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Resistance of Self Compacting Concrete to Internal Sulphates Attack | ||
| Journal of University of Babylon | ||
| Article 1, Volume 21, Issue 3, 2013, Pages 839-851 | ||
| Author | ||
| Jinan Jawad Hassan Alwash | ||
| Abstract | ||
| The objective of this work is to study the resistance of SCC concrete to internal sulphates attack. The self compacting concrete is made by using a local filler (pigment and metakaolin). A mix of self-compacting concrete was designed according to special specifications and trials. This mix was tested by various fresh concrete workability tests as Slump-flow, T 50cm, L.box, U.box, and V.funnel tests. Five levels of SO3 content in ( fine aggregate) sand were investigated , these levels were about [0.24% , 0.5% , 1% , 2% , and 3% ]. Which yield [3.05% , 3.47% , 4.28 % , 5.9% , and 7.52%] total SO3 content by weight of cement respectively for SCC mixes with pigment powder filler and [3.08% , 3.5% , 4.31% , 5.94% , and 7.56%] for SCC mixes with metakaolin powder . The experimental results show that there is an optimum gypsum content in sand (SO3 = 1.0%) by wt. of sand which gives the highest results in compressive strength, flexural strength and ultrasonic pulse velocity of SCC . As gypsum content increases beyond this limit the above mechanical properties will be decreased. | ||
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