RT Journal Article
SR Electronic
T1 Mesocrystalline calcium silicate hydrate: A bioinspired route toward elastic concrete materials
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP e1701216
DO 10.1126/sciadv.1701216
VO 3
IS 11
A1 Picker, Andreas
A1 Nicoleau, Luc
A1 Burghard, Zaklina
A1 Bill, Joachim
A1 Zlotnikov, Igor
A1 Labbez, Christophe
A1 Nonat, André
A1 Cölfen, Helmut
YR 2017
UL http://advances.sciencemag.org/content/3/11/e1701216.abstract
AB Calcium silicate hydrate (C-S-H) is the binder in concrete, the most used synthetic material in the world. The main weakness of concrete is the lack of elasticity and poor flexural strength considerably limiting its potential, making reinforcing steel constructions necessary. Although the properties of C-S-H could be significantly improved in organic hybrids, the full potential of this approach could not be reached because of the random C-S-H nanoplatelet structure. Taking inspiration from a sea urchin spine with highly ordered nanoparticles in the biomineral mesocrystal, we report a bioinspired route toward a C-S-H mesocrystal with highly aligned C-S-H nanoplatelets interspaced with a polymeric binder. A material with a bending strength similar to nacre is obtained, outperforming all C-S-H–based materials known to date. This strategy could greatly benefit future construction processes because fracture toughness and elasticity of brittle cementitious materials can be largely enhanced on the nanoscale.