Progresses in Synthesis of Polycarboxylate Superplasticizer
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
Research progress on polycarboxylate based superplasticizers
Polycarboxylate ether/ester (PCE) superplasticizer is a new generation of superplasticizer following the development of poly (naphthalene sulfonate) (PNS), poly (melamine sulfonate) (PMS) and acetone formaldehyde sulfite (AFS) superplasticizers.
Poly(carboxylate ether)-based superplasticizer achieves
Eight PCEs with increasing amounts of modifying co-monomer in the backbone, referred to as X5, X10, X20, and X30 (X: VPA, AMPS) were prepared 19.All of the copolymers contain PEO1000 side chains
Polycarboxylate ether superplasticizer with gradient
In this paper, gradient and block polycarboxylate ether superplasticizers (PCEs) composed of allyl alcohol polyoxyethylene ether macromonomer and acrylic acid were synthesized via aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization. The molecular structure of PCEs was characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared (FT-IR
Low-cost synthesis of high-performance polycarboxylic ether
As a new type of high-performance water-reducing agent, polycarboxylate ether (PCE) has excellent properties such as small dosage and high water reduction rate. However, it is still necessary to develop a synthetic process to improve the performance of PCE at a low cost.
- What is polycarboxylate superplasticizer (PCE)?
- Polycarboxylate Superplasticizer (PCE) represents the latest innovation in concrete admixture technology. Unlike traditional superplasticizers, PCE offers unparalleled control over concrete's rheological properties, making it essential in the production of high-performance concrete.
- Do Polycarboxylate ether/ester superplasticizers affect concrete performance?
- Polycarboxylate ether/ester (PCE) superplasticizers are widely used due to their molecular structural designability, low dosage and high efficiency. However, their high sensitivity and strong interactions with clays in concrete reduce their dispersion and water-reduction capability, which can affect the performance of concrete seriously.
- What are the advantages of polycarboxylate superplasticizers?
- From an engineering perspective, Polycarboxylate Superplasticizers offer several critical advantages. Firstly, the significant reduction in water-cement ratio achieved by PCE contributes to higher early and ultimate strength in concrete.
- Do sacrificial agents and molecular design affect clays-resistance of PCEs?
- The effects of use of sacrificial agents and molecular design on clays-resistance of PCEs are analyzed. Polycarboxylate ether/ester (PCE) superplasticizers are widely used due to their molecular structural designability, low dosage and high efficiency.
- Can a new superplasticizer reduce shrinkage of concrete containing montmorillonite?
- A type of novel superplasticizer (PCA-SF) with a snowflake-shaped side chain (Fig. 17) decreases thickness of the area (~0.9 μm) in comparison with the conventional PCE (~2.0 μm) and increases the compatibility between clays and PCA-SF. The introduction of PCA-SF showed better control on drying shrinkage of concrete containing montmorillonite.
- What is a star shaped superplasticizer?
- Star-shaped (SPCE) superplasticizer can be synthesized by esterification to obtain the core of structure, followed by polymerization . SPCE can form a large stereoscopic structure and a thick water film to disperse cement particles effectively and prevent flocculation.
