Synergistic Effect of Nano Silica and Fly Ash on the Cement-based Materials

被引：0

作者：

Zhang X. ^{[1
,2
]}

Liu M. ^{[1
,2
]}

Du X. ^{[3
]}

Yang X. ^{[1
,2
]}

Zhou Z. ^{[1
,2
]}

机构：

[1] School of Materials Science & Engineering, University of Jinan, Jinan

[2] Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, Jinan

[3] School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin

来源：

Cailiao Daobao/Materials Review | 2017年 / 31卷 / 12期

关键词：

Fly ash; Nano silica; Pozzolanic activity; Synergistic effect;

D O I：

10.11896/j.issn.1005-023X.2017.024.011

中图分类号：

学科分类号：

摘要：

The synergistic effect of nano silica and fly ash on cement based materials was studied by adjusting the ratio of nano SiO2 and fly ash. The results showed that the effect of nano silica and fly ash on cement is better than that of adding single nano silica. The early compressive strength reduction by fly ash can be compensated by adding 3% nano silica and less than 30% fly ash into mortar without the decrement of 28 days compressive strength. The drying shrinkage of mortar increased with the increase of nano SiO2, but the fly ash can relieve the drying shrinkage of nano SiO2. With the increase of nano silica, the freeze thaw resistance and chloride corrosion resistance of the specimens were improved, and 3% nanometer silica and 30%fly ash could further enhance the durability of cement-based materials. Nano SiO2 can shorten the induction period of cement hydration and accelerated the process of cement hydration, and the total heat release was increased when nano SiO2 was added. When adding nano SiO2 into the cement-fly ash system, the content of non evaporated water was increased obviously in the early stage, but the increment of the non evaporated water in the late stage was slow. The synergistic effect of nanosilica and fly ash improves the performance of cement mortar, which is beneficial to the performance complementarity. © 2017, Materials Review Magazine. All right reserved.

引用

页码：50 / 55and62

页数：5512

共 21 条

[1]

Sarkar A., Sahani A.K., Roy D.K.S., Et al., Compressive strength of sustainable concrete combining blast furnace slag and fly ash, IUP J Struct Eng, 9, 1, (2016)

[2]

Temuujin J., Ruescher C., Minjigmaa A., Et al., Characterization of effloresences of ambient and elevated temperature cured fly ash based geopolymer type concretes, Adv Mater Res, 1139, (2016)

[3]

Criado M., Sobrados I., Bastidas J.M., Et al., Corrosion behaviour of coated steel rebars in carbonated and chloride-contaminated alkali-activated fly ash mortar, Prog Org Coat, 99, (2016)

[4]

Mehdipour I., Vahdani M., Amini K., Et al., Linking stability characteristics to material performance of self-consolidating concrete-equivalent-mortar incorporating fly ash and metakaolin, Constr Build Mater, 105, (2016)

[5]

Chi M., Synthesis and characterization of mortars with circulating fluidized bed combustion fly ash and ground granulated blast-furnace slag, Constr Build Mater, 123, (2016)

[6]

Rong Z.D., Et al., Effects of nano-SiO<sub>2</sub> particles on the mechanical and microstructural properties of ultra-high performance cementitious composites, Cem Concr Compos, 56, (2015)

[7]

Fallah S., Nematzadeh M., Mechanical properties and durability of high-strength concrete containing macro-polymeric and polypropylene fibers with nano-silica and silica fume, Constr Build Mater, 132, (2017)

[8]

Chithra S., Kumar S.R.R.S., Chinnaraju K., The effect of colloidal nano-silica on workability, mechanical and durability properties of high performance concrete with copper slag as partial fine aggregate, Constr Build Mater, 113, (2016)

[9]

Shah S.P., Hou P., Konsta-Gdoutos M.S., Nano-modification of cementitious material: Toward a stronger and durable concrete, J Sustainable Cement-Based Mater, 5, 1-2, (2016)

[10]

Karoriya D., Gupta R., Performance of concrete with fly ash and kaolin inclusion, Imperial J Interdisciplinary Res, 2, 7, (2016)

← 1 2 3 →