Effect of Calcium Additions on N–A–S–H Cementitious Gels

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

This paper reports a research on the properties of synthetic sodium aluminosilicate hydrate gels as models for the gels arising in alkali-activated aluminosilicate systems. The interaction between these N–A–S–H gels and aqueous calcium was studied to explore a potential consequence of mixing conventional Portland cements and alkali-activated systems. The properties of two N–A–S–H gels (with Si/Al=1 and 2) synthesized in highly alkaline media, in the presence of calcium are reported. N–A–S–H gels were synthesized using aluminum nitrate, sodium hydroxide, and a sodium silicate. FTIR, NMR, and TEM/EDX techniques were used to characterize N–A–S–H gels before and after adding calcium. The results obtained show that calcium is uptaken in N–A–S–H gels resulting in a modification of the chemical composition due to the substitution of sodium per calcium.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2010.03668.x

Affiliations: 1: Eduardo Torroja Institute (C.S.I.C), Madrid 28033, Spain 2: Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K.

Publication date: July 1, 2010

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more