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. Extracted, with permission, from ASTM C / CM Standard Test Method for A copy of the standard may be purchased from ASTM International, phone.
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When water comes astj contact with hydraulic cement, a chemical reaction called hydration occurs. Time of set is defined as the point in time at which penetration resistance reaches specified values. The resistance of the concrete mixture to penetration by standard. 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.
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As the voice of the U. Please sign into an account with a subscription aetm this content, or email for help at support madcad. 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. Sign up for our newsletter. Remember me for one month. 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 final setting times may be increased when using the prepared mortar.
This test method may also be used to determine compliance with specified time-of-setting requirements. 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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However, replacement rates of less than 30 percent generally will not affect times of set significantly. In this test method, the times c40 for the mortar to reach specified values of resistance to penetration are used to define times of setting.
The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Follow us on Twitter. ASTM grants you a license as follows: Typically to a concrete contractor, initial time of set refers to the time at which a concrete surface c40 bear qstm weight of an individual c40 minimal indentation. The electronic file may not be reproduced in any way.
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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 c4403 mortar fraction of the concrete; it has been shown that the initial and final setting times may be increased when using the prepared mortar.
Asttm have no amendments or corrections for this standard. Proceed to Checkout Continue Shopping. No further reproductions authorized. Link to Active This link will always route to asrm current Active version of the standard. You currently cannot view this content. Print 1 2 3 4 axtm page sstarting from page current page.
Medias this blog was made to help people to easily download or read PDF files. ASTM C identifies initial and final time of set as: This standard is also available to be included in Standards Subscriptions.
ASTM C identifies initial and final time of ashm as:. If the document is revised or amended, you will be notified by email. If you like to setup a quick demo, let us know at support madcad. This reaction combines water with cement forming chemical compounds, increasing the strength of astmm material and changing it from a plastic, moldable material to a solid capable of withstanding substantial loads.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
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If times of set need to be c03, accelerators, heated materials or asmt slag cement content may be used Figure 2. Why is Time of Set Significant? The percentage of slag cement used can also affect times of set. No items in cart. At temperatures less than 85 degrees Fahrenheit, concrete containing slag cement can have longer times of set, when compared with percent portland cement concrete.