As the name suggests, Dry pack concrete has no liquid or water component added during the bagging or preparation phase. For making dry pack concrete, cement, sand, and aggregate are mixed evenly and thoroughly to attain a consistent homogeneous texture.
Dry mix concrete that contains cement, sand, and aggregates in pre-defined proportions are available for various purposes. Later, this dry mix concrete is stored in bags or bulks for mixing with water at the construction site. Dry Pack Bags are transported using vehicles and pallets in different sizes, whenever required.
What Is Dry Pack Concrete?
Dry pack concrete is a mixture of cement, sand, and aggregate in set proportions. Cement mixes with water by the hydration procedure and binds aggregates. However, the mixture remains in aggregates without water.
In general, Dry mix concrete has one part of cement, two parts of sand, and three parts of aggregates. These ratios can be adjusted to increase the strength as per the project requirements.
What Is Dry Packing Made From?
Dry pack concrete is made by mixing cement, sand, aggregate, and water (in minuscule amounts). For attaining a consistent and regular mixture, there is a need to mix them all thoroughly.
Water or other liquid needs to be added to the mixture in required quantities and mixed evenly to use a dry concrete mix at the construction site.
The excellent part of dry mix concrete is that it has three to six months of shell life. It means that dry pack concrete can be used safely anywhere within this time period. It does not become unusable like wet concrete.
Also, there are various applications where dry pack concrete is used with little water for giving it desired consistency and strength.
Where Can You Use Dry Pack?
Dry mix concrete can be used to fix the holes or cracks in foundations, paving roads, and other masonry structures. It is mainly useful in small and medium-sized projects such as driveway or pavement repairing. Also, it is used for repairing small spots.
For any purpose, work is started by gathering all materials and tools that are needed. Prepare the work area by cleaning the source and freeing it from debris and dirt, if any. Workers use a stiff brush to clean holes and cracks in the working surface.
Setting mesh and formwork as required for your project is also essential to increase the structural strength.
What Can You Use For Dry Pack Concrete?
For kickstarting any construction project, you can use the below tools and materials for completing a dry pack concrete job-
- Dry Mix Concrete bags
- Clean water
- Protective Gear for protection against debris and dust
- Nose Or Mouth Masks
- Safety goggles
- Thick gloves
The first step experts take is to decide the quantity of dry pack concrete. You can determine the amount by using packaging yield and volume. The dry mix is packed in 20, 40, and 80 pounds units. In the working area or barrow for small projects, pour a dry mix pack in the direction of the wind to prevent the unintended breathing of dust particles.
The best idea is to mix half the quantity and save the rest for later use to prevent wastage. If your project is large, you can also use a concrete mixer. Then, create a small hole in it to pour some water. There is nothing to worry about water splashing because you will need to mix evenly until a workable consistency is attained.
Use a shovel for mixing water and concrete. Move the shovel so that you canoe, i.e., move the shovel up and down unless the concrete mixes with water properly. For testing the dry pack concrete mixture, take a handful of the prepared mixture. Check whether it forms a solid round shape when you press it in the palm of your hand.
If it runs through your finger, then you might have added too much water. Any excess amount of water and concrete can bleed off the project space and make it lose its strength. Attaining a proper dry pack consistency is a crucial step.
After getting a proper consistency, place your dry pack in the repairing areas using a shovel. Use a screed board to smoothen the surface. Compact the workspace to remove trapped air and voids while placing concrete.
Finish it by laying dry pack mix according to the specifications or project and barricading the space to avoid stepping on it.
At last, clean the area around, remove all concrete bags, and clean the work tools used. Sprinkle water over the area for one week until it dries and cures.
What Is Shotcreting Of Dry Pack Concrete?
Shotcreting is done for commercial projects. It is the procedure of applying concrete layers through compressed air from a mortar gun.
The dry pack concrete mixture is shot using a hose at the working construction area. Water is sent with a different hose and added to the nozzle as the dry concrete mix is sprayed.
The dryness of sand will determine the amount of water to use. The drier it is, the more water it uses. Shotcreting dry is used widely in mining and narrow spaces where there is difficult vehicle access.
In a nutshell, the benefits of dry pack technology are as follows-
It is easy to start as it does not require elaborate mixing with water. It is easy to clean up and shut down. The dry concrete mix technology makes a lesser mess and creates minimal wastage.