Standard Test Methods for:Determining the Water Content of Freshly Mixed Concrete (Discontinued 1998)

10.1520/c1079 ◽  
1998 ◽  
Author(s):  
Keyword(s):  
Water Content ◽  
Test Methods ◽  
Standard Test ◽  
Mixed Concrete

Materials for 3D Concrete Printing: Approach to Standardization in Russia

2021 ◽  
Vol 1043 ◽  
pp. 141-148
Author(s):  
Aleksey Adamtsevich ◽  
Andrey Pustovgar ◽  
Liubov Adamtsevich
Keyword(s):  
3D Printing ◽  
Test Methods ◽  
Standard Test ◽  
Material Consumption ◽  
Technical Base ◽  
Printing Ink ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

3D Concrete Printing (3DCP) technology, compared to traditional monolithic construction, gives a possibility to increase the workspeed and reduce the manual laborproportion, reduce material consumption and also improve the architectural appearance of buildings being erected. At the same time, more stringent requirements are imposed on the material for 3D printing in terms of rheological characteristicscontrol, strength developmentkinetics, interplay adhesion and some other parameters than for conventional ready-mixed concrete. Therefore, to ensure the mass application of technologies for additive construction production using concrete as printing ink, it is necessary to develop a regulatory and technical base, including the development of standard test methods to determine the operational properties of this typeofmaterials. The article examines the main trends in the management of the materials’properties for construction 3D printing based on cement binders and describes the principles of building a system for standardizing materials for 3D printing construction in Russia, which was developed with the participation of the authors of this article.

scholarly journals Comparison of Two Intergranular Corrosion Tests on EN AW-6016 Sheet Material

2021 ◽  
Vol 11 (11) ◽  
pp. 5294
Author(s):  
Peer Decker ◽  
Ines Zerbin ◽  
Luisa Marzoli ◽  
Marcel Rosefort
Keyword(s):  
Optical Microscopy ◽  
Intergranular Corrosion ◽  
Sheet Material ◽  
Test Methods ◽  
Standard Test ◽  
Corrosion Depth ◽  
Corrosion Tests ◽  
Automotive Company ◽  
Test Parameters

Two different intergranular corrosion tests were performed on EN AW-6016 sheet material, an ISO 11846:1995-based test with varying solution amounts and acid concentrations, and a standard test of an automotive company (PV1113, VW-Audi). The average intergranular corrosion depth was determined via optical microscopy. The differences in the intergranular corrosion depths were then discussed with regard to the applicability and quality of the two different test methods. The influence of varying test parameters for ISO 11846:1995 was discussed as well. The determined IGC depths were found to be strongly dependent on the testing parameters, which will therefore have a pronounced influence on the determined IGC susceptibility of a material. In general, ISO 11846:1995 tests resulted in a significantly lower corrosion speed, and the corrosive attack was found to be primarily along grain boundaries.

Serviceability Assessment of a Printed Finish on T-Shirts

2021 ◽  
Vol 8 (2) ◽  
pp. 48-53
Author(s):  
Reannan Riedy ◽  
Meredith McQuerry
Keyword(s):  
Abrasion Resistance ◽  
Dimensional Change ◽  
Test Methods ◽  
Standard Test ◽  
Performance Expectations ◽  
Agricultural Worker ◽  
Soil Release ◽  
And Performance ◽  
Typical Consumer ◽  
Change Material

To improve the comfort of agricultural workers, a T-shirt with a printed active cooling finish was evaluated to determine if it would meet the wash life durability and performance expectations of such an arduous application. Six shirts with a printed phase change material (PCM) finish and six shirts without (control) were washed 50 times to replicate a typical consumer wash life. Shirts were evaluated for absorbency, dimensional change, colorfastness, crocking, abrasion resistance, soil release, and smoothness retention according to AATCC and ASTM standard test methods. Testing was conducted before laundering and after 1, 5, 10, 20, 30, 35, 40, 45, and 50 consumer laundry (CL) cycles. Absorbency and dimensional change were significantly influenced by the PCM finish. Results demonstrate the appropriateness of adopting such a finish technology for agricultural worker clothing applications.

Development of standard test methods for unmanned and manned industrial vehicles used near humans

2013 ◽  
Author(s):  
Roger Bostelman ◽  
Richard Norcross ◽  
Joe Falco ◽  
Jeremy Marvel
Keyword(s):  
Test Methods ◽  
Standard Test

scholarly journals Derived Interaction Parameters for the TSAI-WU Tensor Polynomial Theory of Strength for Composite Materials

2001 ◽  
Author(s):  
Steven J. DeTeresa ◽  
Gregory J. Larsen
Keyword(s):  
Hydrostatic Pressure ◽  
Fiber Composite ◽  
Strength Criterion ◽  
Test Methods ◽  
Standard Test ◽  
Transverse Compression ◽  
Strength Parameters ◽  
Carbon Fiber Composite ◽  
The Stability ◽  
Stability Limits

Abstract It is shown that the two interactive strength parameters in the Tsai-Wu tensor polynomial strength criterion for fiber composites can be derived in terms of the uniaxial or non-interacting strength parameters if the composite does not fail under practical levels of hydrostatic pressure or equal transverse compression. Thus the required number of parameters is reduced from seven to five and all five of the remaining strength terms are easily determined using standard test methods. The derived interactive parameters fall within the stability limits of the theory, yet they lead to open failure surfaces in the compressive stress quadrant. The assumptions used to derive the interactive parameters were supported by measurements for the effect of hydrostatic pressure and unequal transverse compression on the behavior of a typical carbon fiber composite.

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