Relevant bibliographies by topics / Cement-in-polymer dispersion

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Cement-in-polymer dispersion'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Cement-in-polymer dispersion"

1

Cai, Yong, Pei Ming Wang, and Shi Yun Zhong. "Influence of Coagulation of Polymer Dispersion on the Properties of Polymer-Modified Mortar." Advanced Materials Research 1129 (November 2015): 162–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.162.

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The coagulation process of polymer dispersion in cement-based materials is different from that of the pure polymer dispersion during drying and film formation. This process is influenced by the various ions released from cement hydration and the interaction between polymer and cement grain in the water. This paper focuses on the coagulation of polymer dispersion during cement hydrating and the influence on the performances e.g. water absorption, flexural and compressive strength and bonding strength of cement mortar. Commercial anionic styrene-acrylate polymer dispersion was investigated in the coagulation process in the polymer-modified cement paste with polymer to cement ratio (p/c) from 5% to 20% and water to cement ratio of 0.3. The amount of coagulated polymer particles was measured by testing the solid content of the supernatant of the diluted polymer-modified cement paste for a period of time. The calorimetric property was measured by TAM AIR calorimeter. Water absorption and mechanical properties of the modified mortar were also measured according to the China standard. The result showed that the polymer dispersion mixing with cement was found to be coagulated in the very early stage under the low polymer to cement ratio, and the quantity of the polymer particles remained in the liquid is quite low within few minutes during this fast coagulation process. The fast coagulation process undermines the influence of polymer dispersion on the cement hydration and the heat evolution. But it has negative impact on the mechanical properties and water resistance. Adding of surfactant into the polymer dispersion extends the coagulation process and improves these performances.
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Wang, Ru, and Pei Ming Wang. "Hydration of Cement in the Presence of SBR Dispersion and Powder." Key Engineering Materials 466 (January 2011): 57–63. http://dx.doi.org/10.4028/www.scientific.net/kem.466.57.

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Hydration of cement in the presence of SBR dispersion and powder respectively was investigated using the methods of ITC, XRD and ESEM. The results show that both the dispersion and powder of SBR facilitate the formation, enhance the stability of AFt and inhibit the formation of C4AH13 in cement paste; the effect of the powder is more evident than the dispersion. Both the dispersion and powder of SBR delay the formation of C-S-H and Ca(OH)2 in cement paste, and the effect of the dispersion is more evident. Up to 3 days, the structure of the SBR dispersion – or powder – modified cement pastes has no significant difference with that of control paste except due to a thin polymer film on the surface. The two polymers delay the early cement hydration, but have no significant effect after 3 days.
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Wang, Ru, and Liang Zhang. "Mechanism and Durability of Repair Systems in Polymer-Modified Cement Mortars." Advances in Materials Science and Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/594672.

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This paper investigated the mechanism and durability of repair systems made of ordinary cement-based repair mortar and three kinds of polymer-modified repair mortars with old concrete, SBR dispersion, SAE dispersion, and SAE powder. By comparing the bonding properties of mortars before and after erosion, it was found that polymers could effectively improve the durability of the repair system and SAE powder had the best improvement. Micromorphology study of the repair mortar and the interface of repair mortar with old concrete through SEM showed that the polymer film formed from SAE powder whatever in the mortar or at the interface was dense and tough, the film formed from SAE dispersion was loose and weak, while the film formed from SBR dispersion was in between them, which explained the difference in the tensile bond strength and the durability of the repair systems.
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Shi, Xiao Xin, Ru Wang, and Pei Ming Wang. "Dispersion and Absorption of SBR Latex in the System of Mono-Dispersed Cement Particles in Water." Advanced Materials Research 687 (April 2013): 347–53. http://dx.doi.org/10.4028/www.scientific.net/amr.687.347.

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This paper investigates the dispersion of cement particles in water at different mix proportions using optical microscope, and the dispersion and absorption of SBR latex in the system of mono-dispersed cement particles in water using environmental scanning electron microscope (ESEM). The results show that the mono-dispersed cement can be well obtained at the water to cement ratio (mw/mc) of 10:1. The ESEM images present that SBR latex is dispersed on the surface of the cement particles as well as the solution phase. SBR latex does not prefer to be absorbed on the cement particles in spite of their opposite electric charge but chooses to be dispersed in the system proportionally. In addition, SBR particles are single-layer absorbed on the surface of cement particles in all the SBR latex to cement ratios (mp/mc). Several SBR particles absorbed on the surface of cement particle get close enough to form groups at the mp/mc of 15% and 20%. The results of this paper provide some bases for analyzing the influence of polymer on cement hydration and the microstructure formation of polymer-modified cement-based materials in a new view.
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Gruszczyński, Maciej. "Influence of Co-Polymer Dispersion Additives onto Shrinkage Strains for Cementitous Mortars and Concretes." Advanced Materials Research 287-290 (July 2011): 1097–101. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1097.

