![]() ![]() Type III cement offers expedited early-age strength development. Concrete made with Type II cement can be useful for underground structures in areas where soil and groundwater contain moderate levels of sulfates, as well as in roadways, transportation products, and more. ![]() Type II cement is specified in scenarios where the concrete product is required to exhibit increased resistance to sulfates. Type I cement is considered a general, all-purpose cement and is used when the special properties of the other cement types are not required. Type I – Normal/General Purpose Type II – Moderate Sulfate Resistance Type III – High Early Strength Type IV – Low Heat of Hydration Type V – High Sulfate Resistance ![]() Portland cement is available in numerous varieties, each comprised of precise quantities of various materials that are designed for specific concreting applications.ĪSTM C150, “Standard Specification for Portland Cement,” outlines 10 cement types, five of which are generally regarded as the primary types of cement used in precast plants: Ingredients in modern portland cements are carefully selected, manufactured, tested, and regulated for quality and consistency. Today, we primarily use portland cement in our concrete. Europeans in the Middle Ages used hydraulic cement to construct canals and fortresses, some of which still stand today. Romans employed a pozzolanic cementitious blend to construct aqueducts and other engineering marvels including the Pantheon, whose roof is still the largest unreinforced concrete dome in the world. Egyptians used a blend of cementitious materials as a mortar to secure each 2.5-ton quarried stone block of the Great Pyramid more than 4,500 years ago. Editor’s Note: This is the second article in a year-long series explaining common raw materials used in precast.Įvidence of cementitious material use dates back to the beginning of recorded history. ![]()
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