Validation of alternative methodologies by using capillarity in the determination of porosity parameters of cement-lime mortars

被引：0
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作者：
Markssuel T. Marvila
Afonso R. G. de Azevedo
Ruan L. S. Ferreira
Carlos Maurício F. Vieira
Jorge de Brito
Adeyemi Adesina
机构：
[1] State University of Northern Rio de Janeiro,Advanced Materials Laboratory, LAMAV
[2] UENF,Civil Engineering Laboratory, LECIV
[3] State University of Northern Rio de Janeiro,Science and Technology of Pernambuco, Civil Construction Department
[4] UENF,CERIS, Instituto Superior Técnico
[5] Federal Institute of Education,undefined
[6] Universidade de Lisboa,undefined
[7] Department of Civil and Environmental Engineering,undefined
来源：
Materials and Structures | 2022年 / 55卷
关键词：
Capillarity; Darcy’s law; Porosity; Cement; Water absorption; Percolation;
D O I：
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学科分类号：
摘要：
The capillary mechanisms in mortars were investigated in this study by using different cement-lime mortar compositions commonly used in coatings and repair mortars. Two types of natural sand (maximum diameter of 1.2 and 2.4 mm) were used in water absorption by capillarity, water absorption by immersion and boiling, and mercury intrusion porosimetry tests. The results obtained were validated by Darcy's Law for water flow in a porous medium. Findings from this study showed that mixed-binder mortars of 1:1:6 and 1:2:9 (cement: lime: sand), and cement mortars 1:3 (cement: sand) exhibited a direct relationship with the results obtained by Darcy's law. Hence, such a method can be used in determining the percentile of capillary pores in mortars. Results from this study also showed that lime mortars with a composition of 1:3 (lime: sand) do not comply with Darcy's law due to the intrinsic properties of the binder, such as hygroscopicity.
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