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- hmm, I wonder if this cantilever slab is strong enough for a big party
- Well, according to the contractor, the concrete poured for this slab was very poor. The compressive strength at 28 days is very low
- Oh man, what should we do in this case
- We can reinforce this slab but it will cost some money and time
- Well, for my future projects, Is there anyway we can know if the concrete will be strong and durable enough before pouring it!
- This is unacceptable! I need to talk to the contractor and the engineer who designed it!
- It won't help, they've done what everyone always does. Compressive strength of concrete which would only help after the concrete is hard.
- Now that you've mentioned it, there is a simple and accurate test we can do while the concrete is still fresh
- water to cement ratio in concrete is a component that is directly related to the strength and durability of concrete
- A lot of water that is not considered in the mix design is added which would significantly decrease the strength and durability of concrete
- However, to solve this problem, a new test called the Phoenix test is developed to calculate an accurate enough water to cement ratio
- The Phoenix test can help us determine the water to cement ratio of fresh concrete within 15-18 minutes. Thus we will know if the concrete will be strong enough according to that.
- It also helps us determine the durability of the concrete. After we determined the strength and durability, we can either accept or reject the concrete. Thus we can avoid all the extra costs, time, and employee hours.
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