The influence of type and combination of polycarboxylate
However, various types of polycarboxylate-based (PCE) superplasticizer is widely used in the concrete industry due to its improved water reducing effectiveness. The PCE superplasticizer is a comb-like a polymer that is comprised of a carboxylate main chain as well as various types of polyethylene oxide (PEO) side chains.
Progresses in Synthesis of Polycarboxylate Superplasticizer
It was shown in Fourier transform infrared spectroscopy (FITR) that the molecular structure of modified polycarboxylate superplasticizer (MPCE) contained sulfonic acid groups, carboxylic acid groups, polyethylene oxide vinyl groups, and other groups and had comb-shaped molecular structure.
Synthesis and performance of a non-air entraining
Polycarboxylate type superplasticizers (PCEs) typically exhibit strong foaming action. In this study, a non-air entraining polycarboxylate polymer was prepared by grafting polyether amine pendant chains onto a MPEG PCE structure. The molecular properties, such as molar masses (Mw, Mn), the polydispersity index (PDI), and the conversion rate
A novel method for solving the impact of clay on concrete
The polycarboxylate superplasticizer (PCE) has become a key material in the preparation of high-performance concrete, self-compacting concrete and high-flowing pump concrete because it is added in small proportions and has a large dispersing capability, significant slump retention and adjustable molecular structure (Cerulli et al., Reference Cerulli, Clemente, Decio, Ferrari, Gamba, Salvioni
The Effect of Various Superplasticizers on Ultra High
Four different types of superplasticizers were used; two different PCE based superplasticizers from a leading manufacturer (PCE Name Brand 1, PCE Name Brand 2), one PNS superplasticizer, and one PCE superplasticizer (PCE Local Provider), both of which were provided by a local chemical provider.
- What is polycarboxylate superplasticizer (PCE)?
- As one important auxiliary, superplasticizers have attracted lots of attention in the concrete and building materials field. Specially, polycarboxylate superplasticizer (PCE) has been widely applied due to its relatively low doping amount, high water reducing rate and environmental friendliness property.
- 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 PCE compared to lignosulfonate based naphthalene based superplastic?
- Compared with the lignosulfonate and sulfonated naphthalene formaldehyde based superplasticizers, PCE was endowed with several special advantages including: 1) lower doping amount for higher water reducing rate ; 2) effectively keeping the slump of concrete without prolonging its setting time , .
- 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.
- Does PCE structure affect cement performance?
- The influence of PCE structure on performance is summarized. The differences between PCE sequence structure and connection mode on cement properties are discussed. As one important auxiliary, superplasticizers have attracted lots of attention in the concrete and building materials field.
- Is benzene ring a good superplasticizer?
- Compared with conventional superplasticizers, a new polycarboxylate superplasticizer (FPC) with benzene ring has low sensitivity to clays. Cement paste with FPC exhibited excellent initial flowability and less flowability loss even in the presence of clays.
