ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

slump test for fresh concrete

Updated on December 13, 2012

Slump test

Slump test is one of fresh concrete tests. Slump test is made to measure the consistency of fresh concrete mix , It's the most commonly used all over the world according to (ASTM c143-78) . The main purpose of measuring consistency by slump test is to achieve acceptable fresh concrete workability.

Also slump test is one of the simple and important tests which helps us to get a homogenous fresh concrete mix before casting.

Slump test has a direct effect on compressive strength of the hardened concrete as slump test shows the water/cementing material ratio. In other words, when slump is big then water/cement ratio is big and the compressive strength of concrete is low.

Factors effect on fresh concrete consistency

Concrete components ratios: water, coarse aggregate, fine aggregate and cement.
Cement fineness (cement surface area): slump is directly proportional to cement surface area.
Maximum nominal size of coarse aggregate: when maximum nominal size increases, slump will also increase.
Time between finishing mixing and making slump test: slump decreases when that time increases.
Air temperature: slump decreases when air temperature increases due to evaporation of mixing water.
Admixtures: admixtures are used to improve fresh concrete consistency with different degrees. The most important admixture is Superplasticizers which added to concrete mix by (1-3) % of cement weight.

The purpose of slump test

Define the consistency of concrete mix by measuring the slump after deformed as a frustum cone in the site or laboratory to assure that the concrete mix components ratios are accurate. It is the simplest test to achieve concrete quality control in mixing stations and in the sites.

The instruments

* Frustum cone made of strong metal with 1.5mm thickness at least, opened from above and down, the above hole has 10cm diameter and the down hole has 20cm diameter. The cone height is 30cm.
* Compacting steel bar with 15mm diameter and 60cm height.

Slump test instruments

Steps of slump test

1- Make sure that all instruments are clean.
2- Fill the cone with concrete to 3 layers, every layer is 1/3 the cone.
3- Compact every layer by 25 times by using the compacting bar with equal way then, surface is resolved.
4-Raise the cone vertically slowly without any lateral or torsional movement.
5-All this steps must be done in 150 second without stopping.
6-Measure the slump for the concrete by standard ruler.


The slump = The height of the coneThe height of the concrete cone after the slump.
*Slump value of this concrete will be compared with the acceptable values which the CODE mentioned.

You can get more information about the limits of slump test and other Concrete Workability Test Methods,


    0 of 8192 characters used
    Post Comment

    • profile image

      Himanshu Bisht 

      3 years ago

      Pls tell me what value of slump should come for different grade of concrete ..

    • profile image


      5 years ago


    • profile image

      Cement Product Admixture 

      6 years ago

      Define the consistency of concrete mix by measuring the slump after deformed as a frustum cone in the site or laboratory to assure that the concrete mix components ratios are accurate.

    • profile image


      7 years ago

      pls give the values of slump test results should be

    • sathimanoj profile image

      Manoj Balakrishnan 

      8 years ago from Abu Dhabi

      See more about concrete admixtures in my hub


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)