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8/10/2019 Lab2 Handout
1/15
UNIVERSITY OF CAPE TOWN, DEPARTMENT OF CIVIL
CIV2037F
Experiment 2
Title: Concrete compressive strength
Experiment objectives
(i) Expose students to testing concrete(ii) Identity the critical factors that affect concrete compression strength.
(iii)Perform statistical analysis of data , use TWO FACTOR ANOVA to screen factors and
investigate interactions if any.
(iii) Report writing
BackgroundConcrete is a mixture of cement, sand, stone (aggregate) and water. The compressive strength
depends on many factors and this experiment will provide a hands on practice on factor
screening. This experiment focuses on just two which are water cement ratio and binder type.
A number of concrete cubes have been cast using two water cement ratios of 0.4 and 0.55,
two binder types 50/50 OPC/GGBS and 100% OPC.
The concrete cubes have been cured for a period of 13days. The general testing procedure is
attached. You will be expected to do the labs in groups and due to limitations of space; each
group will have 20minutes for the lab. Please check the attached groups for the lab times
for your group. Note that the whole dataset for the whole testing wil l be used for your
report.
Uncertainty analysis(c) State the instrument resolutions for devices in your experiment. [1]
(d) Using dimensions from a single experimental unit and crushing load, calculate theuncertainty in the compressive strength [2]
Descriptive statisticsFor each set of results;
(e) Perform numerical summaries of compressive strength for each treatment (the summaries
should include mean, range and standard error.[3]
(f) Plot comparative box plots for the treatments. Are there any outliers? If so what are the
possible reasons for the outliers?[4]
Experiment design
(a) Identify at least 3 control factors in this experiment that affect compressive strength. [3](b) Identify the different treatments applied in the experiment. [2]
Inferential statistics [6marks](g) Does the additive model hold for this experiment?
*** Depending on the outcome in (g) either check the main effects hypothesis in (h and i) or
make a table of means
(h) Is there any evidence that compressive strength of concrete is influenced by w/c ratio?
(i) Is there evidence that compressive strength is influenced by the binder type?
[Assume 5% significance level in your ANOVA]
8/10/2019 Lab2 Handout
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UNIVERSITY OF CAPE TOWN, DEPARTMENT OF CIVIL
CIV2037F
Group
W/C
ratio Binder type Number of Time
specimen
A 0.55 100 OPC 3 14:00
0.4 100 OPC 3
B 0.55 50/50OPC/GGBS 3 14:15
0.4 50/50 OPC/GGBS 3
C 0.55 100 OPC 3 14:30
0.55 50/50 OPC/GGBS 3
D 0.4 100 OPC 3 14:45
0.4 50/50 OPC/GGBS 3
E 0.55 100 OPC 3 15:00
0.4 100 OPC 3F 0.55 50/50 OPC/GGBS 3 15:15
0.4 50/50 OPC/GGBS 3
Note:Marks are indicated in brackets and then summed in relevant sections as shown general
marking scheme. Page 3 of this hand-out MUST be attached in your report just after the title
page.
Report: Due 02ndMay 2013 for the first lab session. All submissions will be hard copy.
8/10/2019 Lab2 Handout
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UNIVERSITY OF CAPE TOWN, DEPARTMENT OF CIVIL
CIV2037F
General marking scheme:
Title Page 1mark______
Summary(Abstract) 3marks______
Main BodyIntroduction 2marks_______
Methodogy (including experiment design aspects) 7marks________
Results, (summary statistics, uncertainty analysis, ANOVA) 16marks_______
Discussion 3marks________
Conclusions 2marks________
Reference List 2marks________
Appendices (Raw data and sample calculations) 2marks________
TOTAL _______/38
In each section marks will be awarded on the basis of your understanding of the
problem, application of statistics, uncertainty and communication skills (format, layout,
spelling and grammar)
TITLE PAGEThe title page should include your name, student number, title of your project,
submission date, name of course and name of lecturer.
8/10/2019 Lab2 Handout
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UNIVERSITY OF CAPE TOWN, DEPARTMENT OF CIVIL
CIV2037F
General marking scheme:
Title Page 1mark______
Summary(Abstract) 3marks______
Main BodyIntroduction 2marks_______
Methodogy (including experiment design aspects) 7marks________
Results, (summary statistics, uncertainty analysis, ANOVA) 16marks_______
Discussion 3marks________
Conclusions 2marks________
Reference List 2marks________
Appendices (Raw data and sample calculations) 2marks________
TOTAL _______/38
In each section marks will be awarded on the basis of your understanding of the
problem, application of statistics, uncertainty and communication skills (format, layout,
spelling and grammar)
TITLE PAGEThe title page should include your name, student number, title of your project,
submission date, name of course and name of lecturer.
8/10/2019 Lab2 Handout
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Name Student number Group Signature
Abrahams, Tohir abrtoh003
Bukasa, Deogracia bksdeo001
Dunnell, Helen dnnhel001
Gaszynski, Chris gszchr001
Holmes, Matthew hlmmat002
Kok, Kevin kkxkev001
Mabaso, Sibusiso mbssib005
Appolus, Michael appmic005
Chitate, Nyasha chtnya003
Earl, Andrew erland002
Gihwala, Manoj ghwman001
Hurworth, Nick hrwnic003
Kvammen, Andreas kvmand001
Macfarlane, Andrew mcfand005
Baker, Jordan bkrjor001
Coetzee, Joshua ctzjos002
Eksteen, Ebrahim eksebr001
Givah, Chisomo gvhchi001
Jeena, Priyal jnxpri001
Lall Mahomed, Zubair lllmuh002
Magadlela, Khululekani mgdkhu003
Blair, Kelly blrkel002
Colombo, Roberto clmrob005
Etienne, Mikael dzreti001
Grosse - Weischede, Bern grsfri001Jhamba, Leonel jhmleo001
Lebea, Itumeleng lbxitu001
Mahlangeni, Lutho mhllut003
Blaker, Byron blkbyr001
De Waal, Lauren dwllau001
Fick, Andree fckand002
Heath, Jack hthrob004
Kalmo, Mari klmmar003
Lejake, Tebaco ljkteb001
Mapulanga, Perry mplemm002
Boyjonauth, Nikhil nkhboy001
Dipela, Sello dplsel001
Fry, Anthony fryant001
Hill, Tracey hlltra004
Kimathi, Linet kmtlin002
Likhade, Rendani lkhren001Martinez, Felix mrtfel001
A
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