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Anonymous users2024-02-07Concrete specimens are the most direct basis for judging the concrete strength of engineering structures, so the quality of concrete specimens is very important. The producer of the concrete specimen must have a rigorous, scientific and fair working attitude. When the concrete specimen is made, the first is sampling, and the sampling part must be randomly sampled at the concrete pouring site (the part where the concrete is dumped or vibrate), and the sample cannot be taken directly from the mixer or mixer truck, so as to ensure that the concrete specimen is relatively close to the state when the concrete enters the mold.
Sampling requires each group of specimens to be taken at one time, and cannot be taken several times in a group. Then it is the mold loading, when the concrete is loaded into the specimen mold, it is required to be divided into three times according to the size of the specimen mold and the layered vibrating is completed, and the concrete that requires the mold can not be added with cement, sand and gravel and other materials. Then is the vibration, requires the use of small mechanical vibration machine vibration, if there is no steel bar that can be used 12 for insertion, each layer of insertion about 16 times, divided into 3 times to the mold filled.
The sampling of concrete has been clearly stipulated in the construction specification and is not described here. Finally, after the molding of the sealing sample, after the concrete specimen mold is removed, the concrete specimen should be marked on the concrete specimen in accordance with the concrete pouring position, the specimen production time, the concrete strength grade, etc., and the specimen number should be carried out to prevent loss or confusion. After the number of the concrete specimen, because in accordance with the curing conditions of the concrete specimen in a timely manner for different conditions of maintenance, the concrete curing time meets the inspection requirements because of the timely inspection test of the concrete strength value.
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Anonymous users2024-02-06Check the concrete mold test before use, and carry out it according to the specifications and standards of the concrete test block parts!
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Anonymous users2024-02-051.Preparation work, mold trial preparation: the first thing is to clean up the mold trial, if it is not clean, it will affect the quality of the overall concrete.
Then the inner surface is evenly brushed with the coating agent, which can also be replaced by waste engine oil. It is also an essential step. 2. Put a piece of tissue paper on the bottom hole, which is for convenience when defilming with a compressor.
If there is no layer of tissue paper, it is easy to form when demolding, or it is laborious to imitate the demoulding. Cause halfway prosperity and waste. 3. Use an iron shovel to connect the concrete from the mouth of the tanker that is being discharged, and put it into the mold little by little, and pay attention to the 1 3 of the overall space for each mold, and then vibrate with an iron rod appropriately to make the material flat.
And so on until it is done. 4. The last step is to put the installed test block in the curing box for maintenance. After the curing is completed, the production of the concrete test block is over.
Removal from the curing chamber is the final product. That's it.
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