Portland Cement Basics

Portland Cement is a mixture of Limestone (CaCO 3 ), mixed with a second material containing clay as source of alumino-silicate. Because clay is needed, usually an impure limestone which already contains some clay is used. The impure Limestone must be made of at least 80% Limestone. Depending on the purity of the limestone and … Continue reading Portland Cement Basics

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Some of my Google Earth Overlays for China – GDP Map, Population Map, & My Updated Province Map, with Legends

These are my own KMZ Overlay Files I created for Google Earth, for China My China Per Capita GDP Map Overlay I Created for Google Earth, with a Color-coded Legend Download Here: Kalani's China GDP Overlay My China Population Google Earth Overlay, also with Color-coded Legend Download Here: Kalani's China Population Overlay My China Updated … Continue reading Some of my Google Earth Overlays for China – GDP Map, Population Map, & My Updated Province Map, with Legends