parallax background
Refractory materials
Young’s modulus in dry mortar
7. June 2017
13,400 m² expanded glass acoustic ceiling for the Louvre Abu Dhabi
17. January 2019

Refractory materials with Poraver®

Improved thermal insulating properties and processing 

For economical production with high-temperature processes, it is necessary to minimise energy loss within the scope of energy management by means of suitable insulation measures. Poraver® expanded glass granules are characterised by their low density, high strength, round grain shape and thermal insulation properties. Poraver® is worldwide established as a lightweight aggregate for dry mortar, lightweight concrete, panels, insulating fills and special applications.


Poraver® is an excellent lightweight aggregate and filler for a wide variety of refractory products and can be used similar to vermiculite or expanded shale respectively clay (ESCS - Expanded Shale, Clay and Slate). 

Unshaped (monolithic) products

  • Heat resistant lightweight concrete

  • Insulating mortar

  • Backfills

  • Gunning mixes

  • Ramming mixes

  • Insulating fills

Shaped products  

  • Moulded parts from refractory lightweight concrete

  • Insulating concrete parts

  • Insulating panels

Poraver® Advantages

  • 7 different grain sizes from 0.04 mm to 4 mm allow the composition of a sieve line with a dense structure

  • The density can be specifically adjusted by selecting different grain sizes and very good thermal insulation properties can be achieved

  • The spherical shape, low weight and high compressive strength of the Poraver® grain make it easy and safe to process the mixes

  • Compared to many other lightweight fillers, Poraver® offers low water absorption, which reduces the water requirement of the mixture and therefore achieves high strength

  • Poraver® offers a constant material quality and chemical composition - ensuring consistent quality of the finished products


In the following trials Poraver® was tested in hydraulically hardening, unshaped (monolithic) and insulating refractory lightweight concretes. The material properties were tested on a pourable mixture for a firing at 1,000 °C.


The measurements on the tested system clearly show that the technological properties of the product are within the desired range even after the firing at 1,000° C. The flexural strength of the mortar, after firing, corresponds almost to the value of the initial test and the compressive strength is approximately 1/3 lower than before the test. The remaining longitudinal shrinkage of the system of -0.8 % is within the acceptable range.

Guide formulation for lightweight refractory concrete as PDF

Request our guide formulation for refractory concrete without obligation. Simply fill in the following form. We will send you the information immediately by e-mail. Please fill in the fields marked with * for faster processing. Thank you very much.


    We send our customers information material on our products and applications at irregular intervals for our own advertising purposes. If you would like to benefit from this in the future, please confirm this by ticking the box below. Your data will not be passed on to third parties in accordance with the data protection declaration. You can of course object to this consent at any time.

    Please fill out the fields marked with * for faster processing. This will help us to process your request quickly. Your details will be saved to respond to your request electronically. For further inquiries we only save your data internally for purposes of customer care. If you do not agree, please let us know. Thank you.