| 摘要 |
<p>This invention pertains to a process of making ASTM quality masonry cement, mortar cement, and stucco cement (also called plastic cement) and to the products themselves which are useful in making ASTM quality mortar for masonry construc-tion or ASTM quality stucco for plastering construction. These cements are classified as hydraulic cements and are made using selected pozzolan(s), such as natural pozzolan and fly ashes, Portland Cemen t, hydrated lime, and an air-entraining agent. Other additives, such as fibers, may be added to further modify its properties. Th e pozzolans act as functional ingredients in the mix rather than as a filler. As a result, concentrations of greater than 25 wt.% and mo re pozzolan can be produced.</p> |
