Examination of Durability Test Methods for Building Materials Based on Performance Evaluation

2009 ◽  
pp. 119-119-12 ◽  
Author(s):  
T Nireki
Keyword(s):  
Performance Evaluation ◽  
Building Materials ◽  
Test Methods ◽  
Durability Test

On the Issue of Safe Use of Fiber Cement Materials in the Buildings and Structures

2021 ◽  
pp. 35-41
Author(s):  
N.I. Konstantinova ◽  
◽  
N.V. Smirnov ◽  
O.V. Krivoshapkina ◽  
O.I. Molchadskiy ◽  
...  
Keyword(s):  
Building Materials ◽  
Protective Coatings ◽  
Fire Hazard ◽  
Thermal Exposure ◽  
Test Methods ◽  
Test Method ◽  
Sand Mixture ◽  
Industrial Buildings ◽  
Experimental Complex ◽  
Combustible Materials

Fiber cement finishing materials are widely used in the construction of industrial buildings and structures due to the complex of valuable operational properties. In the Russian market there are fiber-cement panels with a variety of design solutions for their coloring and application of protective coatings. Fiber cement board is a strong and moisture-resistant composite material made from a cement-sand mixture, reinforcing cellulose fibers and special additives. Not being a non-combustible material, the fiber cement boards in accordance with the current mandatory requirements, as a decorative, finishing and facing material for walls and ceilings have restrictions on their use. Existing domestic requirements regarding the methodology for assessing the combustibility of fiber cement products largely narrow the field of using these materials. Therefore, it is advisable to develop the proposals for amending the test methods and the regulatory framework governing their fire-safe extended scope. In the course of this work execution, the main provisions of the regulatory and methodological framework that establish the requirements for the fire-safe use of fiber cement materials are analyzed. Experimental complex studies of fire hazard properties of various types of samples of the fiber cement finishing panels and slabs were carried out. It is established that fiber-cement materials belong to the class of the least fire-hazardous materials. Advisability is determined concerning the introduction to the national regulatory practice of GOST R «Building materials. Test method for fire hazard under thermal exposure with a single burner (SBI)». Classification parameters of the group of non-combustible materials NG2 were established to amend GOST R 57270—2016 (method 1). Classification parameters of the group of non-combustible materials NG2 for making changes in GOST R 57270—2016 (method 1) are established. Proposals were developed to expand the scope of application of the materials and products made of fiber cement as enclosing structures, partitions, and decorative finishes (cladding) in the buildings and structures.

scholarly journals Sustainable Test Methods for Construction Materials and Elements

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 606 ◽  
Author(s):  
Ewa Szewczak ◽  
Agnieszka Winkler-Skalna ◽  
Lech Czarnecki
Keyword(s):  
Building Materials ◽  
Negative Impact ◽  
Construction Materials ◽  
Test Methods ◽  
Material Behavior ◽  
Sustainable Building ◽  
Methods Development ◽  
Test Models ◽  
Complete Test ◽  
The One

The laboratory testing of the construction materials and elements is a subset of activities inherent in sustainable building materials engineering. Two questions arise regarding test methods used: the relation between test results and material behavior in actual conditions on the one hand, and the variability of results related to uncertainty on the other. The paper presents the analysis of the results and uncertainties of the simple two independent test examples (bond strength and tensile strength) in order to demonstrate discrepancies related to the ambiguous methods of estimating uncertainty and the consequences of using test methods when method suitability for conformity assessment has not been properly verified. Examples are the basis for opening discussion on the test methods development direction, which makes possible to consider them as ‘sustainable’. The authors address the negative impact of the lack of a complete test models taking into account proceeding with an uncertainty on erroneous assessment risks. Adverse effects can be minimized by creating test methods appropriate for the test’s purpose (e.g., initial or routine tests) and handling with uncontrolled uncertainty components. Sustainable test methods should ensure a balance between widely defined tests and evaluation costs and the material’s or building’s safety, reliability, and stability.

scholarly journals Material characterization models and test methods for historic building materials

