Pozzolan in History

The historical use of natural pozzolan as building construction material dates back to ancient times. Scientists have proven that the ancient Greeks began to use natural Pozzolan-Lime mixtures to build water-storage tanks sometime around 700 BC.

The technique was then passed to the Romans about 150 BC. The cements made by the Greeks and the Romans were of superior durability, because neither waves could break, nor water dissolve the concrete.

Natural materials are extensively used in USA, Africa, Europe and certain countries of Asia including India and Iran. Due to the limited supply of high quality natural Pozzolan, in the last 30 years, the USA and European countries were compelled to lower their quality criteria so that waste materials such fly ash, burnt lime, blast furnace slag etc.; could be used as substitute.

Major Pozzolan Concrete Projects in USA

• California Auburn Dam
• Palo Verde Nuclear Power Plant, Arizona
• Sacramento Wastewater Treatment Plant, California
• Southern Nevada Water Project
• Tehama-Colusa Canal, California
• Port of Richmond
• Pacheco Pass Tunnel, California
• Idaho Falls Hydro Electric, Idaho
• American River Falls Power Plant, Idaho
• Coyote Power Generating Plant, North Dakota
• San Francisco Waste-water Treatment Plant
• Chabot Dam, California
• Dumbarton Bridge, California
• Rock Springs Wyoming Power Plant, Wyoming
• North Point Seawall, California
• Bechtel Engineering Center, UC Berkeley
• Redding Airport Runway, Redding
• Los Angeles Flood Control District