NT Methods Archive

Here you can find and download all published NT Methods.

NT Methods Files

File size: 44.65 KB Download

Building materials: Emission of volatile compounds - field and laboratory emission cell (flec) (NT BUILD 438)

NT BUILD 438

  • This general NORDTEST method specifies a laboratory test procedure for evaluation of the emission of volatile compounds from materials as well as combinations of materials which may affect indoor air quality. The method can be used to rank various products and product types with respect to their emission profiles (e.g. emission factors, specific organic compounds emitted) in e.g. product development.

File size: 24.54 KB Download

Concrete, hardened and mortar: Calcium oxide and soluble silica contents (NT BUILD 437)

NT BUILD 437

  • This is a method for determining calcium oxide content and soluble silica content of concrete. The results can be used to estimate the cement content of concrete and sometimes the type of cement. However, this estimation is outside the scope of this method.

File size: 31.93 KB Download

Concrete and mortar: Binder content by calculation from chemical analysis (NT BUILD 436)

NT BUILD 436

  • The method can be applied to calculation of the cement content of concrete and the binder content of mortar on the basis of chemical analysis of the calcium oxide and soluble silica content in the sample and loss on ignition of the sample.

File size: 20.05 KB Download

Roofing membrane underlay (insulation material): Ageing due to increased humidity and heat (NT BUILD 434)

NT BUILD 434

  • The aim of this method is to expose insulation materials to accelerated ageing due to increased temperature and heat.

File size: 71.90 KB Download

Concrete: Cracking tendency - exposure to drying during the first 24 hours (NT BUILD 433)

NT BUILD 433

  • This Nordtest method is intended for the determination of the cracking tendency of concrete at early ages. The test is performed on 3 ring shaped specimens exposed to an air stream of defined velocity, temperature and relative humidity the first 20-24 hours after casting. The crack development is judged quantitatively at the end of this period.

File size: 55.01 KB Download

Indoor climate, relative humidity: Measured by wooden probes (NT BUILD 432)

NT BUILD 432

  • The test method specifies equipment and a procedure to measure the average relative humidity of air over a long period of time.

    The average relative humidity of air in an environment is determined by first deploying a number of wooden probes and after a period of time there will be a balance between the humidity in the probe and the surrounding air. The probes are then brought back to the laboratory where the relative humidity measurements on the probes are performed.

File size: 74.85 KB Download

Roof sarking: Impact resistance (NT BUILD 431)

NT BUILD 431

  • This Nordtest method specifies a test procedure for determining the soft body impact resistance of sarking or nonloadbearing roof underlay on timber rafters.

File size: 18.13 KB Download

Concrete and mortar, polymer cement (pcc): Consistency (NT BUILD 429)

NT BUILD 429

  • This method is a recommendation for the appropriate laboratory test method for consistency of polymer cement concretes and mortars (PCC) to be used as a simple quantitative statement of behaviour under particular circumstances.

File size: 16.71 KB Download

Concrete and mortar, polymer cement (pcc): Moulded test specimens - curing (NT BUILD 428)

NT BUILD 428

  • This method is intended for the making and curing of cast test specimens made from polymer cement concrete and mortar (PCC) containing polymer latex.

    The method describes the optimum curing and storage conditions of PCC specimens. The initial wetting period is necessary to ensure satisfactory cement hydration, while the late dry period is needed to give the optimum binding conditions for the latex.

File size: 35.57 KB Download

Concrete, fresh: Compactibility with ic-tester (intensive compaction tester) (NT BUILD 427)

NT BUILD 427

  • The IC-tester compacts the mass sample (ca. 0.8 dm3) using a continuous, kneading action. Pressure and cyclic shearing is applied to the mass. At the end of the test an ICT-index is obtained which describes the amount of work needed to compact the sample to a specified density. The compaction takes place in a test cylinder with oscillating end plates in such a way that the concrete mass is subjected to cyclic shearing. The concrete cylinder which is obtained after the compaction may be subjected to compressive or splitting strength tests at different ages.

    This method can be employed in quality control of concrete as well as in research and product development.

File size: 960.45 KB Download

Wood: Fracture energy in tension perpendicular to the grain (NT BUILD 422)

NT BUILD 422

  • This standard specifies a method for determining the fracture energy of wood in tension perpendicular to the grain (mode I).

File size: 83.12 KB Download

Roofs: Watertightness under pulsating air pressure (NT BUILD 421)

NT BUILD 421

  • This standard defines a method to be used for water-tightness testing under pulsating air pressure of building elements and components to be fitted in roofs and supplied in the form of completely assembled and finished units.

File size: 54.90 KB Download

Building materials, wood: Moisture content (NT BUILD 420)

NT BUILD 420

  • This Nordtest method describes a method for measuring the moisture content of wood. Since it utilizes wooden probes with built-in electrodes which are embedded in wooden parts of building constructions where they can be left, it is very suitable for measurements over longer periods.

File size: 34.98 KB Download

Masonry units: Frost resistance (NT BUILD 419)

NT BUILD 419

  • The method can be applied to determine the frost resistance of masonry units, clay bricks, using an accelerated test.

