... ye’elimite–calcium sulfate and C₃A–calcium sulfate mixtures were investigated by isothermal calorimetry. The results were complemented by Brunauer–Emmett–Teller surface area analysis, X-ray diffraction and thermogravimetric analysis. The results demonstrate that both PCEs and increasing dosages...

... up to 28 days. Heat flow calorimetry, quantitative X-ray diffraction and thermodynamic modelling were used to follow the hydration process. The samples at 10°C were strongly retarded and the degree of hydration (DoH) of tricalcium aluminate (C₃A) was low. At 40°C, the samples were...

... gypsum reacting with tricalcium aluminate (C₃A) to form significant quantities of ettringite, enhancing the dissolution and hydration of tricalcium silicate. However, excessive gypsum led to excessive SO₄²⁻ adsorption on C₃A surfaces, inhibiting its hydration...

.... A PANalytical X'Pert Pro diffractometer with a cobalt anode, operating energy of 40 keV and an operating current of 40 mA was used for XRD analysis. Diffraction angles of the hydrated C₃A samples were determined in the range 2θ = 5–100°, in steps of 0.0167°, with an acquisition time of 0.475...

...Renhe Yang; Tingshu He The objective of this study was to explore the influence of an alkali liquid accelerator based on sodium aluminate (ASa) on the early hydration behaviour of cement paste, tricalcium aluminate (C₃A) and tricalcium silicate (C₃S) and identify its...

.... In this study, a calcium aluminate clinker was prepared from steel ladle slag by modifying its mineral composition. The slag paste, prepared by mixing slag with water, exhibited flash setting behaviour due to the presence of C₁₂A₇ and C₃A phases. In contrast, the slag clinker...

... on the carbonation properties and morphology of tricalcium aluminate (C₃A) and tricalcium silicate (C₃S) hydration products. After an accelerated carbonation test, the relative contents of ettringite (AFt), calcium hydroxide (CH) and calcium carbonate (CaCO₃) in the hydration...

... of tricalcium aluminate (C₃A) additive. The results indicate: products with higher side chain densities also have correspondingly shorter main chains, which allows them to form conformations with comparable initial adsorption performance; with C₃A added, samples with denser side chains...

...) 2 k = A e − ( E a / R T ) 20 10 2016 12 04 2017 12 04 2017 ICE Publishing: All rights reserved 2017 C3A calcium sulfate kinetics Previous work by the authors (Li et al., 2014a) explored the formation kinetics of calcium...