Concrete Technology FAQs

  • What is portland-limestone cement?

  • Are there different types of portland cement?

  • Can fibers replace wire mesh or welded wire fabric in a concrete slab on ground?

  • How are exposed-aggregate concrete finishes on concrete slabs produced?

  • How are exposed-aggregate concrete finishes produced?

  • How are fire resistance ratings for concrete determined?

  • How can I test for alkali-silica reactivity (ASR)?

  • How can you tell if you're getting the amount of concrete you're paying for?

  • How do I design for moisture sensitive floor coverings?

  • How do you control the strength of concrete?

  • How do you protect a concrete surface from aggressive materials like acids?

  • How do you remove stains from concrete?

  • How is portland cement made?

  • How is white cement different and why is it used in decorative concrete?

  • Is there a universal international specification for portland cement?

  • Joints: What type are used and where?

  • On what basis is air content for concrete specified?

  • We are planning to build a concrete countertop. Can you tell me which type of cement to use for this application? I’ve heard that Type II is best.

  • What are recommended mix proportions for good concrete?

  • What are the decorative finishes that can be applied to concrete surfaces?

  • What are the most common tests for fresh concrete?

  • What are Type I/II or Type II/V cements?

  • What causes efflorescence and how can it be avoided?

  • What does 28-day strength mean?

  • What does it mean to "cure" concrete?

  • What is 3,000 pound concrete?

  • What is air-entrained concrete?

  • What is alkali-silica reactivity (ASR)?

  • What is ettringite and does it or the sulfate in cement contribute to expansion and disintegration of portland cement concrete?

  • What is self-consolidating concrete (SCC) and how is it tested?

  • What is the difference between cement and concrete?

  • What is the moisture content of concrete?

  • What should be considered when choosing a curing method for slabs that will receive a moisture sensitive floor covering?

  • Why do concrete surfaces flake and spall?

  • Why does concrete crack?

  • Why test concrete?

  • Will concrete harden under water?