File size: 18.93 KB Download

Wall coverings: Waterproofing on small test pieces (NT BUILD 389)

NT BUILD 389

  • The scope of this Nordtest method is to test and evaluate the waterproofing of wall coverings or wall treatments intended for use on board materials.

File size: 112.37 KB Download

Concrete: Heat development (NT BUILD 388)

NT BUILD 388

  • The method can be applied to determine the amount of heat developed in concrete during the hardening process. The heat development is described in terms of the produced energy as a function of the maturity of the concrete.

    The information obtained may be used to predict the temperature development and distribution in a structure where concrete hardening is taking place under varying conditions.

File size: 29.00 KB Download

Insulation material as underlay for roofing membranes: Resistance to mechanical load on projecting ends (NT BUILD 387)

NT BUILD 387

  • The scope of this Nordtest method is to test the resistance to mechanical loads of projecting ends of insulation materials intended for use as underlay for roofing membranes.

File size: 18.15 KB Download

Insulation material as underlay for roofing membranes: Bowing under the effect of a thermal gradient (NT BUILD 386)

NT BUILD 386

  • The scope of this Nordtest method is to test the bowing of insulation material caused by a thermal gradient through the material.

File size: 38.51 KB Download

Insulation material as underlay for roofing membranes: Exposure to temperature variations (NT BUILD 385)

NT BUILD 385

  • The scope of this Nordtest method is to test the dimensional variation behaviour in the unrestrained state due to temperature variations.

File size: 70.21 KB Download

Floating floors: Structural classification (NT BUILD 384)

NT BUILD 384

  • This Nordtest method deals with a floor type which is designated “floating floor” and is defined in clause 2. The method specifies a static and alternating load (wheel load) test.

File size: 19.12 KB Download

Building gaskets: Tear resistance (NT BUILD 382)

NT BUILD 382

  • This test method has been specially developed to study the risk of tear propagation in gaskets fastened to a wooden substrate with staples or similar.

File size: 70.11 KB Download

Concrete, hardened: Air void structure and air content (NT BUILD 381)

NT BUILD 381

  • The method can be applied to determine the air content and air void structure in hardened concrete. The air void structure is described by means of the parameters, air void content, specific surface and spacing factor. Two methods are described in the standard, the linear traverse method and the modified point count method. The measurements can be performed on either face ground specimens or thin sections.

File size: 139.74 KB Download

Timber in structural sizes: Determination of shear strength and shear modulus parallel to the grain (NT BUILD 378)

NT BUILD 378

  • This NORDTEST method specifies a procedure for determining shear strength and shear modulus parallel to the grain of glued, laminated timber or solid timber in structural sizes. The method has been developed for testing Nordic pine and spruce but can also be used on other species.

File size: 61.66 KB Download

Protective paint coatings on steel: Accelerated corrosion test in high humidity air containing small amounts of sulphur dioxide (NT BUILD 377)

NT BUILD 377

  • This method specifies the test equipment, preparation of test specimens and the procedure for accelerated corrosion tests on protective paint coatings on steel. The corrosion test is conducted in an artificial atmosphere of air containing 1 ppm sulphur dioxide. Exposure takes place at a constant relative humidity of 95 % and at a constant temperature of 23 ºC.

File size: 23.78 KB Download

Insulation material, underlay for roofing membranes: Resistance to deformation at elevated temperature (NT BUILD 375)

NT BUILD 375

  • The scope of this NORDTEST method is testing at elevated temperature the deformation of insulation material used as underlay for roofing membranes.

File size: 116.25 KB Download

Timber in structural sizes: Strength and modulus of elasticity in compression perpendicular to the grain (NT BUILD 374)

NT BUILD 374

  • This NORDTEST method specifies a procedure for determining the strength and modulus of elasticity in compression perpendicular to the grain of glued laminated timber and solid timber in structural sizes. The method has been developed for testing Nordic pine and spruce but can also be used on other species.

File size: 170.25 KB Download

Timber in structural sizes: Strength and modulus of elasticity in tension perpendicular to the grain (NT BUILD 373)

NT BUILD 373

  • This NORDTEST method specifies a procedure for determining the strength and modulus of elasticity in tension perpendicular to the grain of glued laminated timber and solid timber in structural sizes. The method has been developed for testing Nordic pine and spruce, but can also be used on other species.

File size: 64.31 KB Download

Surface coating, cement mortar: Anti-carbonation effect (NT BUILD 372)

NT BUILD 372

  • This Nordtest Method specifies a procedure for the determination of the anti-carbonation effect of a surface coating system on concrete (cement mortar).

    The anti-carbonation effect is determined by accelerated comparative testing of coated and uncoated specimens.

File size: 42.49 KB Download

Sealed glazing units: Accelerated ageing (NT BUILD 371)

NT BUILD 371

  • This NORDTEST method specifies a test method for accelerated ageing of sealed glazing units.

File size: 74.73 KB Download

Mortar, hardened: Cementcontentandaggregate-binder ratio (NT BUILD 370)

NT BUILD 370

  • This NORDTEST method can be applied to estimate the cement content of the binder and the content of binder in hardened mortar, using microscopic investigation of thin sections.

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Nordtest

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