CVEN 3400 – Structural Testing Laboratory Lab 7: Lightweight Concrete Mix Design Laboratory Assignment

Procedure1) Follow the lightweight concrete mix design procedures from one of the online resources that Iprovide below:

Read over the following 4 documents:

http://www.fhwa.dot.gov/everydaycounts/technology/bridges/pbeswebinartraining/s4_m10.cfmU.S. Department of Transportation Federal Highway Administration (FHWA) Prefabricated Bridge Elements and Systems Lightweight Concrete Benefits for PBES Deployment by Reid W. Castrodale, PhD, PE, Carolina Stalite Company, Salisbury, NC

http://www.norliteagg.com/structuralconcrete/mix_designs.aspNorlite Lightweight Aggregate: Mix Designs: Structural Concrete

http://theconstructor.org/concrete/design-of-lightweight-aggregate-concrete/6734/The Constructor: Design of Lightweight Aggregate Concrete

http://www.schundler.com/mixdesigns.htmThe Schundler Company Construction Guide: Lightweight Concrete Mix Designs

How will you alter the procedures applied in the normal concrete mix design to account for the lightweight aggregate used in the lightweight concrete mix design?

Review the following report:

http://www.ltrc.lsu.edu/pdf/2006/old_reports/Report%20033.pdfDurability of Lightweight Concrete, Phase I -- Concrete Temperature Study, H.R. Rushing, 61-8C, August 1968 (Louisiana Transportation Research Center)

2) Obtain the manufacturer information (manufacturer, model number) for the scale. Record thisinformation.

3) Obtain the manufacturer information (manufacturer, model number) for the concrete mixer. Recordthis information.

4) Record the material information for the materials used in the concrete mix.

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

2) What is the initial slump test value?

3) What is the revised slump test value?

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

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

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

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

4) If the lightweight 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 lightweight concrete in an engineering application? Why or why not?

6) Why would you use a lightweight concrete instead of a normal concrete? Provide at least 3 reasonsin complete sentences.

7) In what applications would you NOT use a lightweight concrete?

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.