Items tagged with HARDENED CONCRETE Files

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: 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: 30.43 KB Download

Concrete, hardened: Chloride content by volhard titration (NT BUILD 208s)

NT BUILD 208s

  • This Nordtest method can be used for determination of the total chloride content in hardened concrete by dissolving the concrete dust in a solution of nitric acid followed by Volhard titration. Another possibility is to use potentiometric titration which gives better precicion and accuracy. This method is not described here.

File size: 54.11 KB Download

Concrete, hardened: Chloride content by volhard titration (NT BUILD 208)

NT BUILD 208

  • This Nordtest method can be used for determination of the total chloride content in hardened concrete by dissolving the concrete dust in a solution of nitric acid followed by Volhard titration. Another possibility is to use potentiometric titration which gives better precicion and accuracy. This method is not described here.

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.

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”.