Uploaded on 

 

DIN Part 5 - Download as PDF File .pdf), Text File .txt) or read online. DIN Part 5. This standard, together with DIN Part 1. June edition. DIN : - Download as PDF File .pdf), Text File .txt) or read online. Code. No 3 - BS - Part 2 - Methods of Determination of Density. 5 indicates that the structure of silica present in RHA used in the present study is of . permeability as accordance to German Standard DIN Section [26] and BS .. German Standard DIN Part 5, Section (). Testing.

Author:CLAUDETTE COUVILLION
Language:English, Spanish, Dutch
Country:Honduras
Genre:Children & Youth
Pages:213
Published (Last):28.11.2015
ISBN:845-6-43809-639-8
Distribution:Free* [*Register to download]
Uploaded by: LIDIA

59450 downloads 103654 Views 14.81MB PDF Size Report


Din 1048 Part 5 1991 Pdf

DIN Testing concrete; testing of hardened concrete (specimens Includes all amendments and changes through Change/Amendment, June . Science and Education Publishing, publisher of open access journals in the scientific, technical and medical fields. Read full text articles or submit your research. la din part 5: g.1 water proofing agent 1. depth of penetration bs en estomix g15 permeability medical-site.info free download here (din .

The durability of a concrete is closely related to its permeability. The permeability dictates the rate at which aggressive agents can penetrate to attack the concrete and the steel reinforcement. Water penetrability is defined as the degree to which a material permits the transport gases, liquids or ionic species through it. Water can be harmful for concrete, because of its ability to leach calcium hydroxide from the cement paste, to carry harmful dissolved species such as chlorides or acids into the concrete, to form ice in large pores in the paste, and to cause leaching of compounds from the concrete. Water absorption, sorptivity and water permeability measurement are some methods to determine the water penetrability of concrete. A triaxial cell permeability apparatus and method for determining water permeability of concrete are presented in this paper. Test results indicated that bacterial concrete is highly impermeable than normal concrete. Permeability measurement techniques and durability modeling are based on the Darcy equation for permeability based on measurement of flow rate, and the Valetta equation for permeability based on measurement of penetration depth and time. Bacteria built-in concrete works on the phenomenon of microbiologically induced calcite precipitation. Calcite crystals formed, due to microbial activities of bacteria Bacillus subtilus JC3, seals the cracks and pores in concrete and enhances the strength and durability of concrete by making concrete impermeable to transport different fluids or gases, like water, chlorides, sulfates or oxygen.

Flexural etrenglh and tenslle spllnlng strength Specimens for determining the flexural strength and tensile splitting strength cf. The compressive strength shall be given to the nearest 1 NlmmZ for va1ue. The volume shall be determined by measuring the specimen dimensions to an accuracy 01 1 mm and the specimen mass determined to an accuracy of The density obtained shall be given to the nearest 10 kglm'.

Din 1048 part 5 pdf

The density shall be determined before applying any capping layers necessary for further testing cf. From en, the dry density, end,shall be calculated using the following equation: 7. Where surfaces are uneven or not parallel, they shall be ground by the wet method or capped. The mixture shall be aDplied by means of a glass or steel capping plateso as io obtain plane and square end surfaces.

After grinding or capping, the specimens shall be further cured as specified before testing. The permeability test may be carried out using any equipment suitable for the procedure specified in subclause Accessories The following accessories shall be used for preparLngthe specimens.

General If the fresh concrete sample has to be transported. DIN shail meet at least the req.. Length measuring instruments e. Different results may be obtained when testing specimens prepared from the same concrete but different in size. Where the ConCrete is compacted by vibraa may be fitted On the The shall be filled with concrete to give an excess of about 20 to 30mm above its edge after compaction. The vibrator shall be immersed to a depth ot approximately 20mm above the base of the mould and left in this position until the formation of air bubbles of significant size has markedly decreased.

The specimens so produced shall be clearly and durably marked. For the compaction o! Once the concrete has hardened sufficiently. Specimen preparation shall be started as soon as possible aftersampJing and.

During storage in a motst cabinet. It shall then be gradually withdrawn from the concrete so that the hole left by the vibrator closes fully without any air haino entraooed. During hardening. Until testing.

