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Concrete Demolition and Rock Breaking, Cracking, Splitting has never been easier with Dexpan® Non-Explosive Demolition Agent. Dexpan® is a cement with an amazing 18,000 PSI expanding strength when mixed with water. Poured into drilled holes, Dexpan® breaks concrete and splits rocks safely and quietly.

  

 

How to break concrete or crack, split rocks easily?

There are only 3 Easy Steps to use Dexpan: Drill, Mix, and Pour.

Always wear Safety Goggles, Rubber Gloves, a Dust-Proof Mask, and Proper Clothing when handling Dexpan.
Forceful Blowouts and Alkaline Burns may occur. Make sure to read safety precautions and first aid at the bottom of this page.

 

STEP 1: Drilling
Use a 1-1/2 inches (or 3.8 cm) drill bit; holes should be drilled 1 foot (or 30 cm) apart. 80 to 90% of the depth, do not go through. Note: Using smaller drill bit will reduce expanding strength. Please call for applications with depths less than 6 inches. (See common

Use a 1-1/2 inches (or 3.8 cm) drill bit; holes should be drilled 1 foot (or 30 cm) apart. 80 to 90% of the depth, do not go through. Note: Using smaller drill bit will reduce expanding strength. Please call for applications with depths less than 6 inches. (See common drilling patterns

 

Tip 1: To insure success, Dexpan® needs empty space to expand to. Make sure that the rock or concrete has an open face for expansion equal to the drilling depth. If there is no expansive space, extra holes may be required to establish it.

 

Tip 2: Dexpan® cracks according to drilling patterns designed for controlled demolition and Easy Clean up. Call for our Free drilling patterns to minimize consumption of Dexpan® by cutting rocks or concrete into desired sizes.

 

If you encounter rebar while drilling, move drill bit a few inches to avoid drill bit damage.

 

STEP 2: Mixing
Choose correct type of Dexpan® based on ambient and core temperature. Core temperature is the temperature inside of the rock or concrete, which can be different from the ambient temperature.
In a bucket, combine 0.4 gallons (or Three 500mL bottles) of cold water with one 11 Lb. (or 5 Kg.) bag of Dexpan®. Mix well to a slurry, no lumps. A drill and paddle is recommended.

 

STEP 3: Pouring
Dexpan® slurry should be poured into holes within 10-15 minutes after mixing.
DO NOT leave excess Dexpan® slurry in the bucket as blow-outs may occur. Dispose of waste according to federal, state, and/or local regulations.

 
Coverage: Normally one 11 Lb. (or 5 Kg.) bag of Dexpan® can fill up to 9 lineal feet (or 2.5 meters) of 1.5 in (or 3.8 cm) diameter holes.

 

Tip 3: Clean holes after drilling using an air hose or vacuum to remove excess dust, this is not a requirement, but is recommended for best results.

 

Tip 4: Be sure to protect the filled holes from direct sun light, rain and snow. If water might get into holes, then Dexpan® slurry should be poured into plastic tubing.

 

Tip 5: For horizontal holes, you may mix Dexpan® thicker and push it into horizontal holes.

 

Dexpan® Cracking or Breaking Time:
Properly drilled and mixed, the cracks may appear after 2 to 8 hours of filling, depending on ambient and core temperature, humidity, rock or concrete hardness.
Note: Although the Dexpan® slurry may look dry on top, it does not mean it has stopped working, please allow the full 24 hours before calling our technical department.
Do not remove Dexpan from the holes or try other methods, these could void your warranty.
If Dexpan® completely dries into a powder and did not crack, pour additional water onto Dexpan® filled holes to restart the process.

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 As you can see after 6 hours, hairline cracks appear in this concrete foundation filled with rebars.

 

 2 hours after, cracks are getting wider and deeper.

 

24 Hours after pouring, Dexpan® cracks are well developed and the concrete is ready to be disposed of.

 

Cut off exposed rebars, even they could not stop Dexpan from Breaking this concrete foundation.

 

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Should you have any questions, please do not hesitate to contact our technical support at(See Frequently Asked Questions

Dexpan® Non-Explosive controlled demolition agent, the easy to use, cost effective way to work safer!

 

**WARNING** Improper use may cause serious injury. Read instructions carefully. (See

Improper use may cause serious injury. Read instructions carefully. (See Dexpan Safety Data Sheet

• Forceful Blowouts may occur once mixed with water! Keep a safe distance. DO NOT look directly into filled holes. Use of Dexpan® in hot weather could increase chances of blowouts. DO NOT pour into hot holes. Use iced water in summer.

• Alkaline Burns may occur. Do Not Breathe in Dust. Avoid Eye and Skin Contact. Rinse it off IMMEDIATELY and thoroughly with plenty of water for at least 20 minutes. Open eye lids, remove all debris. Rinse until pH back to normal reading 7, and consult doctor. Refer to SDS (Safety Data Sheet).
• Keep Dexpan® in DRY storage. Seal box / bag after use.

• Keep out of reach of children and pets.

Rock breaking has traditionally been associated with explosive techniques that require careful planning and execution. However, advancements in technology have paved the way for non-explosive methods that are safer, more precise, and environmentally friendly. In this blog, we will delve into the world of rock breaking without blasting, exploring the various techniques and tools that are revolutionizing the industry.

