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Współczesne domieszki do betonu w kontekście budownictwa komunikacyjnego

Rubin Jan Antoni

Magazyn Autostrady

2023

Nr 3

64--66

W artykule omówiono kwestie związane z wykorzystaniem domieszek w budownictwie komunikacyjnym, m.in. zawarte w Normie Europejskiej PN-EN 934-2+A1:2012.

The article discusses issues related to the use of admixtures in transportation engineering, including those contained in the European Standard PNEN 934-2+A1:2012.

Harmonization of technical requirements in the scope of machines for underground mines

Malec Małgorzata, Zając Romana

Mining Machines

2021

no. 2

44--52

In the European Union different methods of harmonizing technical requirements are accepted. The main legal instrument includes, among others, directives and European standards which are a key component of the European Single Market. European Standardization plays an important role in the development and consolidation of the European Single Market. The fact that each European Standard is recognized across the whole of Europe, and automatically becomes the national standard in 34 European countries, makes it much easier for businesses to sell their goods or services to customers throughout the European Single Market. This article presents general principles of implementing uniform technical requirements contained in the harmonized standards following the example of mining machines, in particular powered roof supports. The article concerns the standard EN 1804-Parts:1; 2; 3, i.e. Machines for underground mines - Safety requirements for hydraulic powered roof supports: - Part 1: Support units and general requirements, - Part 2: Power set legs and rams, - Part 3: Hydraulic and electrohydraulic control systems. The authors described the work results of the Technical Committee CEN/TC 196 “Mining machinery and equipment - Safety”, over the years 2017-2020, oriented onto establishing three new edition of standards. These new edition of standards have been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of EU Directives.