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@article{TEKNIK4385, author = {Purwanto Purwanto and Yulita Arni Priastiwi}, title = {PENGARUH KADAR LUMPUR PADA AGREGAT HALUS DALAM MUTU BETON}, journal = {TEKNIK}, volume = {33}, number = {2}, year = {2012}, keywords = {compressive strength, clay lamps, aggregate}, abstract = {Clay lumps on the aggregate levels is one of the factors that may cause disruption of the binding process and hardening of concrete. Clay lump can not blend with cement so that blocking a merger between the cement with aggregates which eventually led to the compressive strength of concrete will be reduced in the absence of binding to each other. SK SNI S-04-1989-F, the allowable levels of clay lump maximum of 5% to fine aggregate (sand) and maximum of 1% for coarse aggregate (split). In this study to determine the effect of the clay lump on the fine aggregate content on compressive strength of concrete on five (5) variations levels of the category of clean clay lump with content of 1% and 2%, medium clay lump 4% and dirty sand with levels 7 % and 11%, whereas for the coarse aggregate clay lump content was 0.7%. From the results of a study of 90 cylindrical specimens showed that the small amount of clay lump, the higher the compressive strength of concrete. Concrete compressive strength test results on average with dirty clay lump content was 31.30 MPa, compressive strength for the concrete medium with clay lump levels were at 33.92 MPa and compressive strength for the concrete clean of clay lump 36.68 MPa. Compared to the dirty clay lump an increase in the levels of average compressive strength for moderate levels of 8,37% and the clean sand of 17,19%. Besides affecting in compressive strength, clay lump levels also affect the weight of concrete, and concrete density. The greater the level of clay lump, weight of concrete and concrete density will be lower. Compared to the dirty clay lump an increase in the levels of average concrete density for moderate levels of 6,54 % and the clean sand of 12,59%.}, issn = {2460-9919}, pages = {46--51} doi = {10.14710/teknik.v33i2.4385}, url = {https://ejournal.undip.ac.id/index.php/teknik/article/view/4385} }
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