When to Use Stone Cracking Powder for Small Businesses？
Questions You Should Know about Stone Cracking Powder for ...
Instructions for use
Drilling. Filling. Amazement.
With Betonamit, ANYONE can crush rock, stone or concrete in just 3 steps. Mix Betonamit powder with water and fill into the previously drilled holes. The material sets and begins to expand. Betonamit develops an expansion pressure of over 10,000 tons per square metre for cold blasting.
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3 steps to silent demolition.
The first step is to drill the holes. The drill hole diameter to be selected is 25-45mm (1″ – 1 3/4″). The maximum drill hole spacing is 10 times the drill hole diameter and therefore 25-45 cm (10″ – 18″). Smaller borehole spacings lead to even better results. The drill holes should be dry and as free of drilling dust as possible.
In the second step, add the Betonamit powder to the mixing container and loosen slightly with the agitator. Then add exactly 1.2 liters (40oz) of cold and clean water per 5kg (11lb) of concrete mix and mix intensively with an agitator for 2 minutes until a flowable and homogeneous mixture is obtained. The mixture appears relatively dry at first, but the consistency changes abruptly during the mixing process.
In the final step, fill the mixture directly from the mixing container into the drill holes. No additional mechanical closure is required. Dilute excess Betonamit mixture with plenty of water for deactivation and dispose of with the remaining construction waste. The total processing time should not exceed 5 minutes.
Now we just have to wait for the gentle blasting. The mixture hardens slowly in the borehole and sets. The expansion pressure then gradually begins to build up. The fracture time depends mainly on the temperature, the borehole diameter and the borehole spacing. Cracking always occurs in the direction of least resistance. A larger drill hole diameter means more force, shorter reaction time and wider crack formation. Smaller distances between the drill holes mean smaller fragments and a shorter reaction time. As a rule, small hairline cracks are already visible in some places after a few hours. These then continue to widen and new cracks appear. Don’t make the mistake of starting to remove the fragments too early. It is best to let the product work for as long as possible, because with every hour it becomes easier to clear away or remove the blasted object. With a little experience, the blast pattern and blasting time can be predicted very accurately and almost all blasting work can be carried out explosion-free.
Tip: BETONAMIT continues to expand over several days. This means that the more time you give the product, the easier it is to remove the fragments. Therefore, be patient and allow BETONAMIT to work for as long as possible to achieve the best result.
Please observe our safety regulations when handling Betonamit.
Working with BETONAMIT® is that simple.
How blasting works with BETONAMIT®
Project example
Demolition of concrete staircase
BETONAMIT is very often used to crush concrete stairs or other concrete staircases or concrete steps. For this purpose, the drill holes are drilled in the rear area of the concrete steps in order to achieve the most effective blasting over the entire surface. The more holes are drilled, the smaller the fragments are. If the concrete staircase is trapped by an external wall, for example, empty holes on the side can help to relieve pressure.
Project example
Crushing of boulders
Crushing boulders and other stones is one of the main applications of BETONAMIT. Here too, the fragment size is defined by the number of drill holes. The correct drill hole depth is important for this application, which should be at least ¾ of the total depth so that the stone tears through to the bottom and does not break out sideways.
Positioning the drill holes
Principle
Cracking always occurs in the direction of least resistance. A larger drill hole diameter means more force, shorter reaction time and wider crack formation. Smaller distances between the drill holes mean smaller fragments and a shorter reaction time.
Columns
The holes are drilled a short distance apart in a line. Cracking occurs from hole to hole. In this way, objects can be separated or split relatively precisely during blasting work. The drill hole depth should be at least ¾ of the total depth to ensure complete tear-through and prevent lateral break-out. Smaller stones or concrete elements can usually be split with a central drill hole.
Shredding
The holes are usually drilled in staggered rows in order to obtain the smallest possible fragments. The more drill holes, the smaller the fragments. The cracks form in a criss-cross pattern. Here too, larger boreholes generate a significantly higher expansion pressure, which leads to a better blasting result.
