An effective way to prevent shrinkage deformation in concrete structures is the use of expanding additives. In this regard, the theoretical substantiation and the results of the authors’ experimental studies of the use of such additives are presented in the paper. The structure and properties of the contact zone between cement stone and aggregate in concretes with expansive additives have been studied in detail. The influence of expanding additives on the state and properties of the contact zone of cement-sand matrix with various types of aggregates has been studied. Several different types of aggregates, differing in their degree of density, have been considered. The analysis is performed and it is shown that the structure of the contact zone is very heterogeneous. However, the introduction of an expanding additive of the sulfoalluminate type contributes to a significant increase (several times) in the strength and homogeneity of the contact zone both at the boundary with porous and at the boundary with dense aggregate. It is noted that the application of the expanding additive in concretes on the combined aggregate provides the maximum effect.


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    Title :

    Investigation of the Contact Zone Between Cement Stone and Various Types of Aggregates in Concrete


    Additional title:

    Lect. Notes in Networks, Syst.


    Contributors:

    Conference:

    International School on Neural Networks, Initiated by IIASS and EMFCSC ; 2022 ; St.Petersburg, Russia February 08, 2022 - February 10, 2022



    Publication date :

    2022-11-16


    Size :

    8 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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