Development of low pH cement systems forming magnesium silicate hydrate (M-S-H)
By Tingting Zhang, Chris Cheeseman, L. Vandeperre. 2011
330 citations recorded by the source corpus.
This work aimed to develop novel cement systems for waste encapsulation that would form with a pH of around 10. The approach taken was to investigate the formation of brucite by hydration of a light burned periclase (MgO). Commercially available MgO powders often contain some CaO, and therefore silica fume was added to form C-S-H gel. Identification of the hydrated phases in MgO/silica fume samples showed that brucite formed in substantial quantities as expected. However, brucite reacted with the silica fume to produce a magnesium silicate hydrate (M-S-H) gel phase. After 28 days, the pH of systems rich in MgO tended towards the pH controlled by residual brucite (~ 10.5), whereas when all brucite reacts with silica fume a cement with an equilibrium pH just below 10 was achieved.
Subfields: Civil and Structural Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/21f84a074f604b1986b6b1280fe67cf22a62607c
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Civil and Structural Engineering
- Ö. Cizer
- G. Mertens
- B. Lothenbach
- L. Vandeperre
- L. Vandewalle
- Koen Van Balen
- Y. Pontikes
- Tingting Zhang
In Materials Chemistry
- B. Lothenbach
- L. Vandeperre
- Ö. Cizer
- Bart Blanpain
- Y. Pontikes
- Tingting Zhang
- Chris Cheeseman
- G. Mertens
Citations in the corpus
- Crystal structure of magnesium silicate hydrates (M-S-H): The relation with 2:1 Mg–Si phyllosilicates (2015, background): “M-S-H have been described in many different environments, including low pH concretes [1–11].”
- Effect of mechanical activation on the hydraulic properties of stainless steel slags (2012, background): “Three possibilities are plausible: a) Mg forms M–S–H gel, in view of the knowledge that M–S–H and C–S–H gels are practically immiscible [56], b) a fraction of Mg is incorporated in the C–S–H gel [53,54,57] or c) Mg precipitates as Mg(OH)2 or other hydroxides [56,58].”
- Formation of magnesium silicate hydrate (M-S-H) cement pastes using sodium hexametaphosphate (2014, background): “[8,9] during a work on the encapsulation of nuclear wastes containing trace metal contaminants.”