Manufacturing Procedure for Supplementary Cementing Materials (SCMS)

摘要

Process of manufacturing supplementary cementitious materials for the replacement of Portland cement in the production of mortars and concrete, where the cementing materials comprise natural pozzolans in the form of rocks and ashes, characterized in that said pozzolans in the crushed state undergo a processing Highly mechanical mechanic 5 by grinding in a grinding equipment, so that the pozzolan particles receive mechanical impulses, and because the grinding is done for a predetermined time, and because the final product of the pozzolan after grinding has the following particle size distribution: 5 micrometers 15-50%, 10 micrometers 30-65%, 30 micrometers 90-95%, and because a mixture of ground pockets, Portland cement and water results in resistance to compression of a 5.08 cm cube on the side of a mortar comprising 80% Portland cement and 20% natural pozzolan in a 1: 2.75 ratio with respect to conventional sand and additional water is required to obtain a mortar flow in accordance with American standard ASTM C 109, which has been properly compacted under vibration and hardened at + 20 ° C in the condition sealed, which after 28 days is 75% of the compressive strength of a 5.08 cm cube side, treated as said cube, of a mortar comprising a proportion of Portland cement: 1: 2 sand, 75 and additional water corresponding to 48.5% of the weight of Portland cement.