**3. Grouting equipment**

310 Polyurethane

Volume weight, 20

[mPas] 150-300 170-

Viscosity, 20 °C

Mixing ration A/B

Mixing ratio A/B

Volume weight of the

Temperature of the curing reaction max

Beginning of foaming

Volume weight, 20

[mPas] 150-300 170-

Viscosity, 20 °C

Mixing ratio A/B

Mixing ratio A/B

Volume weight of the

Temperature of the curing reaction max

Beginning of foaming

foam [kg/m3

[°C]

°C [kg/m3

[°C]

°C [kg/m3

**Type Geopur**® **082/1000 Geopur**® **082/600 Geopur**® **082/350 Geopur**® **082/290** 

] 1075 1235 1075 1235 1075 1235 1075 1235


do 132 do 132 do 132 do 132






**Component A B A B A B A B** 


weight. 100 126 100 126 100 126 100 126

volume. 100 100 100 100 100 100 100 100

Foaming factor\* 1 - 1,2 1,5 - 2 2 - 4 4 - 5

foam [kg/m3] 1000 ± 20 600 ± 20 360 ± 20 290 ± 20

at 20 °C [sec] 120 ± 2 120 ± 2 120 ± 2 120 ± 2


weight. 100 126 100 126 100 126 100 126

volume. 100 100 100 100 100 100 100 100

] 180 ± 20 90 ± 20 90 ± 30 35 ± 3

do 132 do 132 do 140 do 132

Foaming factor 5 - 6 9 - 11 10 - 15 až 40

at 20 °C [sec] 120 ± 2 120 ± 2 120 ± 12 120 ± 3

**Table 1.** Technical data of the grouting system Geopur® produced by the company GME

**Type Geopur**® **082/180 Geopur**® **082/90 Geopur**® **230 Geopur**® **240 Component A B A B A B A B** 

] 1075 1235 1075 1235 1090 1235 1075 1235

Injection of grouting material into the rock massive is performed by grouting pumps. Usually piston type pumps with electric or pneumatic drive are used. There are one component and two component pumps available. An example of a grouting pump is presented on Fig. 1 below.

**Figure 1.** Two component electric grouting pump DV 97.

Grouting elements are used during the injection of the grouting material into the rock mass. These are technically designed to transfer the pressure of the grouting material, preventing back flow of the material out from the borehole. They are usually equipped with a back valve. According to the method of fastening in the borehole, we distinguish mechanically fastened once, hydraulically, drilled, pushed in, vibrated or glued. They are called grouting packers, grouting anchors or bolts, grouting tubes and etc.
