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
Moulded parts from refractory lightweight concrete
Insulating concrete parts
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.
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