| 11. | Nonetheless, he is credited with launching the " modern " Portland cement industry.
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| 12. | Companies such as Allied Signal and Alpha Portland Cement did build in town.
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| 13. | From the Gaven, about, the road surface is portland cement concrete.
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| 14. | Sand, Portland cement, and thousands of minerals are examples of silicates.
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| 15. | David O . Saylor perfected and patented the process of manufacturing Portland Cement.
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| 16. | Furthermore, fewer skilled workers are required in building a structure with Portland cement.
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| 17. | The most common use for Portland cement is in the production of concrete.
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| 18. | Portland cement is generally known for its low heat of hydration.
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| 19. | The abutments are made of unreinforced Portland cement concrete in the Cyclopean style.
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| 20. | Portland cement releases too much carbon dioxide, he contends, contributing to global warming.
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