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  2. Concrete sealer - Wikipedia

    en.wikipedia.org/wiki/Concrete_sealer

    Concrete sealers are applied to concrete to protect it from surface damage, corrosion, and staining. They either block the pores in the concrete to reduce absorption of water and salts or form an impermeable layer which prevents such materials from passing.

  3. Want a Patio? Try Stamped Concrete as a Low-Cost Alternative

    www.aol.com/news/2013-04-10-stamped-concrete...

    A stamped concrete patio costs $10-$15 per square foot, professionally installed. Here's a quick price comparison: Plain concrete: $6-$12 per sq. ft. ... the colorants may flake off over time ...

  4. Chipseal - Wikipedia

    en.wikipedia.org/wiki/Chipseal

    Chip seal products can be installed over gravel roads to eliminate the cost of grading, road roughness, dust, mud, and the cost of adding gravel lost from grading. Adding chip seal over gravel is about 25% of the price of resurfacing with asphalt, $170,000 for a 4-mile project done in Minnesota [6] compared to $760,000 had it been redone with ...

  5. Stamped concrete - Wikipedia

    en.wikipedia.org/wiki/Stamped_concrete

    The ability of stamped concrete to resemble other building materials makes stamped concrete a less expensive alternative to using those other authentic materials such as stone, slate or brick. [7] There are three procedures used in modern stamped concrete which distinguish it from other concrete procedures: the addition of a base color, the ...

  6. Creep and shrinkage of concrete - Wikipedia

    en.wikipedia.org/.../Creep_and_shrinkage_of_concrete

    Changes of pore water content due to drying or wetting processes cause significant volume changes of concrete in load-free specimens. They are called the shrinkage (typically causing strains between 0.0002 and 0.0005, and in low strength concretes even 0.0012) or swelling (< 0.00005 in normal concretes, < 0.00020 in high strength concretes).

  7. Estimator - Wikipedia

    en.wikipedia.org/wiki/Estimator

    In statistics, an estimator is a rule for calculating an estimate of a given quantity based on observed data: thus the rule (the estimator), the quantity of interest (the estimand) and its result (the estimate) are distinguished. [1] For example, the sample mean is a commonly used estimator of the population mean. There are point and interval ...