I. Product Introduction
This FDN concrete water reducer is a non-air-entraining with β-naphthalenesulfonate sodium formaldehyde high-condensation polymer as the main component. It has no retardation, no air-entrainment, good compactness, and can reduce the water-cement ratio and greatly to improve the early and late strength of concrete, it can be used to prepare high-performance concrete and ready-mixed concrete with high fluidity, high strength and high impermeability.
II. Product performance
1. The FDN concrete water reducer has obvious water-reducing and dispersing effect, with a water-reducing rate of 18%-28%, which can improve the fluidity of cement paste and concrete mixture under the condition of low water-cement ratio.
2. When keeping the water-cement ratio constant, it can greatly improve the workability of concrete, improve the fluidity of the concrete without bleeding segregation, improve the binding force between the steel bar and the concrete, and make the surface of the concrete smooth.
3. Under the condition of keeping the original strength unchanged, when the powder is mixed with 0.5%-1.2% of the cement amount, it can save 15%-25% of the cement.
4. The FDN concrete water reducer has obvious early strength and strengthening effect. The powder is mixed with cement from 0.25% to 1.5%. Under the same cement dosage and slump conditions, the strength of concrete per day is increased by 50%-- 120%, 3-day strength increased by 40%-100%, 7-day strength increased by 30%-80%, 28-day strength increased by 25%-75%, and the later strength continued to increase.
5. The FDN concrete water reducer is not retarded, air-entraining, and has a wide range of adaptability to cement. It can improve the physical and mechanical properties of concrete, reduce the heat of hydration of cement, and obviously improve the impermeability of concrete, without affecting the drying shrinkage of concrete.
6. This product can be used to prepare C80 high-strength concrete with a slump of 5 cm-7 cm, and C60 high-strength concrete with a slump of 18 cm-20 cm.
7. High-durability concrete, impermeable concrete, and micro-foaming agent can be used in combination, high-resistance freeze-thaw concrete can be made, concrete can be freeze-thaw resistant for more than 300 times, and high-resistance carbonization concrete can also be made.
III. Technical Performance:Homogeneity index
|
Item |
Performance |
|
|
Water |
Powder |
|
|
Appearance |
brown liquid |
yellow or brown powder |
|
Solid content (%) ≥ |
38±1 |
92 |
|
Fineness 0. 315mm sieve residue (%)≤ |
- |
15 |
|
PH |
7-9 |
7-9 |
|
Sodium sulfate content(％),≤ |
8 |
20 |
|
Total alkali content (Na2SO4+K20)% |
7±1 |
16±2 |
|
Chloride ion content(％),≤ |
0.3 |
0.5 |
|
Cement paste fluidity mm,≥ |
200 |
200 |
|
Remarks: Standard cement is used in the test, and the FDN content is 0.75% of the cement content (water-cement ratio 0.29). |
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IV.Product index: Concrete physical and mechanical properties
|
Item |
Factory technical indicators |
National standard ( A Grade ) |
|
|
Water reduction rate(％)≥ |
18 |
14 |
|
|
Bleeding rate ratio (％)≤ |
60 |
90 |
|
|
Air content(％),≤ |
3.0 |
3.0 |
|
|
Difference in setting time |
Initial setting |
－90~+120 |
－90~+120 |
|
Final setting |
－90~+120 |
－90~+120 |
|
|
Compressive strength ratio(％)≥ |
1Day |
145 |
140 |
|
3Day |
140 |
130 |
|
|
7Day |
130 |
125 |
|
|
28Day |
120 |
120 |
|
|
Compressive strength ratio(％)≥ |
28Day |
120 |
135 |
|
90Day |
110 |
- |
|
|
Relative durability index (%) 200 times ≥ |
90 |
- |
|
|
Corrosion of steel bars |
No corrosion |
- |
|
