The effect of superplasticizers on the mechanical performance
Two types of superplasticizer were used: a current one henceforth called SP 1, whose chemical basis is lignosulfonate, with additions; a high-performance superplasticizer, henceforth called SP 2, whose chemical basis is a combination of modified polycarboxylates in an aqueous solution.
High-performance superplasticizer based on chitosan
Using natural biopolymer chitosan to develop a high-performance superplasticizer has certain advantages in structure, resource, and cleaner production. 2. A high-performance superplasticizer should have not only a high water-reducing ratio but also the capacity to regulate the cement hydration reaction and products.
Effect of diester in esterification product of polyethylene
Polyacrylate superplasticizer PCs: Polycarboxylate superplasticizer PEG: Polyethylene glycol AA: Acrylic acid PEGmA: Polyethylene mono-acrylate PEGdA: Polyethylene glycol di-acrylate RP-HPLC: Reversed phased high performance liquid chromatography FCP: Fluidity of cement paste GPC: Gel permeation chromatography M w : Weight average molecular weight
Effect of Superplasticizer Type on the Performance of High
The better performance of the AP superplasticizer, in terms of compressive strength, was obtained at early and later ages independently of the curing temperature (5 and 20°C) and the fineness of
Concrete Water Reducer - Superplasticizers
7. Since the dosage of polycarboxylic acid superplasticizer is very small, the water reduction rate is high. The use of polycarboxylic acid superplasticizers to prepare various types of high-performance concretes above C45 can greatly reduce project costs and has significant technical and economic benefits; it is used to prepare concrete below C45, although the cost of polycarboxylic acid
- Do superplasticizers affect the performance of UHPC?
- In the present study, the influence of superplasticizers on the performance of UHPC has been examined through fresh and hardened properties. Different types of superplasticizers such as SNF based—Hi-plast S50, SMF based—BPC—M20, and PC based—Master Glenium 51 were used.
- Why is the development of New and high-performance superplasticizers important?
- Therefore, the development of new and high-performance superplasticizers is crucially important for the concrete industry worldwide.
- What is a superplasticizer (PC)?
- PC consists of a family of products with different chemical structures and acts as a single unit. Generally, all superplasticizers are synthetic polymers, and each type possesses varying characteristics including the percentage of water reduction, retardation, molecular weight, chemical substitution, and cost.
- What is chitosan superplasticizer?
- 1. A high-performance superplasticizer may be prepared using the biopolymer chitosan as a raw material by chemical modification. The chitosan superplasticizer has a stronger and more stable dispersion force and high water-reducing ratio. Chitosan superplasticizer exceeds PCs with regard to retarding effect.
- What are superplasticizers and how do they work?
- Superplasticizers are powerful water reducers that enable an increase in the ultimate stress of concrete by decreasing the w/c ratio, a decrease in the cement content while maintaining the same range of strength or workability, an increase in concrete compacity, and other effects [30].
- How many types of superplasticizers are there?
- Superplasticizers are of four types as Sulphonated Naphthalene Formaldehyde (SNF), Sulphonated Melamine Formaldehyde (SMF), Sulphonated Acetone Formaldehyde (SAF), and Polycarboxylate Ether (PC). SNF is obtained from coal tar/petroleum naphthalene where it is converted into sulphonated at high temperature in concentrated sulfuric acid.
