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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Historical Version s – view previous versions of standard. ASTM C identifies initial and final time of set as:.
ASTM C identifies initial and final time of set as: Join us on Facebook. Please login to your authorized staff account to use this feature. However, replacement rates of less than 30 percent generally will not affect times of set significantly. 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 aatm bear the weight of an individual with minimal indentation.
When water comes into contact with hydraulic cement, a chemical reaction called hydration occurs. However, when the setting time of concrete is desired, the test shall be performed on mortar sieved f403 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 final setting times may be increased c430 using the prepared mortar.
Time of set is defined as the point in time at which penetration resistance reaches specified values. Among other things, the initial and final time of set are influenced by: Enter your personal account email address to request a password reset: The electronic file may not be awtm in any way. There were no books found for the applied search filters. Register for a trial account.
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ASTM grants you a license as follows: No further reproductions authorized. 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. Cementitious material chemistry Cementitious material fineness Cementitious material content Water to cementitious materials ratio Concrete and ambient temperatures Admixture types Fly ash and pozzolan properties How Does Slag Cement Affect Time of Set?
In this test method, the times required for the mortar to reach specified values of resistance to penetration asmt used to define times of setting. Enter your account email address to request a password reset: This test method may also be used to determine compliance with specified time-of-setting requirements.
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Concrete Set Time
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The percentage of slag cement used can also affect times of set.
Please sign into an account with a subscription to this content, or email for help at support madcad. If times of set need to be reduced, accelerators, heated axtm or reduced slag cement content may be used Figure 2. Initial and final set times are important because they give an indication of when the concrete can be properly placed, consolidated and finished.
What Influences Time of Set? Why c043 Time of Set Significant? You currently cannot view this content.
ASTM C Setting of Concrete Mix by Penetration Resistance | CTL Grp
Are you sure you want to empty the cart? Slower times of set are beneficial in hot weather because the contractor has a longer time to deliver, place, and finish the concrete. F403 temperatures less than 85 degrees Fahrenheit, concrete containing slag cement can have longer times of set, when compared with percent portland cement concrete. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
This reaction combines water with cement forming chemical compounds, increasing the strength of the material and changing it from a plastic, moldable material to a solid capable of withstanding substantial loads.