Concrete (or at least the use of similar materials) is ancient. It’s not a fairly recent creation as far as construction materials go. The Ancient Romans used a crude form of concrete to build their great cities and edifices. Picture this: these ancient buildings have survived for thousands of years. In comparison, today’s Portland cement (the modern one) can last up to 50 years if constantly exposed to saltwater.
Greater Strength From Preparation
Concrete’s strength is beyond question. But, we believe that specific circumstances and processes can breed stronger concrete. First, there’s the importance of reinforcement. Reinforced concrete is among the sturdiest materials you’ll ever encounter. At as much as 1360 kgs of concentrated load, there’s no visible cracking in a reinforced concrete slab. Only at 1814 kgs do cracks show up on a typical reinforced concrete slab.
Proper mixing is another contributor to concrete strength. Among the biggest concerns is the water-to-cement ratio. Cement acts as the glue in concrete. More water means weaker concrete for a given amount of cement. There must also be enough cement in each cubic yard of concrete to make sure it’s strong. Concrete that’s to be exposed to cold requires at least six bags of cement per cubic yard. That’s equal to a design strength of 4,000 psi.
Fly ash is a good additive to introduce into the mixture. This type of ash is almost entirely similar to volcanic ash—something that the ancient Romans used back in the day. Remember the thing about their millennia-old structures still existing today? It’s because volcanic ash is a much better cement.
If fly ash is available, it should replace conventional cement material. For example, 100 pounds of cement must be replaced with 120 pounds of fly ash per cubic yard. Fly ash works by making the concrete pump easier; thereby, making the set concrete stronger. Concrete made with fly ash is also more chemical resistant. This makes the slab perfect for use in corrosive environments.
At Powerpac, we know concrete like the backs of our hands. Contact us today if you need help with your projects.