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Regular concrete
TEXT 2. TYPES OF CONCRETE J. The most common types of admixtures are accelerators, retarders, air-entrainers, plasticisers, pigments, corrosion inhibitors, bonding agents. I. Chemical admixtures give concrete certain characteristics not obtainable with plain concrete mixes. H. The water and cement paste hardens and develops strength over time. D. Recycled aggregates are used as partial replacements of natural aggregates.
Ex.13. Write down the key sentences from the text: 1. 2. 3. …
Ex. 14. Summerise the text. Use the key sentences from the previous exercise as a plan for your rendering.
For more specific information concerning building brick buildings read text 2 ‘TYPES OF CONCRETE’ and get ready to answer the questions following the text and the list of vocabulary.
Various types of concrete have been developed for specialist application and have become known by these names. Regular concrete is the lay term describing concrete that is produced by following the mixing instructions that are commonly published on packets of cement, typically using sand or other common material as the aggregate, and often mixed in improvised containers. This concrete can be produced to yield a varying strength from about 10 MPa to about 40 MPa, depending on the purpose, ranging from blinding to structural concrete respectively. Many types of pre-mixed concrete are available which include powdered cement mixed with an aggregate, needing only water.
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