Efficient methods of grinding volcanic pumice and its use in making cementitious composites
AssigneeKing Faisal University
InventorsMuhammad Nasir Amin, Kaffayatullah Khan, Majdi Adel Al-Faiad
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Abstract
A cement composition is provided including a cementitious matrix containing Portland cement and a volcanic pumice component incorporated within the cementitious matrix. The volcanic pumice component is prepared by grinding in a ball mill using tungsten balls. The ball mill uses a tungsten carbide bowl of capacity 250 ml and the 12 tungsten carbide balls each having a diameter of about 20 mm. The volcanic pumice component is prepared in the ball mill at a speed of about 500 rpm for a duration about 10 minutes, about 1 hour, and about 3 hours. The volcanic pumice component is included in an amount of between about 10% w/w and about 30% w/w.
Claims4
A cementitious composition, comprising:
- a cementitious matrix containing Portland cement;
- and
- a volcanic pumice component incorporated within the cementitious matrix, wherein the volcanic pumice component is prepared by grinding in a ball mill at 500 rpm for 10 minutes using 12 tungsten carbide balls of diameter 20 mm each in a 250 ml capacity tungsten carbide bowl,
- wherein the volcanic pumice component is about 10% w/w of the cementitious composition, and
- wherein the volcanic pumice component has a d10 particle size of about 4.5 microns, a d50 particle size of about 5.5 microns and a d90 particle size of about 14.8 microns, and wherein the cementitious composition has a compressive strength of 53.4 MPa after 7 days, 55.2 MPa after 28 days and 67.3 MPa after 91 days.
A cementitious composition, comprising:
- a cementitious matrix containing Portland cement;
- and
- a volcanic pumice component incorporated within the cementitious matrix, wherein the volcanic pumice component is prepared by grinding in a ball mill at 500 rpm for 10 minutes using 12 tungsten carbide balls of diameter 20 mm each in a 250 ml capacity tungsten carbide bowl,
- wherein the volcanic pumice component is about 20% w/w of the cementitious composition, and
- wherein the volcanic pumice component has a d10 particle size of about 4.5 microns, a d50 particle size of about 5.5 microns and a d90 particle size of about 14.8 microns, and wherein the cementitious composition has a compressive strength of 48 MPa after 7 days, 62.6 MPa after 28 days and 70.4 MPa after 91 days.
Dependencies are inferred from the claim text.