Dosage Limit Determination of Superplasticizing Admixture and Effect
High performance concrete (HPC) is a new concrete with unique properties such as high workability, higher strength, high modulus of elasticity, higher density, higher dimensional...
Superplasticizer
Superplasticizers ( SPs ), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
Effect of Superplasticizer on Workability and Properties of Self
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...
Effect of Super-plasticizer Dosages on Fresh State
Sikament-520BA super plasticizer and sand with 2.01 fineness modulus was used to prepare high strength concrete. Use of superplasticizer in improving the concrete properties has already been
Handbook of Plasticizers - George Wypych - Google Books
Handbook of Plasticizers. George Wypych. ChemTec Publishing, 2004 - Electronic book - 687 pages. 3 Reviews. Reviews aren't verified, but Google checks for and removes fake content when it's identified. A comprehensive source providing theoretical, historical and up-to-date information on placticizers' physical and mechanical properties, action
- 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.
- 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.
- 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).
- Can superplasticizers be intercalated in early cement hydrates?
- But, superplasticizers like PNS or PCE can be intercalated in early cement hydrates (Flatt and Houst, 2001, Plank et al., 2006b) and we cannot distinguish between adsorbed and intercalated admixtures. What we measure is the sum of adsorbed and intercalated polymer.
- Do superplasticizers cause segregation?
- Because cement particles are large enough to be affected by gravity forces, this means that, depending on the solids volume fraction, segregation may occur. In practice the use of superplasticizers is always faced with this balance between enhancing dispersion while trying to avoid segregation.
- What is a PCE superplasticizer?
- This new class of superplasticizers has replaced the former generations of superplasticizers (PNS, PMS and the vinyl copolymers) in many applications. It was PCEs that really enabled the concept of self-consolidating concrete (SCC) to find its place in the market.