Ablation
If there is no free side to displace the material, space must first be created. The target level (Dt) is usually over-drilled by 5-15 cm (2″- 6″) to avoid subsequent caulking work as far as possible. The expansion pressure (F) always develops 90° to the borehole. With angled holes, it is therefore possible to create a free side where the pressure or material can escape, even in unfavorable situations. Ideally, all holes should be drilled first and filled at the same time so that they can work together.
Release
To loosen rock, the holes are drilled in several rows 10-15 cm (2″- 6″) below the required ground level (Dt) and backfilled. This breaks up and loosens the subsoil so that it can then be removed by excavator or, in some cases, by hand. Here too, the swelling explosive works most effectively when the holes are drilled at an angle so that part of the force (F) can act upwards. Several rows of holes can be filled with BETONAMIT® at the same time. Cracks will appear in the front row first. The next row is then pressed in.
Material consumption
The consumption per meter of borehole to be filled depends on the borehole diameter. To calculate the required amount of Betonamit, the sum of all boreholes in meters or feet is multiplied by the respective factor.
Examples
You have 10 drill holes (ø 40mm) with a depth of 0.3 meters
Factor for ø 40 mm: 2.2 kg (table)
10 holes x 0.3 m x 2.2 kg = 6.6 kg Betonamit
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You have 10 holes (ø 1 1/2″) with a depth of 5 feet
Factor for ø 1 1/2″: 1.34 lb (table)
10 holes x 5 feet x 1.34 lb = 67 lb Betonamit
technical specifications and reaction time
The following table shows the expected reaction time as a function of temperature. You will also find further helpful information on the application here. As the drill hole diameter has an enormous effect on the expansion force and reaction time, we recommend selecting the largest possible drill bit wherever possible.
safety regulations
- Wear safety goggles at all times when working with Betonamit.
- Only use Betonamit at an object temperature between 0°C and max. 35°C. (32-95°F)
- Protect the Betonamit powder from heat before use.
- Do not use hot water. (max. 20°C / 68°F)
- Observe the correct amount of water: 1.2 liters (40oz) per 5kg/11lb Betonamit / 0.6 liters (20oz) per 2.5kg(5.5lb) Betonamit
- Mix by machine (electric agitator) and not by hand. (Poor mixture increases the risk of blow-out)
- Only use drill bits with a diameter of 25-45 mm. (1″ – 1 3/4″)
- The minimum borehole depth corresponds to 5 times the borehole diameter.
- The maximum borehole depth depends on the situation, but is approx. 6 meters. (20ft.)
- The drill holes must be as clean and dry as possible.
- On hot days, fill the boreholes early in the morning.
- Pour the Betonamit into the drill holes immediately after mixing.
- Make sure that the expansion force cannot cause any unwanted damage.
- Dilute material residues with plenty of water and dispose of them in accordance with local regulations. (building rubble)
- Never look directly into the filled drill holes (risk of blow-out)
- Cordon off the workplace to prevent unauthorized access. (blow-out or loosening material)
- Do not pour the mixture into bottles or other closed containers. (explosive effect)
- Please also observe the hazard and safety instructions on the packaging. (GHS)
CAUTION: Failure to comply with the regulations, improper handling or excessively warm conditions may result in a blow-out. A blow-out is the sudden, explosive escape of concrete ammite from the borehole. If you are hit in the face by the material escaping at high pressure, this can lead to injuries and serious eye damage. Therefore, never look directly into the filled drill holes and always wear safety goggles when working with Betonamit. After a first blow-out has occurred, this is repeated about 3-6 times and can also occur in other boreholes. Close the work area to all persons for at least 3 hours.
Betonamite is non-toxic, but contains a large proportion of unslaked lime (calcium oxide).
- In case of contact with eyes: Rinse cautiously with water for several minutes. Remove any contact lenses if possible. Continue rinsing.
- In case of contact with skin: In case of allergic reactions, wash with soap and water and consult a doctor.
Yes. We encourage students to learn about quarry operations and geology. School officials and teachers can schedule a tour with us by calling our main office at (860) 963-. Please note that all individuals must complete a Waiver of Liability prior to touring the quarry and must observe all safety rules and procedures.
