Optimization of material characteristics of macro-defect free cement

Ekincioglu, Ozgur; Özkul, M. Hulusi; Struble, Leslie J.; Paţachia, Silvia

doi:10.1016/j.cemconcomp.2011.11.003

Cited by 38 publications

(10 citation statements)

References 36 publications

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“…In the polyvinyl alcohol/acetate co-polymer a hydrolysis of the acetate groups takes place. The liberated acetate groups react with Ca 2+ cations in the liquid phase resulting in calcium acetate precipitation, Ca 2p 3/2 spectrum with component at 347.45 eV, which is consistent with the expected reaction mechanism [9,11]. The NIST database [25] unfortunately does not include the measured spectra of calcium acetate, but only of calcium(II) formiate with binding energy of Ca 2p 3/2 at 347.40 eV.…”

Section: Resultssupporting

confidence: 57%

“…The crumbly mixture of cement, polymer and water is subjected to the twin roll mixer which rapidly produces rubbery, cohesive dough usable for further processing. The high-shear mixing intensity could be well controlled by gap and speed of two rollers [11]. At the beginning, researchers supposed that the highshear mixing is used only to eliminate macrodefects (large pores and air voids) from the paste, but further development confirmed, that the high-shear mixing also induces chemical interactions between the polymer and the inorganic cement [12].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed chemical reaction mechanism is illustrated in Fig. 1 [9,11]. The irreversible confirmation of these bonds is the main objective of this study.…”

Section: Introductionmentioning

confidence: 99%

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XPS characterization of polymer–monocalcium aluminate interface

Kalina¹,

Másilko²,

Koplík³

et al. 2014

Cement and Concrete Research

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Section: Resultssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

XPS characterization of polymer–monocalcium aluminate interface

Kalina¹,

Másilko²,

Koplík³

et al. 2014

Cement and Concrete Research

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“…Especially, very high flexural strengths, 20 or 30 times higher than conventional cement pastes, were easily obtained. The reasons for obtaining such high strengths and superior properties are very low water/cement ratio, crosslinking between polymer and cement, and the unique composition and production process [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO2 Addition on the Properties of Macro Defect Free Cement-Polymer Composites

Ekincioglu

Özkul

Paţachia

et al. 2013

Restoration of Buildings and Monuments

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Macro-defect free (MDF) cement is a cement-polymer composite with superior flexural strength although produced by mixing cement with small amounts of polymer and water. Special production technique and the crosslinking occurred between cement and polymer are important factors for obtaining such high strengths. However, MDFs lose considerable strength when exposed to water. The objective of this study was to explore the effects of TiO 2 addition on flexural strength and water sensitivity of MDF. In this study, MDF cements were produced by adding up to 4 % TiO 2 by weight of cement. Biaxial flexural test as well as Atomic Force Microscopy (AFM) and Fourier Transform Infrared Spectroscopy (FTIR) tests were conducted in order to investigate the effect of TiO 2 addition. TiO 2 addition improved the water resistance of MDF cements in some batches, especially with 2 % addition possibly due to the C PVA -O-Ti-O-C PVA bond and this cross-linking mechanism together with C PVA -O-Al-O-C PVA bonds cause a more stable polymer network.

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“…Eventually, the Me-O-Ti-O-Me (Me is cement hydrates) bond make cement hydrates form a more stable network [27][28][29], as is shown in Figure 7b. These microstructure analysis results validating fully that the strength promotion of SAC pastes is related to the above compressive strength result.…”

Section: Sem Analysismentioning

confidence: 99%