Soil and voids beneath a structure
Stabilisation, void filling and sinkhole remediation after assessing their extent and cause.
SOIL AND FOUNDATIONS
GeoPolymer.350
Two-component PU system for strengthening and filling soil and rock zones, with the option of controlled structural lifting using a selected method.
| Product / pump | Two-component PU foam system; 2K pump |
|---|---|
| A : B ratio | 100 : 100 by volume; 100 : 122 by weight |
| Mixture viscosity | 400 ± 100 mPa·s at 23°C |
| Free-rise foam density | 350 kg/m³ — laboratory value |
| Start / gelation at 23°C | 40 s / 50–120 s |
Technical data
Read values together with the temperature, material state and test conditions.
| Viscosity of A / B / mixture at 23°C | 500 ± 100 / 330 ± 100 / 400 ± 100 mPa·s |
|---|---|
| Density of A / B / mixture at 23°C | Approximately 1.01 / 1.23 / 1.10 g/cm³ |
| Foam expansion ratio v/v | 1–2.5 according to the TDS; laboratory value |
| Free-rise foam density | 350 kg/m³ |
| Times at 23°C | Start 40 s; gelation 50–120 s; tack-free 120 s |
| Preparing component temperatures | Both components +10 to +30°C before delivery |
The TDS states that results depend on foaming conditions. Expansion ratio and free-rise density do not predict consumption or density in soil. Rapid strength development does not determine when a repaired foundation can be loaded.
- Storage and shelf life
- +10 to +25°C; 6 months in tightly sealed, original containers, protected from moisture and sunlight.
Applications and selection criteria
First establish the repair objective, substrate condition, presence of water and joint movement.
Controlled lifting
Levelling structures requires selection of stages and monitoring of displacement. Separate the lifting task from confirmation of ground parameters.
Excavations and fractured rock
The TDS covers sealing and strengthening dry and wet zones. Actual flow paths and the ability to retain the material determine the delivery method.
Application conditions and limitations
Selection requires assessment of soil, water, voids and loads. Resin specimen parameters are not the capacity of the strengthened soil. Confirm injection extent, quantity and effect through a trial and the adopted monitoring programme; a pressure increase alone does not confirm completion.
How the material behaves
The TDS covers dry and wet zones; the influence of water requires a trial. Lifting movement is monitored by measurement; there is no universal lift height.
1. 2K delivery
A and B at a 1 : 1 ratio by volume
2. Combining
Reaction and foaming
3. Monitoring
Quantity, displacement and condition of the strengthened zone
Preparation and application
Work sequence after assessing the structure and selecting the method. Full requirements are given in the product instructions.
Assess the zone and plan monitoring
Establish soil layers, voids, water and adjacent elements. Plan injection points, sequence and stop criteria. Monitor structural displacement during lifting.
Prepare the components and system
Before application, bring both components to +10 to +30°C. Connect separate circuits to the 2K pump, check the 1:1 volume ratio and operation of the mixing head.
Perform a trial and inject in stages
Start with a trial section. Record quantity, pressure, flow and the response of the structure. Select settings for the soil and objective; do not derive pressure from material strength.
Check the result and clean the equipment
Compare the result with the task criteria. Flush and maintain the system according to the product and equipment instructions; the A + B reaction starts when they are combined.
Clean the 2K resin system with PI-CLEANER before the material sets, then maintain with PI-SAVER according to the product instructions.
From selection to application
Choose the instructions for your task and calculate material quantities using clearly defined assumptions.
Product documentation
Data, application instructions and safety documents for the supplied material.
Preparing for safe work
Before use, read the current documentation for all supplied components. Select protective equipment, ventilation and cleaning methods appropriate to the material and equipment.
Discuss your project conditions
Prepare a description of the substrate, water, geometry and expected result. Let us select the material and delivery method.