Influence of Fine Aggregate Grading on Some Properties of Self – Compacting Concrete | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 14, Issue 3, September 2010, Pages 18-37 | ||
| Author | ||
| Luma Abdul Ghani Zghair | ||
| Abstract | ||
| Self compacting concrete ( SCC ) can be classified as high – performance concrete .It does not require to be vibrated to achieve full compaction. This offers many benefits and advantages over conventional concrete. The main object of this work was to investigate the properties of SCC produced by locally available materials and to evaluate the effect of grading of fine aggregate ( Coarse Grading CG , Medium Grading MG and Fine Grading FG ) with fineness modulus ranging from (1.9 to 2.7) on some properties of SCC .To achieve this aim, three different mixes of SCC were designed and tested . The used cement content was ( 350 kg/m3) , the powder content material ( cement + limestone dust) maintained constant (500 kg/m3 ) and the water/powder content ratio was ( 0.34). To determine the workability , different test methods were adopted as slump flow , J-ring and L –box tests . It is found the workability of all studied mixes is good, with slump flow diameter greater than or equal to (600 mm), flow times range between (3 and 7.5)sec. while the step of blocking ranges between (0 and 1)mm. The mechanical properties of hardened SCC mixes are also assessed. (compressive strength, splitting tensile strength , modulus of rupture , static modulus of elasticity, and density ) . The results of this study show the possibility of using different grading of fine aggregate with fineness modulus ranging from ( 1.9 to 2.7 ) to produce SCC . The grading pf fine aggregate has a significant effect on fresh properties of SCC while it has insignificant effect on mechanical properties of SCC. | ||
| Keywords | ||
| SCC; Fine Aggregate Grading; limestone dust; ring; slump flow test; compressive strength; static modulus of elasticity; splitting tensile strength; modulus of rupture and density tests | ||
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