Tests of reinforced concrete beams : modulus of elasticity for various ages and mixtures . U. OF I. 3. S. KOnw 3 .30AO .60 / f r yO rs § s ^ ^ s I I s § N ^ ^ ^ K ^ ^ X 7aao \ Si 3000. /Jo^ M z:^/7yj /v^/Z Z/>B5- /:>//^00/V/i/L~ Z?^/=z T-/ I /A/. U- OF t. S. S. FORM 3 3o 40 k o © o o © o / O O o I I I I I I Nj \ \

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