The Contribution of Elastic Wave NDT to the Characterization of Modern Cementitious Media

被引：32

作者：

Lefever, Gerlinde ^{[1
]}

Snoeck, Didier ^{[1
,2
]}

De Belie, Nele ^{[2
]}

Van Vlierberghe, Sandra ^{[3
]}

Van Hemelrijck, Danny ^{[1
]}

Aggelis, Dimitrios G. ^{[1
]}

机构：

[1] Vrije Univ Brussel VUB, Dept Mech Mat & Construct, Pl Laan 2, B-1050 Brussels, Belgium

[2] Univ Ghent, Fac Engn & Architecture, Dept Struct Engn & Bldg Mat, Magnel Vandepitte Lab Struct Engn & Bldg Mat, Tech Lane Ghent Sci Pk,Technol Pk,Zwijnaarde 60, B-9052 Ghent, Belgium

[3] Univ Ghent, Polymer Chem & Biomat Res Grp, Ctr Macromol Chem, Krijgslaan 281 S4-Bis, B-9000 Ghent, Belgium

来源：

SENSORS | 2020年 / 20卷 / 10期

关键词：

acoustic emission; ultrasound; hydrogel; nanosilica; SUPERABSORBENT POLYMERS SAP; AUTOGENOUS SHRINKAGE; CONCRETE; WATER; PROPAGATION; DISPERSION; HYDRATION; IMPACT;

D O I：

10.3390/s20102959

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

To mitigate autogenous shrinkage in cementitious materials and simultaneously preserve the material's mechanical performance, superabsorbent polymers and nanosilica are included in the mixture design. The use of the specific additives influences both the hydration process and the hardened microstructure, while autogenous healing of cracks can be stimulated. These three stages are monitored by means of non-destructive testing, showing the sensitivity of elastic waves to the occurring phenomena. Whereas the action of the superabsorbent polymers was evidenced by acoustic emission, the use of ultrasound revealed the differences in the developed microstructure and the self-healing of cracks by a comparison with more commonly performed mechanical tests. The ability of NDT to determine these various features renders it a promising measuring method for future characterization of innovative cementitious materials.

引用

页数：17

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