Quantitative Hydrated Silicate Monomer in Hydration of Alite and Consideration of Cement Hydration Mechanism

豊春, 名和; 友貴, 粟村; 埈範, 朴; 祐加, 森永

doi:10.14250/cement.69.2

Cited by 1 publication

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“…The cause of this is an intermediate phase existing time between C-S-H formation and dissolution of alite [Bellmann et al, 2010;Pustoger et al, 2016]. Therefore, when we consider the hydration reaction of alite, it is necessary to investigate both of the dissolution rate of alite and the precipitation of C-S-H [Nawa et al, 2015]. Figure. 5, the dissolution of alite didn't be proceeded by Seeding as compared with control, except for the change of the age of 1 to 6 hours in CSH-0.8 additive.…”

Section: Characterization Of Synthesized C-s-hmentioning

confidence: 99%

The effect of seeding of synthesized C-S-H with different C/S on early hydration reaction of alite

Abe

Morinaga

Nawa

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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Cementitious materials containing admixtures such as industrial waste or by-products is highly expected for environment and sustainable development. These materials have problems with slow hydration, and the use of a hydration accelerator is an effective solution. Therefore, in this study, authors focused on synthesized C-S-H among hydration accelerators, detailed characterization was carried out on the synthesized C-S-H with different Ca/Si ratio(C/S), and the effect of this C-S-H on the initial hydration reaction of alite was investigated. As a result, it was elucidated that seeding greatly influences the precipitation of C-S-H rather than the dissolution of alite. Moreover, it was confirmed that addition of synthesized C-S-H with low C/S promotes initial C-S-H precipitation, while hydration rate and amount of C-S-H precipitation at the late hydration stage and MCL of generated C-S-H don't depend on C/S of synthesized C-S-H. According to these results, addition of synthesized C-S-H with low C/S to cementitious materials may be solve the problem of initial strength of cementitious materials using admixtures such as industrial waste or by-products.

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Section: Characterization Of Synthesized C-s-hmentioning

confidence: 99%