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In the paper there is presented the influence of different types of co-polymer dispersion additives onto the magnitude of shrinkage and strength properties of cement composites. The effect of application of such additives was compared and confronted with the action of widely used classical admixture reducing shrinkage based on multi-molecular alcohol (propylene alcohol). As a result of conducted tests the significant reduction in shrinkage strains and increase in bending strength was observed due to the application of co-polymer dispersion with the amount of at least 5% of the cement mass. Reduction of shrinkage and improvement of serviceability properties to great extent prejudge the technical attractiveness of co-polymer and cement materials for the cases of concrete structures repairs and constructing industrial floors without joints.
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Wang, Ru, Dao Xun Ma, and Pei Ming Wang. "Waterproof Performance of Polymer-Modified Cement Mortar." Advanced Materials Research 687 (April 2013): 213–18. http://dx.doi.org/10.4028/www.scientific.net/amr.687.213.

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This paper tested the capillary water absorption, impermeability and cracking of cement mortars modified with three polymers respectively and founded the correlation of cracking with the waterproof performance. The results show that with the polymer content increasing, especially as the polymer/cement ratio (mp/mc) increases from 0% to 5%, the reduction in the capillary water absorption and the penetration depth of water into mortar is significant. When the mp/mc is more than 15%, the increase of the mp/mc in all mortars has little effect on the capillary water absorption and the penetration depth. For the purpose of reducing the cracking weighted value, the styrene-butadiene rubber (SBR) dispersion and the styrene-acrylic copolymer (SAE) powder are superior to the SAE dispersion. Regardless what kinds of polymers, the capillary water absorption and the penetration depth of water into mortar show exponential growth with the increasing cracking weighted value.
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Jo, Young Kug, Seon Ho Jeong, and Wan Ki Kim. "Bond Strength of Polymer Cement Slurry-Coated Rebar Using EVA Latex in Cement Concrete." Advanced Materials Research 687 (April 2013): 175–84. http://dx.doi.org/10.4028/www.scientific.net/amr.687.175.

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Polymer cement slurry(PCS) made from organic polymer dispersion and cement has good adhesion to steel, waterproofness and acid resistance due to being of polymer films formed in the cement slurry. The purpose of this study is to evaluate the mix conditions such as coating thicknesses, curing ages and polymer-cement ratios of PCS-coating material effected on improvement in bond strength of rebar coated by PCS with EVA latex in cement concrete. The test pieces are prepared with four types of polymer-cement ratio, four types of coating thickness and four types of curing age, and tested for the bond strength test. From the test results, in general, bond strength of PCS-coated rebar is better than that of uncoated rebar and epoxy-coated rebar. It is also high bond strength at curing ages of 7-day or less, and coating thicknesses of 75 µm and 100 µm. The maximum bond strength of PCS-coated rebar at curing age of 3-hour is almost same as that of curing age of 1-day and 7-day. The maximum bond strength of PCS-coated rebar with EVA at polymer-cement ratio of 50%, and coating thickness of 100 µm is about 1.41 and 1.47 times respectively, the strength of uncoated rebar and epoxy-coated rebar. It is apparent that the curing age, coating thickness and polymer-cement ratio are very important factors to improve the bond strength of PCS-coated rebar to cement concrete. We can have basic information that it can replace epoxy coated rebar by the PCS-coated rebar with curing age at 3-hour and coating thickness of 100 µm.
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8

Domanskaya, I. K., and Ekaterina S. Gerasimova. "Portland Cement with Mineral Fillers and Polymer Additives." Solid State Phenomena 284 (October 2018): 1063–68. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.1063.

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This paper is devoted to the study of the hardening process and the mechanical properties of composite cements. There were three mineral additions and two polymer ones, namely fly ash, limestone meal and marble powder, polymer dispersion and redispersible polymer powder used. The principal possibility of combining mineral fillers in the design of composite cements is shown. It has been established that the samples of cement stone based on binders modified with redispersible polymer powder have higher compressive and flexural strength, regardless of the type of filler.
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Piotrowski, Tomasz, and Piotr Gawroński. "Chemical Resistance of Concrete-Polymer Composites – Comparison Based on Experimental Studies." Advanced Materials Research 1129 (November 2015): 123–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.123.

