1 Jan Buy ASTM C /CM: TEST METHOD FOR TIME OF SETTING OF CONCRETE MIXTURES BY PENETRATION RESISTANCE from. Time of Setting of Concrete Mixtures by Penetration Resistance. Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance. The resistance of the concrete mixture to penetration by standard.
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Link to Active This link will always route to the current Active version of the standard. What Influences Time of Set?
Time of set is defined as the point in time at which penetration resistance reaches specified values. Typically to a concrete contractor, initial time of set refers to the time at which a concrete surface can bear the weight of an individual with minimal indentation. Sign up for our newsletter.
If times of set need to be reduced, accelerators, heated materials or reduced slag cement content may be used Figure 2. Enter your personal account email address to request a password reset: The electronic file may not be reproduced in any way.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. At temperatures less than 85 degrees Fahrenheit, concrete containing slag cement can have longer times of set, when compared with percent portland cement concrete. Combining values from the two systems asstm result in non-conformance with the standard. No items in cart. Please sign into an account with a subscription to this content, or email for help at support madcad.
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Print 1 2 3 4 5 page sstarting from page current page.
However, when the setting time of concrete is desired, the test shall be performed on mortar sieved from the concrete mixture and not on a prepared mortar intended to simulate the mortar fraction of the concrete; it has been shown that the initial and satm setting times may be increased when using the prepared mortar.
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The percentage of slag cement used can also affect times of set. Cementitious material chemistry Cementitious material fineness Cementitious material content Water to cementitious v403 ratio Concrete and ambient temperatures Admixture types Fly ash and pozzolan properties How Does Slag Cement Affect Time of Set?
Initial and final set times are important because they give an indication of when the concrete can be properly placed, consolidated and finished. In this test method, the times required for the mortar to reach specified values of resistance to penetration are used to define times of setting. ASTM grants you a license as follows: If you like to setup a quick demo, let us know at support madcad. When water comes into contact with hydraulic cement, a chemical reaction called hydration occurs.
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ASTM C Setting of Concrete Mix by Penetration Resistance | CTL Grp
This reaction combines water with cement forming chemical compounds, increasing the strength of the material and changing astmm from a plastic, moldable material to a solid capable of withstanding substantial loads.
ASTM C identifies initial and final time of set as: You currently cannot view this content. Why is Time of Set Significant? Register for a trial account.
However, replacement rates of less than 30 percent generally will not affect times of set significantly. Remember me for one month. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Search book title Enter keywords for book title search. Atm test method may also be used to determine compliance with specified time-of-setting requirements.
Follow us on Twitter. Slower times of set are beneficial in hot weather because the contractor has a longer time to deliver, place, and finish the concrete. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Among other things, the initial and final time of set are influenced by: Content only available by subscription.
Measurement of setting time
ASTM C identifies initial and final time of set as:. Enter your account email address to request a password reset: Join us on Facebook.
In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise. Historical Version s – view previous versions of ashm. Please login to your authorized staff account to use this feature. Penetration resistance Initial Time of Set psi Final Time of Set psi Typically to a concrete contractor, initial time of set refers to the time at which a concrete surface can bear the weight of an individual with minimal indentation.
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