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School of Engineering and Computer Science
University of the Pacific
3601 Pacific Avenue
Stockton, CA 95211

Research and Labs

Sialite Technology has allowed for the development of a new generation of ecological construction material that primarily uses waste products. We work with industries to put their waste products to use, which provides both parties with economic benefit. Allowing for the reduction in cost of waste disposal for companies and allowing us to gain materials to use in our product, and also being environmentally conscientious. It is developed based on an understanding of natural rock formation.


  • Sialite Technology was pioneered by Dr. Henghu Sun, a distinguished professor of engineering and internationally renowned scientist. Depending upon the production process, a metric ton of cement generates about .75-.95 tons of CO2 and other pollutants such as: NOX, SOX, VOC, PM10 and PM2.5. Sialite Technology markedly eliminates or reduces all of these emissions. This process also reduces energy consumption during the production process considerably.

  • Sialite is a new kind of silica-alumina-based cementious material, which was developed based on earth science, by simulation of the earth's natural diagensis process. This material is produced by way of clean, crystallic dualization preparation technology. This new material consists of silica-alumina material (the richest material on earth), combined with rock forming liquid comprising of a variety of minerals.

  • Conventional cement production requires not only a considerable amount of energy, but also emits significant amounts of greenhouse gases, and uses limestone (which is an increasingly rare resource) as its primary input. Sialite can utilize industrial solid wastes as its main raw material (such as tailing, slag, fly ash, waste bricks, etc.) which can constitute up to 95% of the materials mass.

  • Conventional cement is comprised primarily of a calcium-based system which causes it to be naturally less durable and stable than silica-alumina based materials. Sialite not only uses considerably more abundant sources of materials without generating greenhouse gases, other pollutants and excessive energy use, it has higher performance quality and characteristics than conventional cement.


Backfill has allowed for the development of a more enduring and economical solution to make underground mining a sustainable venture now and in the future. The following problems motivate this research:

  • Solid wastes are left after product production and are occupying land, there are also issues with self-combustion and leaching.

  • Only half or even less of resources can be mined out

  • Potential collapse of mining surrounding rock, which can lead to flooding, fire, explosion, etc.


PRRC lab was established with the in-kind support from University of the Pacific and investment from industrial partners. Our lab covers over 3,500 square feet, and is fully equipped with multiple facilities and apparatuses for cement and concrete research. It has an estimated worth of more than $250,000.