Concrete is a very strong building material, and it’s used in a wide variety of applications. It can resist large amounts of compression, as well as a lot of weight.
The key to a successful pour of concrete is in the mixing. Cement alone is not as strong as the finished product, so it’s typically mixed with sand (and sometimes very small pieces of stone). When cement and sand are mixed together they form concrete, which is then capable of resisting a lot of pressure.
In the right proportions, concrete can last for decades and even centuries. There are many different concrete mix recipes, and they vary depending on the project at hand. One popular recipe is one part cement to two parts sand, and four parts gravel or crushed rock (or aggregate). This creates a concrete with medium strength, which is suitable for most construction projects.
The other factor that contributes to a good mix is the amount of water. When water is added to the mixture it triggers a chemical reaction called hydration, which causes the cement and sand to harden and bond together. Adding too much cement can prevent the proper hydration process from happening, which reduces the strength of the concrete.
Adding too much cement can also reduce the workability of the concrete, making it difficult to get into your mold and form it into the shape you need. For this reason, it’s important to follow the appropriate ratio of water to cement in your specific recipe.
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