| US 7,537,653 B2 | ||
| Microsilica materials with improved pozzolanic activity | ||
| Armando Garcia Luna, Monterrey (Mexico); and Jaime Valenzuela Grado, Chihuahua (Mexico) | ||
| Assigned to GCC Technology and Processes S.A., Lausanne (Switzerland) | ||
| Appl. No. 10/599,441 PCT Filed Jul. 06, 2005, PCT No. PCT/IB2005/002161 § 371(c)(1), (2), (4) Date Sep. 28, 2006, PCT Pub. No. WO2006/079875, PCT Pub. Date Aug. 03, 2005. |
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| Claims priority of application No. PA/A/2005/001211 (MX), filed on Jan. 31, 2005. | ||
| Prior Publication US 2007/0209554 A1, Sep. 13, 2007 Prior Publication US 2009/0064899 A9, Mar. 12, 2009 |
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| Int. Cl. C01B 33/18 (2006.01); C01B 33/12 (2006.01); C04B 14/04 (2006.01) | ||
| U.S. Cl. 106—482 [106/287.34; 423/335] | 9 Claims |
1. A microsilica with pozzolanic activity that comprises silica containing 55 to 90% in weight of cristobalite and tridimite
with respect to the total weight of silica, wherein said microsilica has a particle size distribution equal to or less than
40 μm at 98%, wherein said microsilica includes:
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