Concrete Strength

Overview

Objectives/Goals I tested to see what comercial concrete additive would make the concrete the strongest. I used three additives a a fast dry, a slow dry, and a flow controle additive. Methods/Materials all the concrete was mixed in with 20 Lb. of cement 7.5 and two thirds cups of water was then added and the recomended amount od additive was added also. the 20 pound batches would make 6 samples all samples were one inch thick and in and each saple was in the same size tray. the samples had seven dayes to cure. After the seven day drying period we tested them in a macine that can be set to the amount of weight the abount of weight it brock under was then recorded. after all my test I averaged all my test and came up with my conclusions. Results the flow controle additive made the concrete the strongest with an average strength of 5.52kg. Drying accelerator was second with the average amount of 4.43kg. the controle was third with the avrage amount of 2.73kg. The drying retardant was last with the avrage amount of 0.21kg. Conclusions/Discussion my results some wht surprised me i thought that the flow controle would be the strongest but i thoght the accelereator would be the weakest instead of the second. I would recommened using flow controle when poring a drive way or side walk i would deffinetly recommened it on colomes and briges too. the slow down would be the worst product to use because it made the concrete crumbaly and it cracked while drying.

Competition history

• CSEF 2003 Structural Capability & Strength of Materials (Junior Division Only) · Entry J1808

Resources

• CSEF project summary ↗

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