[1010] IMPACT OF NANO-TiO2 PARTICLES ON DRYING SHRINKAGE OF HARDENED CEMENT UNDER THE FIRST DRYING
キーワード：BET surface area, calcium silicate hydrate(C-S-H), drying shrinkage, nitrogen sorption, TiO2 nanoparticle, water vapor sorption, ナノTiO2粒子, カルシウムシリケート水和物, 乾燥収縮, 窒素吸着, 水蒸気吸着, BET比表面積
This paper reports the influence of nano-TiO2 given to shrinkage behavior of hardened cement pastes under the first drying process. Cement pastes containing 3% nano-TiO2 (by external addition) by mass of cement were prepared. During the hydration process, nano-TiO2 increased the precipitation amount of low density C-S-H. As a result, it was confirmed that the drying shrinkage of the cement paste with nano-TiO2 in the first drying process was increased, in W/C ratio was 0.55.