Items tagged with CONCRETE Files

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.

File size: 82.56 KB Download

Concrete, mortar and cement based repair materials: Chloride diffusion coefficient from migration cell experiments (NT BUILD 355 - Edition 2)

NT BUILD 355

  • The steady state chloride ion diffusion coefficient of concrete, mortar and cement based repair materials is determined by an accelerated laboratory test method. The amount of chloride vs. time passing through a porous material exposed to a constant direct voltage is measured after steady state is reached, in order to calculate a chloride diffusion coefficient.

File size: 35.83 KB Download

Concrete injection resin: Shear bond strength (NT BUILD 350)

NT BUILD 350

  • This test determines the bond strength between injection resin and concrete. The test is conducted as a slant shear test using concrete prism halves glued together with the resin under study.

File size: 96.30 KB Download

Concrete, hardened: Air void structure and air content (NT BUILD 240)

NT BUILD 240

  • 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, specific surface, spacing factor and air-void distribution.

File size: 48.93 KB Download

Concrete, hardened: Ultrasonic pulse velocity (NT BUILD 213)

NT BUILD 213

  • This NORDTEST method is intended for the determination of the ultrasonic pulse velocity in concrete employing a s.c. dual recording equipment. Ultra sound is sound with a frequency above 20 kHz, (see Note 1).

File size: 180.15 KB Download

Concrete, hardened: Core bending test (NT BUILD 212)

NT BUILD 212

  • This NORDTEST method is intended for the determination of the force that is needed to break off a concrete cylinder from a completed object of the measures stated in Fig. 1. This force is here defined as the breaking force.

File size: 70.48 KB Download

Concrete, hardened: Pullout strength (NT BUILD 211)

NT BUILD 211

  • This NORDTEST method is intended for the determination of the force needed for pulling out a circular pullout insert that has been cast in the concrete. This force is in this context defined as the pullout force. It is also possible to exert a pull with a certain amount of force without thereby causing a break in the concrete.(See Note 1).

File size: 25.13 KB Download

Concrete, hardened: Rebound number (NT BUILD 210)

NT BUILD 210

  • This NORDTEST method is intended for the-determination of the rebound number of a concrete surface, that is, the value obtained when a rebound hammer is used in the manner described in 4, (Note 1).

File size: 32.57 KB Download

Concrete, hardened: Density (NT BUILD 207)

NT BUILD 207

  • This NORDTEST method is intended for the determination of the density of test specimens of concrete made from normally occurring types of rock-type aggregate. The aim of the method is to determine the density of the concrete with an accuracy within ± 20 kg/m3.

File size: 22.38 KB Download

Concrete, hardened: Compressive strength – accelerated curing for 24 hours (NT BUILD 206)

NT BUILD 206

  • The NORDTEST method is intended for the determination of the compressive strength of test specimens at 24 hours age after they have been made subject to heat curing.

File size: 51.63 KB Download

Concrete, hardened: Modulus of elasticity in compression (NT BUILD 205)

NT BUILD 205

  • This NORDTEST method is intended for the determination of the modulus of elasticity of test specimens made of hardened concrete with normally existing rock-type aggregate.

File size: 42.77 KB Download

Concrete, hardened: Tensile strength of test specimens (NT BUILD 204)

NT BUILD 204

  • This NORDTEST method is intended for the determination of the tensile strength of cast or core drilled test specimens of hardened concrete made with normally existing rock-type aggregate, see Comments.

File size: 23.42 KB Download

Concrete, hardened: Compressive strength of test specimens (NT BUILD 203)

NT BUILD 203

  • This NORDTEST method is intended for the determination of the compressive strength of cast or drilled test specimens of hardened concrete made with normally existing rock-type aggregate.

File size: 24.47 KB Download

Concrete, hardened: Sampling and treatment of cores for strength tests (NT BUILD 202)

NT BUILD 202

  • This NORDTEST method is intended for the sampling and treatment of cylindrical test specimens of concrete intended for determination of strength and containing naturally occurring rock-type aggregate.

File size: 26.63 KB Download

Concrete: Making and curing of moulded test specimens for strength tests (NT BUILD 201)

NT BUILD 201

  • SCOPE AND FIELD OF APPLICATION

    This NORDTEST method is intended for the making and curing of cast test specimens made from concrete containing naturally existing rock-type material, which are intended for strength tests.

    The method presupposes that the maximum nominal particle size in the concrete is at the most l/3 of the smallest measure of the intended test specimen and that the consistency of the fresh concrete is more fluid than 20 Vebe acc. to NT BUILD 193.

    In the main, the method agrees with ISO/DIS 2736/2.3. With regard to deviations see Comments.

File size: 51.63 KB Download

Concrete, hardened: Dimensions of test specimens (NT BUILD 200)

NT BUILD 200

  • This NORDTEST method defines the recommended dimensions of test specimens of hardened concrete, made in the shape of a cube or a cylinder. Furthermore, the method specifies how to determine the shape- and size deviations of test specimens.

File size: 18.76 KB Download

Concrete, fresh: Chloride content (NT BUILD 199)

NT BUILD 199

  • This NORDTEST method specifies a method for the determination of the chloride content in fresh concrete.

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