Drilling Resistance as an Indicator for Effectiveness of Stone Consolidation

2009 ◽  
pp. 77-77-13 ◽  
Author(s):  
S Lotzmann ◽  
HR Sasse
Keyword(s):  
Stone Consolidation ◽  
Drilling Resistance

Stone consolidation with SiO2 nanoparticles: Effects on a high porosity limestone

2019 ◽  
Vol 219 ◽  
pp. 154-163 ◽  
Author(s):  
Emilia Vasanelli ◽  
Angela Calia ◽  
Maurizio Masieri ◽  
Giovanni Baldi
Keyword(s):  
Sio2 Nanoparticles ◽  
High Porosity ◽  
Stone Consolidation

scholarly journals Assessment of Wooden Foundation Piles after 125 Years of Service

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 143
Author(s):  
Miha Humar ◽  
Angela Balzano ◽  
Davor Kržišnik ◽  
Boštjan Lesar
Keyword(s):  
Bronze Age ◽  
Thick Layer ◽  
Microscopic Analysis ◽  
Soft Rot ◽  
Structural Condition ◽  
Significant Deterioration ◽  
Density Analysis ◽  
Screw Withdrawal ◽  
Drilling Resistance ◽  
Gain Access

Buildings on piles have been constructed in Ljubljana since the Bronze Age. The piles were made of different types of wood. In the present study, piles that were erected about 125 years ago were investigated. Investors tend to renovate a building; therefore, the piles were analysed to assess the structural condition of the building. The building showed no signs of damage. To gain access to the piles, a 2 m thick layer of soil was removed. On-site, the following analyses were carried out: drilling resistance with a resistograph and a screw withdrawal test. Part of the piles was isolated and light microscopy, scanning electron microscopy, infrared spectroscopy, dynamic vapour sorption, density analysis, and chemical analysis were performed. Microscopic analysis revealed that the piles were made from the wood of Scots pine (Pinus sylvestris). The results indicate that the wood was severely degraded, mainly by soft-rot fungi and bacteria, resulting in a significant deterioration of its mechanical properties.

Prediction of Compressive Strength for Heterogeneous Mortars from Drilling Resistance Data

2018 ◽  
Vol 14 (3) ◽  
pp. 415-432 ◽  
Author(s):  
Rita Nogueira ◽  
A. P. Ferreira Pinto ◽  
Augusto Gomes ◽  
J. Alexandre Bogas
Keyword(s):  
Compressive Strength ◽  
Drilling Resistance ◽  
Resistance Data

scholarly journals Effectiveness and Compatibility of a Novel Sustainable Method for Stone Consolidation Based on Di-Ammonium Phosphate and Calcium-Based Nanomaterials

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3025 ◽  
Author(s):  
Cecilia Pesce ◽  
Ligia M. Moretto ◽  
Emilio F. Orsega ◽  
Giovanni L. Pesce ◽  
Marco Corradi ◽  
...  
Keyword(s):  
Ammonium Phosphate ◽  
Pulse Velocity ◽  
X Ray ◽  
Artistic Value ◽  
Physical Chemical ◽  
Stone Consolidation ◽  
Colour Measurements ◽  
Combined Use ◽  
Water Absorption Test ◽  
Ultrasound Pulse

External surfaces of stones used in historic buildings often carry high artistic value and need to be preserved from the damages of time, especially from the detrimental effects of the weathering. This study aimed to test the effectiveness and compatibility of some new environmentally-friendly materials for stone consolidation, as the use thereof has been so far poorly investigated. The treatments were based on combinations of an aqueous solution of di-ammonium phosphate (DAP) and two calcium-based nanomaterials, namely a commercial nanosuspension of Ca(OH)2 and a novel nanosuspension of calcite. The treatments were applied to samples of two porous stones: a limestone and a sandstone. The effectiveness of the treatments was assessed using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, ultrasound pulse velocity test, colour measurements, and capillary water absorption test. The results suggest that the combined use of DAP and Ca-based nanosuspensions can be advantageous over other commonly used consolidants in terms of retreatability and physical-chemical compatibility with the stone. Some limitations are also highlighted, such as the uneven distribution and low penetration of the consolidants.

