1 Chemical components of PROSTAR

PROSTAR is a power product consisting of an inorganic material mainly made of a special kind of silicate and an organic compound, PROSTAR contains no harmful components 

2 Some effects on the expansive stress of PROSTAR

1) the expansive stress increases more than 30n/mm2 (Fig.1 &Fig2) genially the compressive fracture stress of rock is 100 to 200 n/mm2 and that of concrete is 15 to 50 n/mm2, however the tensile fracture stress is very small for instance it ranges from 4 to 7 stress is very small for instance it ranges from 4 to 7 n/mm2 in rock and 1.5 to 3 n/mm2 in concrete. Since demon with PROSTAR is based on a fracture due to a tensile stress all kinds of rock and concrete can be cracked and broken with PROSTAR when appropriate holes are properly drilled

2) the larger the hole diameter is the greater the expansive stress becomes (Fig3)

3) there is little change in the expansive stress when the water ratio is in the neighborhood of approximately 30% however the stress is decreased as the water ratio is increased or decreased

4) The expansive stress along the hole depth is almost constant except for that near the entrance of holes

Generally the expansive loss from the hole entrance has little effect on the demolition work when the hole depth is enough

5) when PROSTAR is properly used within the parameters as noted in the conditions no spurt due to heat generation (blown-out shot)occurs because of the PROSTAR strong adhesion and fictional resistance to the upper surface of the hole

Fig.1:Changes in the expansive stress of Prostar-1

 

Fig.2:Changes in the expansive stree of

Prostar-2

Fig.3: The relation between the expansive stress and hole diameter