Control of porosity on durability of limestone at the great sphinx, Egypt

Punuru, Adinarayana R.; Chowdhury, Ahad N.; Kulshreshtha, Niraj P.; Gauri, K. Lal

doi:10.1007/bf01706414

Cited by 38 publications

(14 citation statements)

References 7 publications

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“…The disappearance of mesopores accompanied by the opening of the macropores observed in the present work is in accord with reports by Honeyborne and Harris (16), Kaneuji (20), Kaneuji et al (21), and Punuru et al (22), who proposed that the presence of a large volume of narrow pores (<0.5 µm) is detrimental due to the strong suction which fills all pores with water (capillary phenomenon). Limestone with abundant large pores (0.5-5 µm) appeared to be generally more durable, as it exerts weaker suction.…”

Section: Resultssupporting

confidence: 95%

Dissolution Effects on Specific Surface Area, Particle Size, and Porosity of Pentelic Marble

Orkoula

Koutsoukos

2001

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 95%

Dissolution Effects on Specific Surface Area, Particle Size, and Porosity of Pentelic Marble

Orkoula

Koutsoukos

2001

Journal of Colloid and Interface Science

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“…It has been established numerous times that the hydric properties of stones as well as their tensile strength are the critical parameters governing the durability of stones to salt decay, and these parameters are widely used to estimate this durability (Punuru et al 1990;Benavente et al 2004b;Angeli et al 2007). This study suggests the importance of pre-existent cracks on the durability of stone regarding salt decay.…”

Section: Resultsmentioning

confidence: 99%

Modification of the porous network by salt crystallization in experimentally weathered sedimentary stones

Angeli

Benavente

Bigas³

et al. 2007

Mater Struct

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The aim of this study is to understand how the porous network of a stone is modified by the crystallization of sodium sulphate. Samples of five different stones have been experimentally weathered and evaluated thanks to mercury porosimetry in three different states: fresh, weathered by salt, and weathered cleaned from the salts. Optical and electronic microscopy observations have also been led to complete these measurements. The results show that porosity and the general aspect of the porous network remain quite similar after weathering. Nevertheless, crystals tend to grow on all the grains regardless of the size of the related voids (pores or cracks), and these crystallizations seem to be harmful for the stone: a lot of voids of different entry sizes (from 10nm to 20µm) have been affected during the accelerated ageing tests. This study confirms that generally stones with a high amount of small pores (up to several µm) are the most susceptible to suffer from salt damage. Nevertheless, the influence of a few other features (high porosity, pore shape, pre-existent intragranular cracks) on the long-term behaviour of the stones suffering from salt decay is discussed.

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“…The usefulness of these tests is shown by the numerous studies which have used this technique in the characterisation and evaluation of the alteration of stone material, such as [19,17,1,18,2,5,6]. …”

Section: Desorption Testsmentioning

confidence: 99%