Expanding Grout

How Expanding Grout Works

Expanding grout is a chemical compound that expands when mixed with water, exerting immense pressure on the surrounding rock. The process begins by drilling a series of holes into the rock, similar to the methods used with hydraulic splitting or chemical rock-breaking agents. The expanding grout is then carefully poured into these boreholes, where it penetrates the fissures and cracks within the rock mass.

Advantages of Expanding Grout

Expanding grout is an excellent choice for rock breaking due to its many advantages. It guarantees safety as a non-toxic and non-hazardous option. Precision is achieved with controlled fracturing, minimizing damage. The reduction of noise and vibrations makes it ideal for urban areas. It is environmentally friendly, producing no harmful gasses or pollutants. Cost-effectiveness is achieved through minimal equipment and reduced material waste. Finally, its versatility allows for its application in various rock types and projects. Overall, expanding grout offers a safe, precise, eco-friendly, cost-effective, and versatile solution for rock breaking.

Chemical Rock Breaking

Chemical rock breaking involves the use of chemical agents to weaken the rock structure, making it easier to break. One commonly used chemical agent is expansive mortar, also known as non-explosive demolition agent (NEDA). NEDA is a powdered substance that, when mixed with water and poured into pre-drilled holes, expands with tremendous force, causing the rock to crack. This technique is ideal for applications such as mining, construction, and quarrying.

Chemical rock breaking offers several advantages. Firstly, it is a non-percussive method, which means there are no vibrations or shock waves generated during the process, minimizing the risk of structural damage to nearby buildings or infrastructure. Secondly, it provides precise control over the size and direction of the fractures, allowing engineers to achieve the desired results with accuracy. Additionally, chemical rock breaking is relatively silent compared to explosive techniques, reducing noise pollution in residential and urban areas.

Hydraulic Splitting

Hydraulic splitting utilizes hydraulic pressure to fracture rock formations. The process involves drilling a series of closely spaced holes in the rock, into which hydraulic wedges are inserted. These wedges are then driven into the holes using a hydraulic pump, generating immense pressure that forces the rock to split along predetermined lines. Hydraulic splitting offers precise control over the direction and size of the fractures, making it suitable for delicate operations, such as in urban areas or near existing structures.

Hydraulic splitting provides several advantages over explosive techniques. Firstly, it eliminates the need for drilling and blasting, reducing the potential hazards associated with explosives. Secondly, it is a quiet and vibration-free method, making it suitable for use in noise-sensitive areas. Additionally, hydraulic splitting produces clean fractures without flyrock or airborne dust, ensuring a safer and healthier work environment.

Mechanical Rock Breaking

Mechanical methods rely on mechanical energy to break rocks. One commonly employed technique is the use of hydraulic breakers, also known as rock breakers or hammers. These heavy-duty tools are mounted onto excavators or backhoes and utilize a powerful hydraulic system to deliver repeated impacts to the rock surface, effectively fracturing it. Mechanical rock breaking is versatile and widely used in various industries, including mining, road construction, and demolition.

Mechanical rock breaking offers several advantages. Firstly, it provides high productivity, allowing for rapid and efficient rock fragmentation. Secondly, it can be used in various rock types and sizes, making it suitable for a wide range of applications. Additionally, mechanical rock breaking offers precise control over the breaking process, enabling engineers to achieve the desired fragmentation size for downstream processing or disposal.

Thermal Spalling

Thermal spalling is a non-explosive method that utilizes high-temperature differentials to break rock. By applying a controlled heat source, such as a flame jet or induction heater, to the surface of the rock, thermal stress is induced, causing the rock to expand. Subsequent cooling or rapid cooling through water application creates thermal stress gradients that result in spalling or flaking of the rock surface. Thermal spalling is particularly effective for breaking large boulders or concrete structures.

Thermal spalling offers unique advantages in certain applications. Firstly, it can be used in confined spaces or areas where vibrations and noise need to be minimized. Secondly, thermal spalling is a relatively low-cost method compared to other rock-breaking techniques, making it an attractive option for projects with budget constraints. Additionally, thermal spalling is a non-chemical method, which means it does not involve the use of potentially harmful substances, making it environmentally friendly.

Furthermore, thermal spalling allows for precise control over the depth and extent of the fractures. Engineers can adjust the heating and cooling parameters to achieve the desired results, whether it&#;s breaking the rock into smaller, manageable pieces or creating controlled fissures for excavation purposes. This level of control ensures greater safety and efficiency during the rock-breaking process.

The Future of Rock Breaking

Rock breaking without blasting has emerged as a safer, more precise, and environmentally friendly alternative to traditional explosive techniques. Chemical agents, hydraulic splitting, mechanical methods, and thermal spalling have revolutionized the industry, offering engineers and construction professionals a wide range of options to tackle rock-breaking challenges. 

These methods not only increase safety for workers and nearby communities but also reduce environmental impact, noise pollution, and vibration. As technology continues to advance, we can expect further innovations in rock-breaking methods, paving the way for a more efficient and sustainable future in the industry. Whether it&#;s using chemical agents to induce controlled cracking, utilizing hydraulic pressure for precise splitting, employing mechanical tools for rapid fragmentation, or harnessing thermal differentials for controlled spalling, the art of rock breaking has entered a new era of safety, efficiency, and environmental consciousness.

Contact us to discuss your requirements of Rock Demolition Chemical. Our experienced sales team can help you identify the options that best suit your needs.