| 摘要 |
<p>Fast setting hydraulic cement having very high compressive strengths within a few hours of mixing with water, and generally from about 2,900 to over 5,000 p.s.i. within 24 hours, containing beta 2CaO.SiO2; 3CaO.3A12O3CaSO4; and chemically unbound CaSO4 obtained by firing at a temperature between about 1,200 and 1,600 DEG C for about 1 to 5 hours a mixture of a source respectively of CaO, SiO2, Al2O3 and SO3 in proportions of about 1 to 3 moles of CaSO4 to about 0.5 to 2 plus 2n moles of CaCO3 per mole of Al2O3.nSiO2 and grinding the resultant clinker.</p> |
