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The high efficiency water reducer is a kind of concrete additive with main ingredient of naphthalene sulfonate formaldehyde condensate. It is non-air-entraining high efficiency water reducer. This product is used in the concrete for its high water reducing performance and workability that can increase the fluidity of the mixture, save the cement and lower the cost. It is an integral part in the modern high efficiency concrete, pump-fed concrete and common concrete.
Technical performance:
1) It has high water reducing and strengthening performance. When its quantity is 0.5-1%, the water reducing rate is up to 10-15%. Its 3d compression strength can increase by 50-80% and its 28d compression strength can increase by 25-60%. Meanwhile, its tensile strength also increases;
2) If it is used when water is nor reduced, it can increase the concrete slump from 3 cm to above 15-25 cm;
3) After this product is added, the concrete抯 mechanical properties (anti-permeability, freeze-thaw resistance, creep and elastic modulus etc.) are improved greatly;
4) This product doesn抰 rust the reinforcing steel bar.

     Specifications:
 

 Item

FDN-I

FDN-II

 Appearance  

Dark brown powder

Dark brown powder

Cement grout fluidity(mm) ≥

220

235

pH (1% water solution) 

7-9

7-9

Diameter (60-mesh residue) % ≤

15

15

Water content (%) ≤

10

10

Sodium sulfate content (%) ≤

17

5

Item

GB8076-97 Grade 1

FDN-I 

FDN-II

Water-reducing rate (%)

≥12

20

27

Ratio of bleeding rate (%)

≤90

70

60

Air content (%)

≤3.0

2

2.5


Compressive strength ratio (%)

 

1d

≥140

146

150

3d

≥130

152

176

7d

≥125

160

165

28d

≥120

158

160

Applicable scope:

1) It is appealable to various cements.
2) It is suitable to mix with early-strength, high strength, high anti-permeability, high durability concrete.
3) With low sodium sulfate content, it can mix with various compound additive agents.
4) It is applicable to self-cured and steam-cured prefabricated part. It can shorten the maintenance time to reach the demould strength in advance. 5) This product is applicable to the prefabricated part of high-strength concrete and the site construction.

 

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