In order to produce aggregate (sand and stone) used in the construction of new roads, bridges, utility lines, etc., typically a large amount of earth and rock must be excavated. Blasting operations prepare the rock that cannot be removed by other means. The blasting operations break the rock into smaller pieces that can then be handled by construction equipment and hauled away.
Rawson Materials will post on their Facebook page up to a week before a blast is set to occur. The day of a blast the Facebook page will be updated and the Town Manager and Westerly Police Department will be notified of the time of the blast. Rawson also keeps a call list and provides notice of each blast up to 2 hours beforehand; if you would like to be added to Rawson’s call list please contact us at 860-481-.
The energy from the blast will sometimes travel through the ground in the form of airwaves. Often the airwaves are what cause you to feel your house shake. Since humans are extremely sensitive to all vibrations you may feel the shaking even though no structural damage is actually occurring.
Rawson Materials subcontracts all of their blasting work to licensed blasting professionals who are required by regulation to continually obtain training. Professional blasters are trained to plan, design, implement and monitor blasts. This training stresses safety in all aspects including protection of your property. Additionally, the licensed blasting professional must acquire a permit from the State Fire Marshal.
Prior to blasting, our subcontractors perform pre-blast inspections/pre-blast surveys to review the site conditions. The subcontractor also monitors each blast using seismographs and a decibel meter to ensure that the blast is within the limits set forth by federal and state regulations. Despite federal and state limits, Rawson Materials has also voluntarily adopted levels that are below the regulations with respect to the amount of powder utilized.
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In North America, safe vibration standards are based on scientific studies conducted by the U.S. Bureau of Mines (USBM). These studies recommend ground and air vibration limits based on scaled distance, peak particle velocity, air pressure and frequency. The purposes of these standards are to ensure that even cosmetic cracking will not occur in nearby structures. The standards are conservative meaning, even slightly exceeding these standards will not necessarily harm a structure.
For ground vibrations, the standard is a function of frequency and peak particle velocity (ppv). Rhode Island regulations allow for 1.99 ppv at 10 hz or greater.
For air vibrations, the standard is a function of pressure that is most often reported as decibels with a common limit of 133 decibels (db) with a 2Hz system.
No. The federal government, specifically the U.S. Bureau of Mines, has conducted studies where they have vibrated entire houses for several days. Their conclusions have shown that repetitive blasting at allowable standards will not cause damage.
The foundation is the strongest part of a house. Vibration standards are designed to protect the weakest parts of the house, such as plaster and drywall. Ground vibrations strong enough to crack foundations consisting of concrete and masonry would far exceed the limits set by typical standards.
The U.S. Bureau of Mines published RI in detailing what happens to a home as a result of ground vibration from surface mine blasting. The study concluded that typical human activity such as slamming a door or pounding a nail into a wall creates strains in a residence well in excess of those corresponding to typical low-level blast vibrations.
Below-ground structures are confined in the ground and can only move as much as the ground itself moves. They respond less to the ground waves than a house or other buildings above-ground. Therefore, standards that protect houses will also protect below-ground structures.
Rawson is subject to oversight by the Mine Safety and Health Administration (MSHA). Rawson complies with all MSHA regulations in addition to regulations set by the state. Since a majority of Rawson’s plants are located in Connecticut, Rawson complies with Connecticut regulations at all of their plants even though Rhode Island has less stringent regulations.
For blasting, Rawson requires its subcontractors to operate at blasting levels that are proven by the U.S. Bureau of Mines to protect the health and safety of neighbors and employees, as well as the integrity of nearby above ground and underground structures.
Rawson will meet or exceed all applicable requirements related to obtaining and maintaining their air permits. Quality air permits generally require processing plants to utilize best available control technologies (BACT) to control dust and other emissions. The use of BACT, helps to ensure that dust and other emissions from the processing plant will be protective of public health, welfare, property and the environment. Currently, Rawson continuously runs a water truck during hours of operation at each of its locations unless it is raining. In addition to the water truck, Rawson locations use anti-tracking pads to reduce the amount dust being taken off the property by vehicle traffic. Additionally, much of the plant equipment is equipped with dust suppression apparatus (fog/spray nozzles).
