Non-explosive demolition agent

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Minimum order quantity5 kg - one bag

General description of non-explosive demolition agent

A non-explosive expansion demolition agent is a powdery substance that, when mixed with water and poured into pre-drilled holes, causes the demolition (expansion) of stone, living rock, concrete, or reinforced concrete by its expansion. It is also used for quarrying marble and granite in quarries, digging canals and shafts in rock for water supply networks, and other installations, excavation of tunnels, demolition of foundations, leveling of road cuts, in mines, inside buildings, railway and road infrastructure, where classically blasting is not allowed due to excessive vibrations (vibrations) and when destroying the remains of demolished buildings after blasting. Underwater use is also possible. The demolition agent is tensioned with a force greater than 800 kg / cm2 (80 MP) upon reaction with water in the well. As a result, a similar effect occurs as with conventional explosive blasting (TNT). The stretcher is a substance that is more environmentally friendly, as its action does not cause vibrations, dust, noise or the flight of stray dangerous debris into the air as we are used to in conventional blasting. It also does not pollute the environment as it does not emit dangerous fumes during or before operation, and the substance itself does not constitute a substance harmful to the environment. Due to its simple and non-hazardous operation, the use does not require special permits and control or use of the substance, exclusively by mining-trained personnel.

The powdered substance of the non-explosive expanding agent consists of inorganic mixtures of calcium, silicon, iron and aluminum. The cold blasting agent is enclosed in moisture-resistant boxes with a total weight of 20 kg. The boxes contain 4 plastic bags with a stretching agent. Each of them weighs 5 kg. It is recommended to store the product in a dry environment for up to 1 year. Prolonged storage is not recommended as the product cannot be provided with a humid environment for proper storage.

An electric or pneumatic drill can be used to drill the wells. The size, depth and layout of the wells are arranged according to the type of material, the location of the demolition material, and the desired method of demolition. A non-explosive demolition agent requires the addition of pure water in a ratio of 30% water to the total weight of the powdered expansion agent added. Pour the required amount of clean water (1.5 liters of water for each 5 kg bag of expansion medium) into the container, then carefully add the powder and mix until the mixture becomes smooth and lump-free, similar to a thin mortar. The mortar must be poured into the holes within five to ten minutes, otherwise it becomes poorly liquid. Pouring into vertical and dry holes (holes) is easy. Problems can arise when wells are not completely dry and contain water. As a result, mortar may spill out of the well, which is prevented by covering the hole with a soft sponge and not with an object that would completely clog the hole. In case of rain, cover the wells with a waterproof coating. After pouring into the hole, the expansion medium breaks the rock or concrete in two to eight hours. The rate of demolition depends on the hardness of the rock, or. concrete and from the temperature of the environment in which it operates.

After pouring a non-explosive demolition agent into boreholes into stone or concrete, the expansion pressure increases sharply in relation to the elapsed time. After five hours at room temperature, it reaches a tensile (expansion) pressure of 50 MPa, which is equivalent to a pressure of 6000 tons per square meter. During the formation of the pressure of the non-explosive expanding agent, small cracks appear on the material intended for demolition. After the extra time has elapsed, these cracks coalesce into longer hairy cracks that coalesce according to the direction of successively drilled holes. With the appropriate sequential drilling, depth and slope of the wells, it is therefore possible to control the direction of fracture. Finally, the hairline cracks widen to a certain few centimeters in width, which distinguishes a non-explosive stretching means from conventional blasting, as rock can be thrown there for several meters. Two to four cracks are usually pulled from a single well, spreading on all sides, towards a free surface where the material can be pushed away.

The expansion agent is a highly alkaline substance, but it is not toxic. After mixing with water, it reaches a level of 13 on the pH scale, which can cause very strong irritation of the mucous membranes and eyes upon contact. In case of skin contact with liquid mortar, rinse the contact area immediately with a large amount of cold water. In case of contact with eyes, rinse immediately with plenty of cold water, but do not rub. Seek medical attention. Protective goggles, rubber protective gloves and a helmet are required for carrying, mixing and casting. In poorly ventilated areas such as tunnels and mines, the use of dust masks is required. After filling the wells with liquid mortar, do not bring your face closer to the wells for at least three hours after the casting is completed. After casting is complete, make sure the site is inadequately secured and prevent accidental visitors or workers from being in the immediate vicinity of the wells.

Table 1: Method of drilling wells for casting non-explosive demolition
  Mere vrtin
Substance and method of use Well diameter Distance between wells Depth of well
Breaking soft stone 28 - 38 mm 200 - 300 mm 105% of the total breaking height
Breaking hard stone 30 - 40 mm 200 - 300 mm 105% of the total breaking height
Stone cutting 28 - 38 mm 200 - 400 mm 90% of the total cutting height
Demolition of unreinforced concrete 30 - 40 mm 300 - 500 mm 80% of the total demolition height
Demolition of reinforced concrete 35 -40 mm 150 - 300 mm 90% of the total demolition height



Table 2: Amount of expansion medium used on every running meter of the well
Bore diameter (mm) Ø 30 32 34 36 38 40 42 44 46 48 50
Quantity of non-explosive expansion medium (kg / m) 1,2 1,3 1,5 1,7 1,9 2,1 2,3 2,5 2,8 3,0 3,2





Table 3: Amount of tensile material used per 1 m³ of demolition material

Substance intended for demolition
Standardized quantity of non - explosive expansion medium used per 1 m³ of substances intended for demolition

Stone
Soft stone 5 - 8 kg
Medium hard stone 8 - 12 kg
Hard stone 12 -20 kg


Concrete
Unreinforced concrete 12 -20 kg

Reinforced concrete
Reinforced concrete with less presence of steel reinforcement 10 - 25 kg
Reinforced concrete with a greater presence of steel reinforcement 20 - 35 kg
Brick     10 - 25 kg








Technical details: Non-explosive demolition agent

Minimum order quantity:
5 kg - one bag
Ambient temperature during use:
From 10ºC to 25ºC (Temperature inside the hole)
Consumption:
For demolition of living rock usually 5 kg per 1 m³. For crushing living rock and demolishing reinforced concrete two to four times more
Tensile (expansion) stress in a well on a substance intended for demolition:
Up to 50 MPa or up to 6000 t / m² after 5 hours of operation
Time required to develop the maximum operating power of a non-explosive demolition tensile device:
About 3 to 4 days. Also less than three days and more than four days, depending on the humidity of the poured mixture, the ambient temperature and the strength of the degrading substance.
Weight and packaging:
20 kg box with four moisture-resistant bags, each containing 5 kg of non-explosive demolition
Ordering:
When ordering, please indicate the amount of expansion medium you want to take. Order quantity interval is one bag (5 kg)
Dobra rešitev za nedostopna mesta, ki jih ne doseže bager.
Namesto mineranja in posledično poškodovanja bližnje hiše je bila to edina sprejemljiva rešitev za dokončanje izkopa.
Ker nisem mogel z bagerjem razbiti skale (preblizu hiše in pretrda skala) je bila to edina možnost. Raztezno sredstvo je v treh dneh razrahljal skalo. Super resitev;)
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