effect of polycarboxylate superplasticizer on properties
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
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Effect of the superplasticizer type on the properties of
Nov 15 2014 · Polycarboxylates were found to have to higher efficiency in improving the hydration heat evolution setting time and mechanical properties of cement than that of traditional superplasticizers SMF and SNF. Addition to control fly ash blended cement polycarboxylate ether-based superplasticizer gives cement CEM II/A-V 52.5N.
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Effects of clay on properties of polycarboxylate
Dec 18 2015 · The influence law of clay on mortar fluidity mixed with polycarboxylate superplasticizer was studied. Several methods of inhibiting clay adsorption of polycarboxylate superplasticizer were discussed. The experimental results show that clay has significant effect on the dispersion of polycarboxylate superplasticizer and montmorillonite clay has more significant impact on mortar
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Effects of the Carboxyl Density on the Properties of
The effect of carboxyl density (the ratio of acrylic acid and polyoxyethylene ether) upon the performance molecular weight and monomer conversion rate of polycarboxylate (PCE) were investigated by slump test Gel Permeation Chromatography (GPC) and High Performance Liquid Chromatography (HPLC) respectively. The results showed that with carboxyl density increased from 2 1 to 7 1 molecular
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SuperplasticizerWikipedia
The polymers that serve as plasticizers exhibit surfactant properties. They are often ionomers.They function as dispersants to minimize particle segregation (gravel coarse and fine sands). The negatively charged polymer backbone adsorbs on the positively charged colloidal particles. However their working mechanisms lack a full understanding revealing in certain cases cement-superplasticizer
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Effects of polycarboxylate superplasticizer on rheological
1 day ago · As one of the main materials for grouting repair the workability of natural hydraulic lime (NHL) has been concerned widely. In this paper effects of
Chat OnlineSynthesis and Properties of a Polycarboxylate
Polycarboxylate superplasticizers (PCEs) are comb-shaped polymers with an anionic backbone and several nonionic pendant chains which typically are comprised of polyethylene glycols. In this study the synthesis of a new type of superplasticizer is presented which does not exhibit the typical comb-shaped form of PCEs but is built up from a linear polyetheramine and a hyperbranched
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Effect of cross‐linked polycarboxylate‐type
Effect of cross‐linked polycarboxylate‐type superplasticizers on the properties in cementitious system properties of the new SPs in cement paste were compared to those of traditional ones without cross‐linking agents. Xiuju Lin Bing Liao Synthesis and performance of a novel amphoteric polycarboxylate superplasticizer with
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Effects of polycarboxylate superplasticizer on rheological
1 day ago · As one of the main materials for grouting repair the workability of natural hydraulic lime (NHL) has been concerned widely. In this paper effects of
Chat OnlineEffect of hyperbranched polycarboxylic acid
Jan 15 2021 · Comb-like polycarboxylate is a superplasticizer possessing high water-reducing rate and excellent molecular design and has been widely used in the concrete industry. Most of the researches mainly adjust the effect of the superplasticizer by improving the groups on the superplasticizer molecular chain but few studies are carried out by
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EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER ON
ing on the superplasticizer type amount and mode of use 12 . This work aimed to investigate the influence of PCS and silica fume on the electrical conductivity rheology and hydration characteristic of cement pastes. Original papers Ceramics − Silikáty 50 (1) 5-14 (2006) 5 EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER
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Preparation of polycarboxylate-based superplasticizer and
Oct 15 2015 · A series of polycarboxylate-based superplasticizers (PCs) with different structures were synthesized and the effects of chemical structure on zeta potential and rheological property of cement paste were studied. Residual monomers in each sample of PCs were quantitatively determined. The property of the polymers in cement was tested by micro-electrophoresis apparatus and R/S rheometer.
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Synthesis and Properties of a Polycarboxylate
Polycarboxylate superplasticizers (PCEs) are comb-shaped polymers with an anionic backbone and several nonionic pendant chains which typically are comprised of polyethylene glycols. In this study the synthesis of a new type of superplasticizer is presented which does not exhibit the typical comb-shaped form of PCEs but is built up from a linear polyetheramine and a hyperbranched
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(PDF) EFFECT OF SIKA VISCOCRETE ON PROPERTIES OF CONCRETE
2. R Gagn A Boisvert M Pigeon (1996) ―Effect of superplasticizer dosage on mechanical properties permeability and freeze-thaw durability of high-strength concretes with and without silica fume‖. 3. MYA Mollah WJ Adams R Schennach (2000) ―A review of cement–superplasticizer interactions and their models‖.
