LU83443A1 - NOVEL BRICK POWDER AND ITS APPLICATION AND METHOD OF USE AS AN EXPLOSIVE - Google Patents

Description

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The present invention relates to a new brick powder and its application and method of use as an explosive.

To avoid any ambiguity, it should be clarified that in the present specification the term "explosive" intends to designate in a general manner, any combination capable of producing a burst * a separation, a splitting, a tear, a deformation, a compression * loosening, destruction, etc.

The currently known explosives act by the very high pressures they develop. Their disadvantage is that these pressures are reached in a very short time and that * therefore their use is accompanied by unpleasant secondary phenomena * notably * variations in local pressure, detonations, etc.

The object of the present invention is to provide a material which offers the possibility, when used judiciously, of producing a slowed or delayed explosion effect and of obtaining a permanent expansion which remains, even after the return to normal conditions * unlike, for example, thermal expansions which, in general, are reversible phenomena as a function of the coefficient of expansion of the material considered and of the temperature.

A brick powder of this kind which satisfies the above conditions is characterized in that it comprises, by weight Z:

Si 2-9 Al 2-0.3 Fe 1-0.2 25 Ca 50-65

Mg 0.3-0.5 S 2.5-0.1 0 25-40 with 1 to 2 Z of red loss.

According to the invention, this new material can be used as a slow-effect explosive and makes it possible to avoid the unpleasant secondary phenomena which accompany sudden increases in pressure and, in particular, detonations; indeed, according to the invention, an addition of water of between 20 and 50% by weight to the powder and the introduction of the resulting mixture into, at least, one opening of the object which it is desired to burst. or explode, makes it possible to obtain, in a time comprised between thirty minutes and approximately seventy hours, depending on the ambient temperature or filling of the opening, a burst and a slow destruction of the ohj.er.lt. tca & tUêv 2> · The invention makes it possible to obtain expansion pressures exceeding 2,300 tonnes / m.

Tests have shown that it is advantageous to use the powder of the invention having the following compositions: 5 _________%? "If Al Fe Ca Mg S 0 Loss * U Total poxds ° red VVV 5V ° i4 li6 32i ° V "i7, 0 6.3 0.6 0.3 58.5 0.4 0.3 31.9 1.5 99.8

Another possibility is to use a brick material having the following composition: 15 Z m Si Al Fe Ca Mg S 0 in Total red weight 4.0 1.2 0.7 58.6 0.4 1.6 32.0 1.2 99.7 20________

Conclusive results have also been obtained with a brick material having the following composition: 25 I * “I Si I Al Fe I Ca MS ISI 0 I *“ ““ Total weight ^ red 6.3 0.6 0.3 0.3 58 , 5 0.4 0.3 31.9 1.5 99.8 30 i. It may be particularly advantageous for the proportion of added water to be between 25 and 40% by weight in order to develop corresponding expansion or expansion pressures.

Claims (6)

2. Brick powder according to claim 1, characterized in that its composition, in X by weight, is as follows; Z? "If Al Fe Ca Mg S 0 Total weight loss red ° 4.0 1.2 0.7 58.6 0.4 1.6 32.0 1.2 99.7 to to to to to to to to à à 20 6.3 0.6 0.3 58.5 0.4 0.3 31.9 1.5 99.8 3. Brick powder according to claim 2, characterized in that its composition, in X by weight, is as follows: 25 _________%? *} If Al Fe Ca Hg S 0 Total weight ° red 4.0 1.2 0.7 58.6 0.4 1.6 32.0 1.2. 99.7 30 4. Brick powder according to claim 2, characterized in that its composition, in X by weight, is as follows: 1? "If Al Fe Ca Mg S 0 Ϊ® ***“ Total red weight 35 __________ I 6, 3 0.6 0.3 58.5 ° * 4 0.3 31.9 1.5 99.8 _____________- ------ - '----------' --- ----- -1 - - -------- - i "................. 5. Application of the brick powder specified in any one of claims 1 to 4 as an explosive. 6. Method for producing a burst or an explosion, characterized in that it consists in using, as an explosive, the brick powder according to any one of claims 1 to 4, in mixture with 20 to 50. weight of H ^ O and to introduce the resulting mixture into noine 5 an opening of the object which one wants to explode or explode. 7. Method according to claim 6, characterized in that said brick powder is mixed with 25 to 40 X by weight of H ^ O. * "