title: Effects of nano-SiO(2) and different ash particle sizes on sludge ash-cement mortar.
abstract: 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.
authors.affiliation: Department of Environmental Engineering, National Ilan University, 1, Section 1, Shen Lung Road, I-Lan 26041, Taiwan, ROC.
authors.forename: K L
authors.initials: KL
authors.lastname: Lin
authors.forename: W C
authors.initials: WC
authors.lastname: Chang
authors.forename: D F
authors.initials: DF
authors.lastname: Lin
authors.forename: H L
authors.initials: HL
authors.lastname: Luo
authors.forename: M C
authors.initials: MC
authors.lastname: Tsai
mesh_terms: D003252:Construction Materials; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D010316:Particle Size; D012722:Sewage; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D012722:Sewage; D012822:Silicon Dioxide