Concrete super plasticizer-retarder
Description
Concrete super plasticizer-retarder
Concrete super plasticizer-retarder is a liquid additive based on polynaphthalene sulfonate. By increasing the efficiency and functionality of concrete, it also prevents the dehydration and separation of concrete aggregates.
Features:
- Prevents concrete creep
- Compatible with Portland cement
- Provides ease of pumping and pumping of concrete
Applications:
- It is suitable for concreting in hot weather conditions
- Ability to build and transport concrete over long distances
- It is suitable for the implementation of bulky concrete
Technical specification table:
| Appearance | liquid |
| Color | brown |
| Specific gravity | gr/cm3 1/12 |
| standard | ASTM C494 |
Package:
20 litter galon
Product Description – Delayed setting concrete superplasticizer
Delayed-setting concrete superplasticizer is a liquid additive based on polynaphthalene sulfonate that, in addition to fluidizing concrete and reducing the water-to-cement ratio, delays the initial setting of concrete and compensates for the negative effects of accelerated setting at high temperatures. Delayed-setting concrete superplasticizer is a type of concrete superplasticizer and, by increasing the efficiency and workability of concrete, also prevents water loss and separation of concrete aggregates. This product is especially suitable for pouring concrete in hot weather and for large-scale concrete pouring in order to control the initial setting time of concrete. The use of concrete superplasticizers provides many advantages, one of the most important of which is that it causes uniform and complete dispersion of cement, thereby making the concrete impermeable.
A retarding concrete lubricant, also known as a retarding admixture, is an additive used to delay the setting of cement mortar or concrete. The use of a retarding concrete lubricant increases the setting time, giving workers more time to mix, transport, and move the concrete. A retarding concrete lubricant creates a protective skin around the cement particles and makes it harder for water molecules to reach the surface, which slows hydration and keeps the cement mortar in place for longer.
Packaging of superplasticizer for delayed setting concrete
What is the packaging of delayed-setting concrete superplasticizer?
20 liter gallon
220 liter barrel
1000 liter tank
Maintenance of superplasticizer for delayed setting concrete
What are the storage conditions for delayed-setting concrete superplasticizer?
Principles of maintaining superplasticizers for slow-setting concrete;
Duration: One year in original packaging.
Conditions: Away from cold and frost, heat and direct and prolonged sunlight.
Best storage temperature: +10 to +30 degrees
Consumption rate of superplasticizer for slow-setting concrete
What is the standard usage rate of superplasticizer for delayed-setting concrete?
The exact amount of superplasticizer additive for slow-setting concrete is determined by conducting proper workshop tests, weather conditions, and the type of materials used. The best consumption rate for this product is between 1 and 1.5 percent of the weight of the cement used. Excessive consumption of the product is not permitted, and it is recommended to consult with experts from Beton Plast Chemical Company if necessary. Excessive consumption will further delay the setting time of the concrete and may cause serious damage to the concrete.
Price of superplasticizer for delayed-setting concrete?
The price of a retarding concrete superplasticizer depends on various factors such as the appropriate density at the oil level, controlled retarding, the standard water reduction rate, the standard slump increase rate, etc., and certainly, considering the above, a cheap retarding concrete superplasticizer is never a good criterion for selection and purchase. A retarding concrete superplasticizer with a low price definitely requires more mixing with concrete in terms of the lower amount of main raw materials to achieve the desired slump and fluidity. In this case, excess water enters the mixture and causes a weak stability in the concrete. Also, due to the introduction of a larger amount of retarding concrete superplasticizer into the mixture, naturally more retarding materials enter the concrete along with the additive, causing the concrete to suffer a serious weakness in terms of setting.
Method of using superplasticizer for delayed-setting concrete
How is delayed-setting concrete superplasticizer used?
- The amount of superplasticizer for delayed setting concrete calculated according to the grade of concrete should be diluted with 2 times the volume of concrete mixing water. The diluted admixture should be gradually added to the concrete during mixing.
