Compressive Strength % of 28-day moist-cured Concrete Chart
Compressive Strength % of 28-day moist-cured Concrete Chart
(OP)
Hello.
I'm looking for data to put into excell to create the Compressive strenght, percent of 28-day moist-cured concrete chart to get results for crushed cylinders on days other than 7-day and 28-day.
I cursh machine was done I had to catch up on the crushes. I have the paper chart/graph, but I would like to be able to create that graph to use in excell. I can get more accurate results if I could.
Anyone know where to get this?
Matt
P.S. The graph should be age/days vs Percent
I'm looking for data to put into excell to create the Compressive strenght, percent of 28-day moist-cured concrete chart to get results for crushed cylinders on days other than 7-day and 28-day.
I cursh machine was done I had to catch up on the crushes. I have the paper chart/graph, but I would like to be able to create that graph to use in excell. I can get more accurate results if I could.
Anyone know where to get this?
Matt
P.S. The graph should be age/days vs Percent





RE: Compressive Strength % of 28-day moist-cured Concrete Chart
How many days were you behind and how many tests are we talking about?
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
This is the chart I'm looking for in excell.
http://www3.mb.sympatico.ca/~hclark/chart.jpg
Matt
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
Maybe I'm wrong, but I have used this chart in the past and I have seen other use it as well. http://www3.mb.sympatico.ca/~hclark/chart.jpg
I guess we we'll just post the results for the actuall days ie. 35 days, 10, days ect.
Thanks again
Matt
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
I have cement powder, admixtures, water. The chart doesn't seem to care about whats in the mix, its just based on Percent. ie. Usually your 7-day is 75% of your 28-day strenght. Isn't this chart a standard?
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
The chart is not standard. Say a mix has a quantity of flyash substituted for cement. This mix might reach only 50% at 7 days and only 90% at 28 days.
Every mix cures and gains strength at different rates. Otherwise every 7 day break for every 3000 psi mix would be exactly the same.
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
Here are our results. We only spec 35MPa after 28-days.
Pour # kN Mpa Actual Day Crushed Required Day Crush
163A 328 40 8-Sep 14-Day 1-Sep 7-Day
164A 329 41 8-Sep 13-Day 2-Sep 7-Day
165A 331 41 8-Sep 10-Day 5-Sep 7-Day
166A 300 37 8-Sep 9-Day 6-Sep 7-Day
167A 305 38 8-Sep 8-Day 7-Sep 7-Day
168A 289 36 8-Sep 7-Day 8-Sep 7-Day
148B 325 40 8-Sep 35-Day 1-Sep 28-Day
148C 355 44 8-Sep 35-Day 1-Sep 28-Day
149B 357 44 8-Sep 34-Day 2-Sep 28-Day
149C 352 43 8-Sep 34-Day 2-Sep 28-Day
169A 296 37 12-Sep 10-Day 9-Sep 7-Day
150B 364 45 12-Sep 35-Day 5-Sep 28-Day
150C 360 44 12-Sep 35-Day 5-Sep 28-Day
151B 349 43 12-Sep 34-Day 6-Sep 28-Day
151C 351 43 12-Sep 34-Day 6-Sep 28-Day
152B 322 40 12-Sep 33-Day 7-Sep 28-Day
152C 319 39 12-Sep 33-Day 7-Sep 28-Day
153C 331 41 12-Sep 32-Day 8-Sep 28-Day
154B 357 44 12-Sep 31-Day 9-Sep 28-Day
154C 345 43 12-Sep 31-Day 9-Sep 28-Day
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
RE: Compressive Strength % of 28-day moist-cured Concrete Chart
"Well even your 7 day breaks appear to meet the 28 day requirement. Why not just report what you have?"
My 7-days were more like 10-day crushes.