Note on Cement-Lime Mortars versus Masonry-Cement Mortars
At times in the past, and to some extent even to this day, controversy has existed within the masonry technical community over the comparative performance of cement-lime mortar and …
Tag: cement
Cement composites Terminology
A number of subject specific terms are useful in order to discuss concisely frc structure and behaviour. The term frc itself can refer to either fibre-reinforced cement or fibre-reinforced …
Use of supplementary cementing materials (SCMs)
Supplementary cementing materials (SCMs) are materials that contribute to the properties of concrete through either pozzolanic reaction (e.g., low-calcium fly ash, silica fume, or calcined clay), or hydraulic reaction …
Alkalis in Portland cement
The predominant source of alkalis in concrete is the Portland cement. As noted in Chapter 2, Portland cement contains relatively minor amounts of both sodium (Na) and potassium (K) …
Carbonation and its effects
As noted previously, the reactions between atmospheric CO2 and alkaline components of concrete produce a carbonated surface layer in which the pore solution pH value is depressed to near-neutral …