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A platform for research: civil engineering, architecture and urbanism
Physico-Chemical Investigations of Water Suspensions Microfillers
https://orcid.org/http://orcid.org/0000-0003-1011-3861
https://orcid.org/http://orcid.org/0000-0002-7444-8188
At present, microfillers are widely used in heavy concretes. Mineral composition and dispersity of microfillers differ. There is no single method for assessing the effectiveness of microfillers. The views of different researchers on the need to use these materials are different. There are many contradictions that need clarification. In the technology of transport concretes, carboxylate based superplasticizers are used, as well as melamine formaldehyde and naphthalene formaldehyde compounds. Firms that produce such superplasticizers indicate in the annotations only the basis of the additive component, and not the whole of its composition. The use of superplasticizers in different cements differs greatly in the effect of the action. A traditional method for determining the effectiveness of microfillers and superplasticizers in concretes involves the preparation of samples and their subsequent testing at various times of hardening. It is advisable to use simpler physicochemical methods. These are methods for determining the pH and electromotive force (EMF) of aqueous suspensions of cements and microfillers. Instruments for measuring these indicators are simple, and the results can help predict the effectiveness of the use of additives in concrete. This article presents the results of studies of the pH and EMF of aqueous suspensions of cements and microfillers with and without superplasticizers. We used ground quartz and limestone microfillers, as well as carboxylate and naphthalene formaldehyde superplasticizers. Dependences of changes in these indicators over time are obtained. Based on the data obtained, it is possible to determine how the electrochemical properties of suspensions vary with time.
Physico-Chemical Investigations of Water Suspensions Microfillers
https://orcid.org/http://orcid.org/0000-0003-1011-3861
https://orcid.org/http://orcid.org/0000-0002-7444-8188
At present, microfillers are widely used in heavy concretes. Mineral composition and dispersity of microfillers differ. There is no single method for assessing the effectiveness of microfillers. The views of different researchers on the need to use these materials are different. There are many contradictions that need clarification. In the technology of transport concretes, carboxylate based superplasticizers are used, as well as melamine formaldehyde and naphthalene formaldehyde compounds. Firms that produce such superplasticizers indicate in the annotations only the basis of the additive component, and not the whole of its composition. The use of superplasticizers in different cements differs greatly in the effect of the action. A traditional method for determining the effectiveness of microfillers and superplasticizers in concretes involves the preparation of samples and their subsequent testing at various times of hardening. It is advisable to use simpler physicochemical methods. These are methods for determining the pH and electromotive force (EMF) of aqueous suspensions of cements and microfillers. Instruments for measuring these indicators are simple, and the results can help predict the effectiveness of the use of additives in concrete. This article presents the results of studies of the pH and EMF of aqueous suspensions of cements and microfillers with and without superplasticizers. We used ground quartz and limestone microfillers, as well as carboxylate and naphthalene formaldehyde superplasticizers. Dependences of changes in these indicators over time are obtained. Based on the data obtained, it is possible to determine how the electrochemical properties of suspensions vary with time.
Physico-Chemical Investigations of Water Suspensions Microfillers
https://orcid.org/http://orcid.org/0000-0003-1011-3861
https://orcid.org/http://orcid.org/0000-0002-7444-8188
At present, microfillers are widely used in heavy concretes. Mineral composition and dispersity of microfillers differ. There is no single method for assessing the effectiveness of microfillers. The views of different researchers on the need to use these materials are different. There are many contradictions that need clarification. In the technology of transport concretes, carboxylate based superplasticizers are used, as well as melamine formaldehyde and naphthalene formaldehyde compounds. Firms that produce such superplasticizers indicate in the annotations only the basis of the additive component, and not the whole of its composition. The use of superplasticizers in different cements differs greatly in the effect of the action. A traditional method for determining the effectiveness of microfillers and superplasticizers in concretes involves the preparation of samples and their subsequent testing at various times of hardening. It is advisable to use simpler physicochemical methods. These are methods for determining the pH and electromotive force (EMF) of aqueous suspensions of cements and microfillers. Instruments for measuring these indicators are simple, and the results can help predict the effectiveness of the use of additives in concrete. This article presents the results of studies of the pH and EMF of aqueous suspensions of cements and microfillers with and without superplasticizers. We used ground quartz and limestone microfillers, as well as carboxylate and naphthalene formaldehyde superplasticizers. Dependences of changes in these indicators over time are obtained. Based on the data obtained, it is possible to determine how the electrochemical properties of suspensions vary with time.
Physico-Chemical Investigations of Water Suspensions Microfillers
Lecture Notes in Civil Engineering
Blikharskyy, Zinoviy (editor) / Tolmachov, Serhij (author) / Belichenko, Olena (author)
International Scientific Conference EcoComfort and Current Issues of Civil Engineering ; 2020 ; Lviv, Ukraine
2020-08-17
8 pages
Article/Chapter (Book)
Electronic Resource
English
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