Quick hardening sulphoaluminate cement

special cement Rapid-hardening Sulphoaluminate Cement Table 1-1 The Basic Requirements of National Standard GB20472-2006 on the Performances of Rapid-hardening Sulphoaluminate Cement The Basic Requirements of National Standard GB20472-2006 on the Performances of Rapid-hardening Sulphoaluminate Cement StrengthSpecific Surface Area (m2/kg)Setting Time (min)Compressive Strength (Mpa)Breaking Strength (Mpa)GradeInitialFinal1day2 days28 days1 day3 days28 days42.5> 350> 25< 1803342.44566.5752.5> 350> 25<1804252.5556.577.562.5> 350> 25<18050626577.5872.5> 350> 25<1805672.5757.588.5 Rapid-hardening sulphoaluminate cement is mainly used in: 1.The special projects, such as rush-repair works, urgent projects, winter construction works, railway tunnel projects, anticorrosive projects, etc. 2.The production of electric poles and other cement parts, GRC decorative components, decorative wallboards 3.The production of GRC products such as, cast-in-place concrete cored mandrel, GRC wallboards, ventilating flue, etc 4.The configuration of special project materials.