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

2022 ◽  
Vol 55 (1) ◽  
Author(s):  
Markssuel T. Marvila ◽  
Afonso R. G. de Azevedo ◽  
Ruan L. S. Ferreira ◽  
Carlos Maurício F. Vieira ◽  
Jorge de Brito ◽  
...  
Keyword(s):  
Lime Mortars

Reactivity of Brick Powder in Lime Mortars

2014 ◽  
Vol 897 ◽  
pp. 135-138 ◽  
Author(s):  
Eva Navrátilová ◽  
Pavla Rovnaníková
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pozzolanic Activity ◽  
Strength Characteristics ◽  
Brick Powder ◽  
Lime Mortars ◽  
Hardened State

The article deals with the assessment of three brick powders. Their properties are evaluated on the basis of their pozzolanic activity, specific surface area and amorphous area. The brick powders were used in amounts of 20 and 40% as a substitute for binder in lime mortars. The influence of the powders on the properties of the modified plasters in a hardened state was evaluated via the determination of strength characteristics. It was found that not all brick powders are suitable for use in modified lime mortars.

Cretaceous aggregate and reservoir effect in dating of binding materials

2013 ◽  
Vol 40 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Danuta Michalska ◽  
Anna Pazdur ◽  
Justyna Czernik ◽  
Małgorzata Szczepaniak ◽  
Marta Żurakowska
Keyword(s):  
Raw Materials ◽  
Dead Sea ◽  
Building Construction ◽  
Radiocarbon Dates ◽  
Reservoir Effect ◽  
Limestone Aggregate ◽  
Burnt Lime ◽  
Lime Mortars ◽  
Different Origins

AbstractLime mortars may contain carbon from different origins. If the mortars are made of totally burnt lime, radiocarbon dating yields the true age of building construction. The presence of carbonaceous aggregates gives the so-called dead carbon effect, which may generate older ages. Another source of carbon is charcoal present in mortars. An attempt has been made to apply the radiocarbon method to mortars of archaeologically estimated age from the Dead Sea region. Petrographical analyses of these samples show the carbonaceous character of the binder and large amounts of limestone aggregate. Determination of the mineral composition of the mortars and comparison with the geology of the surrounding, allows the provenance of the raw materials to be identified. They probably represent the Cretaceous rocks of the Judea Group.Separate radiocarbon dates were made on bulk mortar samples, binder, charcoal fragments and separated fractions from mortars. In the case of binder-aggregate mixture the reservoir effect correction has been applied.

scholarly journals Effect of Specimens' Shape and Size on the Determination of Compressive Strength and Deformability of Cement-lime Mortars

2018 ◽  
Vol 20 (suppl 2) ◽  
pp. 819-825
Author(s):  
Gustavo Henrique Nalon ◽  
Roseli Oliveira Guedes Martins ◽  
Rita de Cássia Silva Sant'Ana Alvarenga ◽  
Gustavo Emilio Soares de Lima ◽  
Leonardo Gonçalves Pedroti ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Lime Mortars ◽  
Shape And Size

Chemical Analysis of Historic Lime Mortars: Role of Sample Preparation

2015 ◽  
Vol 1100 ◽  
pp. 17-20
Author(s):  
Radek Ševčík ◽  
Petr Šašek ◽  
Marta Pérez-Estébanez ◽  
Alberto Viani
Keyword(s):  
Chemical Analysis ◽  
Acid Digestion ◽  
Acid Attack ◽  
Digestion Method ◽  
Lime Mortar ◽  
Conservation Practice ◽  
Lime Mortars

The characterization of historic lime mortars is crucial for many cultural heritage conservation issues. In this work, the characterization of a historical lime mortar is described. Samples for chemical analysis were obtained after different milling times and using the RILEM acid digestion method on several replicates. Qualitative and quantitative determination of phases in the mortar and in the residues after acid attack and the potential presence of CaCO3 polymorphs, were accomplished with X-ray powder diffraction. Results suggest that representativeness of the sample and the homogenisation, although not always achievable in conservation practice, are strongly affecting results.

scholarly journals Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

2011 ◽  
Vol 45 (6) ◽  
pp. 841-849 ◽  
Author(s):  
Elif Uğurlu Sağın ◽  
Hasan Böke ◽  
Nadir Aras ◽  
Şerife Yalçın
Keyword(s):  
Sio2 Content ◽  
Lime Mortars

Pre-Restoration Investigation of Historical Stone Materials and Corrosion Damage of VEF Culture Palace in Riga, Latvia

2019 ◽  
Vol 800 ◽  
pp. 235-239
Author(s):  
Inta Kirilovica ◽  
Margarita Karpe ◽  
Inta Vitina ◽  
Viktorija Sucevana
Keyword(s):  
Corrosion Damage ◽  
Visual Observation ◽  
Chemical Analyses ◽  
Soluble Salts ◽  
Stone Materials ◽  
Physico Chemical ◽  
Complete Restoration ◽  
Lime Mortars ◽  
Wet Chemical

This study deals with the restoration of columns of the VEF Culture Palace. A complete restoration of the building was performed in 2016–2017 [1]. The methodology of physico-chemical investigation of the stone materials of two facade columns includes visual observation, granulometric analyses, classic wet chemical analyses, XRD and determination of soluble salts’ content. The data obtained indicate, that for rendering of columns dolomitic and calcitic lime mortars were used. An efflorescence of sulphates on the bricks’ surface is observed.

Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis

2006 ◽  
Vol 444 (2) ◽  
pp. 179-189 ◽  
Author(s):  
R.M.H. Lawrence ◽  
T.J. Mays ◽  
P. Walker ◽  
D. D’Ayala
Keyword(s):  
Thermogravimetric Analysis ◽  
Hydraulic Lime ◽  
Lime Mortars

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

Sign in / Sign up

Export Citation Format

Share Document