Comparative assessment of free surface energy of cement clinker and carbonate rocks and the efficiency of their wetting with aqueous solutions of plasticizing additives

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

The study of adsorption phenomena at the interface of solids and aqueous solutions of surfactants is the basis for identifying the mechanisms of plasticization, water reduction and air entrainment of mineral-water systems. Obviously, the free surface energy of the solid phase plays a special role in these phenomena. In this work, the components of this energy (acid-base and dispersion) for various mineral materials (cement clinker and limestones) were determined by the wetting angle method, and the effect of aqueous solutions of plasticizing additives on this indicator was estimated. It was shown that in materials with a relatively high SiO2 content, the acid component γs+ significantly prevails, while in materials with a low proportion of SiO2 and an increased content of CaO+MgO, the basic component γs of the surface energy predominantly manifests itself. This allows us to estimate the efficiency of aqueous solutions of cement concrete plasticizers, which are strong anion-active substances that are intensively adsorbed on the surface of materials with a pronounced basic component. The wetting angle of cement clinker and limestones with aqueous solutions of industrial plasticizers of different nature was studied: “Polyplast Ligno” based on sodium lignosulfonates, polynaphthalene methylsulfonate “SP-1” and “PC-1701” – a modified polycarboxylate ether. It was found that the most effective of them was the superplasticizer “PC-1701”, which even at an insignificant concentration (0.1%) reduces the contact angle of wetting on the surface of medium-strength limestone by 29.3%.

Толық мәтін

Рұқсат жабық

Авторлар туралы

A. Belyakov

Kazan State University of Architecture and Civil Engineering

Хат алмасуға жауапты Автор.
Email: belyakoffandrrey@mail.ru

Engineer, Postgraduate Student

Ресей, 1, Zelenaya Street, Kazan, 420043

O. Khokhryakov

Kazan State University of Architecture and Civil Engineering

Email: olvik@list.ru

Doctor of Sciences (Engineering)

Ресей, 1, Zelenaya Street, Kazan, 420043

K. Nesterova

Kazan State University of Architecture and Civil Engineering

Email: nesterova4301@mail.ru

Master’s Student

Ресей, 1, Zelenaya Street, Kazan, 420043

I. Larionov

Kazan National Research Technical University named after A.N. Tupolev – KAI

Email: larionov_igor1999@mail.ru

Engineer, Postgraduate Student

Ресей, 10, K. Marxa Street, 420111, Kazan

Әдебиет тізімі

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Қосымша файлдар

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Әрекет
1. JATS XML
2. Fig. 1. Wettability of a solid surface

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3. Fig. 2. Appearance of the Kruss FM40Mk2 Easy Drop goniometer and a “sessile drop” on the surface

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4. Fig. 3. Photographs of the surface of mineral material samples with optical magnification of 500×: а – cement clinker (Volsk); b – cement clinker (Magnitogorsk); c – limestone of the Minyar quarry; d – limestone of the Mikhailovsky quarry; e – limestone of the Chodrayal mine

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