The Effect of Synthetic Hydrated Calcium Aluminate Additive on the Hydration Properties of OPC

Table 4

The values of the main diffraction peak area of ettringite in OPC, OPC-CAH1, and OPC-CAH2 samples.

Composition	Hydration time (h)
	0	1.8	3	5.5	9.5	13	16.5	24
OPC	—	0.14	0.15	0.26	0.40	0.60	1.00	1.45
OPC-CAH1	—	0.15	0.37	0.42	0.89	0.90	1.18	1.39
OPC-CAH2	—	0.21	0.22	0.54	0.51	1.03	1.18	1.30