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Time of Setting of Concrete Mixtures by Penetration Resistance. ASTM Cpdf – Download as PDF File .pdf), Text File .txt) or read online. This standard is issued under the fixed designation C/CM; the number 1 This test method is under the jurisdiction of ASTM Committee C09 on.
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According to astm c403 experimental results, calcium aluminate type accelerators worked most effectively in controlling set and stiffening of shotcrete mortar. However, when the setting time of concrete is desired, the test astmm be performed astm c403 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.
In astm c403 test method, the times required for the mortar to reach specified values of resistance to penetration are used to define times of setting. Asmt control of set time is very important for astm c403 successful application of shotcrete in astm c403 construction site, because it determines key parameters such as capability to increase layer thickness and loss of the material caused by rebound of shotcrete.
However, there is no standard test procedure available to determine the set and stiffening process of shotcrete.
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The values stated in each system astm c403 not be exact equivalents; therefore, each system shall be used independently of the other. Referenced Documents purchase separately The documents astm c403 below are referenced within the subject standard but are not provided as part of the standard.
Set time astm c403 shotcrete is mainly driven by the use of a highly reactive set accelerator. X Add email address send.
Link to Active This link will always route to the current Active version of the standard. It was found that the penetration astm c403 test can wstm used astm c403 evaluate compatibility issues between the cement and the shotcrete accelerator.
Combining values from the two systems may result in non-conformance with the astm c403. Historical Version s – view previous versions of standard. This test method may also be used to determine compliance with specified time-of-setting requirements.
The set time of shotcrete can be determined using best fitted function using current set time criteria of 3. Various types of shotcrete accelerators and three different sources of portland cement have asgm used to investigate the set and stiffening process of shotcrete mortar. It is the responsibility of the user of astm c403 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.