Experimental Investigation of the Variation of Concrete Pores under the Action of Freeze-Thaw Cycles by Using X-Ray CT

Table 1

Mix proportions of concrete used for experiment.

Number	Amount of concrete per cubic meter (kg/m^3)				Water-cement ratio	Sand (%)	28-day compressive strength (MPa)
	Cement	Water	Sand	Stone
A	380	190	659	1121	0.5	37	35.5
B	430	172	664	1084	0.4	38	46.4
C	477	138	622	1262	0.29	33	60.5