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The difference between polycarboxylate and naphthalene superplasticizer.

2016-01-20 10:53:42 Clicks:

 

In the current market, naphthalene has launched for the market, only to be used in small projects, or be added for use in concrete. Next, small series is to introduce polycarboxylate and naphthalene water reducing the difference between.


Same as naphthalene, superplasticizer, polycarboxylate superplasticizer on cement adaptability problems is still exist. But compared to the naphthalene superplasticizer, in the use of different varieties of cement concrete and other components under the same conditions, the best dosage of naphthalene superplasticizer far, maximum difference of 20 ~ 40%. The optimal dosage of polycarboxylate superplasticizer is less, due to the high rate of polycarboxylate superplasticizer,. Polycarboxylic acid mother liquor water reducing effective  rate is as high as 40%, and naphthalene water reducing effective rate between 15% to 20%. In performance rate obviously has great advantage. In the synthesis of poly carboxylic acid and the use of more environmentally friendly, simple synthesis process. Naphthalene synthesis is energy consuming and pollution, the complexity of the production process.


Using poly carboxylic acid reducing agent workability of fresh concrete, nonstick, easier to vibration compacting; initial setting time faster more convenient plaster survival; faster growth in the early strength, demoulding strength. Poly carboxylic acid salt, reducing agent to fluctuations in the quality of raw materials, especially sand moisture fluctuation good adaptability, can obtain more stable concrete products.


From the economic perspective, through the selection of good adaptability to cement, can do the basic unit cost of concrete increase, or even slightly lower. If you consider saving steam maintenance costs and other factors, the use of polycarboxylate superplasticizer can obtain better economic benefits. Under normal circumstances, the use of polycarboxylate superplasticizer can save the cement concrete unilateral 30kg, 28 days of the concrete strength increased 5~10Mpa.

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