DE3024825A1 - Concrete mortar drying and mixing procedure - includes adding fine white calcined chalk to cement mixt. to absorb moisture before final mixing - Google Patents

Abstract

The method of drying the ingredients of a mixture for making concrete mortar includes first mixing them with a stoichiometric quantity of calcined chalk. This extracts moisture from the sand and cement powder, and heat is generated during transformation to calcium hydrate so that time and energy is saved in the treatment. The chalk is ground, and is in the form of fine white powdered chalk and is added to the ingredients before the final mixing operation.

Description

Method for drying the mixed components of drying

mortar

The invention relates to a method for drying one or more mixed ingredients in the production of Dry mortar, especially for drying the added sand.

So far, the components of dry mortar and in particular the added sand are in a costly manner with heat and air dried in appropriate drying facilities. The drying of these ingredients is important for the Dry mortar can be stored.

The invention is based on the object of creating a Trockenverfah Ren, with which the equipment and the energy expenditure can be reduced.

The solution to this problem is that the material to be dried with a largely stoichiometric amount of quick lime is mixed. Quick lime tends to absorb moisture in order to turn into hydrated lime and heat is also released. So there is even the possibility of a slightly below stoichiometric To add proportion lying amount of lime, because the heat released for an additional evaporation and Drying can provide. Apart from thorough mixing of the components, no further measures are required.

Mr / H

130064/0195

/ 2

so that expensive drying facilities with a corresponding expenditure of energy can be avoided. It is already known to use the properties of quick lime for drying foodstuffs, damp rooms, etc. ". Im In the present case, however, this drying has the additional advantage that the dry mortar is more desirable or even if necessary, it also contains a certain amount of lime. So it becomes an additional effect achieved in that the addition of lime conducive to such a dry mortar practically at the same time beforehand can already be used to carry out the drying process. In addition, this can be added to the mix afterwards contained slaked lime, the addition of stone dust can be reduced or avoided.

It is particularly useful if ground quick lime, preferably white fine lime, is used for drying. The quick lime can first be added to the aggregate to be dried in the later mixture. He but can also be mixed in during the preparation of the dry mortar mixture itself. This is especially true when the added sand or any other aggregate to be dried brings relatively little moisture with it. Are these If the constituents are very moist, the quick lime is expediently used for these constituents before they are mixed Formation of dry mortar added.

The surface moisture of gravel can also be used of the method according to the invention can be eliminated.

All features and construction details shown in the description, the claims and the drawing can be used as well individually as well as in any combination with one another are of essential importance.

Parentanwa

130064/0195

Claims (3)

Expectations 1. Process for drying one or more mixed ingredients in the production of dry mortar, in particular for drying the added sand, characterized in that the material to be dried with a largely stoichiometric Lot of quick lime mixed wildly. 2. The method according to claim 1, characterized in that ground, quicklime for drying, preferably Fine white lime is used. 3. The method according to claim 1 or 2, characterized in that the quick lime is first to be dried Mixture component of the later mixture is added. A. The method according to claim 1 or 2, characterized in that the quick lime in the manufacture of Dry mortar mixture is mixed in itself. - Description - 130064/0195 ORIGINAL INSPECTED