Feb 1, 2022 · In this paper, we use SEM-EDX hypermaps to quantify the chloride sorption in hydrated an C3 S paste, after equilibrium in solutions of chloride salts (NaCl, KCl, CaCl 2, MgCl 2), with and without the addition of sodium hydroxide. The errors and uncertainties of the method are analysed to demonstrate the relevance of the method.

Oct 30, 2019 · We present new results on solid (monolithic) synthetic C-S-H made at room temperature from easily obtainable calcium sources (calcium oxide, calcium hydroxide) and nanosilica (w/s = 2) with a 2 minute mixing time.

Utilization of calcined limestone as supplementary cementing materials (SCMs) along with other additional SCMs (fly ash, silica fume, uncalcined lime-stone) can effectively influence the fresh...

Dec 1, 2023 · In this study, we systematically investigated the morphology change of outer C-S-H and inner C-S-H in real cement pastes, spanning from the induction period to several days after mixing, utilizing high-resolution SEM analysis.

Calcium silicate hydrate (CSH) gel is an important hydration product of cement, significantly influencing the coagulation and hardening processes, as well as the mechanical properties, volume stability, and durability of cement. Moreover, it …

The SEM images demonstrated that the concrete microstructure containing nanoparticles exhibited denser textures and showed fewer destructive effects and microcracks due to the nanoparticle ...

Aug 11, 2021 · Optimising the mesoscale structure of calcium-silicate-hydrate (C-S-H) is critical to achieving durable and sustainable infrastructure using Portland cement concrete. However, control of its...

Alkali doped calcium-silicate-hydrate (C-S-H) is a critical silicate material since the use of blended cements and alkali-acti... ... 0.5, 1, 5 M). Synchrotron X-ray diffraction was...

A new method for the nuclear magnetic resonance (NMR) surface relaxivity calibration in hydrated cement samples is proposed. This method relies on a combined analysis of 28-d hydrated tricalcium silicate samples by scanning electron microscopy (SEM) image analysis and 1 H-time-domain (TD)-NMR relaxometry.

Calcium silicate hydrates (CSH or C-S-H) are the main products of the hydration of Portland cement and are primarily responsible for the strength of cement-based materials. [1] They are the main binding phase (the "glue") in most concrete .