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ln this s田 dy， the prediction equation of drying shrinkage of concrete is obtained w 産 th two − phase composite 血 odel as aggregate and matrix ． In order to obtain the input values for this prediction equation easily ， the experimental fbrmula of drying shrinkage and young ' s modu 皇 us of ceme 飢 paste are ob 面 ned ， and the estimation method of young ' s modulus of aggreg 飢 e are proposed w 童 th easy test using cement paste ， mortar and concrete ． According to the experimental results ， this equa ！ ion can predict the drying shrinkage at any age in elTor by less than about 100 μ ． 1(eyw ・ rdS ： drying shrinkage ， C ・ncrete ， pred ' 伽 n eq 翩 厭 C ・ 〃 ・site ・ m ・del ， C 跏 8 即 α5 ' e． 、 y ・ "ng ' S m ・du ' 配∫

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