From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete

In the field of construction, sustainable building materials are currently undergoing a process of technological development. This study aims to contribute to understanding the behavior of the fundamental properties of concretes prepared with recycled coarse aggregates that incorporate a polyethylene terephthalate (PET)-based additive in their matrix (produced by synthesis and glycolysis of recycled PET bottles) in an attempt to reduce their high porosity. Techniques to measure the gas adsorption, water porosity, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to evaluate the effect of the additive on the physical, mechanical and microstructural properties of these concretes. Porosity reductions of up to 30.60% are achieved with the addition of 1%, 3%, 4%, 5%, 7% and 9% of the additive, defining a new state in the behavioral model of the additive (the overdosage point) in the concrete matrix; in addition, the porous network of these concretes and their correlation with other physical and mechanical properties are also explained.

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“…For the specific case of open porosity, the RR has a blocking effect [64] on the hardened RPC, which translates into small increases in density.…”

Section: Resultsmentioning

confidence: 99%

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

et al. 2017

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“…In addition, owing to cement hydration, additional forces may be exerted on the water of the polymer particles. Extra water withdrawal results in more closely packed polymer particles, and coalescence can take place at even lower temperatures [18]. Furthermore, the combined water content of the cement pastes premixed with the polymer blends increases with the increase in the ratios of PVA in the polymer blends.…”

Section: Chemically Combined Water Contentmentioning

confidence: 99%

Studying physico-mechanical properties of cement pastes in presences of blend polymer as chemical admixtures

Negim

Yeligbayeva

Niyazbekova

et al. 2015

IJBAS

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Physico-mechanical properties of cement pastes were studied by setting time, combined water, compressive strength, SEM as well as porosity in presence of blend polymers. Blend polymers were used based on polyvinyl alcohol and carbamide with blend ratios 20/80, 40/60 and 80/20 respectively. The addition of blend polymers to cement pastes affected the physico-mechanical properties of cement pastes. As the content of carbamide in the polymer blends decreased, the water of consistency decreased, whereas the setting times (initial & final) were elongated. The combined water content and compressive strength of the hardened cement pastes were increased at all ages of hydration. The SEM images showed that the addition of these polymers to cement material improves the dispensability and workability of cement pastes.

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“…Polymer impregnation concrete technology was occurred too complicated and over costed. The top position PCC owes to the Integrated Model of Microstructure Formation (IMMF), which has been recently elaborated [8]. It gives the good evidence that C-PCs (PCC, at least) come of age and the" material model of microstructure formation "is used for rational application.…”

Section: How the C-pc Make Progress?mentioning

confidence: 99%

Concrete-polymer Composites: Trends Shaping the Future

Czarnecki

2007

Int. J. Soc. Mater. Eng. Resour

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The paper presents the state of knowledge and technology on the concrete-polymer composites (C-PC) and the prospects of their development. We can formulate a general thesis: the future of C-PC lies not only in technology, but also in ability to manage it. New arrangement of the research facts-new understanding of the nature of the material and the thrust for further development in application and theory are the present expectations. There are many old questions about material selection, its usability, compatibility and durability. The new questions are about material model.

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From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete

Cited by 110 publications

References 2 publications

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

Studying physico-mechanical properties of cement pastes in presences of blend polymer as chemical admixtures

Concrete-polymer Composites: Trends Shaping the Future

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