A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete

被引：8

作者：

Li, Zhenming ^{[1
]}

Yao, Xingliang ^{[1
,2
]}

Chen, Yun ^{[1
,3
]}

Lu, Tianshi ^{[1
]}

Ye, Guang ^{[1
,4
]}

机构：

[1] Delft Univ Technol, Fac Civil Engn & Geosci, Dept Mat Mech Management & Design, NL-2628 CN Delft, Netherlands

[2] Shandong Univ, Natl Engn Lab Coal Fired Pollutants Emiss Reduct, Jinan 250061, Peoples R China

[3] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

[4] Univ Ghent, Dept Struct Engn, Magnel Lab Concrete Res, B-9052 Ghent, Belgium

来源：

APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 17期

关键词：

alkali-activated concrete; shrinkage; cracking; internal curing; metakaolin;

D O I：

10.3390/app10176092

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materials in infrastructure. To mitigate the autogenous shrinkage of AASF, two innovative autogenous-shrinkage-mitigating admixtures, superabsorbent polymers (SAPs) and metakaolin (MK), are applied in this study. The results show that the incorporation of SAPs and MK significantly mitigates autogenous shrinkage and cracking potential of AASF paste and concrete. Moreover, the AASF concrete with SAPs and MK shows enhanced workability and tensile strength-to-compressive strength ratios. These results indicate that SAPs and MK are promising admixtures to make AASF concrete a high-performance alternative to Portland cement concrete in structural engineering.

引用

页数：13

共 36 条

[11] Effect of elevated temperature curing on properties of alkali-activated slag concrete [J].

Bakharev, T ;

Sanjayan, JG ;

Cheng, YB .

CEMENT AND CONCRETE RESEARCH, 1999, 29 (10) :1619-1625

[12]

Bilek Jr Vlastimil, 2018, Key Engineering Materials, V761, P19, DOI 10.4028/www.scientific.net/KEM.761.19

[13] Shrinkage Characteristics of Alkali-Activated Slag Cements [J].

Cartwright, Christopher ;

Rajabipour, Farshad ;

Radlinska, Aleksandra .

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2015, 27 (07)

[14] Effect of autogenous deformation on the cracking risk of slag cement concretes [J].

Darquennes, Aveline ;

Staquet, Stephanie ;

Delplancke-Ogletree, Marie-Paule ;

Espion, Bernard .

CEMENT & CONCRETE COMPOSITES, 2011, 33 (03) :368-379

[15] The role of inorganic polymer technology in the development of 'green concrete' [J].

Duxson, Peter ;

Provis, John L. ;

Lukey, Grant C. ;

Van Deventer, Jannie S. J. .

CEMENT AND CONCRETE RESEARCH, 2007, 37 (12) :1590-1597

[16]

Ereno Abdalkader A.H.M, 2006, P 10 E AS PAC C STRU, P473, DOI [10.14359/1951, DOI 10.14359/1951]

[17] Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature [J].

Fang, Guohao ;

Ho, Wing Kei ;

Tu, Wenlin ;

Zhang, Mingzhong .

CONSTRUCTION AND BUILDING MATERIALS, 2018, 172 :476-487

[18] Assessing residual stress development and stress relaxation in restrained concrete ring specimens [J].

Hossain, AB ;

Weiss, J .

CEMENT & CONCRETE COMPOSITES, 2004, 26 (05) :531-540

[19]

Li Z., 2020, CONSTR BUILD MAT

[20]

Li Z., 2020, MAT STRUCT

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