Effect of Functional Superplasticizers on Concrete
Functional polycarboxylic acid superplasticizers such as water-reducing superplasticizer, sustained-release superplasticizer, and early-strength superplasticizer delay the initial reaction rate of cement and improve the pore structure of mortar and concrete.
Performance and Compatibility of Phosphonate-Based
The main properties of the NSF and PCE-based superplasticizers are summarized in Table 2. Concretes with w/c ratio equal to 0.52 and with a cement content of 325 kg/m 3 were manufactured. The concrete mix composition is shown in Table 3. Particle size distribution of aggregates is shown in Figure 1.
Selection of Superplasticizers for High-Performance Concrete
The naphthalene superplasticizers are marketed with a solid content from 40 to 42 percent. The melamine superplasticizers are marketed for a solid content of 22 to 30 %. New melamine superplasticizers are said to have solid content of 40 percent. The experience show that the efficiency of the superplasticizers depends on the following parameters:
Polycarboxylate Superplasticizer Powder & Liquid for Concrete
Polycarboxylate superplasticizer (High Slump Retention) is clear transparent liquid. It keeps the slump of concrete well, and can prolong the slump retention time of concrete. What’s more, PCE superplasticizer also shows great performance in hot environments. The packing of PCE liquid is 230kg PE drum, 1100kg IBC tank or flexitank.
Superplasticizers for Concrete - MDPI
for concrete with higher efciency in terms of water reduction with respect to polycarboxilate-based admixtures and characterized by a higher compatibility upon different cement types/production batches than NSF-based admixtures. 2. Materials and Methods Concrete mixes manufactured by using 13 different cement types produced by different cement
- What is a high range concrete superplasticizer?
- High range concrete superplasticizers have a strong dispersing effect on cement, which can greatly improve the fluidity of the cement mixture and the slump of the concrete, and at the same time greatly reduce the water consumption and significantly improve the workability of the concrete.
- What are the different types of superplasticizers used in concrete?
- With the gradual enrichment of the types of concrete, the types of superplasticizers have also increased, and naphthalene superplasticizers and polycarboxylic acid superplasticizers are beginning to be widely used in concrete [27, 28].
- Do superplasticizers improve the fluidity of concrete?
- 5. Conclusions Superplasticizers are chemical additives that can significantly improve the fluidity of concrete. They work by reducing the surface tension between cement particles and water, thereby reducing the amount of water required to improve the workability of concrete.
- What is Kingsun concrete superplasticizer?
- Therefore, Kingsun concrete superplasticizers can be suitable for prefabricate and cast-in-place reinforced concrete in various industrial and civil construction, water conservancy, transportation, port, municipal and other projects. Besides, it can be used for the water-reducing and reinforcing components of various composite admixtures.
- What happens if the superplasticizer dosage is large?
- When the superplasticizer dosage in concrete is large (over-dosing), the retardation is slightly retarded, but the early strength of the hardened concrete is not delayed. It can greatly reduce the amount of water and significantly increase the strength of concrete at various ages.
- Are amine sulfonate superplasticizers good for concrete?
- Amine sulfonate superplasticizers can achieve a water reduction rate of more than 25%, which can effectively enhance the workability and durability of concrete, but their production cost is high, and their molecular weight is too large or too small, easily leading to seepage, segregation, or sloughing of concrete [31, 32].