Bohrwiderstandsmessungen, eine neue und standardisierbare Methode zur Bestimmung der Kohäsion von Naturstein: Entwicklung eines Prototypes und dessen Erprobung / Drilling force measurement system, a new standardisa i methodology to determine the stone cohesion: Prototype design and validation

2000 ◽  
Vol 6 (2) ◽  
pp. 115-132 ◽  
Author(s):  
P. Tiano ◽  
C. Filareto ◽  
S. Ponticelli ◽  
M. Ferrari ◽  
E. Valentini
Keyword(s):  
Force Measurement ◽  
Direct Determination ◽  
Drilling Force ◽  
System A ◽  
Stone Materials ◽  
Force Measurement System ◽  
Drilling Resistance ◽  
Non Destructive

Abstract In the field of conservation of monumental buildings actually a standard methodology is lacking, with which it is possible to determine with the same sensitivity and reliability the "stone hardness" both at the superficial surface and at larger depths (few centimetres), both in laboratory and in situ. The use of the drilling resistance to determine the stone hardness is a very recent application and few working outdoor devices exist. The objective of this work is to validate a new and improved system to assess the drilling resistance of stones. The DFMS is portable and a quasi non-destructive device for direct determination of the "cohesion" of stone materials through the determination of their drilling resistance. The best operational features of the prototype have been established together with the assessment of the sensitivity and reliability of the system.

scholarly journals Estimation of In-situ concrete strength using drilling resistance

2019 ◽  
Vol 289 ◽  
pp. 06001
Author(s):  
Serkan Karatosun ◽  
Muhammet Asan ◽  
Oguz Gunes
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Condition Assessment ◽  
Assessment Practice ◽  
Destructive Testing ◽  
Seismic Safety ◽  
Concrete Mixtures ◽  
Priority Task ◽  
Compressive Strength Of Concrete ◽  
Drilling Resistance

Rapid and reliable condition assessment of reinforced concrete structures in high seismicity regions is a priority task in estimating their seismic safety. Non-destructive testing (NDT) methods may contribute to the condition assessment practice by providing fast and reliable strength estimation while causing minimal or no damage to the structure. Drilling resistance is an NDT method that has been used for mechanical characterization of natural stone and wood by measuring the force response for constant penetration rate and rotational speed. This paper focuses on the relationship between drilling resistance and compressive strength of concrete, including when it is combined with other NDT methods. Concrete cube samples produced using 6 different concrete mixtures were tested. Correlation equations were then obtained using statistical analysis. The results reveal that it may be possible to reliably estimate the compressive strength of concrete using drilling resistance method.

Research of On-Site Screening and Non-Destructive Testing for Damaged Wooden Components of the Long Corridor in Temple of Heaven

2020 ◽  
Vol 980 ◽  
pp. 321-332
Author(s):  
Xin Li ◽  
Wei Qian ◽  
Rui Xu ◽  
Li Hong Chang ◽  
Max Schubert
Keyword(s):  
Stress Wave ◽  
Resistance Testing ◽  
Non Destructive Testing ◽  
Comparison Analysis ◽  
Testing Methods ◽  
Destructive Testing ◽  
Micro Drilling ◽  
As Stress ◽  
Drilling Resistance ◽  
Non Destructive

Take the Long Corridor in Temple of Heaven as an example, some screening and testing process for its wooden components which have damaged was recommended. By pre-knocking survey, the wooden components which probably have damaged were screened out and as the important focus. Then, some non-destructive testing methods such as stress-wave testing and micro-drilling resistance testing were utilized. By the comparison, analysis and interaction correction for the testing images, the internal damaged situation of wooden components were obtained. Three typical types of wooden components were selected in this study, and some specific and suitable non-destructive testing methods which adapt to their position characteristic were discussed. Thus, it can give some useful suggestions and data supporting for the later repairing and management works.

Drilling resistance: overview and outlook

2007 ◽  
Vol 158 (3) ◽  
pp. 665-679 ◽  
Author(s):  
Marisa Pamplona ◽  
Mathias Kocher ◽  
Rolf Snethlage ◽  
Luís Aires Barros
Keyword(s):  
Drilling Resistance
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