A composition for a cementitious roofing tile, the composition includes a cement binder making up 10% to 20% of a total composition weight; a fine aggregate sand making up 20% to 25% of the total composition weight; an aggregate making up 12% to 20% of the total composition weight; a crushed glass making up 15% to 60% of the total composition weight; an alkali-silica reaction (ASR) suppressant; and a predetermined volume of water; the aggregate is selected from one of perlite, vermiculite, hemp, expanded clay, coco coir, shale and slate; and the fine aggregate sand has an average particle size from a minimum of 1 micron to a maximum size of 2 mm; and the crushed glass has an average particle size that ranges from 1 micron to a maximum of 5 mm.

A composition includes flakes of mineral or plant-based wool, a powdered mineral binder and a water-repellent agent.

A composition includes flakes of mineral or plant-based wool, a powdered mineral binder and a water-repellent agent.

[Object] A high value-added material having excellent alkali resistance is developed by effectively utilizing waste material discharged from coal-fired power plants and copper slag discharged from copper smelters.

[Solution] With regard to a non-crystalline inorganic composition containing silica (SiO.sub.2), iron oxide (Fe.sub.2O.sub.3), alumina (Al.sub.2O.sub.3), and calcium oxide (CaO) as main components, when i) a total content of silica, alumina, and calcium oxide is set to be 50% by mass or more and 75% by mass or less; ii) a content of iron oxide is set to be 26% by mass or more and less than 40% by mass; and iii) iron oxide is derived from a non-crystalline raw material, an inorganic composition that can be melt-spun and has excellent alkali resistance is obtained. In this inorganic composition, most of the raw materials can be derived from coal ash and copper slag.

[Object] A high value-added material having excellent alkali resistance is developed by effectively utilizing waste material discharged from coal-fired power plants and copper slag discharged from copper smelters.

[Solution] With regard to a non-crystalline inorganic composition containing silica (SiO.sub.2), iron oxide (Fe.sub.2O.sub.3), alumina (Al.sub.2O.sub.3), and calcium oxide (CaO) as main components, when i) a total content of silica, alumina, and calcium oxide is set to be 50% by mass or more and 75% by mass or less; ii) a content of iron oxide is set to be 26% by mass or more and less than 40% by mass; and iii) iron oxide is derived from a non-crystalline raw material, an inorganic composition that can be melt-spun and has excellent alkali resistance is obtained. In this inorganic composition, most of the raw materials can be derived from coal ash and copper slag.

An acoustical tile having a wet laid mineral fiber basemat, a non-woven porous fiberglass veil adhered to the basemat and covered with a light reflecting air permeable coating, at least 90% of the weight of the basemat comprising mineral wool and binder, a weight of the binder being less than 1/11 of the weight of the mineral fiber, the basemat having a density of between about 11.4 and about 14.2 lbs/cubic foot, the mineral fiber having an average diameter of between 4.5 and 8.3 microns, the composite of the basemat, veil and coating exhibiting good NRC and CAC performance values.

An acoustical tile having a wet laid mineral fiber basemat, a non-woven porous fiberglass veil adhered to the basemat and covered with a light reflecting air permeable coating, at least 90% of the weight of the basemat comprising mineral wool and binder, a weight of the binder being less than 1/11 of the weight of the mineral fiber, the basemat having a density of between about 11.4 and about 14.2 lbs/cubic foot, the mineral fiber having an average diameter of between 4.5 and 8.3 microns, the composite of the basemat, veil and coating exhibiting good NRC and CAC performance values.

An acoustical tile having a wet laid mineral fiber basemat, a non-woven porous fiberglass veil adhered to the basemat and covered with a light reflecting air permeable coating, at least 90% of the weight of the basemat comprising mineral wool and binder, a weight of the binder being less than 1/11 of the weight of the mineral fiber, the basemat having a density of between about 11.4 and about 14.2 lbs/cubic foot, the mineral fiber having an average diameter of between 4.5 and 8.3 microns, the composite of the basemat, veil and coating exhibiting good NRC and CAC performance values.

An acoustical tile having a wet laid mineral fiber basemat, a non-woven porous fiberglass veil adhered to the basemat and covered with a light reflecting air permeable coating, at least 90% of the weight of the basemat comprising mineral wool and binder, a weight of the binder being less than 1/11 of the weight of the mineral fiber, the basemat having a density of between about 11.4 and about 14.2 lbs/cubic foot, the mineral fiber having an average diameter of between 4.5 and 8.3 microns, the composite of the basemat, veil and coating exhibiting good NRC and CAC performance values.