Effect of Calcium Carbonate Whisker on Impact Toughness of Precast Concrete

Linnü Lü; Yisa Wang; Yongjia He; Fazhou Wang; Shuguang Hu

doi:10.1007/s11595-021-2419-5

Journal of Wuhan University of Technology Materials Science Edition ›› 2021, Vol. 36 ›› Issue (3) : 374 -380. DOI: 10.1007/s11595-021-2419-5

Cementitious Materials

Effect of Calcium Carbonate Whisker on Impact Toughness of Precast Concrete

Linnü Lü ¹^,²
, Yisa Wang ¹^,²
, Yongjia He ²^,³^,^{^c}
, Fazhou Wang ²^,³
, Shuguang Hu ²^,³

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Abstract

The impact toughness and compressive strength of concrete added with calcium carbonate whisker are studied. It is found that calcium carbonate whisker can significantly improve the impact energy consumption at failure of 55 °C steam cured concrete, but has limited impact on 90 °C steam cured concrete. At the same time, SEM, XRD and LF-NMR were used to study the micro morphology, hydration product components and pore structure of the concrete, and the mechanism of the influence of calcium carbonate whisker on the impact toughness and compressive strength of concrete was analyzed.

Keywords

calcium carbonate whisker / concrete products / impact toughness / compressive strength

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Linnü Lü,Yisa Wang,Yongjia He,Fazhou Wang,Shuguang Hu. Effect of Calcium Carbonate Whisker on Impact Toughness of Precast Concrete. Journal of Wuhan University of Technology Materials Science Edition, 2021, 36(3): 374-380 DOI:10.1007/s11595-021-2419-5