FOHG FRQFUHWH - Institute of Physics
The polycarboxylate-based superplasticizer with water reduction rate of 33.8% was used. Table 1. Chemical compositions of cement and fly ash. Raw Materials Chemical compositions (%) CaO SiO2 Al2O3 Fe2O3 MgO L.O.I SO3 Cement 65.52 22.45 4.49 4.13 1.47 1.00 0.94 Fly ash 3.23 54.26 26.37 12.56 0.74 0.86 0.49 Table 2.
HV6128 - Institute of Physics
concrete raw materials during the application process, especially in low temperature construction in winter, the phenomenon of lagging bleeding in concrete with polycarboxylate superplasticizer is very common, this puts higher requirements on the performance of polycarboxylate superplasticizer[5-6].
Tolerance of Clay Minerals by Cement: Effect of Side-Chain
Polycarboxylate superplasticizer (PCE) is a widely used water-reducing agent that can reduce significantly the water demand of concrete, which reduces the porosity and enhances the strength and durability of the concrete. (The PCE consists of a single backbone with many long PEO side chains.) Generally, aggregate occupies >70 wt.% of concrete; clay minerals are ubiquitous in nature and are
Investigating the effect of polycarboxylate-ether based
There is limited measure available to quantify the effect of polycarboxylate-ether based superplasticizer (PCE) on the microstructure of cement-based systems during the first 24 h. To fill this gap, the backscattered electron image analysis (BSE-IA) alongside the ternary technique is used in this study to separate composed phases quantitively and then calculate the average spacing between
Reactivity of cemented paste backfill containing polycarboxylate-based
This paper presents findings from experimental investigations on the effects of polycarboxylate superplasticizers (PCSP) on the reactivity of CPB containing pyrite. The reactivity of cured CPB...
- How is polycarboxyl-ate superplasticizer synthesized?
- On the basis of the results mentioned above, polycarboxyl-ate superplasticizer was synthesized via a two-step process using polyethylene glycol, sodium sulfonate methacrylate and acrylic acid as raw materials. First, the esterification of polyethylene glycol and acrylic acid was carried out to get an esterfied macromonomer.
- Are polycarboxylate superplasticizers effective as dispersants in cement paste?
- A kind of polycarboxylate superplasticizer with allyl alcohol polyethylene glycol, maleic anhydride and methacrylic acid sulfonic sodium as main raw materials has been synthesized. Their relative effectiveness as dispersants was evaluated in cement paste by measuring paste fluidity.
- 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).
- Can comb-like polycarboxylate superplasticizer be synthesized by ATRP method?
- Based on the obtained results, the following conclusions can be drawn: 1. A comb-like polycarboxylate superplasticizer with relatively uniform polymer species (A-CPCE) was successfully synthesized by ATRP method.
- Does polycarboxylate superplasticizer alter dispersion and water-reducing effects?
- Polycarboxylate superplasticizer, synthesized using different methods, may alter dispersion and water-reducing effects. The synthesis of PCE involves creating a novel macromolecular monomer with a controllable molecular mass, adjustable lipophilic, and hydrophilic moieties, as outlined in this study.
- What is the difference between polycarboxylate superplasticizer and hydroxyl group?
- The polycarboxylate superplas-ticizer, which had suitable graft and block polymers of poly-ethylene glycol or polyoxyethylene, and a suitable sulfonic group, had small slump loss besides high water-reducing performance. On the other hand, the hydroxyl group at the end of the chain causes gelation easily.
