Influence of superplasticizer on workability and strength
The hydroxylation process in the geopolymer process requires a precise amount of water to achieve the maximal reaction rate of the geopolymer. As the superplasticizer concentration rises, the dispersion of alumina-silicate particles is more, resulting in an increase in water release, lowering water consumption and thus increasing the reaction rate.
Influence of superplasticizer on the properties of geopolymer
The influence of different alkali and alkaline earth cations (Na +, K +, Ca 2+, and Mg 2+), and of solution pH, on surface interactions of metakaolin particles with a sodium naphthalene sulfonate formaldehyde polymer (SNSFP) (a commercial superplasticizer for concretes) was investigated in aqueous systems relevant to alkali-activated and blended Portland cements.
Influence of Superplasticizer on Workability and Early
Superplasticizer is a liquid form admixture of which the addition requires the modification of the water content to keep the mixture volume in OPC mixture. Similarly to this, the addition of superplasticizer in geopolymer mixture should modify the water content in geopolymer mixture in order to maintain the volume of mixture proportion.
EFFECTS OF BIO-BASED PLASTICIZERS, MADE
Conventional superplasticizers based on polycarboxylate ether (PCE) show an intolerance to clay minerals due to intercalation of their polyethylene glycol (PEG) side chains into the interlayers of the clay mineral. An intolerance to very basic media is also known. This makes PCE an unsuitable choice as a superplasticizer for geopolymers. Bio-based superplasticizers derived from starch showed
Addition of superplasticizer on geopolymer concrete
The superplasticizer (Conplast SP-430) was added by 1.5% of the cementitious materials by mass. This was in accordance with the findings that 1.5% of the naphthalene-based superplasticizer by mass
- Do commercial superplasticizers promote green geopolymer applications?
- To promote the application of green geopolymer materials, the effects and mechanism of commercial superplasticizers on the fresh properties of one-part geopolymers prepared from fly ash (FA), slag powder (Slag) and anhydrous sodium silicate powder were studied, including flowability, rheological properties and particles packing properties.
- Does superplasticizer doage affect workability and strength of geopolymer concrete?
- Increase in the dosage of superplasticizer can have a significant effect on workability and strength properties of Geopolymer concrete in ambient curing. This paper evaluates the influence of different superplasticizer doage on workability and strength properties of GGBS based Geopolymer concrete.
- Why do geopolymer pastes need a superplasticizer?
- The addition of superplasticizers could improve fluidity, increase plastic viscosity, and decrease yield stress of the pastes. The particles packing properties, including excess water and water film thickness (WFT) of the geopolymer pastes with superplasticizers also increase.
- Does superplasticizer increase the workability of geopolymer paste with GGBFS?
- Using a superplasticizer (N.G.SP) was expected to increase the workability of geopolymer paste with GGBFS, but the workability remained the same. Using the combination of additional cement, water, and superplasticizer (N.G.A and K.G.A) contributes to more workable mixture.
- How to improve the workability of fresh geopolymer concrete?
- Using the combination of additional cement, water, and superplasticizer (N.G.A and K.G.A) contributes to more workable mixture. The fresh geopolymer concrete workability was tested using Abram’s cone according to ASTM C-143. All proportions showed great flow (Fig. 41.2).
- Does superplasticizer increase workability under ambient curing?
- Significant increase in workability and slight decrease in strength was observed with increase in superplasticizer under ambient curing. The combination of 6% superplasticizer and 12M NaOH concentration of GGBS based Geopolymer concrete was advisable for precast construction under ambient curing.
