The LonS-P polycarboxylic acid high-performance Superplasticizer produced by our company is a macromolecular polymer with a certain molecular weight formed through graft copolymerization of unsaturated monomer under the function of initiator by grafting side chain with active orogen to the main chain of polymer.
1, Properties
1, LonS-P is a safe and environmentally friendly high-efficiency Superplasticizer featuring low blend dosage, high water reduction rate, and fine cement adaptability without any influence upon the environment.
2, LonS-P appears to be a light brown liquid with main homogeneity indicators listed as follows:
| Total Solid% | Density g/ml | PH Value | Cl-Content% | Alkali Content% | Formaldehyde Content |
| 20±2 | 1.07±0.02 | 6~8 | <0.05 | <2 | 0 |
3, Performance indicators of concrete mixed with LonS-P.
| Item | Water Reduction % | Ratio of bleeding % | Air Content % | Temporal Distribution for Setting min | Compressive Strength, % | Shrinkage, (d | Corrosion on Steel Bar | ||||
| Initial Setting | Final Setting | 1d | 3d | 7d | 28d | ||||||
| Enterprise Standard | ≥25 | ≤60 | ≤6 | ＜-90 | ＜-90 | ≥170 | ≥160 | ≥150 | ≥140 | ≤100 | None |
| Note: standard blend dosage 0.3% for powder (as cement amount) | |||||||||||
2, Comparison between LonS-P and FDN series superplasticizer.
| Item | FDN | LonS-P |
| Functional Group | -SO3Na | -COONa |
| Dispersion Theory | DLVO | DEPLETION theory of steric hindrance effect |
| Dispersing Morphology | Single Chain | Multi-chain Shape |
| Electrostatic Repulsion | High | Low |
| Reaction | Absorption, dispersion | Absorption, dispersion, hydrate decomposition, redispersion |
| Water Reduction | 15~25% | 25~35% |
| Slump Maintenance | 30 minutes | Adjustable |
| Stickiness Adjustability | Non-adjustable | Adjustable |
3, Application Scope and Method
1, LonS-P mixed with concretes above C45 will result in a more comprehensive and economical effect. Lons-P can also be applied in C45 below.
2, The blend dosage range of LonS-P is 0.1~0.4% (powder) of the weight of cement or gel material. The regular blend dosage is 0.15~0.30% (powder). Since the water reduction rate of concrete mixed with LonS-P is relatively high, the concrete slump is sensitive to water content, which shall be strictly controlled during operation.
3, LonS-P can be directly added into mixing water or the wet concrete already mixed with mixing water; it is not recommended to add LonS-P into dry concrete mixture. Separate batches and feeding tubes are needed.
4, Adaptability of LonS-P to most cement is satisfactory, but to some cement, problems such as low water reduction, and high slump loss may appear. Besides, the fineness and storage time of cement may also influence the application effect of LonS-P. Upon such a situation, solutions such as appropriately increasing the blend dosage or formulating other retarding components and so on may be applied.
5, A compatibility problem exists in the formulation of LonS-P and other superplasticizers. It is recommended that the necessary formulation experiment shall be conducted before application, so as to obtain the best effect.
6, With the application of LonS-P, the air content of concrete is increased (usually 3~5%). It is good for improving the workability and durability of concrete. A certain amount of defoamer may be added if the air content needs to be reduced.
4,Packing, transportation and storage
1, Plastic drums are used for airtight packing to prevent leakage or evaporation. Tank car may be used for bulk packing in transportation.
2, LonS-P can be stored for 6 months under the temperature of 5~40℃ if the original packing is not removed. In particular, in situations when the solution becomes turbid, please carry out a second inspection and then use it as early as possible.
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