In the United States, a standard dump truck has one front steering axle, and one or two rear axles which typically have dual wheels on each side. Tandem rear axles are virtually always powered in the U.S., far less often in Europe.
A silicate is a compound containing an anionic silicon compound. The great majority of silicates are oxides, but hexafluorosilicate ([SiF 6 ] 2â) and other anions are also included. Orthosilicate  is the anion SiO 4 4â or its compounds.Related to orthosilicate are families of anions (and their compounds) with the formula [SiO 2+n ] 2nâ .he great majority of silicates are oxides, but hexafluorosilicate ([SiF 6 ] 2â) and other anions are also included.  Orthosilicate  is the anion SiO 4 4â or its compounds. Related to orthosilicate are families of anions (and their compounds) with the formula [SiO 2+n ] 2nâ .
: a salt or ester derived from a silicic acid; especially: any of numerous insoluble often complex metal salts that contain silicon and oxygen in the anion, constitute the largest class of minerals, and are used in building materials (as cement, bricks, and glass). See silicate defined for English-language learners.