Research progress on polycarboxylate based superplasticizers
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.
A polycarboxylate as a superplasticizer for montmorillonite
A novel polycarboxylate superplasticizer (PCE) with a long polyoxyethylene (PEO) chain and a terminal carboxylic group was synthesized from a modified polyether (SAE-IPEG) to increase its performance in cement. The molecular structure of the PCE was characterized by infrared spectroscopy and 1 H nuclear magnetic resonance (NMR) spectroscopy
Synthesis and optimization of a montmorillonite-tolerant
Polycarboxylate superplasticizer (PCE) is sensitive to the clay present in concrete aggregates. In particular, Montmorillonite (Mnt), an impurity inevitably contained in the aggregate, can significantly influence the performance of concrete.
Synthesis and Optimisation of a Montmorillonite
Wuhan University of Technology Abstract and Figures Polycarboxylate superplasticizer (PCE) is sensitive to the clay present in concrete aggregates. In particular, Montmorillonite (Mnt), an...
Effects of polycarboxylate superplasticizer equipped with β
Then β-P was employed to synthesize a polycarboxylate superplasticizer with β-CD grafted on the side chain [PAA-g-(β-P) n HPEG]. The functional groups, molecular weights, and molecular weight distributions of synthesized copolymers PAA-g-(β-P) n HPEG were characterized by Fourier transform infrared spectra (FT-IR), 1 H nuclear magnetic
- What is a polycarboxylate superplasticizer?
- A novel polycarboxylate superplasticizer (PCE) with a long polyoxyethylene (PEO) chain and a terminal carboxylic group was synthesized from a modified polyether (SAE-IPEG) to increase its performance in cement. The molecular structure of the PCE was characterized by infrared spectroscopy and H nuclear magnetic resonance (NMR) spectroscopy.
- What are the advantages of polycarboxylate superplasticizer (PCE)?
- Log in 1. Polycarboxylate superplasticizer (PCE), a new generation superplasticizer, has the advantages of molecular design potential, [1–3] high water reduction, and good slump retention. [4–6] Therefore, ...
- Can polycarboxylate superplasticizers lower clay sensitivity?
- This study offered a new idea in designing polycarboxylate superplasticizers to lower their clay sensitivity. The authors report no declarations of interest. Thanks for the financial support from the National Natural Science Foundation of China (51961135202). Forgot password?
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- What is the adsorption of polycarboxylate poly(ethylene glycol) esters on montmorillonite (m?
- Adsorption of polycarboxylate Poly (ethylene glycol) (PCP) esters on Montmorillonite (Mmt): effect of exchangeable cations (Na +, Mg 2 + and Ca 2 +) and PCP molecular structure
- Can SAE-PCEs containing carboxyl terminal group adsorb on clay particles?
- Schematic illustration of the adsorption of SAE-PCEs containing carboxyl terminal group on clay particles. Polycarboxylate superplasticizers (PCE) with terminal carboxyl groups have been synthesized successfully from free radical copolymerization reactions. Synthesized PCEs were characterized by FT-IR and H NMR spectroscopy.
- Does terminal carboxyl in PEO chain enhance dispersing ability of cement toward Clay?
- These results demonstrated that terminal carboxyl in the PEO chain enhanced dispersing ability of cement toward clay dramatically due to presence of terminal hydroxyl group compared to conventional PCEs with terminal hydroxyl groups. shows the dispersion retaining capacities of PCE and three types of SAE-PCE to cement paste containing 3.0 wt% Mmt.
