,

)

evp

Where ρ

and ρ are correspondingly density of coarse aggregate grains

c.a

m

in cement paste and mortar density; W

is weight of evaporated water

evp

that forms additional pores volume.

176

W

value can be found by general water content (W) of concrete mix and

evp

its part, chemically bound with cement:

W

≈ W