Constructional geomaterials: versatile earth resources in the service of humankind—introduction to the thematic set of papers on: challenges to supply and quality of geomaterials used in construction

Přikryl, Richard

doi:10.1007/s10064-016-0985-0

Cited by 20 publications

(9 citation statements)

References 53 publications

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“…Tangible cultural heritage such as ruins or stone buildings needs special attention in terms of preservation and documentation (Jokilehto 1999). It has been noted previously that prior to any intervention and conservation, a detailed survey is needed to record architectural elements and materials used at the site (Török and Přikryl 2010;Přikryl 2013Přikryl , 2017. Additional studies are needed to understand the behaviour of materials and their compatibility with any replacement stone, render or other compounds that are planned to be used (Beck and Al-Mukhtar 2008;Modestou et al 2016;De Kock et al 2017).…”

Section: Introductionmentioning

confidence: 99%

In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in Hungary

Theodoridou

Török

2019

Prog Earth Planet Sci

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This paper demonstrates the application of in situ diagnostic tools to document stone heritage sites prior to conservation interventions using a Medieval ruin of Central Europe (Székesfehérvár, Hungary). The applied methods included lithological mapping and characterisation and mapping of decay forms as well as in situ measurements of physical parameters such as Schmidt hammer rebound, moisture content and micro-drilling resistance. The combination of these methods allowed the condition assessment of different lithotypes and demonstrated the role of micro-fabric, mineralogical composition and climatic conditions in stone durability. Differences were found in the properties and in the weathering forms of fine-grained and medium-grained porous oolitic limestone and travertine. The black crust observed in porous limestone is less prone to detachment on medium-grained oolitic limestone ashlars, while scaling was observed on fine-grained oolitic limestone blocks. The micro-drilling resistance of exposed porous limestone showed higher drilling resistance at the crust zone (upper 1-2 mm) than below, marking the upper cemented zone, while the drilling resistance of porous limestone under shelter showed an opposite trend. The shelly limestone, the sandy calcarenite and red compact limestone also showed an increase in drilling resistance at the topmost app. 2 mm zone. The applied in situ, non-invasive and micro-destructive techniques helped in the identification of endangered zones at Székesfehérvár, thus, they can provide key information on condition assessment of stones at heritage sites, where sampling is limited and preventive conservation is important.

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Section: Introductionmentioning

confidence: 99%

In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in Hungary

Theodoridou

Török

2019

Prog Earth Planet Sci

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“…Natural stones are essential building materials, as they are used as dimension stones and aggregates (Přikryl 2017). Their applicability is controlled by their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Czinder

Török

2020

Bull Eng Geol Environ

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Aggregates are necessary materials for the construction industry. Owing to their favourable properties, andesites are frequently used rock materials; hence, the investigation of their mechanical and aggregate properties has great significance. This paper introduces the analyses of 13 Hungarian andesite lithotypes. The samples were collected from six andesite quarries in Hungary. Cylindrical specimens and aggregate samples with 10.0/14.0-mm-sized grains were made from rock blocks. The specimens were tested in dry, water-saturated and freeze–thaw subjected conditions. Bulk density, uniaxial compressive strength, modulus of elasticity, indirect tensile strength and water absorption were measured. The abrasion resistance was tested by micro-Deval tests. The flakiness indexes of the samples were also measured. The data set of the laboratory test results provided input for further, one- and two-variable statistical analyses. According to the test results, there is no significant difference between the strength parameters measured in water-saturated and in freeze–thaw subjected conditions. The correlation and regression analyses revealed relationships between some rock mechanical parameters, as well as between micro-Deval coefficient and uniaxial compressive strength.

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“…The production of geomaterials, on the other side, has severe environmental and social impacts. Besides technical properties, some typical attributes can be given to constructional geomaterials, such as availability (existence in the Earth's crust and the technological possibility to extract it), sustainability (impacts of their exploitation, especially on ecosystems), and functionality (accessibility, workability, and serviceability) [3].…”

Section: Introductionmentioning

confidence: 99%

Potential of Natural and Recycled Concrete Aggregate Mixtures for Use in Pavement Structures

Đokić¹,

Radević

Zakić

et al. 2020

Minerals

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This study investigates the feasibility of using recycled concrete aggregate (RCA) as a partial substitution of natural aggregate in pavement engineering. Despite RCA’s good properties, such as polishing value and freeze-thaw resistance, its use is limited by low resistance to fragmentation and high-water absorption. This paper parent the experimental results of mineralogical-petrographic and physical-mechanical properties of RCA, natural stone (dolerite) and their combination (RCA content—15%, 30%, 45%, and 60%). The tested granular mixtures showed good resistance to fragmentation and wear (LA 22–27%, MDE 14–15%), as well as satisfactory Polished Stone Value of 55–57, which means they can be used in different layers of pavement structures. According to the obtained testing results, the application of RCA is possible in different flexible and rigid pavement layers and for various traffic loads.

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Constructional geomaterials: versatile earth resources in the service of humankind—introduction to the thematic set of papers on: challenges to supply and quality of geomaterials used in construction

Cited by 20 publications

References 53 publications

In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in Hungary

In situ investigation of stone heritage sites for conservation purposes: a case study of the Székesfehérvár Ruin Garden in Hungary

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Potential of Natural and Recycled Concrete Aggregate Mixtures for Use in Pavement Structures

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