Items tagged with DIFFUSION Files

File size: 2.57 MB Download

Sound scattering in rooms with ceiling treatment (NT TR 606)

NT TR 606

  • The objective in this project is to present a method for quantifying the diffusing effect of furniture and other equipment in rooms with ceiling treatment. The presence of furniture and equipment in this type of rooms will influence room acoustical parameters such as reverberation time, speech transmission index and sound pressure levels among others. A measure denoted equivalent scattering absorption area is introduced.

File size: 604.54 KB Download

Leaching of organic contaminants from construction debris - Development of a diffusion test procedure (NT TR 577)

NT TR 577

  • A test procedure has been designed to determine diffusion of organic contaminants from monolithic materials. The method is based on the use of a scavenger with a high sorption capacity which allows a near zero aqueous concentration and there by achieves a maximum diffusion gradient from the test object.

File size: 336.70 KB Download

Concrete, mortar and cement-based repair materials: Chloride migration coefficient from non-steady-state migration experiments (NT BUILD 492)

NT BUILD 492

  • This procedure is for determination of the chloride migration coefficient in concrete, mortar or cement-based repair materials from non-steady-state migration experiments.

File size: 65.62 KB Download

Concrete, hardened: Accelerated chloride penetration (NT BUILD 443)

NT BUILD 443

  • This Nordtest method specifies a procedure for the determination of penetration parameters for estimating the resistance against chloride penetration into hardened concrete or other cement-based materials.

    The resistance against chloride penetration is determined by accelerated testing.

Nordtest

Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.