Hydraulic cement compositions, ingredients, and methods of making same. United States Patent 2868659. US Patent References: Cement composition - - 2229311...
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www.freepatentsonline.com/2868659.html
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In the case of hydraulic cement the mechanical strength is a function of the water : cement ratio as well as of the cement : sand ratio, and when any of said ratios is changed, the results between the different measurement methods are not comparable. The addition of the previously mentioned ingredients can, of course,
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www.freepatentsonline.com/EP0812811.html
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Although the ancient Romans developed a cement that could harden under water (called hydraulic cement), there was little information in modern times on how to produce such a cement They are usually complex proprietary formulations containing Portland clinker and a number of other ingredients that may include limestone,
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www.answers.com/topic/cement
www.answers.com/topic/cement
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In 1824, Joseph Aspdin, a British stone mason, obtained a patent for a cement he produced in his kitchen. The inventor heated a mixture of finely ground limestone and clay in his kitchen stove and ground the mixture into a powder create a hydraulic cement-one that hardens with the addition of water.
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www.cement.org/basics/concretebasics_history.asp
www.cement.org/basics/concretebasics_history.asp
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Materials that contain appropriate amounts of calcium compounds, silica, alumina and iron oxide are crushed and screened and placed in a rotating cement kiln. Ingredients used in this process are typically materials such as limestone, marl, shale, iron ore, clay, and fly ash.
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www.cement.org/basics/concretebasics_faqs.asp
www.cement.org/basics/concretebasics_faqs.asp
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The Portland Cement Association is concerned with contributing to a better environment, in improving the concrete product and its uses, and in raising the quality Portland cement is a hydraulic cement which means that it sets and hardens due to a chemical reaction with water. Consequently, it will harden under water.
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www.concretenetwork.com/concrete/faq.htm
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One common application for special hydraulic cement blends is repairing cracks and leaks. Certain types of cement contain an ingredient which causes the...
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www.wisegeek.com/what-is-hydraulic-cement.htm
www.wisegeek.com/what-is-hydraulic-cement.htm
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Nov 23, 2009 Hydraulic cement contains several ingredients that are not present in the ordinary Portland cement. These compounds are added to facilitate...
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www.brighthub.com/engineering/civil/articles/56976.aspx
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This invention relates to additive compositions, otherwise known as air-entraining admixtures, for incorporation in hydraulic cement mixes, such as concretes and mortars, but not limited thereto, for the purpose of increasing the durability of such mixes, after hardening, to cycles of freezing and thawing under...
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www.wipo.int/pctdb/en/wo.jsp?wo=1985001500&IA=WO1985001...
www.wipo.int/pctdb/en/wo.jsp?wo=1985001500&IA=WO1985001500&DISPLAY=DESC
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