Abstract Alkali-activated slag-metakaolin (AASM) has a lower shrinkage than alkali-activated slag, but its complex behaviour remains elusive. In this paper, resistivity measurements were used to monitor the early chemical and autogenous evolution of AASM (containing 10%, 30%, 50%, or 70% metakaolin). The MK content greatly affected development AASM, specimens with 50% showed lowest 49%. presenc...

A structure-based modelling framework was established to simulate the three-dimensional autogenous shrinkage of cement paste. hydration model, HYMOSTRUC3D-E, used obtain microstructures and ionic concentrations lattice fracture model based on effective stress modulus consider elastic creep parts shrinkage. For Portland pastes with water-to-cement ratios 0.3 0.4 (where time zero set as drop in i...

This study assessed the radiographic appearance of bone graft domes longitudinally after osteotome sinus floor elevation using cone beam computed tomography (CBCT). This study presents the radiological findings of a 6-month follow-up CBCT study in maxillary osteotome sinus floor elevation. We examined 52 patients with a crestal bone height of less than 8 mm in the posterior maxilla who required...

Concretes are designed to fulfill specific engineering requirements, commonly exemplified by slump, unit weight, and compressive strength. One source of untapped potential for varying engineering properties of hardened concrete is the variation of the cement particle size distribution. In this study, the performance of cements prepared by blending a coarse ASTM C150 Type I/II and a fine Type II...

Because most shrinkage-reducing admixtures (SRAs) significantly reduce the surface tension of a cement paste pore solution, they will naturally influence all physical properties and processes that are dependent in some way on surface tension. Such properties include internal relative humidity, capillary stresses, and freezing point depression, all via the Kelvin equation and its variants (Kelvi...

This paper presents the results of an experimental study dealing with the influence of water/cement (w/c) ratio and curing temperature on the autogenous deformations and self-induced stresses in early-age concrete. Two concrete mixes, w/c ratio 0.33 and 0.37, were cured isothermally at 10, 20, 30 and 40°C. The linear deformations of a free specimen and the self-induced stresses of a fully restr...