Cement-superplasticiser compatibility - Issues and challenges
The improvement of the technology for obtaining new self-compacting concrete (SCC) with improved rheotechnological and increased strength characteristics is continuously associated with the...
Cement and Superplasticizer Combinations: Compatibility and Robustness
Results showed that the chemical composition of the cement is critical to ensure good compatibility and adequate robustness of various combinations of cements and superplasticizers. The chemical nature of the superplasticizer also plays a role in the behavior of such combinations.
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:
Progresses in Synthesis of Polycarboxylate Superplasticizer - Hindawi
The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well as enhancement in
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...
- Are superplasticizers compatible with cement?
- The incompatibility between the superplasticizer (SP) and cement can cause problems with the cementitious materials’ fresh and hardened qualities, such as unstable workability, uncontrollable setting times, excessive air entrainment, and so on. In this paper, five various types of SPs were prepared.
- What is a superplasticizer in cement?
- According to ASTM C494, superplasticizers are linear polymers that possess a sulfonic acid group. The addition of superplasticizers into a mix neutralizes the surface interaction among the cement particles and thus, reduces the viscosity of cement paste (free from agglomeration) resulting in reduced pore volume.
- Are superplasticizers a good solution for a high viscosity cement formulation?
- These superplasticizers may also be a potential solution for the high viscosity and workability drawbacks of new cementitious formulations, such as composite cement or alkali-activated cement, which limit their in-situ implementation.
- Why is superplasticizer incompatibility a problem?
- The cement–admixture (superplasticizer) incompatibility may affect both the fresh state and hardened properties of the cementitious mix - the main ones are rapid loss of workability, excessive quickening/retarding of setting times, low strength gain, excessive air entrainment, and increased risk of shrinkage with moderate cracking.
- Do superplasticizers affect concrete tensile strength?
- Therefore, the effect of superplasticizers mainly influences the workability of concrete rather mechanical properties. Similarly, previous studies on incorporation of carbon fiber reinforced polymer (CFRP) resulted the split tensile strength of 11.7 MPa .
- 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
