Low Porosity


Calderys invented and patented Low Cement Castable (LCC) technology. Furthermore, we have developed a large family of these products for all industries as they present very impressive mechanical characteristics and can compete with bricks.

In addition to regular gunning castables, Calderys continued to innovate by inventing a new gunning installation technique for LCC with specific formulations and gunning machines—both patented. Using the same amount of mixing water as traditionally vibrated LCCs, these gunning mixes, named "Low Porosity Dense Gunning (LPGM)," have mechanical properties matching their corresponding LCCs; exceptional Cold Crushing Strength and abrasion resistance, very good deformation under load values, great thermal shock resistance, and excellent corrosion resistance. In addition to these characteristics, LPGMs have proven to offer a service life comparable to that of cast-vibrated LCCs.

Calderys, with its specific lances for gunning machines, has demonstrated that installation efficiency on jobsites is approximately 50% greater when using LPGMs compared to brick linings.

Gunning - Low Porosity1
Gunning - Low Porosity 1
Gunning - Low Porosity 2
Gunning - Low Porosity 2

A full range has been developed to meet the needs of various markets:

In order to meet the increasing productivity needs of our customers, Calderys has continued to innovate and develop LPGMs for over 20 years. This has resulted in the following upgrades:

  • High abrasion resistance for cement and power plants with products like the CALDE™ GUN LB 84
  • Very high alkali resistance for incineration, cement, and blast furnaces when gunning with CALDE™ GUN LA 50 SZ
  • Slag resistance for the runners, with additions of SIC and carbon, as found in our CALDE™ GUN G LA 65S5 product
  • Slag line resistant refractories for the steel industry with spinel forming products such as CALDE™ GUN LT 95 SP

Calderys now collaborates with the end-users to install Low Porosity Dense Gunning Mixes for maintenance, which decreases the stoppage duration on turnkey projects in cement plants, fired coal power plants, blast furnace revamping, and full contract runners.

If you want to know more, please contact our Expert!

About Calderys

Our mission is to help you meet your ever increasing production and productivity targets, whilst protecting the safety of your people and the integrity of your equipment. Our focus is to deliver safe, reliable and high performing refractory solutions customized to your needs. Our international production and sales facilities allow us to develop and deliver customized solutions based on monolithic and ready shape monolithic refractory materials worldwide in a fast, efficient, and safe manner.



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