Portland Cement Manufactured from some of the earth’s most common minerals – limestone and shale – Portland cement is combined with stone, sand and water to create a chemical reaction that becomes concrete. The limestone and shale are finely ground and moved through a kiln, where they are burned at 2800 degrees Fahrenheit to form a new material called clinker. A small amount of gypsum is blended with the clinker and then ground again into a fine powder to form cement. Modern Portland cement can trace its roots to 1756 when a British civil engineer experimented with various limestones and additives to construct a lighthouse. The name “Portland” comes from the cement’s similarity to Portland stone, which is quarried in England on the Isle of Portland. Monarch has been creating high-quality Portland cement at our Humboldt plant since it opened in 1909, and all of our Portland cements conform to ASTM C-150. Type I – Otherwise known as normal Portland cement, Type I is a common-purpose cement for general construction uses, including pavements, concrete buildings, floors, precast concrete products and others uses. Type I/II – Our Type I/II Portland cement meets the requirements of both Type I and Type II, including strength and composition requirements, and can be used in projects where either type is required. More cost-effective than storing both types, Type I/II can be used on most concrete construction projects, including those that expose the concrete to harsh environmental conditions. Type III – Ground finer with a quicker reaction than Type I, concrete made with Type III has a high early strength rate. It has a higher 28-day strength than Type I, achieving approximately 70 percent of that strength after three days. Download Safety & Test Data: Safety Data Sheet Mill Test – Type I Mill Test – Type I/II Mill Test – Type III Mill Test – Type V Our Process After producing cement for more than 110 years, we’ve perfected the consistency and quality of our products. However, we’re always working to implement new technology-driven efficiencies to ensure we never stop improving. Our Process CONTACT US The Monarch Cement Company 449 1200 Street Humboldt, KS 66748 (620) 473-2222 info@monarchcement.com QUICK LINKS ABOUT US HUMAN RESOURCES PORTLAND CEMENT SDS MASONRY CEMENT SDS CONTACT SEARCH Map Data Terms of Use Copyright All Rights Reserved © 2019