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Analysis of the degradation process of sand-lime plasters under the impact of crystallization pressure

Ślusarek Jan, Słomka-Słupik Barbara, Bochen Jerzy

Architecture Civil Engineering Environment

2023

Vol. 16, no. 2

137--149

A masonry basement wall was heavily dampened due to the lack of waterproofing in the ground contact area. Internal sand-lime wall plaster samples were subjected to chemical, physical and strength tests. The main phases of the damaged plaster were quartz and calcite. A measuring method of the tensile strength of plasters was proposed. A polar-symmetric deformation problem of a thick-walled spherical tank, allowing for the estimation of circumferential stresses in the spherical model was used for the analysis. It was found that the same values of porosity correspond to identical values of circumferential stresses, regardless of the values of the radii of the analyzed model. Thus the purpose of the presented research was to demonstrate that the mentioned dependence applied in the adopted model may be useful for the analysis of problems involving the resistance of internal plaster structure to the expansion caused by crystallization pressure.

Analiza uszkodzeń w warstwie stykowej kruszywo-zaczyn kompozytów betonowych

Golewski G. L.

Przegląd Budowlany

2008

R. 79, nr 3

35-41

Omowiono charakter powstawania i propagacji uszkodzeń w obszarze warstwy stykowej kruszywo-zaczyn. Scharakteryzowano strukturę modelu sferycznego w obszarze styku kruszywa z matrycą. Przedstawiono główne czynniki decydujące o budowie warstwy stykowej i omówiono sposoby pomiaru jej parametrów.

The paper describes the manner in which damage arises and propagates within the paste-aggregate contact layer. It presents the structure of the spherical model in the area where the aggregate is in contact with the matrix. The main factors affecting the structure of the contact layer are presented, and methods of measuring its parameters are discussed.