Studies on guest-ion incorporation in Portland cement – Part 2

Using solid-state NMR spectroscopy allows identification of the incorporation of guest ions in minor components in the phases of Portland cement clinker. In the second part of the article, further examples of possible element characterizations are shown.

4 Aluminum and sulphur guest-ions in alite and belite

Limestone is increasingly being used as an additive to Portland cement [22] where a part of it will react with the hydrating aluminate species, released by dissolution of the calcium aluminate and ferrite phases or the Al3+ guest ions in alite and belite, and form calcium monocarboaluminate hydrate (Ca4Al2(OH)12CO3 · 5H2O). Thus, limestone acts not only as a filler but contributes also to the strength development by the formation of this phase. For traditional mixtures of Portland cement and limestone, the optimum performance is achieved at...

Related articles:

Issue 2013-04

Studies on guest-ion incorporation in Portland cement – Part 1

1 Introduction Nuclear Magnetic Resonance (NMR) techniques have been increasingly employed in studies of cementitious materials over the last three decades [1-3]. The main advantages of the basic...

Issue 2020-11-12 EP 3 718 985 A1

Narrow PSD hydraulic cement-SCM blends

(22) 14.04.2011 (43) 07.10.2020 (57) Hydraulic cements, such as Portland cements and other cements that include substantial quantities of tricalcium silicate (C3S), dicalcium silicate (C2S),...

Issue 2015-9 US 9 073 784 B2

Calcium sulfoaluminate cement with ternesite

(22) 16.07.2012 (45) 07.07.2015 (57) The present invention relates to a ternesite calcium sulfoaluminate clinker as well as a ternesite clinker containing 20 to 100?% by weight of C5S2$ and less than...

Issue 2016-6 US 2016/0107933 A1

Belite-calcium aluminate as an additive

(22) 07.05.2014 (43) 21.04.2016 (57) The present invention relates to the use of a belite calcium aluminate obtainable in a method comprising the following steps: a) providing a starting material...

Issue 2015-10 US 9 102 567 B1

Engineered Portland cement incorporating SCMS and methods for making same

(22) 30.05.2013 (45) 11.08.2015 (57) Engineered cements are described that include an engineered clinker fraction designed for use with one or more supplementary cementitious material (“SCM”)...