In the Poraver® Customer Service Center the effects of different aggregates in the formulation of the waterproofing slurries were tested. Special attention was paid to the crack bridging properties of different Poraver® grains in comparison with conventional products (sand) according to DIN EN 14891. Furthermore, the ratio of cement to polymer in the formulation was varied.
The test series have shown that the crack bridging according to DIN EN 14891 is clearly positively influenced by Poraver®. The use of Poraver® 0.1-0.3 mm enables an improvement of up to 87 % in a cement-rich system and up to 59 % in a polymer-rich system with no change in the volume-based formulation. Due to their grain shape, the round embedded grains contribute to a change in load transfer compared to angular fine sands and reduce stress peaks. The significant reduction of the Young‘s modulus at similar strengths makes the product even more malleable. As expected, this effect is higher in less flexible, cement-rich systems.
By replacing a volume fraction of conventional aggregates such as sand with Poraver®, the handling of bagged goods is made considerably easier through weight savings. The product supplemented with Poraver® is also much more economical. By using Poraver® 0.25 - 0.5 mm, for example, a 25 % higher yield is possible compared to a sealing slurry without Poraver® expanded glass. This means that the bag weight can be reduced by 20 % for the same area output, e.g. from 25 kg to 20 kg.
In summary, the use of Poraver® expanded glass offers the following specific advantages:
Higher product yield
Simplified application and easier processing
Significantly improved crack bridging
We have summarized these and all other relevant results for you in a new application sheet, which we can now present to you.
Waterproofing slurries are required for the sealing of new buildings or for subsequent renovation measures on old buildings, both inside and outside. These are used wherever a barrier against water penetration is required.
Waterproofing slurries can be used in the following applications:
Sealing of building components which are in contact with the ground
Horizontal barrier against ascending humidity
Protection against spray water in basement areas
Intermediate sealing for humid building components
Waterproofing against temporary moisture from inside during the construction phase
Sealing before tiling of terraces and balconies
In the bathroom / showers
Typically, the sealing slurry is applied directly to the substrate to be sealed. This means that it can easily be applied to masonry, concrete, render or natural stone.
For further information regarding the test results of our test series we recommend our new application sheet "Waterproofing slurries with Poraver®". You can download the PDF document here.
We would be pleased to provide you with our guide formulations on request. For faster processing of your request, please fill out the contact form below. We look forward to your inquiry.