Synthesis and Properties of a Polycarboxylate
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
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.
Polymer Additives for Cement Systems Based on Polycarboxylate
A concept for a polycarboxylate superplasticizer possessing enhanced clay tolerance. Cem. Concr. Res. 42(10), 1299–1306 (2012) CrossRef Google Scholar Schrfl, C., Gruber, M., Plank, J.: Preferential adsorption of polycarboxylate superplasticizers on cement and silica fume in ultra-high performance concrete (UHPC). Cem. Concr.
RX7452 FinalPaper 2015-10-19 14.45.06 ZMPCAZ - Atlantis Press
Polycarboxylate superplasticizer is an indispensable material in modern civil and architecture engineering as it embodies many important properties such as improving structure and strength of concrete, enhancing uniformity of the internal structure of concrete, reducing possible interface defects in concrete and improving corrosion resistance of
Polyether macromonomer HPEG/TPEG/APEG - LinkedIn
The concrete prepared with polyether large single system has excellent durability and frost resistance, and has been widely used in high-speed railway, subway engineering, expressway super...
- Can Apeg be used to make polycarboxylate superplasticizers?
- The preparation of polycarboxylate superplasticizers using APEG only requires solution polymerization under normal pressure with co-polymer monomers. However, APEG has poor polymerization properties, resulting in a high amount of monomer residue and instability in the performance of the produced superplasticizers.
- Which polycarboxylate superplasticizer has different molecular structures?
- Abstract. Two kinds of slump-retaining polycarboxylate superplasticizer with different molecular structures were synthesized via maleic anhydride(MAH), polyethylene glycol monoallyl ether(APEG) and hydroxyethyl acrylate (HEA)/ethyl acrylate (EA) according to molecular structure design principle.
- Is Apeg a good polymer?
- However, APEG has poor polymerization properties, resulting in a high amount of monomer residue and instability in the performance of the produced superplasticizers. Currently, the production volume of APEG is decreasing year by year.
- Is MPEG a polycarboxylate superplasticizer?
- MPEG was one of the early large monomers used in the production of polycarboxylate superplasticizers. Its synthesis requires two steps: esterification and polymerization, making the process relatively complex.
- Which polycarboxylate superplasticizer has better slump retention capacity?
- The results show that under the same test conditions and the same dosage, the synthesized polycarboxylate superplasticizer PC-1 has better slump retention capability and compressive strength than PC-2.
- How are polycarboxylate superplaticizers synthesized?
- Synthesis of the polycarboxylate superplaticizers Ammonium persulfate (APS) and H2O were weighed and added into a three-necked flask containing polyethylene glycol monoallyl ether(APEG) and stirred and heated in water bath.
