ODWH6XSHUSODVWLFL]HU - Institute of Physics
results show that adaptability of the PCE-2 is better than those of the commercially available Polycarboxylate Superplasticizer (PCE-1). 1. Introduction Polycarboxylate Superplasticizer (PCE) has become the most widely used admixture in the world due to its high water-reducing rate, environmental friendliness and strong molecular designability [1].
Progresses in Synthesis of Polycarboxylate Superplasticizer - Hindawi
Polycarboxylate superplasticizer (PCE) was synthesized by unsaturated monomers of carboxylic acid, alkane macromonomers of long chains, and others. It was an excellent cement dispersant which would make great performance in concrete [ 1 ].
ODWHVXSHUSODVWLFL]HU
experimental results show that the hyperbranched solid polycarboxylate superplasticizer has a high water-reducing rate and good slump retention. It can be applied in cement-based grouting materials well. 1. Introduction Polycarboxylate superplasticizer (PCE) shows strong designability in molecular structure.
Amphoteric polycarboxylate superplasticizers with enhanced clay
The interlayer spacing of sodium bentonite increased by 0.2 nm after the adsorption of superplasticizer, without significant difference between APC and PCE. A possible mechanism was proposed that the cationic groups can insert into the interlayer of clay by cation exchange, and the intercalation of PEO side chains was inhibited, which is different from that of PCE.
Study on the dispersion performance and mechanism of polycarboxylate
The steric hindrance formed by polyether side chains is the key factor determining the dispersion performance of polycarboxylate superplasticizer (PCE). While with the increase of the side chain length, the coiled conformation of side chain will prevent the dispersion ability of PCE from being further improved.
- How are polycarboxylate superplasticizers synthesized?
- In this work, a series of polycarboxylate superplasticizers (PCEs) were synthesized via copolymerization using a novel macromonomer, ethylene–glycol monovinyl polyethylene glycol (EPEG). The molecular structures were modified by varying the side chain length, carboxylate density and integrating sulfonic group.
- What is a comb-like polycarboxylate superplasticizer (PCE)?
- In this study, a novel comb-like polycarboxylate superplasticizer (PCE) was synthesized using isobutenyl polyethylene glycol (IPEG) and hydroxyethyl acrylate (HEA) by atom transfer radical polymerization (ATRP) (defined as A-CPCE).
- What is a polycarboxylate ether superplasticizer?
- The polycarboxylate ether superplasticizer is an additive commonly used in concrete engineering and has a wide range of applications. The PCE based admixture can significantly reduce the amount of cement and improve the fluidity and pumpability of concrete while ensuring the strength and durability of concrete.
- What are viscosity reducing polycarboxylate superplasticizers (Jn-PCE)?
- In this study, we synthesized a series of viscosity-reducing polycarboxylate superplasticizers (JN-PCE) utilizing allyl polyethylene glycol ether (APEG), acrylic acid (AA), and sodium methallyl sulfonate (SMAS) as raw materials through the process of free radical polymerization.
- What is the molecular structure of modified polycarboxylate superplasticizer (PCE-P)?
- The FTIR results revealed that the molecular structure of the modified polycarboxylate superplasticizer (PCE-P) comprised sulfonic acid, carboxylic acid, and polyepoxyethane vinyl groups, exhibiting a comb-like molecular structure.
- What are the advantages of polycarboxylate based superplasticizer?
- Low dosage and high water reduction rate. The water reduction rate of polycarboxylate based superplasticizer can be as high as 45%, which can be used to prepare high-strength and high-performance concrete. Small loss when slump is light.