- This product can be added to the ready-mixed concrete and after complete mixing, concrete can be placed. It is recommended to mix for at least 1 minute per cubic meter of concrete.
- Delayed-setting concrete superplasticizer can be added to the batching or truck mixer during concrete production.
Note: Be careful not to pour the slow-setting superplasticizer directly onto dry cement.
Properties and effects of superplasticizers for delayed-setting concrete
What properties and effects does delayed-setting concrete superplasticizer have in improving the quality of concrete?
- Reducing depreciation of concreting equipment
- Increasing the workability time of concrete
- Preventing the possibility of cold joints in large-scale concreting
- Ease of pumping and pumpability of concrete
- Reducing the possibility of concrete performance loss during concreting.
- Compatibility with all types of Portland cement
- Preventing concrete creep
- Preventing shrinkage and shrinkage of concrete
- Increasing cohesion and reducing permeability of concrete
- No delay in achieving concrete compressive strength at advanced ages
- Reducing the water-cement ratio by about 10 to 15 percent
- Increasing the compressive and flexural strength of concrete
Applications of superplasticizers for delayed setting concrete
What are the main applications of delayed-setting concrete superplasticizers?
- Suitable for concreting in hot weather conditions
- Applicable in prestressed and post-stressed systems
- Possibility of implementing all concrete structural elements
- Possibility of concreting with sliding and rolling forms
- Can be cast in sections with high reinforcement density
- Suitable for large-scale concreting
- Possibility of making and transporting concrete over long distances
- Suitable for producing resistant and strong concrete
- Possibility of making concrete with crushed stone materials
Physical and chemical characteristics of superplasticizers for delayed-setting concrete
Does a delayed-setting concrete superplasticizer have physical and chemical properties?
| Title | Feature |
| Mode | Liquid |
| Color | Brown |
| Specific gravity | 12/1gr/cm3 |
| Standard | ASTM C494 |
| Chlorine ion | No |
| PH | About 7 |
Mechanism of action of superplasticizers on delayed setting concrete
The result of the effect of the delayed-setting concrete superplasticizer product is in the form of?
When mixing water and cement, the molecules of the delayed-setting concrete superplasticizer based on polynaphthalene sulfonate create a charged density around the cement particles, which in this way repels the cement grains in the concrete mixture from each other, thus causing the concrete to flow. Naphthalene sulfonate also inhibits the dissolution of ions such as aluminates, which have the highest dissolution rate during the hydration stages. In addition, in the formulation of the delayed-setting concrete superplasticizer, substances are added that make setting time control available by interrupting setting.
How to prepare a quality long-lasting superplasticizer?
According to the visual observations and performance tests, we can be largely confident about the quality of the delayed-setting concrete superplasticizer. A quality delayed-setting concrete superplasticizer should have an oil-like consistency and be relatively sticky on the skin when touched with fingers. This product should also be free of any mold and contamination. Also, the delayed-setting concrete superplasticizer additive should be dark brown in appearance and should not have settled particles. Among the essential performance points, this product should also comply with the consumption rate recommended by the manufacturer and the consumption rate listed in the standard. A quality and standard delayed-setting concrete superplasticizer additive should have a controlled retardation rate, because, for example, if it is too late in setting, it can cause weakness in the concrete or lead to the prevention or excessive delay in cement hydration.
Safety of delayed-setting concrete superplasticizers
What are the safe conditions when using delayed-setting concrete superplasticizer?
Safety principles of delayed-setting concrete superplasticizers;
- This material is not toxic, dangerous, or flammable.
- This product should never come into contact with the eyes. If it does come into contact with the eyes, rinse immediately with plenty of water.
- If skin sensitivity occurs, see a doctor.
- Wear appropriate glasses, gloves, and a mask when using.
Standard for superplasticizers for delayed setting concrete
What global standards are used to produce delayed-setting concrete superplasticizers?
ASTM C494 standard
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