Synthesis and Properties of a Polycarboxylate Superplasticizer with a
Polycarboxylate superplasticizers (PCEs) emerged as one of the most important superplasticizers for concrete due to their superior performance. (1,2) Compared to other products like polycondensates, they fluidize cement even at low water to cement ratios, require relatively low dosages, and exhibit a long slump retention capability. (35) The
MasterPolyheed 8126
pumped concrete. It contains polycarboxylate ether polymers and is specially formulated to give exceptionally high water reduction and significantly improved slump retention compared to conventional superplasticizer. MasterPolyheed 8126 is free of chloride and has been formulated to comply with Chinese Standard
Structure-property relationships for polycarboxylate ether
Poly (ethylene glycol) methyl ether methacrylate (PEGMA300, M n = 300 g/mol, Aldrich), poly (ethylene glycol) ethyl ether methacrylate (PEGMA500, M n = 500 g/mol, Aldrich), and poly (ethylene glycol) ethyl ether acrylate (PEGA480, M n = 480 g/mol, Aldrich) were purified by passing over a basic aluminum oxide column.
Low-cost synthesis of high-performance polycarboxylic ether by Co2
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.
Polycarboxylate ether superplasticizer with gradient structure
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
- 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 is Polycarboxylate ether/ester (PCE) superplasticizer?
- 1. Introduction 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.
- How are gradient and block Polycarboxylate ether superplasticizers synthesized?
- In this paper, gradient and block polycarboxylate ether superplasticizers (PCEs) composed of allyl alcohol polyoxyethyl-ene ether macromonomer and acrylic acid were synthesized via aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization.
- What are poly (carboxylate ether) based superplasticizers?
- Latest generations, poly (carboxylate ether)-based superplasticizers, (PCEs), have acrylate groups in the backbone and also contain side chains (i.e., poly (ethylene oxide)) that protrude from the cement surface into the pore solution to produce steric hindrance effect 8, 9.
- What is Polycarboxylate ether (PCE)?
- hardened material and produces a more durable concrete with better mechanical performances . Polycarboxylate ether (PCE) is a new generation of superplasticizer, which was invented in 1981 , following the development of con-ventional lignosulfonate water reducing agent, naphthalene, and melamine-based superplasticizers.
- What is a polycarboxylate superplasticizer?
- In contrast to other polycarboxylate superplasticizer such as sodium bisulfite and tonalite, polycarboxylate molecules generated through the REDOX system of hydrogen peroxide and ammonium persulfate Vc exhibit a compact high monomer conversion and molecular weight distribution.
