Research on the mechanism of polymer latex modified cement

Wang, Min; Wang, Rumin; Yao, Hao; Farhan, Shameel; Zheng, Shao-Fei; Wang, Zhujun; Du, Congcong; Jiang, Hao

doi:10.1016/j.conbuildmat.2016.02.117

Cited by 143 publications

(54 citation statements)

References 26 publications

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“…Polymer-modified cement mortar (PCM) is superior to ordinary cement mortar in terms of strength, durability, chemical resistance, and workability and is widely used for repairing and strengthening reinforced concrete (RC) structures [1][2][3][4]. In earlier studies, PCM has shown different physical and mechanical properties than those of ordinary inorganic cement mortar and concrete because PCM is a mixture of polymeric organic material and cement mortar [5][6][7]. Considering the maintenance of RC buildings and the use period of the structures, the change in the physical properties of the PCM when exposed to high-temperature environments, such as fires, should be evaluated [8,9].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature

et al. 2019

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A polymer-modified cement mortar (PCM) is widely used as a repair material for reinforced concrete (RC) structures owing to its excellent strength and durability. However, considering the maintenance of the RC structures and the use period of the structures, the change in the physical properties of the PCM should be evaluated when exposed to various high-temperature environments, such as fires. In this study, the degradation of the mechanical properties (compressive strength and modulus of elasticity), thermal decomposition of the PCM in various high-temperature environments, and the change in the pore structure of the PCM after exposure to high temperatures were quantitatively investigated. A mechanical property evaluation of PCM was performed under three heating conditions: (i) heating in a compression tester, (ii) heating the specimen in an oven to a predetermined temperature and then moving it to a compression tester preheated to the same temperature, and (iii) cooling to room temperature after heating. In the experiment, a PCM specimen was prepared by changing the polymer–cement ratio (polymer content) of ethylene-vinyl acetate (EVA), the most commonly used polymer, to perform a high-temperature sectional test from 200 to 800 °C. In addition, to investigate the change in the PCM mechanical properties in the high-temperature region, in terms of the pyrolysis of EVA, the porosity change and mass change were examined using thermal analysis and mercury intrusion porosimetry. Before heating, the compressive strength of the PCM increased with the EVA content up to 10 % of the polymer–cement ratio. Under the cooling conditions after heating up to 200 °C, the mechanical performance of the PCM was restored, whereas the degradation of the mechanical properties of the PCM without cooling was more pronounced. Furthermore, the mass loss, heat flow, and the total porosity of the PCM increased as the EVA content increased, which is correlated with the degradation of the mechanical properties of the PCM.

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Section: Introductionmentioning

confidence: 99%

Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature

et al. 2019

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“…In this field of research if desirable conditions did not satisfy operational conditions, remaining experiments should be carried out on the new optimized slurry cement. Therefore, as a final step, FMA3 and tri-axial attempts were conducted for adequacy of results [19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Improvement in gas migration reduction in oil wells by using nanoparticles: an experimental investigation

Bayanak

Zarinabadi

Shahbazi

et al. 2020

Eurasian Chem. Commun.

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In recent years, improving the quality and composition of cement slurry has been one of the most important challenges for researchers and oil and gas well drilling industries. It has been demonstrated that, nanoparticles have made some progresses in the operational characteristics of the conventional cement. This research, via 13 experimental attempts, revealed a great improvement in compressive strength and rheological properties of the cement slurry after addition of silicon dioxide nanomaterial to the slurry. However, it did not make any significant change in the free water content of the cement and fluid loss. In the case of static gel strength analyzers (SGSA) test, transient time followed a decrementing pattern by increasing nanoparticle percentage. As a result, it met the vital goal in drilling industry via deep reduction in gas migration rate, solving the foregoing problem without having any negative effects on the other properties of the cement slurry such as thickening time. Moreover, the Mohr circles analysis demonstrated that, higher compressive strengths were achieved.

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“…Thus, the RPCC ma-terials are also called a polymer modified mortar or a polymer modified concrete. Compared with ordinary cementitious materials, the RPCC has better durability, cementitiousness and toughness, which is mainly used as a functional mortar (or a concrete) or a building adhesive [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Tensile Properties of a Flexible Polymer-Cement Composite Containing Portland Cement and Vae Emulsion

Bai¹

2019

Ceramics - Silikaty

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The aim of this paper is to investigate the tensile properties of a flexible polymer-cement composite (FPCC) which was mainly prepared by vinyl acetate-ethylene copolymer emulsion and Portland cement. An orthogonal experiment design was used to investigate the effects of the powder-emulsion ratio, the cement ratio and the filler type on the basic tensile indicators including the elastic recovery ratio, the tensile strength, the critical tensile strain, the tensile modulus and the elongation at the break. The results indicate that the major influence factors for the tensile properties of the FPCC are the powder-emulsion ratio and the cement ratio. With an increase in these two parameters, the tensile strength and the tensile modulus increase and the elastic recovery ratio, the critical tensile strain and the elongation at the break decrease. Furthermore, for the tensile strength and the tensile modulus, the influence of the cement ratio is more significant than the powder-emulsion ratio, and this is reversed for the case of the elastic recovery ratio, the critical tensile strain and the elongation at the break. The effect of the filler type on the FPCC is far less than the other two factors although its F test results are significant. An FPCC added with ground calcium carbonate exhibits a relatively higher tensile strength and tensile modulus. An FPCC added with a quartz powder has a better deformation ability.

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Research on the mechanism of polymer latex modified cement

Cited by 143 publications

References 26 publications

Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature

Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature

Improvement in gas migration reduction in oil wells by using nanoparticles: an experimental investigation

Tensile Properties of a Flexible Polymer-Cement Composite Containing Portland Cement and Vae Emulsion

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