Flow table test

Flow table test

thumb|300px|... and the concrete flows. After this you have to measure the diameter with a folding meter stick">
These images show a flow test with very fluid concrete for a special application which made compression impossible.

The flow table test or flow test is a method to determine the consistence of fresh concrete.

Application

When fresh concrete is delivered to a site by a truck mixer it is sometimes necessary to check its consistence before pouring it into the formwork.

If the consistence is not all right, the concrete won't have the desired quality - in particular not the desired strength.

During the conduction the site engineer should be around.

If the concrete is too pasty this might result in cavities inside the hard concrete which leads to corrosion of the rebar, which again leads cracks which will accelerate the whole process - just like few concrete cover. Cavities will also lower the stress the concrete part is able to support.

Equipment

* Flow table with a grip and a hinge - 70 cm x 70 cm
* upside down funnel which is open at the top and at the bottom - 20cm high, 13 cm top diameter, 20cm base diameter
* water bucket and broom for wetting the flow table

Conduct

* The flowtable is wettened
* The upside down funnel is filled up with fresh concrete
* The upside down funnel is lifted up and the concrete flows
* The flowtable will be lifted up several centimeters and will be dropped. These commotions will make the condrete flow a little bit further.
* After this the diameter of the concrete is measured with a yardstick. The result is called "Ausbreitmaß" in German.

Links and Sources

*DIN EN 12350-5
* [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)
* [http://www.controls.it/products.php?code=43&page=Workability_&_consistency&product=61&prod_name=Flow_table Concrete Flow Table in an online shop]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Tilt table test — A tilt table test is a medical procedure often used to diagnose dysautonomia or syncope. Patients with symptoms of dizziness or lightheadedness, with or without a loss of consciousness (fainting), suspected to be associated with a drop in blood… …   Wikipedia

  • flow table — noun : a device for measuring the consistency of freshly made concrete or mortar consisting of a table top that can be raised and dropped and a mold for shaping the test specimen compare flow II 5b …   Useful english dictionary

  • Concrete slump test — A tester performing a concrete slump test. The concrete slump test is used for the measurement of a property of fresh concrete. The test is an emprical test that measures the workability of fresh concrete. More specifically, it measures the… …   Wikipedia

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • Control flow — Not to be confused with Flow control. In computer science, control flow (or alternatively, flow of control) refers to the order in which the individual statements, instructions, or function calls of an imperative or a declarative program are… …   Wikipedia

  • Control table — This simple control table directs program flow according to the value of the single input variable. Each table entry holds a possible input value to be tested for equality (implied) and a relevant subroutine to perform in the action column. The… …   Wikipedia

  • Power-on self-test — (POST) is the common term for a computer, router or printer s pre boot sequence. The same basic sequence is present on all computer architectures. It is the first step of the more general process called initial program load (IPL), booting, or… …   Wikipedia

  • deformation and flow — Alteration in size or shape of a body under the influence of mechanical forces. Flow is a change in deformation that continues as long as the force is applied. Gases and liquids normally flow relatively freely, while solids deform when subjected… …   Universalium

  • 5. THE TABLE (al-Ma'idah) — In the name of God, the Gracious, the Merciful. 1. O you who believe! Fulfill your commitments. Livestock animals are permitted for you, except those specified to you; but not wild game while you are in pilgrim sanctity. God decrees whatever He… …   Quran. Talal Itani translate

  • Duplicate Address Test — IPv6 im TCP/IP‑Protokollstapel: Anwendung HTTP IMAP SMTP DNS … Transport TCP UDP …   Deutsch Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”