Product Summary:
JK-9 Early strength water-reducing admixture is a chlorine-free concrete admixtures which is composed of early strength and water-reducing and other components, with excellent early strength performance and water-reducing performance, it can increase the early strength and the later strength at low temperature environmental condition, increase significantly the pumpability, improve the workability, it have been widely used in various projects as the main measure to speed up the progress and improve the efficacy.
Homogeneity of Norms:
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Item
|
Norm
|
Item
|
Norm
|
|
Appearance
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Gray powdery
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Ph value
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7-9
|
|
Finesse
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0.315mm sieve≤12%
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Chlorine content
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No
|
|
Moisture content
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≤10%
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Fluidity of cement
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160mm
|
Principal Technical Performances:
1. Dosage amounts to 01.5-2.5% of cementitious material, it can reduce the unit water consumption by 10-15%.
2. Incorporation of the product in keeping the same slump, it can save 10-15% of cement, the strength is not reduced.
3. Suitable for steam curing, the intensity increased rapidly, and with the same slump and the same water consumption, the concrete strength increases 50-120% for 1 day, increased 40-100% 3 days, and increased 30-80% 7 days.
4. There is still a corresponding increase in later strength of concrete while mixing with this product.
5. Suitable for works -5 ℃ -30 ℃, it can accelerate the progress of the templet and of the construction, it has a economic and technical effects.
6. The product has neither retarder nor air-entraining, which has a wide range of adaptability, it can improve the main mechanical property of concrete and improve the impermeability performance of concrete, but no effect on concrete shrinkage.
Physical and Mechanical Performance of the Concrete:
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Item
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Factory technical norm
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National standard (first class)
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|
Water-reducing rate (%)
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≥12
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--
|
|
Bleeding rate (%)
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≤90
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≤100
|
|
Air content (%)
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≤2.5
|
--
|
|
Setting time (min)
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Initial setting
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-30～+30
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-90～+90
|
|
Final setting
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-30～+30
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-90～+90
|
|
Compressive strength (%)≥
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1 day
|
145
|
135
|
|
3 days
|
140
|
130
|
|
7 days
|
120
|
110
|
|
28 days
|
110
|
100
|
|
Shrinkage (%)
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28 days
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≤120
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≤135
|
|
Corrosion reinforcing steel bar
|
No
|
|
Applied Points of Technology:
1. Please follow the provisions of "application of technical specifications of concrete admixtures" for construction.
2. Agitated and mixed water according to dosage of cement or mixture, preferably using mechanical agitation.
3. Should pay attention to maintenance during the construction.
