PEMANFAATAN BATU SILIKA DARI PADANGRATU LAMPUNG TENGAH PROPINSI LAMPUNG SEBAGAI AGREGAT UNTUK PEMBUATAN BATA BETON NON PASIR

Crushed stone from the river sources in the District of Central Lampung regency Padangratu, up to now has not been used optimally. The use of gravel sand mining waste results are only used for road pavement layers or for ornamental stone. Visual manifestation of this gravel has a characteristic that...

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Bibliographic Details
Main Authors: , Ferdiyanti, , Prof. Dr. Ir. Iman Satyarno, ME
Format: Thesis
Published: [Yogyakarta] : Universitas Gadjah Mada 2012
Subjects:
ETD
Description
Summary:Crushed stone from the river sources in the District of Central Lampung regency Padangratu, up to now has not been used optimally. The use of gravel sand mining waste results are only used for road pavement layers or for ornamental stone. Visual manifestation of this gravel has a characteristic that is prospective for aggregate material, but have never done the research and testing to find out about the properties and strength to concrete. Through this research is expected to be a reference in the utilization of the aggregate in the manufacture of no fines concrete brick so it can be more efficient, economical and legal compliance. Apart from that expected to be a reference in respect of the nonstructural development, especially in Central Lampung regency. Scope of the study include the examination and testing of no fines gravel and concrete. Gravel grain size fraction that is used is limited to 5-10 mm grain, no fines concrete mixtures made with variations in the volume ratio of cement: aggregate of 1:4, 1:6, 1:8, 1:10 and cement water factor of 0.40 . Each variation was tested at 28 days. Cylindrical concrete specimens, diameter 150 mm, height 300 mm and 400 mm size concrete brick x 200 mm x 100 mm. Number of specimens 24 and 20 cylinders of concrete bricks, which are used to determine the effect of nature and the technical properties of concrete masonry no fines concrete. The results showed that the silica stones of Padangratu generally qualify for use as concrete aggregate. Specific gravity, unit weight, hardness and wear resistance aggregate shows characteristics of a normal aggregate. Specific gravity, air voids, the compressive strength and modulus of elasticity of concrete no fines has a specific characteristic. No fines concrete weight per m3 with a volume ratio of cement: aggregate 1:4, 1:6, 1:8, 1:10 ranged from 1.83 to 2.12kgs/m3 (concrete cylinders) and 1.82 to 2, 09 kgs/ m3 (concrete brick), no fines concrete air voids ranged from 8.64% -25.10% (concrete cylinders) and 8.08% - 26.31% (concrete blocks), no fines concrete compressive strength ranging between 6.77 MPa - 21.77 MPa (concrete cylinders) and 4.49 MPa - 11.86 (concrete brick) MPa and elasticity modulus values ranged from 8334.20 MPa - 31 671 MPa.