Superplasticizer - an overview | ScienceDirect Topics
Superplasticizers used in concrete come in four main groups: – Sulfated naphthalene formaldehyde (PNS); – Sulfated melamine formaldehyde (PMS); – Vinyl copolymers (VCPs); – Polycarboxylic ethers (PCEs). 8.2.1 Polynaphthalene sulfonates In 1930, PNS was used for the first time in the manufacture of synthetic rubber and the textile chemicals.
Concrete Admixtures Handbook | ScienceDirect
This problem can likely be resolved by changing the type and brand of the super-plasticizers used. The performance of high-volume fly ash concrete, subjected to deicing salts, is relatively poor and further research is needed before the use of this type of concrete can be recommended for this application involving this kind of exposure.
Super-plasticizers In Concrete: Amazon.com: Books
Super-plasticizers In Concrete. Unknown Binding – January 1, 1979. 1 rating. 1 LB bag Concrete additive-Water reducer-Super plasticizer High-performance superplasticizer for cement based construction materials Characteristics / Chemistry Free-flowing, spray dried powder of modified polycarboxylic ether. Fields of Application Superplasticizer
Effect of Superplasticizer on Workability and
This research examined the effect of superplasticizer on workability and properties of self-compacting concrete (SCC). Three types of superplasticizers Conplast SP 561, Conplast SP 430 and...
Use of Water Reducers, Retarders, and Superplasticizer
There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures. Commonly used are melamine based and naphthalene based superplasticizers.
- Can superplasticizers be integral components of high-performance concrete?
- The use of superplasticizers as an integral component of high-performance concrete is the main topic of this book.
- What are some examples of superplasticizer compositions?
- Common examples of superplasticizer compositions include Polynaphthalene Sulfonate (PNS), Polymelamine Sulfonate (PMS) and Polycarboxylate Ether (PCE) based polymers. This study focuses on assessing the impact of various superplasticizers on the performance of UHSC.
- Does superplasticizer affect rheological and strength properties of self-consolidating concrete (SCC)?
- The effect of different types of superplasticizer on fresh, rheological and strength properties of self-consolidating concrete (SCC) was investigated by Mardani-Aghabaglou et al. . The admixtures used had the same main chain and the same polymer structure but different molecular weight and different side chain density of carboxylic acid groups.
- Why do you need A superplasticizer?
- They help to obtain concrete with higher tolerance to slight changes in the water content, and reduce bleeding and segregation if either superplasticizer is overdosed or the water content is too high.
- Does PCE superplasticizer adsorb in concrete?
- The adsorption of PCE superplasticizer in a concrete mix was found to be higher than in a cement paste mixed at 700 rpm with identical mixing time, W/C and dosage. However, the relative differences of adsorbed masses of the different PCEs measured in the cement paste correlated with the results from concrete.
- How does cement chemistry affect the dispersion efficiency of superplasticizers?
- Cement chemistry can affect the dispersion efficiency of superplasticizers in various ways. One of these is through the ionic composition of the aqueous phase and in particular through the amount of soluble sulfates. The milestone paper on this subject comes from Yamada and Hanehara (2001).
