Nanoscratch on mechanical properties of interfacial transition zones (ITZs) in fly ash-based geopolymer composites

被引：42

作者：

Li, Wengui ^{[1
]}

Luo, Zhiyu ^{[1
]}

Gan, Yixiang ^{[2
]}

Wang, Kejin ^{[3
]}

Shah, Surendra P. ^{[4
]}

机构：

[1] Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

[2] Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia

[3] Iowa State Univ, Dept Civil Construct & Environm Engn, Ames, IA 50011 USA

[4] Univ Texas Arlington, Ctr Adv Construct Mat, Arlington, TX 76019 USA

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2021年 / 214卷

基金：

澳大利亚研究理事会;

关键词：

Geopolymer; Interfacial transition zone (ITZ); Nanoscratch; Deconvolution analysis; Friction coefficient; RECYCLED AGGREGATE CONCRETE; CEMENT PASTE; THIN-FILM; NANOINDENTATION; INTERPHASE; PROGRESS;

D O I：

10.1016/j.compscitech.2021.109001

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Interfacial transition zones (ITZs) of cementitious concrete are highly heterogeneous, which cause many challenges in accurately obtaining their properties. In this paper, regular aggregates were applied to prepare modelled geopolymer composites, in which ITZs exhibited neat boundaries. Nanoscratch technique with the ability to quickly scan a long distance was adopted to investigate mechanical properties of ITZ and geopolymer paste. To compare the properties of the ITZs and paste, abundant scratch data were analyzed in the form of histograms and Gaussian mixture models. The results showed that the ITZs in geopolymer with silica modulus of 1.5 presented similar properties with the paste, while the ITZs in geopolymer with silica modulus of 1.0 showed significantly higher scratch hardness but lower scratch friction coefficient than paste. Deconvolution analysis revealed that the abnormal hardness and friction coefficient of the paste in geopolymer with silica modulus of 1.0 could be caused by the defects related points. Compared with the traditional scratch scheme, the parallel scratch scheme based on modelled ITZ gave more stable results with a given number of test data, which can provide indepth information for comparative studies.

引用

页数：12

共 44 条

[1] Friction and fracture characteristics of engineered crumb-rubber concrete at microscopic lengthscale [J].

Akono, Ange-Therese ;

Chen, Jiaxin ;

Kaewunruen, Sakdirat .

CONSTRUCTION AND BUILDING MATERIALS, 2018, 175 :735-745

[2] Experimental determination of the fracture toughness via microscratch tests: Application to polymers, ceramics, and metals [J].

Akono, Ange-Therese ;

Randall, Nicholas X. ;

Ulm, Franz-Josef .

JOURNAL OF MATERIALS RESEARCH, 2012, 27 (02) :485-493

[3] Nanoindentation and SEM/EDX characterization of the geopolymer-to-steel interfacial transition zone for a reactive porcelain enamel coating [J].

Allison, P. G. ;

Weiss, C. A., Jr. ;

Moser, R. D. ;

Diaz, A. J. ;

Rivera, O. G. ;

Holton, S. S. .

COMPOSITES PART B-ENGINEERING, 2015, 78 :131-137

[4] Review of recent progress in nanoscratch testing [J].

Beake, B. D. ;

Harris, A. J. ;

Liskiewicz, T. W. .

TRIBOLOGY-MATERIALS SURFACES & INTERFACES, 2013, 7 (02) :87-96

[5] A Coupled Nanoindentation/SEM-EDS Study on Low Water/Cement Ratio Portland Cement Paste: Evidence for C-S-H/Ca(OH)2 Nanocomposites [J].

Chen, Jeffrey J. ;

Sorelli, Luca ;

Vandamme, Matthieu ;

Ulm, Franz-Josef ;

Chanvillard, Gilles .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (05) :1484-1493

[6] Fundamental aspects and recent progress on wear/scratch damage in polymer nanocomposites [J].

Dasari, Aravind ;

Yu, Zhong-Zhen ;

Mai, Yiu-Wing .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2009, 63 (02) :31-80

[7] Considerations in image analysis as applied to investigations of the ITZ in concrete [J].

Diamond, S .

CEMENT & CONCRETE COMPOSITES, 2001, 23 (2-3) :171-178

[8] Surface abrasion resistance of high-volume fly ash concrete modified by graphene oxide: Macro- and micro-perspectives [J].

Du, Sen ;

Jiang, Yan ;

Zhong, Jing ;

Ge, Yong ;

Shi, Xianming .

CONSTRUCTION AND BUILDING MATERIALS, 2020, 237

[9] A review of recent research on nanoindentation of polymer composites and their constituents [J].

Gibson, Ronald F. .

COMPOSITES SCIENCE AND TECHNOLOGY, 2014, 105 :51-65

[10] Experimental chemo-mechanics of early-age fracture properties of cement paste [J].

Hoover, Christian G. ;

Ulm, Franz-Josef .

CEMENT AND CONCRETE RESEARCH, 2015, 75 :42-52

← 1 2 3 4 5 →