| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restrain the deterioration of the compressive strength of cement clinker of long-term material age, which deterioration is observed when phosphorus-containing waste is used as a raw material for cement from the viewpoint of waste treatment, when the cement clinker (for example, moderate heat portland cement), the silica modulus of which is lowered to restrain the initial heat of hydration, is manufactured. <P>SOLUTION: The phosphorus-containing waste and other raw materials are blended with one another so that the fired portland cement clinker has 1.80-2.15 hydraulic modulus (HM), 2.8-4.5 silica modulus (SM), 0.05-2.0 mass% P<SB>2</SB>O<SB>5</SB>content and≤1.0 mass% MgO content. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
