The material from Lampung as coarse aggregate to substitute andesite for concrete-making

Mineral Processing and Technology International Conference 2017

Amin, M.^1 ; Supriyatna, Y.I.^1 ; Sumardi, S.^1

Research Unit for Mineral Technology, Indonesian Institute of Sciences (LIPI), South Lampung, Indonesia^1

关键词: Aggregate size;    Coarse aggregates;    Concrete-making;    Iron processing;    Laboratory experiments;    Material compositions;    Natural materials;    Research activities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/285/1/012016/pdf
DOI  :  10.1088/1757-899X/285/1/012016

来源: IOP

【 摘 要 】

Andesite stone is usually used for split stone material in the concrete making. However, its availability is decreasing. Lampung province has natural resources that can be used for coarse aggregate materials to substitute andesite stone. These natural materials include limestone, feldspar stone, basalt, granite, and slags from iron processing waste. Therefore, a research on optimizing natural materials in Lampung to substitute andesite stone for concrete making is required. This research used laboratory experiment method. The research activities included making cubical object samples of 150 x 150 x 150 mm with material composition referring to a standard of K.200 and w/c 0.61. Concrete making by using varying types of aggregates (basalt, limestone, slag) and aggregate sizes (A = 5-15 mm, B = 15-25 mm, and 25-50 mm) was followed by compressive strength test. The results showed that the obtained optimal compressive strengths for basalt were 24.47 MPa for 50-150 mm aggregate sizes, 21.2 MPa for 15-25 mm aggregate sizes, and 20.7 MPa for 25-50 mm aggregate sizes. These results of basalt compressive strength values were higher than the same result for andesite (19.69 MPa for 50-150 mm aggregate sizes), slag (22.72 MPa for 50-150 mm aggregate sizes), and limestone (19.69 Mpa for 50-150 mm aggregate sizes). These results indicated that basalt, limestone, and slag aggregates were good enough to substitute andesite as materials for concrete making. Therefore, natural resources in Lampung can be optimized as construction materials in concrete making.