Mortar containing fly ash and rubber sawdust ash
2000
Tonnayopas, D. | Chaosincharoen, J. (Prince of Songkla Univ., Songkhla (Thailand). Faculty of Engineering. Dept. of Mining and Materials Engineering)
Mortar containing fly ash and rubber sawdust ash were proportioned in percentages of 20 and 40 by weight of cement. Specimens were divided into 3 curing periods at 7, 14 and 28 days. Experimental investigation of physio-mechanical properties consisted of absorption, specific gravity, compressive strength, flexural strength, and acidic resistance using sulfuric acid. Test results indicated that fly ash could be used for partial replacement of cement materials, especially in proportion of 40 percent at 28 days curing. The average water absorption was 5.83 percent, average specific gravity 2.05, average compressive strength 297.25 ksc, and average flexural strength 26.18 ksc. Sulfuric acid resistance of these mortars cured for 14 days indicated about 98.24 percent. On the other hand, rubber sawdust ash mortar gave lower values than ones of fly ash mortar in all conditions. The average water absorption was 1.82 percent and average specific gravity 1.82. Their average compressive strength was 63.28 ksc, average flexural strength 12.93 ksc and sulfuric acid resistance 95.26 percent. Use of fly ash represents a significant development in concrete technology, especially in concrete structure, while rubber sawdust ash is appropriate for light weight aggregate which surface is not exposed to chemical conditions.
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Эту запись предоставил Kasetsart University