| http://www.w3.org/ns/prov#value | - Examples of the aggregates may include, for example, ordinary aggregates, such as silica sand, silica powders, pulverized natural stones including lime stone, granite, andesite, and marble, or blast furnace slag; or light-weight aggregates such as Shirasu balloons, glass balloons, or sintered products of expansive clay, expanded shale, vermiculite, obsidian, or pearlite.
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