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EFFECT OF GRADING AND TYPES OF COARSE AGGREGATES ON THE COMPRESSIVE STRENGTH AND UNIT WEIGHT OF CONCRETE | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 6, 2011, Pages 74-87 | ||
| Author | ||
| Nadwa Sadi Hassan | ||
| Abstract | ||
| Nine concrete mixes were prepared using natural river sand and uncrushed river gravel, with respect to the 7 and 28-day compressive strength results, it was found that the optimum combined grading group was Coarse Gravel + Fine Sand (CG+FS). Using the (CG+FS) grading group, results indicated that, concrete mixes prepared with natural river sand and uncrushed river gravel give the highest compressive strength among the four concrete mixes made of natural river sand with crushed limestone, crushed ceramic, and crushed glass waste as coarse aggregates respectively.On the other hand, concrete mixes prepared with natural river sand and crushed limestone waste give lower fresh, wet, and dry unit weight than those mixes prepared with natural river sand and crushed ceramic, crushed glass, and uncrushed gravel waste as coarse aggregate respectively. | ||
| Keywords | ||
| Optimum Combined Grading; compressive strength; Unit Weight of concrete | ||
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