Engineered cementitious composite with characteristic of low drying shrinkage / Jun Zhang in Cement and concrete research, Vol. 39 N° 4 (Avril 2009)  

Public ISBD [article]  inCement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 303–312 Titre : Engineered cementitious composite with characteristic of low drying shrinkage Type de document : texte imprimé Auteurs : Jun Zhang, Auteur ; Chengxu Gong, Auteur ; Zili Guo, Auteur Année de publication : 2009 Article en page(s) : pp. 303–312 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Tensile properties  Shrinkage  Composite  Fiber reinforcement Résumé : This paper reports a new class of engineered cementitious composite (ECC) with characteristics of low drying shrinkage, tight crack opening and high tensile strain capacity. Research emphasis is placed on the influence of different cementitious matrix on drying shrinkage, tensile property and early age cracking behavior of the composites. Experimental results show that drying shrinkage of the composite is greatly reduced as using the low shrinkage cementitious material in matrix, while the composite remains strain-hardening and multiple cracking characteristics. The measured drying shrinkage strain at 28 days is only 109 × 10− 6 to 242 × 10− 6 for low shrinkage ECCs. For traditional ECC, the shrinkage strain at 28 days is nearly 1200 × 10− 6. The average tensile strain capacity after 28 days curing is 2.5% of the low shrinkage ECC with tensile strength of 4–5 MPa. Further, in the strain-hardening and multiple cracking stage, cracks with much smaller width compared to the traditional ECC are formed in the low shrinkage ECC. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000398 [article] Engineered cementitious composite with characteristic of low drying shrinkage [texte imprimé] / Jun Zhang, Auteur ; Chengxu Gong, Auteur ; Zili Guo, Auteur . - 2009 . - pp. 303–312. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 303–312 Mots-clés : Tensile properties  Shrinkage  Composite  Fiber reinforcement Résumé : This paper reports a new class of engineered cementitious composite (ECC) with characteristics of low drying shrinkage, tight crack opening and high tensile strain capacity. Research emphasis is placed on the influence of different cementitious matrix on drying shrinkage, tensile property and early age cracking behavior of the composites. Experimental results show that drying shrinkage of the composite is greatly reduced as using the low shrinkage cementitious material in matrix, while the composite remains strain-hardening and multiple cracking characteristics. The measured drying shrinkage strain at 28 days is only 109 × 10− 6 to 242 × 10− 6 for low shrinkage ECCs. For traditional ECC, the shrinkage strain at 28 days is nearly 1200 × 10− 6. The average tensile strain capacity after 28 days curing is 2.5% of the low shrinkage ECC with tensile strength of 4–5 MPa. Further, in the strain-hardening and multiple cracking stage, cracks with much smaller width compared to the traditional ECC are formed in the low shrinkage ECC. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000398

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