CS254229B1 - Electric conductive mortar for electroosmotic installation - Google Patents

Abstract

The solution concerns an electroconductive mortar, which can be suitably used in the establishment of an electroosmotic installation. The essence of the solution is that the electroconductive mortar for an electroosmotic installation consists of 12 to 16 wt. % petroleum coke with a maximum grain size of 60 μm, 12 to 16 wt. % Portland cement, 60 to 64 wt. % silica sand with a maximum grain size of 1 mm and 12 to 16 wt. % water, whereby wt. % are based on the total weight of the mixture.

Description

The invention relates to an electroconductive mortar.

Electro-scmosis is one of the methods based on electro-climatic phenomena and is used in the rehabilitation of damp walls of buildings. Previously known embodiments of electroosmosis installations are designed by placing metal electrodes in the wet wall, which interconnect to form a positive electrical circuit in the wall. In passive electro-osmosis, this circuit is switched to ground. On the 50 m ^{2 of the} cross-sectional area of the wall, one earthing is made of the same metal as the positive electrical circuit. In the case of active electroosmosis, a low-voltage direct current source is included in the system. The wiring is converted so that the positive pole of the power supply is connected to the positive electrical circuit of the wall and the negative pole to the ground.

Of the various material variants of electroosmosis, circuits made of media have proven their best. Because the electrode and jumper wire cross-sections are relatively large, the entire installation requires a considerable amount of this precious non-ferrous metal. Especially electro-osmosis mortars were not produced.

The desired remediation effect can be achieved if the cross-sections of the electrodes as well as the interconnecting conductors are substantially smaller, but they are coated with the electrically conductive mortar according to the invention, which consists of 12 to 16% by weight. petroleum coke with a maximum grain size of 60, tzm, 12 to 16 wt. % Portland cement, 60 to 64 wt. quartz sand with a maximum grain size of 1 mm and 12 to 16 percent by weight. % by weight of water; are based on the total weight of the mixture.

In particular, the advantages of the subject invention are that a relatively large portion of the medium that would be consumed in an electroosmotic installation has been replaced by a relatively fast mortar. The same effect is achieved in the renovation of wet walls of buildings by electro-osmosis as in the case of using only copper circuits. The saving of media also applies to a grounding rod which is only copper-plated.

Example

A mortar of 1 dm ³ was produced, consisting of 0.3 kg ground PK 5/60 petroleum coke with a max. a grain size of 60 microns (petroleum coke according to CSN 65 6429 is produced by cracking or pyrolysis of oil distillation residues and is a basic raw material for the production of carbonaceous materials); 0.3 kg Portland cement 350; 0.3 L of water; 1,02 dm ^{3 of} quartz sand with a maximum grain diameter of 1 mm.

The electrical conductivity of this mortar was tested on cakes 10 cm in diameter and 1 cm high (similar to those used to test cementitious bulk stability).

cm 213 V, cm 206 V, cm 197 V, cm 191 V, cm 184 V, cm 176 V, cm 170 V, cm 161 V, cm 155 V, cm 145 V.

This mortar can be used in the construction industry for the rehabilitation of damp objects if electro-scosion is used.

Claims (1)

PREDMET Electric conductive mortar for electroosmotic installation, characterized in that it consists of 12 to 16 wt. % of kerosene coke with a maximum grain size of 60 μϊη, 12 to 16 wt. Portland cement, 60 to 64% by weight; silica sand with a maximum grain size of 1 mm and 12 to 16 wt. water.