Thermal highly porous insulation materials made of mineral raw materials

Mestnikov, A. E.

doi:10.1088/1757-899x/71/1/012014

Cited by 2 publications

(2 citation statements)

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“…The fracture toughness of the hardened cement paste materials was determined by means of a 3-point bend system (5940 Series system; Instron, Norwood, MA, USA), following the procedure described previously [56]. For the measurements, we used the standardized spherical head (diameter of 18 mm) and defined cement paste samples (50 mm (length) × 25 mm (width) × 25 mm (height)).…”

Section: Methodsmentioning

confidence: 99%

Transformation of Construction Cement to a Self-Healing Hybrid Binder

Müller

Tolba

Wang

et al. 2019

IJMS

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A new biomimetic strategy to im prove the self-healing properties of Portland cement is presented that is based on the application of the biogenic inorganic polymer polyphosphate (polyP), which is used as a cement admixture. The data show that synthetic linear polyp, with an average chain length of 40, as well as natural long-chain polyP isolated from soil bacteria, has the ability to support self-healing of this construction material. Furthermore, polyP, used as a water-soluble Na-salt, is subject to Na+/Ca2+ exchange by the Ca2+ from the cement, resulting in the formation of a water-rich coacervate when added to the cement surface, especially to the surface of bacteria-containing cement/concrete samples. The addition of polyP in low concentrations (<1% on weight basis for the solids) not only accelerated the hardening of cement/concrete but also the healing of microcracks present in the material. The results suggest that long-chain polyP is a promising additive that increases the self-healing capacity of cement by mimicking a bacteria-mediated natural mechanism.

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Section: Methodsmentioning

confidence: 99%

Transformation of Construction Cement to a Self-Healing Hybrid Binder

Müller

Tolba

Wang

et al. 2019

IJMS

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“…In later studies [21], this method of obtaining foam-gypsum materials was changed. The main components of the mixture were: gypsum binder, surfactant in the form of sodium salt of secondary alkyl sulfates, thickener (8-12% polyvinyl alcohol solution and / or polyvinyl acetate dispersion), polymer binder (amino formaldehyde resin), hardener polymer binder (ammonium chloride), curing accelerator of gypsum (potassium sulphate or sodium sulphate) and water.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Polyvinyl Alcohol on the System of Cement-Free Binding Alumino-Silicate Composition

Строкова

Sivalneva

Kobzev

2020

SSP

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Cement-free binding materials are a promising type of materials. The relevance and the possibility of increased efficiency of these materials are reasoned by environmental and technical-economic conditions of the current state of building industry. As a result of research, the following effect was established: polyvinyl alcohol on cement-free highly concentrated aluminosilicate binder suspension, obtained from granio-diorite screenings, increases the stability of structure-forming processes, due to the formation of associates and binding particles in the form of bulk network structures, that create a frame. Polyvinyl alcohol plays the role of a non-ionic regulator of the dimension and stability of these emerging structures, that determine and control the properties of the material, as a whole.

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Thermal highly porous insulation materials made of mineral raw materials

Cited by 2 publications

References 0 publications

Transformation of Construction Cement to a Self-Healing Hybrid Binder

Transformation of Construction Cement to a Self-Healing Hybrid Binder

The Effect of Polyvinyl Alcohol on the System of Cement-Free Binding Alumino-Silicate Composition

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