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Synthesis and Properties of a Polycarboxylate
Polycarboxylate superplasticizers (PCEs) are comb-shaped polymers with an anionic backbone and several nonionic pendant chains which typically are comprised of polyethylene glycols. In this study the synthesis of a new type of superplasticizer is presented which does not exhibit the typical comb-shaped form of PCEs but is built up from a linear polyetheramine and a hyperbranched
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EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER ON
ing on the superplasticizer type amount and mode of use 12 . This work aimed to investigate the influence of PCS and silica fume on the electrical conductivity rheology and hydration characteristic of cement pastes. Original papers Ceramics − Silikáty 50 (1) 5-14 (2006) 5 EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER
Chat OnlineEffects of clay on properties of polycarboxylate
Dec 18 2015 · The influence law of clay on mortar fluidity mixed with polycarboxylate superplasticizer was studied. Several methods of inhibiting clay adsorption of polycarboxylate superplasticizer were discussed. The experimental results show that clay has significant effect on the dispersion of polycarboxylate superplasticizer and montmorillonite clay has more significant impact on mortar
Chat Online(PDF) Influence of superplasticizers on the hydration of
A commonly used comb-like polycarboxylate superplasticizer (PCE) and linear copolymers (PAS) of acrylic acid (AA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) with varied monomer ratio
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Advantages and disadvantages of polycarboxylate water
The effect is remarkable which can reduce the shrinkage of concrete and the technical properties of extremely low harmful substances which gives the concrete excellent workability good strength development excellent durability and good performance of polycarboxylate
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Effect of molecular weight of slow-release Polycarboxylate
Effect of molecular weight of slow-release Polycarboxylate Superplasticizer on the properties of cementitious system Open PDF. Advances in Cement Research Effect of molecular weight of slow-release Polycarboxylate Superplasticizer on the properties of cementitious system Authors Jinzhi Liu. x. Jinzhi Liu. Search for articles by this author
Chat Online(PDF) Effect of Re-Dosing Superplasticizer to Regain Slump
Effect of re-dosing of SP3 to regain original slump 3.3 Effect on Compressive Strength The compressive strength of concrete after first dosage of superplasticizer is shown in table 5. The compressive strength of superplasticized concrete was found to be higher than that of control mix prepared without addition of superplasticizer.
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(PDF) Effect of polycarboxylate superplasticizer on
In this study the effect of three types of powder polymer water reducer (WR) superplasticizer on the fluidity rheological properties density and mechanical properties of cement were investigated.
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EFFECT OF SUPERPLASTICIZER ON PROPERTIES OF MORTAR
and Dogan (1999) carried out a study on the effect of an N-vinyl copolymer superplasticizer on the properties of fresh and hardened concretes. Workability of concrete was measured by slump flow test and in situ tests were undertaken to find out the pumping ability of
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What Is The Role and Advantage of Polycarboxylate
Jan 17 2020 · It is a cement dispersant used in cement concrete applications. Polycarboxylate concrete superplasticizer is widely used in roads bridges dams tunnels high-rise buildings and other projects. This article mainly introduces the role and advantages of polycarboxylate superplasticizer.
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EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER ON
ing on the superplasticizer type amount and mode of use 12 . This work aimed to investigate the influence of PCS and silica fume on the electrical conductivity rheology and hydration characteristic of cement pastes. Original papers Ceramics − Silikáty 50 (1) 5-14 (2006) 5 EFFECT OF POLYCARBOXYLATE SUPERPLASTICIZER
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Effect of superplasticizers on the properties of latex
Aug 10 2018 · The delayed setting times of the poly-carboxylate superplasticizer may be attributed by the adsorption of the carboxylic group of the superplasticizer with the calcium ions of gypsum plaster. This adsorption of poly-carboxylate molecules on the gypsum surface is in the form of chemisorptions that hinders the formation of gypsum crystals.
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Effects of the Chemical Structure on the Properties of
This polycarboxylate-based superplasticizer has long chains and side chains which can adsorb on the surface of the cement particle and produce an electrostatic repulsive effect which causes the
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Effect of Side Chain Length on Polycarboxylate
The side chain length of a superplasticizer is a key factor affecting steric hindrance. Many researchers have suggested that the steric hindrance resulting from the PCE side chain on the particle surfaces affecting the dispersion behavior in the system 9 13 14 15 .These studies showed the dispersion performance of PCE in the systems by various experiments.
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Effect of molecular weight of slow-release Polycarboxylate
In order to improve the fluidity retention performance of cement monomers containing ester groups were introduced into slow-release polycarboxylate superplasticisers (PCEs). Four slow-release PCEs with different molecular weights (Mw) were synthesised through aqueous free radical polymerisation.
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Effects of the Chemical Structure on the Properties of
This polycarboxylate-based superplasticizer has long chains and side chains which can adsorb on the surface of the cement particle and produce an electrostatic repulsive effect which causes the
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