| 摘要 |
Improved methods for the production of lightweight, rigid, insulative perlite/cement solid articles such as bricks ( 62 ) are provided wherein expanded perlite is first treated with a cement binder followed by application of cement with subsequent mixing and forming. In preferred forms, a continuous belt ( 12 ) is provided with laterally spaced apart stations ( 22 - 28 ) for application of perlite, binder, water and Portland cement, respectively, onto the belt ( 12 ); these materials are then mixed in a drum mixer ( 38 ) to produce a mixture ( 61 ) which is poured into a frame assembly ( 44 ) for final curing/hardening.
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