|Table of Contents|

[1] Zhao Li, Guo Xinli, Ge Chuang, et al. Preparation and activity research of ecological nano mineraladmixture from rice husk charcoal [J]. Journal of Southeast University (English Edition), 2016, 32 (3): 368-372. [doi:10.3969/j.issn.1003-7985.2016.03.018]
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Preparation and activity research of ecological nano mineraladmixture from rice husk charcoal()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
32
Issue:
2016 3
Page:
368-372
Research Field:
Materials Sciences and Engineering
Publishing date:
2016-09-20

Info

Title:
Preparation and activity research of ecological nano mineraladmixture from rice husk charcoal
Author(s):
Zhao Li1;  2;  Guo Xinli1;  2;  Ge Chuang1;  2;  Guo Liping1;  3;  Shu Xin4;  Liu Jiaping1;  3;  4
1School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China
3 Jiangsu Key Laboratory of Civil Engineering Materials, Southeast University, Nanjing 211189, China
4 Jiangsu Subote New Material Co., Ltd., Nanjing 211103, China
Keywords:
ecological nano mineral admixture;  rice husk charcoal(RHC);  rice husk ash(RHA);  SiO2 nanoparticles;  pozzolanic activity
PACS:
TU526
DOI:
10.3969/j.issn.1003-7985.2016.03.018
Abstract:
The rice husk ash(RHA)and silica(SiO2)nanoparticles are prepared from rice husk charcoal(RHC)by the methods of ventilated calcining and chemical precipitation, respectively, to remove the residual carbon which is harmful to cement composites. The structures and morphologies of these products are investigated by the Fourier transform infrared spectroscopy, X-ray diffraction, scanning/transmission electron microscopy and N2 adsorption-desorption analyzer. The results show that the as-produced RHA and SiO2 nanoparticles exist in amorphous phase without residual carbon, and exhibit porous structures with specific surface areas of 170.19 and 248.67 m2/g, respectively. The micro particles of RHA are aggregated by numerous loosely packed SiO2 gel particles with the diameter of 50 to 100 nm. The SiO2 nanoparticles are well dispersed with the average size of about 30 nm. Both the RHA and SiO2 nanoparticles can significantly reduce the conductivity of saturated Ca(OH)2 solution and increase the early strength of the cement composites. They also exhibit high pozzolanic activity, indicating that they can be used as ecological nano mineral admixtures.

References:

[1] Nazari A, Riahi S. Abrasion resistance of concrete containing SiO2 and Al2O3 nanoparticles in different curing media [J]. Energy and Buildings, 2011, 43(10): 2939-2946. DOI:10.1016/j.enbuild.2011.07.022.
[2] Khoshakhlagh A, Nazari A, Khalaj G. Effects of Fe2O3 nanoparticles on water permeability and strength assessments of high strength self-compacting concrete [J]. Journal of Materials Science and Technology, 2012, 28(1): 73-82. DOI:10.1016/S1005-0302(12)60026-7.
[3] Nazari A, Riahi S. Prediction split tensile strength and water permeability of high strength concrete containing TiO2 nanoparticles by artificial neural network and genetic programming [J]. Composites: Part B, 2011, 42(3): 473-488. DOI:10.1016/j.compositesb.2010.12.004.
[4] Pacheco-Torgal F, Miraldo S, Ding Y, et al. Targeting HPC with the help of nanoparticles: An overview [J]. Construction and Building Materials, 2013, 38: 365-370. DOI:10.1016/j.conbuildmat.2012.08.013.
[5] Yu R, Spiesz P, Brouwers H J H. Effect of nano-silica on the hydration and microstructure development of ultra-high performance concrete(UHPC)with a low binder amount [J]. Construction and Building Materials, 2014, 65: 140-150. DOI:10.1016/j.conbuildmat.2014.04.063.
[6] Fang Fang, Zhou Jianbin, Yang Jiliang. Poly-generation of activated carbon and silica from rice husk charcoal [J]. Transaction of the Chinese Society of Agricultural Engineering, 2012, 28(23): 184-191.(in Chinese)
[7] Jauberthie R, Rendell F, Tamba S. et al. Origin of the pozzolanic effect of rice husks [J]. Construction and Building Materials, 2000, 14(8): 419-423. DOI:10.1016/s0950-0618(00)00045-3.
[8] Khan R, Jabbar A, Ahmad I, et al. Reduction in environmental problems using rice-husk ash in concrete [J]. Construction and Building Materials, 2012, 30: 360-365. DOI:10.1016/j.conbuildmat.2011.11.028.
[9] Liou T H. Preparation and characterization of nano-structure silica from rice husk [J]. Materials Science & Engineering A, 2004, 364(1): 313-323. DOI:10.1016/j.msea.2003.08.045.
[10] Ouyang Dong, Chen Kai. SEM/TEM study on the microstructure of rice husk ash and nano-SiO2 in it [J]. Journal of Chinese Electron Microscopy Society, 2003, 22(5): 390-394.(in Chinese)
[11] Zheng Dianmo, Zhang Xiaojie, Liu Xiaomei. New technology for preparation of nano-sized silica from rice husk [J]. Inorganic Chemicals Industry, 2010, 42(12): 52-54.(in Chinese)
[12] Luxan M P, Madruga M, Saavedra J. Rapid evaluation of pozzolanic activity of natural products by conductivity measurement [J]. Cement and Concrete Research, 1989, 19(1): 63-68. DOI:10.1016/0008-8846(89)90066-5.
[13] Jamil M, Kaish A B M A, Raman S N, et al. Pozzolanic contribution of rice husk ash in cementitious system [J]. Construction and Building Materials, 2013, 47: 588-593. DOI:10.1016/j.conbuildmat.2013.05.088.

Memo

Memo:
Biographies: Zhao Li(1987—), female, graduate; Guo Xinli(corresponding author), male, doctor, professor, guo.xinli@seu.edu.cn.
Foundation items: The Key Program of the National Natural Science Foundation of China(No.51438003), the National Basic Research Program of China(973 Program)(No.2015CB655105).
Citation: Zhao Li, Guo Xinli, Ge Chuang, et al. Preparation and activity research of ecological nano mineral admixture from rice husk charcoal[J].Journal of Southeast University(English Edition), 2016, 32(3):368-372.DOI:10.3969/j.issn.1003-7985.2016.03.018.
Last Update: 2016-09-20