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Table 9 Autogenous shrinkage strain and total shrinkage strain of cement mortar with different CNTs dosage (W/C = 0.30).

From: Autogenous Shrinkage and Crack Resistance of Carbon Nanotubes Reinforced Cement-Based Materials

CNTs content/wt%

Autogenous shrinkage strain \(\upvarepsilon_{1}\)

Total shrinkage strain ε

\({\raise0.7ex\hbox{${\upvarepsilon_{1} }$} \!\mathord{\left/ {\vphantom {{\upvarepsilon_{1} }\upvarepsilon}}\right.\kern-0pt} \!\lower0.7ex\hbox{$\upvarepsilon$}} \times 100\%\)

0.00

− 106

− 150

70.7

0.05

− 94

− 110

85.5

0.10

− 92

− 115

80.0

0.15

− 84

− 107

78.5

  1. The strain measurement time in the table is the cracking time of specimen under semi-closed environment, the same as below.