Patent ID: 9034101
Filing Date: 2015-05-19
Classification: C04B,Y02W

Abstract:
1. A method for manufacturing of supplementary cementitious materials for replacement of Portland cement in production of mortars and concretes, where the supplementary cementitious materials comprise natural pozzolans in the form of rocks and ashes, comprising: subjecting said natural pozzolans in a crushed state to a high energetic mechanical processing by grinding in a grinding equipment, whereby the pozzolan particles receive mechanical impulses, wherein the grinding is carried out for a sufficient time to yield a test result according to ASTM C 109 for a compressive strength of a 2 inch side cube of mortar comprising 80% Portland cement and 20% of the supplementary cementitious material in a ratio of 1:2.75 to standard sand which after 28 days is 75% of the compressive strength of a comparative 2 inch side cube comprising a ratio of Portland cement:sand of 1:2.75, wherein the natural pozzolans after grinding has a final particle size distribution of ≦5 microns 15-50%, ≦10 microns 30-65%, and ≦30 microns 90-95%.