Engineering, Building, Construction & Architecture Engineering

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Sifat Fisik Bata Beton Dengan Penambahan Styrofoam Herol, Herol; Djauhari, Zulfikar; Ismeddyanto, Ismeddiyanto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Indonesia is a country with a high seismic activity. Due to this reason, constructions in Indonesia must pay attention to every aspect, including the design, the construction process and materials. The use of concrete bricks on the wall has an impact on the loading of a structure. This research aimed to determine the effect of addition of styrofoam to the weight, density, water absorption and porosity of the concrete bricks. In this study, the composition of the mixture used was 1 cement : 3 sand with the variations of styrofoam as a substitute for sand at 0%, 5%, 10% and 15%. Test results showed that the average weight of concrete brick with 0% of styrofoam was 2.42 gr/cm3, 5% of styrofoam was 2,31 gr/cm3, 10% of Styrofoam was 2.29 gr/cm3, and 15% of styrofoam was 2.22 gr/cm3. The porosity of the concrete brick with 0% of styrofoam was 7.89%, 5% of styrofoam was 7.66%, 10% of styrofoam was 6.81%, and 15% of styrofoam was 4.62%. From water absorption test, the results showed that the average value of concrete brick with 0% of styrofoam was 3.70%, 5% of styrofoam was 3.63%, 10% of styrofoam was 3.34%, and 15% of styrofoam was 2.32%. The more styrofoam is added, the more the weight and density of the concrete was decreasing. The porosity and water absorption values of the concrete bricks was decreasing with the addition of styrofoam due to the waterproof property of styrofoam. The result of water absorption test showed that all concrete bricks tested were concrete bricks with quality I, that are concrete brick used for load bearing construction and are commonly used for unprotected construction (outside the roof) because of having a water absorption value smaller than 25%. Keywords: Concrete brick, styrofoam, weight, density, water absorption, porosity
ANALISIS PENGARUH PERUBAHAN TATA GUNA LAHAN TERHADAP ALIRAN PERMUKAAN DAN LAJU SEDIMENTASI MENGGUNAKAN ArcSWAT Herol Herol; Nurhamidah Nurhamidah; Andriani Andriani
CIVED Vol 9, No 1 (2022): Maret 2022
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v9i1.115798

Abstract

Pertumbuhan penduduk dari waktu ke waktu semakin meningkat sehingga kebutuhan akan lahan untuk membangun semakin tinggi. Akibatnya perubahan penggunaan lahan tidak dapat dihindarkan. Penelitian ini bertujuan untuk menguji pengaruh perubahan penggunaan lahan terhadap aliran permukaan dan laju sedimentasi. DAS Batang Air Dingin bagian hulu dan tengah tahun 2011 dan 2019 menjadi kajian dalam penelitian ini. Pemodelan hidrologi dalam penelitian ini menggunakan model soil and water assessment tool (SWAT). Perubahan penggunaan lahan dari tahun 2011 hingga 2019 didominasi oleh perubahan hutan menjadi semak belukar. Pengaruh perubahan penggunaan lahan tahun 2011 dan 2019 terhadap aliran permukaan relatif kecil yaitu hanya 2%, dengan koefisien aliran permukaan (C) sebesar 0,35 dengan kriteria sedang. Nilai tersebut menunjukkan bahwa DAS Batang Air Dingin cukup baik dalam merespon air hujan sehingga hanya sebagian kecil air hujan yang menjadi limpasan permukaan. Pengaruh perubahan penggunaan lahan tahun 2011 dan 2019 terhadap laju sedimentasi cukup besar dengan nilai perubahan terbesar 300%, dan terjadi peningkatan kriteria dari ringan menjadi sedang.
Co-Authors Andriani Andriani Ismeddyanto, Ismeddiyanto Nurhamidah, Nurhamidah Zulfikar Djauhari