Ettringite formation: A crucial step in cement superplasticizer
1. Introduction. Cement-superplasticizer compatibility is becoming a source of major concern in the concrete industry due to the increasing use of high performance concretes having low W/C ratios [1].
Evaluating Superplasticizer Compatibility in the Production of High
Evaluating Superplasticizer Compatibility in the Production of High Performance Concrete using Portland Pozzolana Cement CEM II/B-P Thomas Omollo Ofwa1, David Otieno Koteng’2, John Nyiro Mwero3 1MSc
Cement and Superplasticizer Combinations: Compatibility and Robustness
Based on the results of this study, a rough prediction of the compatibility and robustness of cements and superplasticizers could be made by analyzing the chemical composition of the cement and the chemical nature of the superplasticizer. Author Information Nkinamubanzi, P-C Advanced Concrete Technology Program, Ottawa, Canada Atcin, P-C
CEMENT AND SUPERPLASTICIZER COMBINATIONS: COMPATIBILITY AND ROBUSTNESS
The authors conclude that a rough prediction of the compatibility and robustness of cements and superplasticizers could be made by analyzing the chemical composition of the cement and the chemical nature of the superplasticizer. This paper was presented at a symposium on cement-admixture interactions (December 2003, Tampa, Florida). Availability:
Selection of Superplasticizers for High-Performance Concrete
By only focusing on the solid content it is recommended to use naphthalene superplasticizers when compared with the melamine. 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 %.
- Which type of superplasticizer is best for concrete production?
- Thus, theAP type superplasticizers (and also PC type superplasticizers) are particularly suitable for production of concretes with low W / C as HPC or self-compacting concretes (SCC) (high plastic viscosity due to superplasticizer addition is in this case very advantageous).
- What is a superplasticizer in cement mix?
- Superplasticizers (SP) are one of the most important constituents of cement cementitious mix mixes. It makes cementitious mix flowable at a low water-cement ratio without segregation and bleeding as required for high-performance concrete .
- What is superplasticizer compatibility?
- The first moment consumption of Superplasticizer molecules after the mixing is qualified as the cement/Superplasticizer compatibility. It is very difficult to make high-performance concrete with a very low water-cement ratio, that it will still have a slump value of 50mm 30 minutes with an initial slump value of 200mm.
- Do superplasticizers increase the workability of concrete?
- Admixtures known as superplasticizers may greatly increase the workability of concrete or greatly reduce its water content. Test data, although limited and inconclusive, found superplasticizers to increase slump without segregation. Freeze-thaw durability and compressive strengths compare favorably to the controls. Further investigation is needed.
- Why are superplasticizers used in Indian cementitious mix?
- Superplasticizers are increasingly being used in Indian cementitious mix from the 1980 s onwards as they have proved their credibility in parameters like water and cement reduction apart from workability retention, strength gain, and ease to place and pump.
- Does superplasticizer -poly carboxylate ether in cement composites increase strength?
- Our paper reports the addition of high performing superplasticizer -Poly Carboxylate Ether in cement composites as per Indian Standards has resulted in a denser cementitious matrix and higher strength gain at longer terms compared to normal superplasticizers. 1. Introduction
