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SULFATES EFFECT IN FINE AGGREGATE ON SELF COMPACTING CONCRETE PROPERTIES BY USING RISE HUSK ASH | ||
| Al-Qadisiyah Journal for Engineering Sciences | ||
| Article 1, Volume 8, Issue 4, 2015, Pages 526-539 PDF (0 K) | ||
| Authors | ||
| Haider K. Ammash; Haider Mohammed Majeed; Nabeel Hasen Ali Al-Salim | ||
| Abstract | ||
| One of the important problems in fine aggregate is the contaminated with interior sulfates in manufacturing concrete in Iraq. Within standard specifications a difficult to obtain of well-graded fine aggregate with sulfates content is existed. The present research is devoted to enhancement of some properties of self-compacting concrete with fine aggregate contains internal sulfates by partial replacement of gypsum to fine aggregate by weight. This study is bifurcate of selfcompacting concrete they are: first category is incorporating powder of limestone (LSP) in selfcompacting concrete and the second one is incorporating 10% rise husk ash (RHA) plus powder of limestone (LSP). The investigated scales of fine aggregate with sulfates contents were ( 0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement equal of (3.74%, 3.99%, 4.96% and 5.93%) for mixes contained limestone powder and of (3.76%, 4.01%,4.98% and 5.96%) for mixes contains rise husk ash plus powder of limestone. Experimental program of this study is bifurcate; first one is using superplasticizers and fillers to produce self-compacting concrete then determine the workability. Second one is to evaluate the mechanical properties such as splitting tensile strength and compressive strength. It was noticed that, the exemplary content of gypsum was by weight of cement for all mixes was 0.5%. While increase in compressive strength in a range between 5.9% and 10.1%, and in tensile strength in a range between 1.2% and 8.5% for mixes of self-compacting concrete with limestone powder plus rise husk ash instead of limestone powder. | ||
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