Concrete Mixing For Beginners.
Before mixing newton swimming pool concrete, you first have to ensure safety comes first. The first and most important detail about concrete that beginners must know is that concrete is acidic. The cement alone is very harmful and can lead to some nasty burns on your exposed skin, and can even penetrate through clothing if it is not immediately washed off. Keep your eyes safe by wearing safety eye ware like the safety goggles when you are mixing, finishing and placing the concrete. Another safety precaution is wearing a respiratory mask to avoid breathing harmful dust in your lungs. The commonly used safety gadget is a paper dust mask, but using a respiratory mask with cartridge is a better choice.
Step number two is learning the mixing ratios. This is a very important step and beginners must understand this. If you fail to attain the correct mixing proportions, the strength of your concrete will not only be compromised, it will also give undesirable and unpredictable results. Adding more than enough water is one of the common mistakes beginners often make.
Since it only needs just a small amount of water to turn the concrete from dry to extremely wet, it is very easy for a beginner to over-water. Only a small amount of water is required to achieve a chemical reaction that makes the concrete mix to become hard. Mixing it with a damp consistent sand is enough to set the concrete. The more you add water to the mix, the more the strength in the final product drops. This may lead to you newton driveways having cracks.
Another important factor is the actual mixing process. The more thorough you are with the mixing, the stronger your final product is bound to be. Under-mixing results in pockets. This is basically when the aggregates and the cement have not completely mixed together. This will make weak points develop in your final product. You might only get a whole section which is wet and not set up.
Always observe heat as well as direct sunlight during the mixing process. Direct sunlight will speed the setting up and make the concrete ten time harder. Most beginners leave their concrete under direct sunlight for long making it turn before placing or finishing.
Many beginners make the mistake of adding water on the concrete when it is about to set up. This mostly happens when the beginner realizes more water is required or they just have difficulties in finishing. Only add water once during the entire mixing process. Adding water a second time will compromise the integrity and might prevent the concrete from setting up.
The concrete mix often take one month to cure to its maximum strength. During this time is important to always keep the concrete wet. Ensure the concrete is constantly wet during this process. The concrete must always be kept wet during curing.