Resistance of External Thermal Insulation Composite Systems with Rendering (ETICS) to Hail

This paper analyzes the resistance to hail of external thermal insulation composite systems (ETICS), i.e., external thermal insulation of foamed polystyrene with the same finishing coat and various reinforcing mesh and base coats used to make the reinforced layer. The manuscript presents our own new method for assessing ETICS resistance to hail and test results obtained according to this method. The basic premise of the presented new research methodology is evaluation of the thermal insulation system surface damage and fracture toughness, in the function of hit velocity with a polyamide ball with a standardized diameter and weight. The results of hail resistance tests were compared with the values of hard body impact resistance obtained in the tests done according to ETAG 004. Results obtained by the new method help to evaluate precisely the resistance of thermal insulation sets to damage as a result of impact of heavy objects of permanent shape, with greater accuracy than the hard body impact test. They also confirmed that thermal insulation sets with dispersion adhesive in the reinforcement demonstrate greater resistance to damage as a result of hail impact than the sets with cement-based adhesives and that weight of the reinforcing mesh used in the system is not significant to affect the hail resistance.

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Impact resistance of external thermal insulation systems

MATEC Web of Conferences ◽

10.1051/matecconf/201816308004 ◽

2018 ◽

Vol 163 ◽

pp. 08004 ◽

Cited By ~ 1

Author(s):

Ewa Sudoł ◽

Dawid Dębski ◽

Renata Zamorowska ◽

Barbara Francke

Keyword(s):

Thermal Insulation ◽

Impact Resistance ◽

Experimental Program ◽

Insulation Material ◽

Test Results ◽

Composite Systems ◽

Factors Influencing ◽

Insulation Systems ◽

The Impact ◽

Fibre Mesh

In the paper the results of an experimental program intended to determine factors influencing the impact resistance of the External Thermal Insulation Composite Systems (ETICS) were presented. For the research the systems based on polystyrene have been chosen. The insulation material was faced with a rendering consisting of base coat reinforced with standard or armored glass fibre mesh and silicone or silicone-silicate binders as finishing coats. The influence of various renderings components was evaluated with respect to resistance to hard body impact and resistance to hail. The test results were discussed in the context of the possible impact level on ETICS in use.

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DYNAMIC IMPACT WEAR AND IMPACT RESISTANCE OF W-B-C COATINGS

Acta Polytechnica CTU Proceedings ◽

10.14311/app.2020.27.0037 ◽

2020 ◽

Vol 27 ◽

pp. 37-41

Author(s):

Josef Daniel ◽

Jan Grossman ◽

Vilma Buršíková ◽

Lukáš Zábranský ◽

Pavel Souček ◽

...

Keyword(s):

Impact Test ◽

Impact Load ◽

Protective Coatings ◽

Impact Resistance ◽

Impact Testing ◽

The Novel ◽

Test Results ◽

Dynamic Impact ◽

Impact Deformation ◽

The Impact

Coated components used in industry are often exposed to repetitive dynamic impact load. The dynamic impact test is a suitable method for the study of thin protective coatings under such conditions. Aim of this paper is to describe the method of dynamic impact testing and the novel concepts of evaluation of the impact test results, such as the impact resistance and the impact deformation rate. All of the presented results were obtained by testing two W-B-C coatings with different C/W ratio. Different impact test results are discussed with respect to the coatings microstructure, the chemical and phase composition, and the mechanical properties. It is shown that coating adhesion to the HSS substrate played a crucial role in the coatings’ impact lifetime.

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Using the Plate-Creep test to determine the impact strength properties of concrete

Journal of Engineering Research ◽

10.36909/jer.14429 ◽

2021 ◽

Author(s):

Murat Gökçe ◽

Keyword(s):

Impact Strength ◽

Creep Test ◽

Impact Test ◽

Impact Resistance ◽

Strength Properties ◽

Test Results ◽

Test Device ◽

Concrete Mixtures ◽

Repetitive Impact ◽

The Impact

The paper aims to design a concrete against repetitive impact and abrasion resistance. Macro/micro steel fibers and two types of crushed stone based on limestone and corundum as aggregate were used in concrete mixtures. Impact test device has been modified, designed and used for impact strength testing of concrete. The usability of the plate creep test in determining the impact strength of concrete was also investigated. According to the test results, a high correlation was found between the abrasion, impact resistance tests and the creep test.

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Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete

Materials ◽

10.3390/ma14195833 ◽

2021 ◽

Vol 14 (19) ◽

pp. 5833

Author(s):

Nandhu Prasad ◽

Gunasekaran Murali ◽

Nikolai Vatin

Keyword(s):

Test Performance ◽

Impact Test ◽

Impact Resistance ◽

American Concrete Institute ◽

Functionally Graded ◽

Test Results ◽

Two Stage ◽

Polypropylene Fibres ◽

Fibre Composites ◽

Fibrous Concrete

This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructions. FTSFC was developed based on the bio-inspiring strength of turtle shells. The excellent impact resistance of FTSFC was accomplished by including a larger quantity of steel and polypropylene fibres in the outer layers. At the same time, one- and two-layered concrete were cast and compared to evaluate the efficiency of three-layered FTSFC. To minimize the dispersed test results, a modified form of the 544 drop-mass impact test was recommended by the American Concrete Institute (ACI). The modification was a knife-edge notched specimen instead of a solid cylindrical specimen without a notch. This modification predefined a crack path and reduced the dispersion of results. Cracking and failure impact numbers, ductility index, and failure mode were the testing criteria. The suggested modification to the ACI impact test decreased the coefficient of variance, showing that the dispersion of test results was reduced significantly. This study led to the concept of creating improved, fibre composites with better impact resistance for potential protective constructions.

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Structure of Alumina Layer on the Damage Resistance of Multilayered CVD Coating under Repeated Impact Loading

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.373-374.113 ◽

2008 ◽

Vol 373-374 ◽

pp. 113-116

Author(s):

Xiao Dong Zhu ◽

Hai Lin Dou ◽

Zhi Gang Ban ◽

Yi Xiong Liu ◽

Jia Wen He

Keyword(s):

Metal Cutting ◽

Impact Test ◽

Impact Resistance ◽

Cutting Tools ◽

Coarse Grained ◽

Test Results ◽

Repeated Impact ◽

Alumina Layer ◽

Al2o3 Layer ◽

Α Al2o3

Repeated impact test is an appropriate way to evaluate coating properties of metal cutting tools since the cyclic impact loading applied in the test simulates the interrupted cutting process. For hard CVD coatings with multi-layered structure, the alumina is usually of the lowest toughness and adhesion, and relatively easy to fail in the metal cutting. In the present paper, multilayered coatings consisting medium temperature TiCN, Al2O3 and TiN were deposited by chemical vapor deposition (CVD) on the tungsten carbide/cobalt substrate and evaluated using scratch adhesion test and repeated impacted test. The phase structure of alumina layers are α or )κ as usually applied in cutting tools, and the grain size for the α phase one is varied from one micron to four microns. The scratch and indentation test results show that the alumina layer of κ phase is easy to remove under the quasi-static loading, implying brittleness and low adhesion. The repeated impact test results reveal lower impact resistance for the κ phase alumina, and only adhesive failure can be found, which differs to that of the α phase one. The coarse grained α-Al2O3 layer shows similar adhesion compared to the fine grained α- Al2O3 in scratch test. The failure mode of the coating with coarse grained α-Al2O3 layer in the repeated impact test is primarily impact wear. No cohesive failure can be found at all load levels, and this leads to higher impact life than that of the fine grain one. It was shown that the relatively low adhesion of bottom TiCN layer may not affect the impact resistance.

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