Impacts of Space Restriction on the Microstructure of Calcium Silicate Hydrate
Open Access
- 30 June 2021
- Vol. 14 (13), 3645
- https://doi.org/10.3390/ma14133645
Abstract
The effect of hydration space on cement hydration is essential. After a few days, space restriction affects the hydration kinetics which dominate the expansion, shrinkage and creep of cement materials. The influence of space restriction on the hydration products of tricalcium silicate was studied in this paper. The microstructure, morphology and composition of calcium silicate hydrate (C-S-H) were explored from the perspective of a specific single micropore. A combination of Raman spectra, Fourier transform infrared spectra, scanning electron microscopy and energy dispersive X-ray spectroscopy were employed. The results show that space restriction affects the structure of the hydration products. The C-S-H formed in the micropores was mainly composed of Q3 silicate tetrahedra with a high degree of polymerization. The C-S-H formed under standard conditions with a water to cement ratio of 0.5 mostly existed as Q2 units. Space restriction during hydration is conducive to the formation of C-S-H with silica tetrahedra of a high polymerization degree, while the amount of water filling the micropore plays no obvious role on the polymeric structure of C-S-H during hydration.Funding Information
- the fund of National Natural Science Fund of China (51772212)
This publication has 54 references indexed in Scilit:
- The improvement of freezing–thawing resistance of concrete by cellulose/polyvinyl alcohol hydrogelConstruction and Building Materials, 2021
- Hydration characteristics assessment of a binary calcium sulfoaluminate-anhydrite cement related with environment temperatureJournal of Thermal Analysis and Calorimetry, 2021
- Effect of curing time on the hydration and material properties of cold-bonded high-calcium fly ash–Portland cement lightweight aggregateJournal of Thermal Analysis and Calorimetry, 2020
- Advances in understanding cement hydration mechanismsCement and Concrete Research, 2019
- Effect of temperature on the microstructure of calcium silicate hydrate (C-S-H)Cement and Concrete Research, 2013
- EFFECT OF WATER-BINDER RATIO ON SILICATE STRUCTURES AND HYDRATION OF SILICAFUME CEMENTCement Science and Concrete Technology, 2011
- The effect of curing temperature on white cement hydrationConstruction and Building Materials, 2009
- FUNDAMENTAL STUDY ON DENSITY OF C-S-HCement Science and Concrete Technology, 2009
- Composition and density of nanoscale calcium–silicate–hydrate in cementNature Materials, 2007
- Characterization of C‐S‐H from Highly Reactive β‐Dicalcium Silicate Prepared from HillebranditeJournal of the American Ceramic Society, 1994