Technical Questions

Question: Can fresh concrete be used around aluminum framing or in aluminum molds??

Question: What steps are taken in the repair of concrete structures?

Question: How does the relative amount of each ingredient used in concrete influence the properties of con...

Question: What are shrinkage-compensating expansive cement and concrete?

Question: How should the concrete be consolidated to obtain a complete filling of the forms and around the...

Question: Are epoxy resins widely used in concrete construction and repair?

Question: Heat of hydration and the importance of controlling it

Question: Would adding more cement serve the purpose of admixtures?

Question: Air tests for non-air-entrained concrete

Question: What does a pozzolan do in the concrete?

Question: The effect of aggregate shape on concrete strength

Question: How is the required strength selected, measured, and obtained?

Question: The effect of aggregate grading on concrete strength

Question: When should saw cuts be made on a concrete slab?

Question: How can the effectiveness of curing be measured?

Question: How should samples of freshly mixed concrete be taken in the field to provide information on con...

Question: What are the primary benefits of using fiber-reinforced concrete compared to traditionally reinf...

Question: Why is consolidation needed?

Question: How to Control Mass Concrete Temperature during Construction

Question: Minimum concrete cover for balconies with PT cables

Question: Are there any challenges or common issues encountered during the testing of fiber-reinforced con...

Question: Size of test cylinder

Question: The importance of reinforcement in concrete

Question: What is meant by properly cured concrete?

Question: What methods are commonly used to ensure sufficient moisture for curing concrete?

Question: Increasing the load capacity of a slab-on-ground using an overlay

Question: Alternative methods for measuring crack width

Question: Are retarding admixtures reliable as to the time of setting?

Question: How are properties of concrete in the structure measured?

Question: Why are many non-destructive tests used as “estimators” of concrete strength?

Question: Popouts or popoffs?

Question: Why use fiber-reinforced concrete?

Question: Using cube tests in lieu of cylinder tests

Question: Knowledge of concrete properties

Question: Factors affecting permeability

Question: Epoxy-coated reinforcement

Question: Aggregate classification by density

Question: What methods are used for protecting concrete against low temperatures?

Question: Painting the floor

Question: Are pozzolans all alike?

Question: What is curing?

Question: Curing Cylinders for Acceptance Testing

Question: What is an admixture?

Question: Tolerances for floors supporting operable partitions

Question: How do fibers work?

Question: The importance of proper drainage

Question: Precautions to resist acid attack

Question: When is the slump test useful in detecting changes in the concrete?

Question: What test conditions affect the results of compressive strength tests of concrete?

Question: Air content common limits

Question: How are the relatively small dosages of an admixture measured reliably and placed in the mixer?

Question: Low-strength cylinder test results

Question: Will concrete continue to increase in strength if there is no moisture present?

Question: Is there any measure of the completeness or adequacy of curing?

Question: Difference between a contraction joint, isolation joint, expansion joint, construction joint, an...

Question: Joint deterioration mechanism and prevention

Question: Can you use any source of water as mixing water?

Question: What factors affect the mixing time?

Question: What are the ultrasonic pulse velocity and the pulse echo tests?

Question: Shear reinforcement for beam-column connections

Question: False and flash set

Question: The purpose of calcium sulfate (gypsum)

Question: Notable changes in modern portland cement properties

Question: What procedure should be followed for standard curing of specimens for strength tests?

Question: Chloride concentration in soil and exposure classes

Question: Standard specifications for cements

Question: The making of portland cement

Question: If the paste is ample in amount, but is too thin and watery to float the aggregate particles, wh...

Question: The cause of false set

Question: Are there data relating w/cm to flexural strength that are as reliable as those for compressive ...

Question: Can you have too much paste or mortar?

Question: What tests are necessary or desirable in making a series of trial mixtures to arrive at a suitab...

Question: Can trial mixtures be made with full-size batches at the start of a job?

Question: What other uses are there for the pulse velocity?

Question: How can the adequacy of mixing be determined?

Question: Does the method of molding test specimens affect the test results?

Question: Cleaning slabs during tilt-up construction

Question: What irregularities are to be avoided in the test specimen?