Elastic Response of Cementitious Gels to Polycation Addition.

ABSTRACT: The high compressive strength of cementitious materials stems from the creation of a percolated network of calcium silicate hydrate (C-S-H) nanoparticles glued together by strong Ca²⁺-Ca²⁺ correlation forces. Although strong, the ion correlation force is short range and yields poor elastic properties (elastic limit and resilience). Here, the use of polycations to partially replace Ca²⁺ counterions and enhance the resilience of cementitious materials is reported. Adsorption isotherms, electrophoretic mobility, as well as small angle X-ray scattering and dynamic rheometry measurements, are performed on C-S-H gels, used as nonreactive models of cementitious systems, in the presence of different linear and branched polycations for various electrostatic coupling

SUBMITTER: Brunel F 

PROVIDER: S-EPMC6640977 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature