| 摘要 |
<p>PURPOSE:To provide a method for producing a high-strength hardened cement material exhibiting a low shrinkage by using a high-strength cement composition, especially a low-shrinkage and high-strength cement composition remarkably reduced in shrinkage factor during hardening process. CONSTITUTION:An alumina cement matter containing alumina cement, a superfine powder and a dispersant is kneaded with a hardening controlling agent and water. The resultant kneaded material is blended and kneaded with an ettringite product matter containing an ettringite product to form a hardened cement. The formed material is cured, thus producing the objective high-strength hardened cement material. This production method enables remarkable reduction of shrinkage during hardening process and production of a high-strength hardened cement material exhibiting >=300kgf/cm<2> bending strength after drying at 110 deg.C for one day.</p> |
