It is well-known that supplementary cementitious materials (SCMs) and low water-to-binder (w/b) ratio increase autogenous shrinkage, but the impact on microcracking long-term transport properties less understood. This paper examines effect of induced by shrinkage concretes cured up to ~3.6 years. Variables include SCM type (9% SF, 70% GGBS), w/b (0.20–0.45), maximum-aggregate-size (MSA: 5–20 mm...

This research investigates changes in the nanostructure and the nanoscale local mechanical properties of cement paste with microand nano-modifiers. Silica fume and multiwall carbon nanotubes (MWCNTs) were used as microand nano-modifiers. An effective method of dispersing CNTs in cement matrix was developed. A detailed study on the effects of CNTs concentration and aspect ratio on the fracture p...