Flow table test: Difference between revisions

Revision as of 09:30, 5 December 2015

Revision as of 19:11, 7 March 2016

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When fresh concrete is delivered to a site by a truck mixer, its consistency needs to be checked before it is poured into [[formwork]].

If consistency is not at the desired level, concrete will not have the required strength and other qualities once it has set. If concrete is too pasty, cavities may form within it. [[Rebar]] may become corrededcorroded, and concrete will crack. Cavities will also lowerreduce the level of stress concrete can supportstrength.

==Equipment==

* Flow table with a grip and a hinge, {{convert|70|cm|in}} square. In the American version of this test, the the table is {{convert|10|in|cm}} diameter per {{Citation |title=ASTM C 230|url=http://www.astm.org/Standards/C230.htm}}.

* Abrams cone, open at the top and at the bottom - {{convert|30|cm|in}} high, {{convert|17|cm|in}} top diameter, {{convert|25|cm|in}} base diameter.

* Water bucket and broom to wet the flow table.

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==Links and Sources==

*DIN EN 12350-5

*{{Citation |title=ASTM C 1437 - 15|url=http://www.astm.org/Standards/C1437.htm}} Standard Test Method for Flow of Hydraulic Cement Mortar

*[http://www.b-i-m.de/lexikon/INHALT/ausbreitv.htm b-i-m] (German)

*[http://www.betontechnischedaten.de/Kapitel11/11_1.htm#Anchor2 Heidelberg Cement] (German)