Effect of Superabsorbent Polymer (SAP) Internal Curing Agent on Carbonation Resistance and Hydration Performance of Cement Concrete

Table 2

Physical and mechanical properties of cement.

Normative indices	Setting time/min		Flexural strength/MPa		Compressive strength/MPa
	Initial set	Final set	3 d	28 d	3 d	28 d
	203	450	5.9	7.7	27.4	45
PO.42.5	≥45	≤600	≥3.5	≥6.5	≥17.0	≥42.5