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Influence of fly ash fineness on water requirement and shrinkage of blended cement mortars |
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| รหัสดีโอไอ | |
| Creator | 1. Vanissorn Vimonsatit 2. Prinya Chindaprasirt 3. Seksun Ruangsiriyakul 4. Vanchai Sata |
| Title | Influence of fly ash fineness on water requirement and shrinkage of blended cement mortars |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2558 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 42 |
| Journal No. | 4 |
| Page no. | 311-316 |
| Keyword | Fineness,Fly ash,Drying shrinkage,Autogenous shrinkage,Mortar |
| ISSN | 0125-8273 |
| Abstract | In this paper, the influence of fly ash fineness on water requirement and shrinkage of blended cement mortar was studied. The results indicate that the water requirement and shrinkage characteristic of the blended cement mortar are dependent on fly ash fineness and replacement level. The use of coarse fly ash slightly reduces the water requirement but greatly reduced the drying and the autogenous shrinkage of the blended cement mortars and the reduction is more with an increase in the fly ash replacement level. The finer fly ashes further reduce the water requirement, but increase the drying and the autogenous shrinkages as compared with coarser fly ash. The incorporation of superplasticizer drastically reduces the water requirement, but the effect on the drying and autogenous shrinkages of the normal Portland cement mortar is small. However, for the fly ash mortar, the use of superplasticizer results in a decrease in drying shrinkage and in a substantial increase in the autogenous shrinkage particularly for the fine fly ash at a high replacement level. |
