CVEN 3400 – Structural Testing LaboratoryLab 4: Concrete Mix Design Laboratory

Procedure1) Follow the Procedure detailed in the Concrete Mix Design/CE330L Student Lab Manual (Department of Civil Engineering, The Southern Illinois University Edwardsville School of Engineering) – http://www.ce.siue.edu/330L/Lab Help Desk/Concrete/Concrete Lab Manual.pdf, except instead of making concrete for 1.2 ft3 we will create concrete for a 0.2 ft3 concrete beam using the data from the example concrete mix design or the pre-laboratory assignment.

2) Follow the Procedure detailed at http://www.ecoccs.com/Slump_Test.pdf regarding the slump test

3) Obtain the manufacturer information (manufacturer, model number) for the scale. Record this information.

4) Obtain the manufacturer information (manufacturer, model number) for the concrete mixer. Record this information.

5) Record the material information for the materials used in the concrete mix (gravel, sand, and cement mix).

Lab Report1) In a table, display the actual amount of material used and the theoretical (calculated) amount of material used.

2) What is the initial slump test value?

3) What is the revised slump test value?

4) Why the difference in the slump test?

a) 5) What does the slump test tell you about the concrete that your group has just designed and mixed?

b) Will it be suitable for most engineering applications? Why or why not?

Appendix1) Show your calculations for determining the materials needed for the 0.2 ft3 concrete beam.

2) Show your calculations for the Pre-Lab (if you have not already completed it).

3) Lab 5: Slump Test Laboratory (see this Lab)

Report Discussion Questions (Post-Lab Questions):1) Did the concrete pass the slump test as originally tested? Why or why not?

2) Did the concrete pass the slump test once the mix was altered? Why or why not?

3) If the concrete does not slump, then what changes need to be made to the concrete mix? Answer in complete sentences.

4) If the concrete does slump too much, then what changes need to be made to the concrete mix? Answer in complete sentences.

5) Should you, as an engineer, use a pre-mixed bag of concrete in an engineering application? Why or why not?

Follow the steps as specified in the CVEN 3121 Laboratory Manual Lab Report Format section.

Refer to the Class Syllabus for information on how to properly cite references and display tables and figures.