DIN 18560-7-2004 Floor screeds - Part 7 Heavy-duty screeds (industrial screeds)《地板找平层 第7部分 高负荷找平层(工业用找平层)》.pdf

1、 DEUTSCHE NORM April 2004DIN 18560-7 ICS 91.060.30 Together with DIN EN 13813:2003-01 supersedes DIN 18560-7:1992-05 Floor screeds in building construction Part 7: Heavy-duty screeds (industrial screeds) Estriche im Bauwesen Teil 7: Hochbeanspruchbare Estriche (Industrieestriche) Document comprises

2、11 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany

3、, has the exclusive right of sale for German Standards (DIN-Normen). English price group 7 www.din.de www.beuth.de !,inH“05.06 9707537DIN 18560-7:2004-04 2 Amendments This standard differs from the May 1992 edition as follows: a) the standard has been harmonized with DIN EN 13813; b) test methods ha

4、ve been harmonized with those specified in the DIN EN 13892 series of standards; c) normative references have been updated. Previous editions DIN 18560-5: 1981-08 DIN 18560-7: 1992-05 DIN 18560-7:2004-04 3 Contents Page Foreword .4 1 Scope4 2 Normative references4 3 Requirements.5 3.1 General .5 3.2

5、 Mastic asphalt screed .5 3.3 Synthetic resin screed 6 3.4 Magnesite screed 7 3.5 Cementitious hard-aggregate screed7 4 Structural requirements8 4.1 Bonded screed.8 4.2 Screed on an insulating or separating layer 8 5 Testing8 5.1 Initial type testing, production control and hardening tests 8 5.2 Con

6、firmation (autocontrol) testing 8 6 Workmanship.10 6.1 General .10 6.2 Mastic asphalt screed .10 6.3 Synthetic resin screed 10 6.4 Magnesite screed 10 6.5 Double-layer cementitious hard-aggregate screed .10 6.6 Single-layer cementitious hard-aggregate screed.10 7 Designation 10 DIN 18560-7:2004-04 4

7、 Foreword The DIN 18560 series of standards has been revised by Technical Committee Estriche im Bauwesen of the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee) in response to the publication of DIN EN 13813. The DIN 18560 series of standards comprises the following: Par

8、t 1: General requirements, testing and construction; Part 2: Floor screeds and heating floor screeds on insulation layers; Part 3: Bonded screed; Part 4: Screeds on a separating layer; Part 7: Heavy-duty screeds (industrial screeds). 1 Scope This standard, in conjunction with DIN 18560-1 and DIN EN

9、13813, specifies requirements for and the testing and construction of floor screeds made from mastic asphalt, synthetic resin, magnesite or cementitious hard aggregate, which are not intended to receive flooring, and which will be subjected to the types of loading listed in table 1. It does not appl

10、y to screed on which industrial trucks running on steel rollers exert loads greater than 40 N/mm2. When selecting a heavy-duty screed on the basis of its intended purpose, loads other than those referred above (e.g. thermal, moisture or chemical loads) and other requirements to be met by the screed

11、(e.g. electrical conductivity, slip resistance) shall be taken into consideration at the planning stage. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, a

12、nd the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies

13、 (including any amendments). DIN 1100, Hard aggregate for cementitious floor screeds DIN 1045-2, Plain, reinforced and prestressed concrete structures Specification, performance, production and conformity of concrete (Application document for use with DIN EN 206) DIN 18560-1, Floor screeds in buildi

14、ng construction General requirements, testing and construction DIN 18560-2, Floor screeds in building construction Floor screeds and heating floor screeds on insulation layers DIN 18560-7:2004-04 5 DIN 18560-3, Floor screeds in building construction Bonded screed DIN 18560-4, Floor screeds in buildi

15、ng construction Screeds on a separating layer DIN EN 12697-20, Bituminous mixtures Test methods for hot mix asphalt Part 20: Indentation using cube or Marshall specimens DIN EN 13813, Screed material and floor screeds Screed material Properties and requirements DIN EN 13892-3, Methods of test for sc

16、reed materials Part 3: Determination of wear resistance (Boehme) DIN EN 13892-8, Methods of test for screed materials Part 8: Determination of bond strength 3 Requirements 3.1 General Heavy-duty screed shall meet the general requirements specified in DIN 18560-1 and be capable of withstanding the ty

17、pe of loading specified for the relevant load group in table 1 of the present standard. Table 1 Load groups Loading from Load group industrial trucks (wheel materials)awork processes and foot traffic (examples) I (heavy) Steel and polyamide Handling, dragging, rolling of metal parts, setting down of

18、 goods using metallic forks. Foot traffic: More than 1 000 persons per day. II (medium) Urethane elastomer Vulkollan (poly-urethane) and rubber Dragging and rolling of wood, paper reels and plastic parts. Foot traffic: 100 to 1 000 persons per day. III (light) Cushion or pneumatic tyres Work on asse

19、mbly benches. Foot traffic: Up to 100 persons per day. a Applies only where wheels are clean. Hard materials and dirt ingrained in tyres increases loading. In multi-layer screeds, the deformation behaviour of the layers, their interaction and their influence on the structural base shall be coordinat

