Effects of nano-SiO(2) and different ash particle sizes on sludge ash-cement mortar.
The effects of nano-SiO(2) 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-SiO(2) 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-SiO(2) was added. Additionally, with 2% nano-SiO(2) added and a cure length of 7 days, the compressive strength of the ash-cement mortar with 1 microm ash particle size was about 1.5 times better that of 75microm particle size. Further, nano-SiO(2) 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-SiO(2) better influenced the ash-cement mortar with larger ash particle sizes.
Lin
K L
KL
Department of Environmental Engineering, National Ilan University, 1, Section 1, Shen Lung Road, I-Lan 26041, Taiwan, ROC.
Chang
W C
WC
Lin
D F
DF
Luo
H L
HL
Tsai
M C
MC
D003252:Construction Materials; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D010316:Particle Size; D012722:Sewage; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
D012722:Sewage; D012822:Silicon Dioxide