Effects of nano-SiO(2) and different ash particle sizes on sludge ash-cement mortar |
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| Authors: | Lin K L Chang W C Lin D F Luo H L Tsai M C |
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| Institution: | aDepartment of Environmental Engineering, National Ilan University, 1, Section 1, Shen Lung Road, I-Lan 26041, Taiwan, ROC;bDepartment of Civil Engineering, Kao Yuan University, No.1821,Chung Shan Road, Lu Chu Hsiang, Kaohsiung County 821, Taiwan, ROC;cDepartment of Civil and Ecological Engineering, I-Shou University, 1, Section 1, Hsueh-Cheng Road, Ta-Hsu Hsiang , Kaohsiung County 84008, Taiwan, ROC |
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| Abstract: | The effects of nano-SiO2 on three ash particle sizes in mortar were studied by replacing a portion of the cement with incinerated sewage sludge ash. Results indicate that the amount of water needed at standard consistency increased as more nano-SiO2 was added. Moreover, a reduction in setting time became noticeable for smaller ash particle sizes. The compressive strength of the ash–cement mortar increased as more nano-SiO2 was added. Additionally, with 2% nano-SiO2 added and a cure length of 7 days, the compressive strength of the ash–cement mortar with 1 μm ash particle size was about 1.5 times better that of 75 μm particle size. Further, nano-SiO2 functioned to fill pores for ash–cement mortar with different ash particle sizes. However, the effects of this pore-filling varied with ash particle size. Higher amounts of nano-SiO2 better influenced the ash–cement mortar with larger ash particle sizes. |
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| Keywords: | Nano-SiO2 Sewage sludge ash Mortar |
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