Categories starting with C

Items starting with C Files

File size: 1.97 MB Download

Concrete, mortar, hardened: Water permeability of water-saturated concrete (NT BUILD 506)

NT BUILD 506

  • This NORDTEST method is intended for the determination of the water permeability of cast or drilled test specimens of hardened, water-saturated concrete or mortar.

File size: 2.86 MB Download

Cladding panels: Field method for measurement of bowing (NT BUILD 500)

NT BUILD 505

  • This Nordtest method specifies a methodology and a measuring device (the ”Bow- meter”) for carrying out field measurements of dimensional changes and deformation of natural stone panels used as exterior cladding [1]. The method represents a tool for the inspection and assessment of status and prediction of further development on existing facades where damage in the form of bowing of natural stone panels has been observed.

File size: 1.81 MB Download

Cladding panels: Test for bowing (NT BUILD 499)

NT BUILD 499

  • This Nordtest method describes a laboratory procedure for determining the bowing potential of natural stone panels intended for building facades. The method shall therefore be used to select natural stone types that are fit for cladding purposes, without demonstrating this phenomenon.

File size: 299.67 KB Download

Calibration of gypsum blocks for soil moisture measurements (NT BUILD 496)

NT BUILD 496

  • This test method covers the determination of calibration curves of gypsum blocks used to determine the suction pressure in soil.

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: 102.42 KB Download

Cement: Heat of hydration (NT BUILD 480)

NT BUILD 480

  • This method is used to determine the heat of hydration of cement in mortar, during the hardening process. The test procedure is identical to NT Build 388 and gives a specification regarding the mix proportion of the tested mortar. The heat developed is described as the amount of energy produced for different maturity ages of the mortar. To be able to define the heat development as energy per mass unit of cement, it is necessary to know the heat capacity of the components in the mortar.

File size: 53.19 KB Download

Concrete, fresh: initial setting time and activation energy during setting (NT BUILD 476)

NT BUILD 476

  • This NORDTEST method specifies a method for the determination of the initial setting of fresh concrete by measuring the heat development of the concrete during the first hours. A method of determination of the activation energy during the setting period is also specified.

File size: 31.48 KB Download

Concrete, autoclaved aerated: Length changes due to moisture variations (NT BUILD 444)

NT BUILD 444

  • This Nordtest method describes how to measure dimensional variations in autoclaved aerated concrete (AAC) exposed to different humidities.

    The method is primarily developed for testing freshly manufactured blocks or components, with special reference to quality declaration work at the factories, but the method can also be used for testing autoclaved aerated concrete cured over an extended period.

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.

File size: 35.84 KB Download

Concrete, hardened: relative humidity measured in drilled holes (NT BUILD 439)

NT BUILD 439

  • This method describes the measurement of the relative humidity of concrete by single measurements on site in a drilled hole.

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: 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: 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: 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: 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: 40.52 KB Download

Concrete, repair materials: Water diffusion (NT BUILD 369)

NT BUILD 369

  • The water diffusion coefficient of concrete repair materials and protecting coatings is determined by a laboratory test in which transfer of water occurs under the influence of differences in relative humidity. The diffusion coefficient is calculated on the basis of the loss of weight from a diffusion cell.

File size: 37.94 KB Download

Concrete, repair materials: Capillary absorption (NT BUILD 368)

NT BUILD 368

  • This method describes a laboratory test procedure to determine capillary water absorption of concrete repair mortars and protective coatings, based on weight recording. The absorbed amount of water is expressed as a function of the square root of time.

File size: 21.05 KB Download

Concrete, repair materials: Coefficient of thermal expansion (NT BUILD 367)

NT BUILD 367

  • This paper describes a laboratory procedure for determining the coefficient of thermal expansion of concrete repair mortars. The specimens are exposed to temperatures ranging from +5 ºC to +60 ºC. For each change of temperature, the longitudinal expansion is recorded.

File size: 44.74 KB Download

Concrete, repair materials and protective coating: Shrinkage and swelling (NT BUILD 366)

NT BUILD 366

  • The method describes a test for measuring the shrinkage or swelling of repair mortars during the hardening period and the subsequent desiccation period.

File size: 27.65 KB Download

Concrete, repair materials and protective coating: bond strenght, direct pull-off test (NT BUILD 365)

NT BUILD 365

  • The method describes a test for determination of the bond strength of a construction consisting of a standard concrete substructure on which a repair mortar or a repair system has been cast.

File size: 41.70 KB Download

Concrete surfaces, organic paints: Acid resistance (NT BUILD 363)

NT BUILD 363

  • This test determines the acid resistivity of solvent-based and water-based organic paints on concrete surfaces. The concrete test specimens are coated with the paints to be tested and then stored in sulphuric acid solutions.

File size: 53.32 KB Download

Concrete, hardened: Water-cement ratio (NT BUILD 361 - Edition 2)

NT BUILD 361

  • This NORDTEST method can be applied to estimate the water-cement ratio (W/C ratio) in hardened concrete, using microscopic investigation of thin sections. The method includes two impregnation techniques, vacuum impregnation with fluorescent epoxy and impregnation using the Fluorescent Liquid Replacement (FLR) technique. The latter technique supplements the epoxy impregnation at lower W/C-ratios. FLR technique is not applicable above W/C = 0.50.

File size: 56.24 KB Download

Concrete, repairing materialsand protective coating: Carbonation resistance (NT BUILD 357)

NT BUILD 357

  • The resistance against CO2-penetration through concrete repairing materials and concrete protective coating is determined by an accelerated laboratory test on laboratory prepared samples by exposing the samples to carbon dioxide enriched air in order to evaluate the effect of concrete repairing materials. The depth of CO2-penetration is measured by the phenolphthalein method.

File size: 39.74 KB Download

Concrete, repairing materials and protective coating: Embedded steel method, chloride permeability (NT BUILD 356)

NT BUILD 356

  • The chloride ion permeability of concrete repairing materials and concrete protective coating is determined by an accelerated laboratory test where a direct current voltage is applied between a steel rod embedded into the specimen and the specimen surface in order to evaluate the effect of concrete repairing materials.

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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”.