Concrete Objectives

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At the end of the CONCRETE section, you should be able to ...

·         Identify the basic raw ingredients used to manufacture cement

·         Identify the four main chemical "compounds" in cement and explain what each contributes to the behavior of the fresh and hardened cement

·         List the five main types of cement and distinguish between them on the basis of their properties

·         Explain the terms "initial set" and "final set"

·         Distinguish between setting and hardening

·         Explain the primary purpose of the aggregate in normal-strength concrete

·         Summarize the procedures for performing a slump test and explain what the results signify

·         Explain the term “workability” as it applies to portland cement concrete

·         Explain the term “segregation” as it applies to portland cement concrete

·         Explain the term “bleeding” as it applies to portland cement concrete

·         Identify the factors that contribute to segregation and bleeding

·         Identify the properties of concrete affected by air content and explain why they are thus affected

·         Calculate air content, unit weight, and yield using the gravimetric method

·         Summarize the procedures for mixing, placing, and curing concrete cylinders

·         Identify the environmental factors needed for concrete to properly cure

·         List several methods for field curing concrete in a proper environment

·         Summarize the procedure for performing a compression test in the lab

·         Calculate compressive strength from laboratory compression test results

·         Identify the testing factors that affect measured concrete strength in the laboratory

·         Summarize the procedure for performing a splitting tensile test in the lab and reduce the data

·         Calculate tensile strength from laboratory split tension test results

·         Explain why "modulus of rupture" is not the same as "tensile strength"

·         Summarize the procedure for obtaining a stress-strain curve in the lab

·         Calculate elastic modulus from laboratory stress-strain results using the ASTM method

·         List the four fundamental objectives of concrete mix design

·         Explain the basic tenets of economical mix design and the rheological concepts behind them

·         Calculate, using the ACI volumetric method, a concrete mix design that will satisfy stated criteria

·         Adjust a concrete mix design to account for field moisture conditions

·         Identify the uses of accelerating, retarding, water reducing, and air entraining admixtures

·         Describe the pozzalanic reaction and explain how it affects concrete strength

·         Identify some of the potential uses of pozzalans

·         List several natural and artificial pozzalans and discuss what they have in common


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This site was last updated 02/14/09