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How to identify cement mixing station is good or bad?
Time:2016-06-14        Pageview:13

How to identify the quality of cement concrete mixing station is the key.
The cement quality is directly related to the quality of construction is extremely durable, it is the key link of the quality control of mixing station! The cement industry is now a mess: clinker unqualified is commonplace, cement clinker content far below the standard value is the norm, "small cement" fundamental cannot be called cement, only call for abrasive powder. Serious lack of cement regulation! Test strength, setting time and stability are not enough.
1, clinker: standard, calcium silicate minerals are not less than 66%, calcium oxide and silicon oxide mass ratio of not less than 2. Can our cement plant these indicators often qualified?! Often only strength test.
2, the content of clinker in cement: standard, ordinary portland cement clinker + gypsum content should be greater than or equal to 80%, and less than 95%. But now, even the large cement clinker content generally only 65% - 70%, not to mention all over the surrounding streets of small cement plants! (actually can only be called grinding station, also don't know how to obtain the name of the cement factory), the understanding, the general small cement clinker content are only 50% or so. Small cement can not be called cement, at best, can be called a mixture of!
3, detection means: Cement by the Technical Supervision Bureau supervision and management, sampling once a year, can not be bound to the production of cement plant! National inspection standards will test the project only strength, setting time and stability, coupled with some chemical indicators, has been far from enough! The small cement that has done hands and feet is very easy to meet these indexes!
We should be strict testing of clinker, in the acceptance of cement should increase the clinker content detection, should not only detect the strength, setting time and soundness, of course, magnesium oxide, sulfur trioxide and other chemical indicators no less!

 

 
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