Experimental Investigation of MgAl-NO₂ and MgAl-CO₃ LDHs on Durability of Mortar and Concrete

Table 8

Mass fraction of each substance in concrete carbonation zone (%).

Sample	L-0	NL-2	CL-2	H-0	NH-2	CH-2
SiO2	13.8	12.7	9.1	29	33	34.1
CaCO3	11.5	7.9	5.7	11.1	10	9.4
CaMg(CO3)2	49.7	67	73.8	24.6	26.4	20.5
Ca(OH)2	0.7	0.2	0.2	1.2	1.2	1.3
Ettringite	16.2	9.1	7.9	22.8	16	23.6
Others	8.1	3.1	3.3	11.3	13.4	11.1