Results 231 to 240 of about 5,625 (250)

Characterization of Polycarboxylate‐Ether Based Superplasticizer on Cement Clinker Surfaces

Journal of the American Ceramic Society, 2012
The application of Ordinary Portland Cement ( OPC ) based binder is commonly improved by the addition of rheology modifying agents, i.e. superplasticizers. In this work the interaction between polycarboxylate‐ether based superplasticizers ( PCE s) and ...
Ferrari L., Bernard L., Deschner F., Kaufmann J., Winnefeld F., Plank J.   +5 more
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Compatibility of polycarboxylate superplasticizers with cements

2006
Superplasticizers are nowadays often used for ready-mix concrete, but also for other purposes in concrete technology. In most cases, without adding a superplasticizer to concrete, it is not possible to achieve the desired properties of fresh and hardened concrete. Properties of fresh concrete, such as slump, slump loss with time, segregation, bleeding,
Štirmer, Nina, Banjad Pečur, Ivana
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Research on the Grading Effect of Polycarboxylate Superplasticizer

Applied Mechanics and Materials, 2013
In this paper, polycarboxylate superplasticizer (PC) was separated by ultrafiltration to investigate function on dispersion of various portions of PC. It is found there is a grading effect on the dispersion and adsorption of polycarboxylate superplasticizer, through fluidity and adsorption experiments.
Zhi Kun Li, Jia Hui Peng
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Quality Control of Polycarboxylate Superplasticizer-Gel Permeation Chromatography

2020 International Conference on Artificial Intelligence and Electromechanical Automation (AIEA), 2020
The control variables were used to study the accuracy of the gel permeation chromatography method, and the changes in polymer molecular weight and molecular weight distribution were studied on different architectures. Then, GPC-molecular weight comparison is performed between the standard sample and the synthetic sample, and the result is compared with
Manyu Su, Lina Zhong, Yuanqiang Guo, Yuliang Ke, Yunhui Fang   +4 more
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The compatibility of polycarboxylate-type superplasticizers with cement

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2005
Four polycarboxylate-type (PC) superplasticizers of different functional groups were used; their dispersing and retaining behaviors were analyzed through ZETA potential measurement, mini-slump test of cement paste and performance test of concrete. The experimental results show that the dispersing and flow-retaining ability of PC was determined by two ...
Li Chongzhi, Wang Dongmin, Song Shaomin, Chen Jialong   +3 more
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Copolymerization Kinetics of Polyetyhylenglycol Allylether Type Polycarboxylate Superplasticizer

Advanced Materials Research, 2014
The free radical copolymerization kinetics of polyethylenglycol allylether (APEG) with acrylic acid (AA) had been studied in aqueous solution through using ammonium persulfate (APS) and 30% hydrogen peroxide (H2O2) as initiators. The structure of polycarboxylate superplasticizer had been characterized by IR and 1H-NMR.
Ying Feng Tian, Xia Ping Zhu, Ya Ting Deng, Kui Wang   +3 more
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Study on Synthesis of Polycarboxylate Superplasticizer at Room Temperature

Applied Mechanics and Materials, 2014
Use TPEG and AA , Through free radical polymerization in normal temperature conditions, Synthesis of the high-performance polycarboxylate superplasticizer. The results showed that, Room temperature synthesis of polycarboxylate superplasticizer with high temperature (60°C) synthesis of polycarboxylate superplasticizer have same performance.
Gang Wang, Ling Xun Liang
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Unlocking cementitious performance: nano‐lubrication via polycarboxylate superplasticizers

Journal of the American Ceramic Society
Abstract Polycarboxylate (PCE) superplasticizers are the most important additive in concrete, which can effectively improve the workability of cement slurry. Different from the traditional regarding of PCEs as dispersants, here, we understand the PCEs as nano‐lubricants.
Muhan Wang, Xiang Ji, Hegoi Manzano, Dongshuai Hou, Zongjin Li   +4 more
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Performance of an Advanced Polycarboxylate-Based Powder Superplasticizer

SP-217: Seventh CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete, 2003
Powder superplasticizers have been widely used for cement-based premixed-products, such as grout and repair materials. Naphthalene and melamine-based powder superplasticizers have been used for premixed-products. There are some problems wherein sufficient fluidity cannot be provided at low temperature range, when those conventional powder ...
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Synthesis of polycarboxylate superplasticizers for cement-sand paste

2018
Chemistry of molecular ...
Belov, D. A., Kuzmenkov, D. M., Velugo, Y. V.   +2 more
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