Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material
The effects of nano-TiO2 (NT) on microstructures and mechanical properties of cement mortars were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), and mercury intrusion porosimetry (MIP). Results show that 3% NT can remarkably increase the tensile/flexural strengths (i.e., the...
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Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2015/583106 |
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doaj-d473e047931640109b9b33c6faaf2d522020-11-25T00:19:21ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/583106583106Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based MaterialBaoguo Ma0Hainan Li1Junpeng Mei2Xiangguo Li3Fangjie Chen4State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaThe effects of nano-TiO2 (NT) on microstructures and mechanical properties of cement mortars were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), and mercury intrusion porosimetry (MIP). Results show that 3% NT can remarkably increase the tensile/flexural strengths (i.e., the toughness is improved) and promote the precipitation of AFt crystal. The flexural and tensile strengths have significant positive correlation to the formation amount of AFt. The pores of mortars can be significantly refined and shift to harmless pores by controlling the growth of CH crystal and increasing the hydration reaction rate. The durability of cement-based materials is discussed by testing their water absorption and water-vapour permeability. Results show that the addition of 3% NT can decrease the water absorption ratio by 40–65%, water absorption coefficients by more than 40%, and water-vapour permeability coefficients by 43.9%, indicating that 3% NT can effectively improve the compactness and durability of cement-based materials.http://dx.doi.org/10.1155/2015/583106 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Baoguo Ma Hainan Li Junpeng Mei Xiangguo Li Fangjie Chen |
spellingShingle |
Baoguo Ma Hainan Li Junpeng Mei Xiangguo Li Fangjie Chen Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material Advances in Materials Science and Engineering |
author_facet |
Baoguo Ma Hainan Li Junpeng Mei Xiangguo Li Fangjie Chen |
author_sort |
Baoguo Ma |
title |
Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material |
title_short |
Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material |
title_full |
Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material |
title_fullStr |
Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material |
title_full_unstemmed |
Effects of Nano-TiO2 on the Toughness and Durability of Cement-Based Material |
title_sort |
effects of nano-tio2 on the toughness and durability of cement-based material |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2015-01-01 |
description |
The effects of nano-TiO2 (NT) on microstructures and mechanical properties of cement mortars were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), and mercury intrusion porosimetry (MIP). Results show that 3% NT can remarkably increase the tensile/flexural strengths (i.e., the toughness is improved) and promote the precipitation of AFt crystal. The flexural and tensile strengths have significant positive correlation to the formation amount of AFt. The pores of mortars can be significantly refined and shift to harmless pores by controlling the growth of CH crystal and increasing the hydration reaction rate. The durability of cement-based materials is discussed by testing their water absorption and water-vapour permeability. Results show that the addition of 3% NT can decrease the water absorption ratio by 40–65%, water absorption coefficients by more than 40%, and water-vapour permeability coefficients by 43.9%, indicating that 3% NT can effectively improve the compactness and durability of cement-based materials. |
url |
http://dx.doi.org/10.1155/2015/583106 |
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