A Prediction Method of Tensile Young's Modulus of Concrete at Early Age

Table 3

Mixture proportions of concrete.

ID	W/C (%)	Water (kg/m^3)	Cement (kg/m^3)	S (kg/m^3)	G (kg/m^3)	WRA (kg/m^3)	Air (%)
O57	57	165	290	812	1030	2.9	4.5
O57m^#1	57	265	466	1304	—	4.7	—^#2
O39	39	169	434	790	933	4.3	3.8
O39m^#1	39	257	659	1200	—	6.5	—^#2
O25	25	170	680	694	818	6.8	3.6
O25m^#1	25	243	971	991	—	9.7	—^#2

^#1Mortar is made from wet screening of concrete (maximum mesh size: 5 mm).
^#2Air content of mortar was not measured because it is difficult to obtain wet-screened mortar volume required for the test.