Pore structure and mechanical properties of cement–lime mortars

Arandigoyen, M.; Álvarez, J.I.

doi:10.1016/j.cemconres.2007.02.023

Cited by 167 publications

(94 citation statements)

References 23 publications

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“…The smaller total porosity and reduced threshold pore size and consequently lower pore connectivity are found in HCPs due to the inclusion of PCE, which results from the dispersing effect of PCE in FCPs and the heightened cement hydration degree. The results are consistent with previous reports of others (Arandigoyen and Alvarez 2007;Khatib and Mangat 1999;Sakai et al 2006). The pore size distribution and the pore volume of HCPs cured for 28 days are slightly affected by the addition of PCE, while with the growth in P/C, obvious decline in the entrapped mercury volume is presented due to the better dispersion of cement grains in FCPs.…”

Section: Pore Structure Of Hcps With W/c Of 029supporting

confidence: 82%

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Zhang

Kong

2014

ACT

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The influences of polycarboxylate (PCE) superplasticizer on pore structure of hardened cement pastes (HCPs) and impermeability of hardened mortars were investigated. Cement pastes and mortars with different water to cement ratios (W/Cs) and varied superplasticizer dosages were prepared and cured for 7 days and 28 days respectively. Mercury intrusion porosimetry and alternating current impedance (ACI) were employed to characterize the pore structure of HCPs and the impermeability of hardened mortars. Results show that PCE significantly affects the pore structure of HCPs due to its impacts on the dispersion of cement grains in fresh cement pastes. The effects of superplasticizer on the pore structure are associated with W/C and curing age of cement pastes. At W/C of 0.29, increasing superplasticizer dosage results in obvious declines in total pore volume at early ages and reduces pore connectivity. By contrast, increases in total pore volume and higher pore connectivity are found when PCE is incorporated in the paste at W/C of 0.4. ACI reveals that the inclusion of PCE brings about a denser structure and enhanced impermeability of hardened mortars. It is believed that the enhanced impermeability is related to the reduced interfacial heterogeneity and the compacted interfacial zone when PCE is added.

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Section: Pore Structure Of Hcps With W/c Of 029supporting

confidence: 82%

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Zhang

Kong

2014

ACT

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“…Lange [10] explored several image analysis techniques that provide insight into the nature of pore structure as observed in backscattered electron images of polished sections. In Arandigoyen et al [11], microstructure of blended mortars is studied taking into account porosity, pore size distribution and surface fractal dimension, meanwhile Diamond et al [12] have shown that pore systems of concrete may present fractal characteristics.…”

Section: Introductionmentioning

confidence: 99%

Intermingled fractal units model and electrical equivalence fractal approach for prediction of thermal conductivity of porous materials

Pia

Sanna

2013

Applied Thermal Engineering

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“…Asimismo se han documentado algunos elementos que determinan el estado de conservación de los morteros, en tanto que dicho estado de conservación queda condicionado por la calidad de las manufacturas, como la presencia de poro o de nódulos, que condiciona sus características físicas y mecánicas (Arandigoyen, y Álvarez, 2007), o el tamaño y dosificaciones de los áridos, que pueden determinar la respuesta de los morteros ante las tensiones (Hormes et al, 2016: 191).…”

Section: Resultsunclassified

Caracterización Macroscópica De Morteros Romanos De Tipo Industrial En Villamanta (Madrid). Primeros Datos

García

Martín

Medel

et al. 2017

ESJ

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The objective of this article is to show the results obtained from the physical and macroscopic characterization of the mortars sampled by Isabel Marqués and Alejandro Bermúdez, archaeological directors of the intervention carried out in El Tejar settlement, in the municipality of Villamanta (Madrid, Spain). The results of this work have determined a relevant typological classification among the samples, highlighting the presence of siliceous aggregates, ceramics in some mortars, a very varied grading and a distribution of the components that have conditioned the conservation. Of the four samples taken -VMT1 to VMT4-one of them has an aqueous pigmentation, belonging to an inside plaster, while the others correspond to lime mortars with aggregates from hydraulic surfaces. The archaeological investigation of the deposit of Villamanta is complemented by an implementation check of lime mortars, being one of the most important Roman context of Madrid. This research add a sequence of new results around the Roman mortars and implements a methodology in the study of the historical mortars.

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Pore structure and mechanical properties of cement–lime mortars

Abstract: Studies focusing on materials used in Cultural Heritage conservation projects are becoming increasingly important. In this paper, pore structure and mechanical

Cited by 167 publications

References 23 publications

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Intermingled fractal units model and electrical equivalence fractal approach for prediction of thermal conductivity of porous materials

Caracterización Macroscópica De Morteros Romanos De Tipo Industrial En Villamanta (Madrid). Primeros Datos

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