I. Product Introduction
Early-strength Polycarboxylic acid water reducing agent has the characteristics of super plasticization, high slump retention, high reinforcement, and low shrinkage, and can be formulated with different strength grades of concrete. It is especially suitable for the preparation of high-strength, high-fluidity, self-compacting, high-durability, and high-performance concrete. Non-toxic and harmless, safe for health and environment.
II. Main technical performances
|
Item |
standard |
Factory technical indicators |
|
|
Performance |
Colorless or light yellow liquid |
Colorless or light yellow liquid |
|
|
Fluidity of cement paste mm,≥ |
250 |
280 |
|
|
Water reduction rate(％)≥ |
25 |
28 |
|
|
Bleeding rate ratio(％)≤ |
60 |
60 |
|
|
Air content(％), ≤ |
6.0 |
5.0 |
|
|
Difference in setting time |
Initial setting |
－90~+120 |
+20 |
|
Final setting |
－90~+120 |
+30 |
|
|
Compressive strength ratio(％)≥ |
1Day |
170 |
180 |
|
3Day |
160 |
175 |
|
|
7Day |
150 |
155 |
|
|
28Day |
140 |
150 |
|
|
Shrinkage ratio (％)≤ |
28Day |
120 |
100 |
|
90Day |
110 |
- |
|
|
Corrosion of steel bars |
No corrosion |
- |
|
III. Product scope of use
Early-strength Polycarboxylic acid water reducing agent is suitable for preparing various grades of pumped concrete and commercial concrete for long-distance transportation, especially suitable for construction pipe piles. And suitable for high-strength concrete, fluid concrete, self-compacting concrete, large-volume concrete, high-performance concrete, clear water concrete and other structures.
IV. Applicable methods and matters needing attention
1. Early-strength Polycarboxylic acid water reducing agent is a colorless or light yellow transparent liquid, the usual dosage: 1.5-2.5% (based on the total weight of the gelling material), the dosage can be increased to 1.0-2. 0% when preparing high-strength concrete.
2. Before use, the optimum dosage should be determined according to the engineering construction requirements, material characteristics, and trial mix.
3. When adding this Early-strength Polycarboxylic acid water reducing agent, it should be accurately measured to avoid large dosage errors. Leakage and repeated mixing are strictly prohibited.
4. It cannot be used in combination with naphthalene-based water-reducing agent. When it is used in combination with other kinds of admixtures, it should be confirmed by experiment.
5. After pouring, the concrete should be maintained in accordance with the construction regulations. Winter construction can follow the "Winter Construction Regulations".
6. Changes in the mud content of sand and gravel and the quality of admixtures have a greater impact on the effect of product water reduction. Users should choose aggregates and admixtures with composite standards.
V. Packaging, Transportation and Storage
This Early-strength Polycarboxylic acid water reducing agent is liquid, packed in plastic barrels, 1 ton per barrel, and can also be transported by tanker. The storage process should prevent leakage, exposure and high temperature. Storage with ironware should be avoided. The storage period is one year. After expiration, it should be tested to determine the use. This product is non-flammable and explosive and should be kept properly.