2017 ◽  
Vol 132 ◽  
pp. 315-320
Author(s):  
Tessa Hansen ◽  
Ruut Hannele Peuhkuri ◽  
Eva B. Møller ◽  
Søren Peter Bjarløv ◽  
Tommy Odgaard
Keyword(s):  
Material Characterization ◽  
Building Materials ◽  
Test Methods ◽  
Historic Building

To the Problems of Determination of Dynamic Elasticity Modules of Calcium Silicate Bricks by Means of Resonance Method

2014 ◽  
Vol 897 ◽  
pp. 139-143 ◽  
Author(s):  
Jiří Brožovský ◽  
Ámos Dufka
Keyword(s):  
Modulus Of Elasticity ◽  
Calcium Silicate ◽  
Building Materials ◽  
Resonance Method ◽  
Pulse Method ◽  
Ultrasonic Pulse ◽  
Test Methods ◽  
Test Method ◽  
Resonance Test ◽  
Accuracy Of Measurement

Modulus of elasticity of building materials can be determined in a static way (loading in a press) or by means of non-destructive test methods (ultrasonic pulse method and resonance method); the parameter is most frequently determined for concrete and both methods of determining elasticity modulus are codified in Standards. Elasticity characteristics of calcium silicate bricks were determined by means of resonance test method. Because the shape of calcium silicate bricks (a block with oblong foot) is different from the shape of test specimens for concrete (usually blocks with square foot), expected frequencies for verification of accuracy of measurement by resonance method were determined. Moisture content of calcium silicate bricks (water absorbing capacity is up to 12-14%) has influence on the value of resonance frequency. Difference between dynamic Young's modulus of elasticity from fundamental longitudinal and transverse resonant frequency is on average 2.8%.

Ethylene Glycol Accelerated Weathering Test: An Improved, Objective Aggregate Durability Test Method

2017 ◽  
Vol 2655 (1) ◽  
pp. 27-35
Author(s):  
Petrus G. L. van Blerk ◽  
Enrico Fletcher ◽  
Seosamh B. Costello ◽  
Theuns F. P. Henning
Keyword(s):  
Ethylene Glycol ◽  
Clay Minerals ◽  
Road Construction ◽  
Test Methods ◽  
Test Method ◽  
Accelerated Weathering ◽  
Visual Interpretation ◽  
Durability Test ◽  
Spalling Fracture ◽  
Accelerated Weathering Test

Ethylene glycol has been used extensively by the concrete and road construction industries to identify rock durability issues associated with smectite clay minerals. The presence of these clay minerals is synonymous with rock degradation under normal environmental wetting and drying cycles. However, such historical test methods are predominately based on a subjective visual interpretation, describing the observed degradation of individual rock pieces at fixed time intervals during the soaking process. In addition, some test methods include complex equations with multiple weighting factors applied to nominated degradation descriptors (e.g., spalling, fracture, and disintegration) used to calculate a single durability indicator. This paper describes the development and implementation of an alternative, nonsubjective accelerated weathering test that also uses ethylene glycol. The research included metamorphic and volcanic rock types used extensively in New Zealand for road construction. The greatest benefit of the proposed new test method is the ability to eliminate the subjective visual assessment described in historical test methods and adequately quantify results to specify contractual acceptance and rejection criteria. The test method also shows that good repeatability is possible from duplicate test samples. However, rock quality and quarry production consistency will influence the ability of the test method to report the same “percentage change in fines” over a prolonged test period. This phenomenon was particularly evident with problematic and lower quality rock. The test findings are well supported by observed field performance, thus giving confidence in the new method’s usefulness.

scholarly journals Comparative study of durability test methods for pellets and briquettes

2006 ◽  
Vol 30 (11) ◽  
pp. 964-972 ◽  
Author(s):  
M TEMMERMAN ◽  
F RABIER ◽  
P JENSEN ◽  
H HARTMANN ◽  
T BOHM
Keyword(s):  
Comparative Study ◽  
Test Methods ◽  
Durability Test
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