DIN : Testing concrete; testing of hardened concrete (specimens prepared in mould)

Compaction lmmediately after filling the mould. Concrete used for the preparation of perme-. Concrete of consistence range KS may also be comoacted bv tamoina. Curing of Specimens 6 c I en. Before the soecimens are cast. Typical arrangement for determining the water permeability of mm x mm x mm slabs Figure 2.

When preparing mm long beams. Slabs used for the water permeability test shall be prepared with the mould standing upright so that i n the test. Prior to testing. For the preparation of specimens with an hld ratio greater than 2. Where concrete is compacted by means of an internal vibrator cf.

Compacting with immersion vibrator when preparing mm x mm x mm long beams made of non-absorbent material. The volume shall be determined by measuring the specimen dimensions to an accuracy 01 1 mm and the specimen mass determined to an accuracy of The load shall be applied steadily so as to increase the stress at a rate of 0.

The density obtained shall be given to the nearest 10 kglm'. They shall be supported over a span of mm and subiected to a central load i.

Shore A hardness 50 5 as in DIN The load shall not be applied until the upper platen of the testing machine i s ' i n full contact over its entire area with the upper surface of the specimen. Loading shall not be started until the loading rollers have been slowly lowered onto the specimen and all rollers are i n full contact with the beam.

After removal from the water. A minor unevenness of the surface may also be compensated for by rubber strips Of ".

The surface of the platens shall be free from oil residues. They shall be arranged so that the beam is supported over a span that is mm less than the beam length and that two equal loads. The load shall be applied so as to increase the stress at a rate of 0.

After grinding or capping. The flexural strength. The compressive strength shall be given to the nearest 1 NlmmZ for va1ue. The density shall be determined before applying any capping layers necessary for further testing cf.. From en. Where surfaces are uneven or not parallel.

The load shall be applied so as to increase the sires5 at a rate of approximately 0. The specimen shall be placed on the lower platen of the testinq machine and alianed with the centre of the thrust of the machine using a-centring device wherever possible.

The supporting and loading rollers of the testing machine shall have a circular cross section with a diameter of 20 mm to 40 mm and be at least 10 mm longer than the width of the beam. The mixture shall be aDplied by means of a glass or steel capping plateso as io obtain plane and square end surfaces.

Specimens to be dry-cured shall not be tested within 24 hours alter grinding or capping. Page Y is the specimen volume. Flexural etrenglh and tenslle spllnlng strength Specimens for determining the flexural strength and tensile splitting strength cf.

The laces of specimens to be tested at an age of up to seven days shall be wiped dry with a cloth alter moist curing and the specimens stored for approximately one hour at ambient temperature before testing. The compressive strength. Use of packing between the specimen and the platens is not permitted.

Flexural strength For flexure testing. Where the modulus of. Arrangement of loading of cylindrical specimens for determining the tensile splitting strength. Compacting with immersion vibrator when preparing mm x mm x mm long beams only being compacted by vibrating or rOdding, and porous lightweight aggregate concrete, only by rodding, in each case to a degree sufficient to provide a density not greater than that in the structure or structural member.

DIN1048 Part 5

When compacting concrete containing aggregates of significantly different particle densities e. The specimens so produced shall be clearly and durably marked. Once the concrete has hardened sufficiently, usually after 16 hours.

Until testing, they may be left on the baseplate to reduce the risk of damage. Immediately after preparation, specimens for suitability and quality testing shall be stored in the mould in a closed room at a draught-free location, protected from loss of water, at a temperature of 15 to 22C preferably at 2 C. After demoulding they shall be placed on gratings and cured in water or in a moist cabinet at 15 to 22 C preferably at 2 C.

During storage in a moist cabinet, lightweight concrete specimens shall be protected against the absorption of further moisture e. Prior to testing, hardened concrete specimens shall be stored in the mould and further cured under conditions as similar as possible to those existing in the concrete intended for use in the structure. Before the specimens are cast, the internal surface of the mould shall be thinly coated with oil, grease or release agent.

Where the concrete is compacted by vibration, a collar may be fitted on the mould. The mould shall be filled with concrete to give an excess of about 20 to 30 mm above its edge after compaction.

Similar articles


Copyright © 2019 medical-site.info.
DMCA |Contact Us