Evaluation of properties of gypsum plaster-superplasticizer
The best values of ultimate compression and flexural strength are obtained with an optimum dosage of 0.6% superplasticizer in the gypsum plaster. The increase of compressive and flexural strength was 69% and 42%, respectively as compared with the gypsum plaster without admixture.
Gypsum - Sika Performance Additive Technologies
liquefying performance of Sika ViscoCrete PCEs for gypsum is typically 3 to 5-times higher. PRINCIPLE OPTIONS WHEN UPGRADING TO SIKA’S PCE-BASED HIGH-PERFORMANCE SUPERPLASTICIZERS When switching from a mid-range to a truly high-performance superplasticizer, there are two principal options, assuming a constant slump flow is targeted: Option 1:
Evaluation of properties of gypsum plaster-superplasticizer
Superplasticizers are water reducing admixtures used to improve the flow ability of cementitious materials, resulting in enhanced mechanical properties of the hardened products. They comprise high molecular weight organic polymers containing several polar groups which render them water soluble.
Sika ViscoCrete G-2 | Superplasticizer
Sika ViscoCrete G-2 is a high-performance superplasticizer and water reducer based on Sika ViscoCrete polycarboxylate polymer technology. High water reduction Excellent flowability Free of formaldehyde and ammonia Safety Data Sheet Product Data Sheet Show all documents Overview Product Details Application Documents Usage
Selection of Superplasticizers for High-Performance Concrete
Superplasticizers are used to fluidify the concrete in the field. Most of the superplasticizers helped to maintain high slump values for a time of 30 to 45 minutes. But some of the Portland cement do no behave well with the use of superplasticizers. This problem is understood only by the detailed study on the mode of action of superplasticizers.
- Does superplasticizer improve gypsum hydration?
- These studies showed that superplasticizer accelerates the rate of hydration and leads to the formation of a dense and well compacted texture of crystals, thereby imparting high strength and better water resistance to the gypsum matrix than the reference material. 1. Introduction
- Which superplasticizer provides the strongest water resistance to gypsum products?
- From the observed results, it is confirmed that the most hydrophobic superplasticizer, PStSS-14 provides the strongest water resistance to the gypsum product. FT-IR results also support this observation (Fig. S10). It indicated that extended and strong water resistance of gypsum products can be achieved by properly designing a superplasticizer.
- Does superplasticizer add gypsum matrix?
- The reduction in water content and modification of β-calcium sulphate hemihydrate through superplasticizer addition which lead to a perceptible improvement in the strength of the plaster by intensification of gypsum matrix, contributed to this phenomenon. Fig. 6. Thermogravimetric curves of hydrated G1 and G6 samples. 3.6. X-ray diffraction studies
- Does superplasticizer affect compressive strength of modified gypsum?
- A 0.6 wt% SMF content contributes 69% enhancement in the compressive strength of modified paste as compared to reference sample. The influence of superplasticizer on the hydration characteristics and morphology of the gypsum crystals have been studied by XRD, TGA, SEM and Electrical Conductivity techniques.
- How does superplasticizer affect gypsum porosity and water absorption?
- The gelatinous substances formed by the chemical interaction between the superplasticizer molecules and calcium ions fill the pores of gypsum matrix and thus reduced the porosity and water absorption of modified gypsum sample. 5.
- What are superplasticizers used for?
- Superplasticizers are water reducing admixtures used to improve the flow ability of cementitious materials, resulting in enhanced mechanical properties of the hardened products. They comprise high molecular weight organic polymers containing several polar groups which render them water soluble.