Rawson is obligated to carefully monitor any potential for pollution. Dust and run-off from rainfall and any machinery can and will be mitigated and managed so that it poses minimal impact and no threat to local habitats, including the marine environment. Rawson’s plants are clean, working environments that adhere to stringent regulations to keep it that way.
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Instructions for use for blasting work with BETONAMIT®
Instructions for use
Drilling. Filling. Amazement.
With Betonamit, ANYONE can crush rock, stone or concrete in just 3 steps. Mix Betonamit powder with water and fill into the previously drilled holes. The material sets and begins to expand. Betonamit develops an expansion pressure of over 10,000 tons per square metre for cold blasting.
3 steps to silent demolition.
The first step is to drill the holes. The drill hole diameter to be selected is 25-45mm (1″ – 1 3/4″). The maximum drill hole spacing is 10 times the drill hole diameter and therefore 25-45 cm (10″ – 18″). Smaller borehole spacings lead to even better results. The drill holes should be dry and as free of drilling dust as possible.
In the second step, add the Betonamit powder to the mixing container and loosen slightly with the agitator. Then add exactly 1.2 liters (40oz) of cold and clean water per 5kg (11lb) of concrete mix and mix intensively with an agitator for 2 minutes until a flowable and homogeneous mixture is obtained. The mixture appears relatively dry at first, but the consistency changes abruptly during the mixing process.
In the final step, fill the mixture directly from the mixing container into the drill holes. No additional mechanical closure is required. Dilute excess Betonamit mixture with plenty of water for deactivation and dispose of with the remaining construction waste. The total processing time should not exceed 5 minutes.
Now we just have to wait for the gentle blasting. The mixture hardens slowly in the borehole and sets. The expansion pressure then gradually begins to build up. The fracture time depends mainly on the temperature, the borehole diameter and the borehole spacing. Cracking always occurs in the direction of least resistance. A larger drill hole diameter means more force, shorter reaction time and wider crack formation. Smaller distances between the drill holes mean smaller fragments and a shorter reaction time. As a rule, small hairline cracks are already visible in some places after a few hours. These then continue to widen and new cracks appear. Don’t make the mistake of starting to remove the fragments too early. It is best to let the product work for as long as possible, because with every hour it becomes easier to clear away or remove the blasted object. With a little experience, the blast pattern and blasting time can be predicted very accurately and almost all blasting work can be carried out explosion-free.
Tip: BETONAMIT continues to expand over several days. This means that the more time you give the product, the easier it is to remove the fragments. Therefore, be patient and allow BETONAMIT to work for as long as possible to achieve the best result.
Please observe our safety regulations when handling Betonamit.
Working with BETONAMIT® is that simple.
How blasting works with BETONAMIT®
Project example
Demolition of concrete staircase
BETONAMIT is very often used to crush concrete stairs or other concrete staircases or concrete steps. For this purpose, the drill holes are drilled in the rear area of the concrete steps in order to achieve the most effective blasting over the entire surface. The more holes are drilled, the smaller the fragments are. If the concrete staircase is trapped by an external wall, for example, empty holes on the side can help to relieve pressure.
Project example
Crushing of boulders
Crushing boulders and other stones is one of the main applications of BETONAMIT. Here too, the fragment size is defined by the number of drill holes. The correct drill hole depth is important for this application, which should be at least ¾ of the total depth so that the stone tears through to the bottom and does not break out sideways.
Positioning the drill holes
Principle
Cracking always occurs in the direction of least resistance. A larger drill hole diameter means more force, shorter reaction time and wider crack formation. Smaller distances between the drill holes mean smaller fragments and a shorter reaction time.
Columns
The holes are drilled a short distance apart in a line. Cracking occurs from hole to hole. In this way, objects can be separated or split relatively precisely during blasting work. The drill hole depth should be at least ¾ of the total depth to ensure complete tear-through and prevent lateral break-out. Smaller stones or concrete elements can usually be split with a central drill hole.
