This is the whole lab questions about the concrete lab.
Questions to be addressed in the lab report: 1. Fill in the group data sheet posted in the lab and include this table in your report.
2. Your report should include all data related to the preparation of your concrete, the group data sheet, and any calculations pertaining to these items.
3. Plot compressive strength (y) versus cure time (x) for the two mixtures (on one plot). Add a polynomial trend line for both mixtures.
4. From the class results, comment on how the mix ratio, weight % water, curing time, water/cement ratio, temperature, type of cement used and slump affect concrete’s compressive strength. What was the percent gain in strength between the 7 day and 28 day samples? What causes the difference? In addition, you need to note the fineness modulus of the concrete sand from the sand sieve analysis in rotation A.
5. Be sure to include your observations of the physical properties of the concrete mixtures.
6. How does the compressive strength of the samples compare to the expected compressive strength of cured concrete? If different, explain why.