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One of the main advantage of Concrete-Polymer Composites (C-PC) in relation to Cement Concrete called Ordinary Concrete is its chemical resistance. There is no European standard for testing the chemical resistance of cement based concretes and C-PC. American standards ASTM provide varied concrete tests depending on exposure conditions and mechanisms of destruction of concrete structures but there is a lack of clear criteria for the evaluation of research results by these methods. There are also requirements for monolithic floors chemical resistance - ASTM C722-04 and the requirements of the standard EN 1504-2, but they involve coating materials and cannot be directly applied to the cement concrete and C-PC. The paper presents the experimental studies of chemical resistance of C-PC in relation to OC. The investigations has been made under different environment conditions. First the samples of Ordinary Concrete (OC), Polymer Concrete (PC-1) based on vinylester resin and Polymer-Cement Concrete (PCC-1) with polyacrylic dispersion used as a co-binder were immersed for a period of time up to 168 days in a distilled water, H2SO4, MgSO4, (NH4)2SO4 and mix of the mentioned. During the storage the pH was controlled. Additionally as a reference the samples were conditioned in a climate chamber (20°C, 60% RH). The compressive strength were tested after defined periods of time. Next experiment was performed on OC and three different PCC – first modified with synthetic latex, second with polyacrylic polymer dispersion and the last with epoxy resin. The samples were immersed in H2SO4 up to 90 days. Compressive strength and mass loss after 30 and 90 days of conditioning were measured. As a reference the water immersion was used. The results obtained in this experimental program showed high chemical resistance of Polymer Concrete. PC samples obtained continuous increases of compressive strength in all examined chemically aggressive environments. It is also confirmed higher chemical resistance of Polymer-Cement Concrete modified with vinylester resin in relation to Ordinary Concrete. The second part of the program showed that the best additive to PCC among poliacrylic dispersion, synthetic latex and epoxy resin was last one. Epoxy modified PCC samples obtained best results both in compressive strength and mass loss tests
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10

Kwiecień, Arkadiusz, Maciej Gruszczyński, and Boguslaw Zajac. "Tests of Flexible Polymer Joints Repairing of Concrete Pavements and of Polymer Modified Concretes Influenced by High Deformations." Key Engineering Materials 466 (January 2011): 225–39. http://dx.doi.org/10.4028/www.scientific.net/kem.466.225.

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Three kinds of repair methods of cracked concrete floors are presented in the paper. One of them, based on coating using of polymer-cement composites, is discussed with presentation of the influence of different amount of styrene-butadiene co-polymer dispersion additive onto the shrinkage and strength. The next two correspond to injecting repair methods. There are also presented two different approaches in repair bonding of damaged floors. Following these ideas, results of testing of epoxy and polymer (PU) bonding of cracked specimens made of concrete and polymer-cement composites are discussed. Proposed new repair polymer flexible joints introduce energy dissipaters which allow protecting concrete pavements against large deformations. Presented comparisons of results indicate that the use of flexible polymers in repair process is efficient, what was confirmed by tests and observations of repair done at the KRK airport concrete pavement.
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Dissertations / Theses on the topic "Cement-in-polymer dispersion"

1

Hojczyk, Markus, Oliver Weichold, and Martin Möller. "Grenzflächenanalyse und -design an kontinuierlichen Multifilament- Glasrovings beschichtet mit reaktiven Zement-in-Polymer Dispersionen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244042585741-01358.

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Die polymere Komponente in reaktiven Zement-in-Polymer (c/p) Dispersionen hat einen entscheidenden Einfluss auf die Bildung der Mikrostruktur von c/p beschichteten Rovings in Beton. Elektronenmikroskopische Untersuchungen zeigen für den gut wasserlöslichen Poly(vinylalkohol) Ca(OH)2- Ablagerungen an der Grenzfläche, während für das hydrophobe Poly(vinylacetat) ein Gefüge aus teilhydratisiertem Klinker gefunden wird. Durch eine zeitliche Verfolgung der Wasseraufnahme mittels kernmagnetischer Resonanzspektroskopie konnte dies auf Unterschiede im Quellungsverhalten als Resultat der unterschiedlichen chemischen Struktur und Reaktivität gegenüber Alkalien zurückgeführt werden.
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Book chapters on the topic "Cement-in-polymer dispersion"

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Ghosal, Mainak, and Arun KR Chakraborty. "An Experimental Study on the Influence of Polymeric Nano-TIO2 in Cement and Concrete for its Dispersion, Structural Characterization, Mechanical Properties, and its Performance Under Aggressive Environment." In Processing and Characterization of Multicomponent Polymer Systems, 213–34. Toronto : Apple Academic Press, 2019.: Apple Academic Press, 2019. http://dx.doi.org/10.1201/9780429469794-12.

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Conference papers on the topic "Cement-in-polymer dispersion"

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Mackevičius, Rimantas, Danutė Sližytė, Tatyana Zhilkina, and Vadim Turchin. "Investigation of influence of additives on properties of multi-molecular organic solutions used for permeation grouting." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.112.

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Permeation grouting for stabilization of dispersive sandy and gravely soils is in use from beginning of 19th century and has high importance for various underpinning, tunneling, and structural strengthening works. As materials for permeation grouting are applied not only cement mortar or silica gel in many compositions but multi-molecular organic solutions too. From multi-molecular organic solutions for permeation grouting are in use various synthetic resins such as acrylic, urea-formaldehyde, or other polymer resins. Urea-formaldehyde resin has right physical and mechanical properties for applying in soil stabilization but additives can change these properties. For example, additives can increase density, pH-rate, and gel-formation time of urea-formaldehyde resin. Additives can decrease viscosity of solutions based on urea-formaldehyde resin. Additives can improve environmental aspects of use of multi-molecular organic solutions for grouting of sandy soils. Long-time investigations of influence of additives on properties of multi-molecular organic solutions used for soil stabilization give good results for optimization of composition of materials for grouting.
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