|
| TABLE 6 | ||||||||||||
| RAW MATERIALS USED TO PRODUCE CLINKER AND CEMENT IN THE UNITED STATES1, 2 | ||||||||||||
| (Thousand metric tons) | ||||||||||||
| 2012 | 2013 | |||||||||||
| -Material | Clinker | Cement3 | Clinker | Cement3 | ||||||||
| Calcareous: | ||||||||||||
| Limestone (aragonite, chalk, coral, marble) | 86,800 | 1,720 | 90,530 | 1,930 | ||||||||
| Cement rock (includes marl) | 8,310 | 12 | 9,410 | 23 | ||||||||
| Cement kiln dust (CKD)4 | 10 | 137 | 50 | 136 | ||||||||
| Lime4 | 40 | 53 | 73 | 38 | ||||||||
| Other | 80 | 9 | 75 | 4 | ||||||||
| Aluminous: | ||||||||||||
| Clay | 3,310 | -- | 3,260 | -- | ||||||||
| Shale and schist | 2,330 | 50 | 2,130 | 39 | ||||||||
| Other5 | 418 | -- | 545 | -- | ||||||||
| Ferrous: | ||||||||||||
| Iron ore | 608 | -- | 671 | -- | ||||||||
| Mill scale | 713 | -- | 656 | -- | ||||||||
| Other6 | 25 | -- | 84 | -- | ||||||||
| Siliceous: | ||||||||||||
| Sand, calcium silicates | 3,170 | -- | 3,100 | -- | ||||||||
| Sandstone, quartzite, soils, nonpozzolanic rocks | 563 | -- | 738 | -- | ||||||||
| Fly ash | 2,410 | 137 | 2,580 | 135 | ||||||||
| Other ash, including bottom ash | 1,230 | -- | 1,050 | -- | ||||||||
| Granulated blast furnace slag7 | 8 | 224 | -- | 237 | ||||||||
| Other blast furnace slag | 85 | -- | 35 | -- | ||||||||
| Steel slag | 444 | -- | 390 | -- | ||||||||
| Other slag | 84 | -- | 199 | -- | ||||||||
| Natural rock pozzolans8 | -- | 40 | -- | 52 | ||||||||
| Other pozzolans9 | 5 | 2 | 1 | 3 | ||||||||
| Other: | ||||||||||||
| Gypsum and anhydrite | (10) | 3,920 | (10) | 4,020 | ||||||||
| Miscellaneous11 | 76 | 39 | 38 | 27 | ||||||||
| Total12 | 111,000 | 6,340 | 116,000 | 6,640 | ||||||||
| Clinker, imported, raw materials equivalent13 | -- | 1,390 | -- | 1,260 | ||||||||
| Grand total12 | 111,000 | 7,730 | 116,000 | 7,890 | ||||||||
| -- Zero. | ||||||||||||
| 1Excludes Puerto Rico. | ||||||||||||
| 2Data have been rounded to no more than three significant digits. | ||||||||||||
| 3Includes portland, blended, and masonry cements. | ||||||||||||
| 4Data are probably underreported. | ||||||||||||
| 5Includes alumina, aluminum dross, bauxite, spent catalysts, and other aluminous materials. | ||||||||||||
| 6Includes iron sludges, pyrite, and other ferrous materials. | ||||||||||||
| 7Includes both ground and unground material. | ||||||||||||
| 8Includes pozzolana and burned clays or shales (except where directly reported as clay or shale). | ||||||||||||
| 9Includes diatomite, silica fume, other microcrystalline silica, and other pozzolans, even if not used as such. | ||||||||||||
| 10Included with Calcareous: Other. | ||||||||||||
| 11Includes fluorspar and all other materials not listed earlier. | ||||||||||||
| 12May not add to totals shown because of independent rounding. | ||||||||||||
| 13Converted as 1.7 times the weight of foreign clinker consumed. | ||||||||||||
Source: United States Geological Survey Mineral Resources Program
See also: Mineral commodity prices
