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According to GB/T 1346-2011 “Standard Consistency Water Consumption, Setting Time, Stability Test Method Standard of Cement”, the specimen will be taken out of the maintenance for a period of time, and the test needle will be vertically immersed into the mortar body to be tested by Vickers instrument, and it will be proved to reach the initial solidification time when the test needle is immersed into the floor at a distance of 4 mm ± 1 mm. When the circular test needle sinks into the sample 0.5 mm, it is proved that the final setting time is reached.
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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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