Shredding
The holes are usually drilled in staggered rows in order to obtain the smallest possible fragments. The more drill holes, the smaller the fragments. The cracks form in a criss-cross pattern. Here too, larger boreholes generate a significantly higher expansion pressure, which leads to a better blasting result.
Ablation
If there is no free side to displace the material, space must first be created. The target level (Dt) is usually over-drilled by 5-15 cm (2″- 6″) to avoid subsequent caulking work as far as possible. The expansion pressure (F) always develops 90° to the borehole. With angled holes, it is therefore possible to create a free side where the pressure or material can escape, even in unfavorable situations. Ideally, all holes should be drilled first and filled at the same time so that they can work together.
Release
To loosen rock, the holes are drilled in several rows 10-15 cm (2″- 6″) below the required ground level (Dt) and backfilled. This breaks up and loosens the subsoil so that it can then be removed by excavator or, in some cases, by hand. Here too, the swelling explosive works most effectively when the holes are drilled at an angle so that part of the force (F) can act upwards. Several rows of holes can be filled with BETONAMIT® at the same time. Cracks will appear in the front row first. The next row is then pressed in.
Material consumption
The consumption per meter of borehole to be filled depends on the borehole diameter. To calculate the required amount of Betonamit, the sum of all boreholes in meters or feet is multiplied by the respective factor.
Examples
You have 10 drill holes (ø 40mm) with a depth of 0.3 meters
Factor for ø 40 mm: 2.2 kg (table)
10 holes x 0.3 m x 2.2 kg = 6.6 kg Betonamit
You have 10 holes (ø 1 1/2″) with a depth of 5 feet
Factor for ø 1 1/2″: 1.34 lb (table)
10 holes x 5 feet x 1.34 lb = 67 lb Betonamit
technical specifications and reaction time
The following table shows the expected reaction time as a function of temperature. You will also find further helpful information on the application here. As the drill hole diameter has an enormous effect on the expansion force and reaction time, we recommend selecting the largest possible drill bit wherever possible.
safety regulations
- Wear safety goggles at all times when working with Betonamit.
- Only use Betonamit at an object temperature between 0°C and max. 35°C. (32-95°F)
- Protect the Betonamit powder from heat before use.
- Do not use hot water. (max. 20°C / 68°F)
- Observe the correct amount of water: 1.2 liters (40oz) per 5kg/11lb Betonamit / 0.6 liters (20oz) per 2.5kg(5.5lb) Betonamit
- Mix by machine (electric agitator) and not by hand. (Poor mixture increases the risk of blow-out)
- Only use drill bits with a diameter of 25-45 mm. (1″ – 1 3/4″)
- The minimum borehole depth corresponds to 5 times the borehole diameter.
- The maximum borehole depth depends on the situation, but is approx. 6 meters. (20ft.)
- The drill holes must be as clean and dry as possible.
- On hot days, fill the boreholes early in the morning.
- Pour the Betonamit into the drill holes immediately after mixing.
- Make sure that the expansion force cannot cause any unwanted damage.
- Dilute material residues with plenty of water and dispose of them in accordance with local regulations. (building rubble)
- Never look directly into the filled drill holes (risk of blow-out)
- Cordon off the workplace to prevent unauthorized access. (blow-out or loosening material)
- Do not pour the mixture into bottles or other closed containers. (explosive effect)
- Please also observe the hazard and safety instructions on the packaging. (GHS)
CAUTION: Failure to comply with the regulations, improper handling or excessively warm conditions may result in a blow-out. A blow-out is the sudden, explosive escape of concrete ammite from the borehole. If you are hit in the face by the material escaping at high pressure, this can lead to injuries and serious eye damage. Therefore, never look directly into the filled drill holes and always wear safety goggles when working with Betonamit. After a first blow-out has occurred, this is repeated about 3-6 times and can also occur in other boreholes. Close the work area to all persons for at least 3 hours.
Betonamite is non-toxic, but contains a large proportion of unslaked lime (calcium oxide).
- In case of contact with eyes: Rinse cautiously with water for several minutes. Remove any contact lenses if possible. Continue rinsing.
- In case of contact with skin: In case of allergic reactions, wash with soap and water and consult a doctor.
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