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- Water–cement_ratio abstract "The water–cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix. A lower ratio leads to higher strength and durability, but may make the mix difficult to work with and form. Workability can be resolved with the use of plasticizers or super-plasticizers.Often, the ratio refers to the ratio of water to cement plus pozzolan ratio, w/(c+p). The pozzolan is typically a fly ash, or blast furnace slag. It can include a number of other materials, such as silica fume, rice husk ash or natural pozzolans. Pozzolans can be added to strengthen concrete.The notion of water–cement ratio was first developed by Duff A. Abrams and published in 1918. Refer to concrete slump test.Concrete hardens as a result of the chemical reaction between cement and water (known as hydration, this produces heat and is called the heat of hydration). For every pound (or kilogram or any unit of weight) of cement, about 0.42 pounds (or 0.42 kg or corresponding unit) of water is needed to fully complete hydration reactions.However, a mix with a ratio of 0.42 may not mix thoroughly, and may not flow well enough to be placed. More water is therefore used than is technically necessary to react with cement. Water-cement ratios of 0.45 to 0.60 are more typically used. For higher-strength concrete, lower ratios are used, along with a plasticizer to increase flowability.Too much water will result in segregation of the sand and aggregate components from the cement paste. Also, water that is not consumed by the hydration reaction may leave concrete as it hardens, resulting in microscopic pores (bleeding) that will reduce final strength of concrete. A mix with too much water will experience more shrinkage as excess water leaves, resulting in internal cracks and visible fractures (particularly around inside corners), which again will reduce the final strength.The 1997 Uniform Building Code specifies a maximum of 0.50 ratio when concrete is exposed to freezing and thawing in a moist condition or to de-icing chemicals, and a maximum of 0.45 ratio for concrete in a severe or very severe sulfate condition.".
- Water–cement_ratio wikiPageID "4594861".
- Water–cement_ratio wikiPageLength "2450".
- Water–cement_ratio wikiPageOutDegree "16".
- Water–cement_ratio wikiPageRevisionID "689347449".
- Water–cement_ratio wikiPageWikiLink Blast_furnace.
- Water–cement_ratio wikiPageWikiLink Category:Cement.
- Water–cement_ratio wikiPageWikiLink Category:Concrete.
- Water–cement_ratio wikiPageWikiLink Category:Engineering_ratios.
- Water–cement_ratio wikiPageWikiLink Cement.
- Water–cement_ratio wikiPageWikiLink Concrete.
- Water–cement_ratio wikiPageWikiLink Concrete_slump_test.
- Water–cement_ratio wikiPageWikiLink Duff_Abrams.
- Water–cement_ratio wikiPageWikiLink Fly_ash.
- Water–cement_ratio wikiPageWikiLink Hydration_reaction.
- Water–cement_ratio wikiPageWikiLink Plasticizer.
- Water–cement_ratio wikiPageWikiLink Pozzolan.
- Water–cement_ratio wikiPageWikiLink Segregation_in_concrete.
- Water–cement_ratio wikiPageWikiLink Slag.
- Water–cement_ratio wikiPageWikiLink Superplasticizer.
- Water–cement_ratio wikiPageWikiLink Uniform_Building_Code.
- Water–cement_ratio wikiPageWikiLinkText "Water–cement ratio".
- Water–cement_ratio wikiPageUsesTemplate Template:ConcreteNavigationBox.
- Water–cement_ratio wikiPageUsesTemplate Template:Unreferenced.
- Water–cement_ratio subject Category:Cement.
- Water–cement_ratio subject Category:Concrete.
- Water–cement_ratio subject Category:Engineering_ratios.
- Water–cement_ratio hypernym Ratio.
- Water–cement_ratio type Concept.
- Water–cement_ratio type Ratio.
- Water–cement_ratio type Redirect.
- Water–cement_ratio comment "The water–cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix. A lower ratio leads to higher strength and durability, but may make the mix difficult to work with and form. Workability can be resolved with the use of plasticizers or super-plasticizers.Often, the ratio refers to the ratio of water to cement plus pozzolan ratio, w/(c+p). The pozzolan is typically a fly ash, or blast furnace slag.".
- Water–cement_ratio label "Water–cement ratio".
- Water–cement_ratio sameAs Q1413436.
- Water–cement_ratio sameAs Vodní_součinitel.
- Water–cement_ratio sameAs Wasserzementwert.
- Water–cement_ratio sameAs Relación_agua-cemento.
- Water–cement_ratio sameAs cementfactor.
- Water–cement_ratio sameAs m.0cbpc2.
- Water–cement_ratio sameAs Vattencementtalet.
- Water–cement_ratio sameAs Q1413436.
- Water–cement_ratio wasDerivedFrom Water–cement_ratio?oldid=689347449.
- Water–cement_ratio isPrimaryTopicOf Water–cement_ratio.