Mechanical and Durability Evaluation of Concrete with Sulfate Solution Corrosion

Table 1

PO 42.5 performance index of Portland cement.

Specific surface area m^2⋅kg^−1	Chloride ion	Alkali content	Sulphur trioxide	Ignition loss	Setting time [min]		Compressive strength [MPa]
					Initial	Final	3 days	28 days
347	0.012	0.43	2.44	1.52	185	325	21.7	48.6

Sand: well-graded medium river sand, the fineness modulus being 2.7; stones: continuous grading gravel, 5~20 mm; Na₂SO₄: analytical reagent with a quality fraction of 99.28% and the relative molecular mass being 142.04; the running water was used to mix these raw materials.