Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures

Table 1

Chemical compositions of the two pozzolanic cements.

Oxide (wt.%)	CEM IV/B (P)	CEM IV/B (V)
SiO2	27.78	30.69
Al2O3	8.18	11.17
Fe2O3	5.27	5.24
CaO	44.67	42.68
MgO	2.75	1.46
SO3	2.69	2.63
K2O	2.93	1.35
Na2O	0.41	0.19
Na2Oeq	2.34	1.08
LOI	2.53	3.12
Total	97.21	98.53