Porous Structure of Road Concrete

Пшембаев, М. К.; Гиринский, В. В.; Ковалев, Ярослав Никитич; Яглов, В. Н.; Будниченко, С. С.

doi:10.21122/2227-1031-2016-15-4-298-307

Cited by 4 publications

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“…При этом образующаяся аморфная фаза высвобождает воду уже при температурах ниже 150 °С. Эта фаза обладает мелкими канальными порами, порядок размера которых составляет около 10 -8 м [19]. Также для создания непрерывной канальной пористости в огнеупорных бетонах широко применяются полимерные выгорающие волокна, при этом диаметр образующихся пор имеет порядок 10 -6 м.…”

Section: химические аспекты гидратации высокоглиноземистых цементовunclassified

The modeling of the moisture movement inside the refractory concrete when drying by means of percolation structures

Zabolotskii¹,

Aksel'rod²,

Marchenko³

2018

Nov. ogneup.

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The refractory concrete dehydration process was investigated by applying of the statistical percolation model of the concrete structure. The various moisture evacuation mechanisms were regarded at various steps of this process, the diﬀusion in the solid phase and the movement through the open pores including. The temperatures were defned at which the moisture removing mechanisms were working in the concretes. It was shown how the model could be applied to the calculation of the moisture removing out of the real lining or out of the concrete product. The concrete percolation model was used to analyze the mass loss plots for the dense concretes and to evaluate the coefcients for the water diﬀusion inside the concretes in various conditions.Ill.5. Ref. 31. Tab. 3.

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Section: химические аспекты гидратации высокоглиноземистых цементовunclassified

The modeling of the moisture movement inside the refractory concrete when drying by means of percolation structures

Zabolotskii¹,

Aksel'rod²,

Marchenko³

2018

Nov. ogneup.

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“…Среди перечисленных факторов особое место занимает сезонное изменение температурыгодичное и суточное. Температурный режим во многом зависит от скорости и величины изменения температуры воздуха, а также от солнечной радиации [1].…”

Section: Introductionunclassified

Analysis of Stress State in Upper Layer of Road Concrete Pavement With Temperature Action

Пшембаев¹,

Ковалев²,

Shevchuk³

2017

Nauka teh.

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While being operated auto-road pavements are subjected to intensive mechanical impacts, ultraviolet ray irradiation, freeze-thaw temperatures, freezing and thawing, drying and moistening. Due to these actions various types of pavement distresses appear on the road pavement. The most significant and dangerous type of distresses is micro-cracks on the road surface. One of the main reasons for their formation is an action of weather and climatic factors that initiate large changes in temperature of coating surface and occurrence of large temperature gradients in the upper layer. In this context while designing and operating auto-roads it is rather essential to investigate a stress state in road surface which is caused by temperature action. Purpose of the described investigations is to determine permissible temperature gradients for cement-concrete pavements that exclude formation of micro-cracks on their surface and thickness of damaged surface layer. Calculations of road pavement have been carried out at various laws for temperature distribution in its depth. A finite difference method realized in PARUS software has been used for studying a stress state of cement-concrete auto-roads. Regularities for distribution of stresses in cement-concrete pavement of auto-roads have been obtained at various surface temperatures. Permissible temperature gradients in the upper pavement layer have been determined and thickness of the layer where micro-cracks are formed has been assessed in the paper. Strength criterion based on the process of micro-crack formation and development in the concrete has been used for calculations. Risk of micro-crack formation on the auto-road pavement depends on material strength, conditions of plate fixing and temperature gradients.

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Modeling Moisture Movement within Refractory Concrete During Drying by Means of Percolation Structures

Zabolotskii

Aksel'rod²,

Marchenko

2018

Refract Ind Ceram

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Porous Structure of Road Concrete

Cited by 4 publications

References 0 publications

The modeling of the moisture movement inside the refractory concrete when drying by means of percolation structures

The modeling of the moisture movement inside the refractory concrete when drying by means of percolation structures

Analysis of Stress State in Upper Layer of Road Concrete Pavement With Temperature Action

Modeling Moisture Movement within Refractory Concrete During Drying by Means of Percolation Structures

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