Precautions for import and export commodity inspection and air forwarder

In international trade, the indirect and local inspection of import and export commodities is closely related to the vital interests of buyers and sellers, as it involves inspection rights, inspection agencies and related claims.…

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Precautions during use of superplasticizer additive

After the pce superplasticizer is added to the cement, the sodium aluminate and sodium carbonate in its main components react rapidly with the gypsum in the cement to form sodium sulfate in the alkaline solution, so that the gypsum loses its original…

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Construction Precautions for Foam Lightweight Soil

The filling elevation of the foam light soil with different strengths shall be constructed in strict accordance with the design requirements. The anti-seepage geomembrane on the top of the foam light soil subgrade shall be laid under the metal mesh,…

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Precautions for the use of concrete foaming agent

Cement foaming agent is called foamed concrete foaming agent. It refers to an admixture that can reduce the surface tension of liquid and produce a large amount of uniform and stable foam. It is an admixture used to produce foamed concrete and can pr…

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Precautions for the use of the angular contact thrust bearing and how to maintain the bearing to extend its service life

How to judge the angular contact thrust bearing failure A sound meter is used to check the size and sound quality of the rolling sound of the angular contact thrust bearing in operation. Even if the bearing is slightly damaged such as peeling, abnorm…

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Do you knnow amorphous graphite?

Amorphous graphite is usually formed by contact metamorphism of anthracite coal seams with metamorphic agents (e.g. tectonic stress, magma, etc.).…

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The two kinds of cement foaming agents

Cement foaming agent refers two kinds: plant cement foaming agent and polymer foaming agent.…

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