PENGARUH PENGGUNAAN ABU VULKANIK MERAPI VARIASI 25% DAN 30% SEBAGAI BAHAN SUBSTITUSI SEMEN PADA BETON NON PASIR UNTUK STRUKTUR BRONJONG
| Main Authors: | , BRILLIAN SURYA RAHARJANI, , Dr. Ir. Ahmad Rifa'i, M.T. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/127291/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=67540 |
Daftar Isi:
- Mount Merapi is the most active volcanoes in the world. It's eruption at 2010 has released many materials, such as volcanic ash and bantak in a massive volume. Volcanic ash may becomes waste material if it is not being reduced, and may cause environment contaminating and illness due to heavy metals containing. The deposit of bantak in sabodam could decrease the sabodam's volume. The frequent of geothecnical problems, such as landslide and erossion are increasing now. To override those problems, geo-structures must be applied. Gabion is one of common geotechnical structure, but rocks as the filler of gabion are coming rare now. The investigation reported in this experiment is carried out to study the utilization of volcanic ash in cement concrete as a partial replacement of cement. The study observed the physical and mechanical, and environmental properties of the concrete, and obtain the optimum variation of non fines concrete mixtures that fulfill the requirements as geo-structures especially as gabion filler. The experiment conducted by subtitute 0%, 25%, and 30% of cement with volcanic ash. The study observed the density, compressive strength, flexure strength, modulus of elasticity, porosity, water permeability, interface between concrete and soil, and leaching (heavy metals concentration). The results showed that partial replacement of cement using 25% and 30% volcanic ash cause decreasing of density and compressive strength, but the flexural strength, porosity and water permeability is not significantly influenced. Pozzolanic reaction caused significant increasing of compressive strength in 56 days. The optimum mixture is no fines concrete using 30% volcanic ash. The leaching result showed that the optimum mixture meets the requirement of water quality standard type D based on KEP-02/MENKLH/I/1988.