20、ed. The deformability of the screed and base shall be given particular consideration where guided industrial trucks are used. 3.2 Mastic asphalt screed As a rule, mastic asphalt screed is to be constructed as single-layer screed on a separating layer. The hardness class, nominal thickness and maximu

21、m aggregate size shall be taken from table 2 on the basis of the relevant load group and location of the screed. Mastic asphalt screed having a nominal thickness greater than 40 mm shall be laid in two layers. Minimum and maximum screed thicknesses are given in table 3 on the basis of the maximum ag

22、gregate size. DIN 18560-7:2004-04 6 Mastic asphalt screed of hardness class IC 10 shall not be exposed to imposed loads which result in a compressive stress greater than 1 N/mm2over a long period of time. Mastic asphalt screeds of other hardness classes have a lower load capacity. Table 2 Mastic asp

23、halt screeds Nominal thickness, maximum aggregate size and hardness class Hardness class as in DIN EN 13813 for screed in Load group as in table 1 Nominal thickness, in mm Max. aggregate size, in mm heated rooms unheated rooms and open areas cooled rooms I (heavy) 35 30 11 8 II (medium) 30 25 8 5 II

24、I (light) 30 25 8 5 IC 10 or IC 15 IC 15 or IC 40 IC 40 or IC 100 Table 3 Minimum and maximum thickness1)of mastic asphalt screeds Maximum aggregate size, in mm Minimum thickness, in mm Maximum thickness, in mm 11 30 45 8 25 35 5 20 30 3.3 Synthetic resin screed Synthetic resin screed used as heavy-

25、duty screed for industrial purposes is normally constructed as bonded screed. The nominal thickness, compressive and flexural strength classes, and bond strength class shall be taken from table 4 on the basis of the relevant load group. Table 4 Nominal thickness, compressive and flexural strength cl

26、ass, and bond strength class of synthetic resin screed Load group as in table 1 Compressive strength class Flexural strength class Nominal thickness, in mm Bond strength classaI (heavy) C 60 F 20 10 B 2,0 II (medium) C 60 F 20 10 B 2,0 III (light) C 40 F 12 5 B 1,5 a The bond strength test on a stan

27、dard substrate as described in DIN EN 13892-8 cannot be performed on screed which has been laid (i.e. on site). 1) The thickness values given here refer to the actual value, not the nominal value. DIN 18560-7:2004-04 7 Fire-dried quartz sand or a similar material with an optimized particle-size dist

28、ribution curve is to be used. The maximum aggregate size shall be no greater than 1/3 of the screed thickness. Because there has not been enough experience with the wear resistance test methods specified in DIN EN 13813, requirements for this property cannot be specified at present. 3.4 Magnesite sc

29、reed Magnesite screeds are normally constructed as bonded screed. When placed on an insulating or separating layer, it shall be constructed as a double-layer screed, in which case the lower screed layer shall be of at least compressive strength class C 12. The nominal thickness of single-layer magne

30、site screed should be no greater than 25 mm. In the case of double-layer bonded screed, the lower layer shall be at least 15 mm thick, and the top layer (wearing course) shall be at least 8 mm thick. However, when placed on an insulating layer, the lower layer shall be at least 80 mm thick, and when

31、 placed on a separating layer, it shall be at least 30 mm thick. Single-layer magnesite screed shall be of at least density class 1,4. The flexural strength and surface hardness classes of the screed, or the wearing course of double-layer screed, shall be at least as specified in table 5. Table 5 Fl

32、exural strength and surface hardness classes of magnesite screed Load group as in table 1 Flexural strength class Surface hardness class I (heavy) F 11 SH 200 II (medium) F 10 SH 150 III (light) F 8 SH 100 3.5 Cementitious hard-aggregate screed 3.5.1 General Cementitious hard-aggregate screed is to

33、be constructed using hard aggregate as in DIN 1100, normally as a single-layer bonded screed. When placed on an insulating or separating layer, it shall be constructed as a double-layer screed. The double-layer screed shall consist of hard-aggregate flooring (wearing course) on a lower screed layer,

34、 while single-layer screed shall only consist of hard-aggregate flooring. 3.5.2 Hard-aggregate flooring The nominal thickness of hard-aggregate flooring shall be as in table 6. Table 6 Nominal thickness of hard-aggregate flooring for cementitious hard-aggregate screed Nominal thickness, in mm, for f

35、lexural strength class Load group as in table 1 F 9A F 11M F 9KS I (heavy) 15 8 6 II (medium) 10 6 5 III (light) 8 6 4 DIN 18560-7:2004-04 8 3.5.3 Lower layer (for double-layer screed) The lower layer of double-layer cementitious hard-aggregate screed constructed as bonded screed shall be at least 2

36、5 mm thick. Where cementitious hard-aggregate screed is to be placed on a separating layer (e.g. a membrane), the lower screed layer shall be at least 80 mm thick and have a composition as in DIN 1045-2. Where such screed is to be placed on an insulating layer, structural analysis may indicate that

37、the lower screed layer needs to be thicker and/or requires reinforcement, depending on the type of insulation and magnitude of the imposed loads. The design of this type of screed shall be specified by the planner. The lower screed layer shall be at least of strength class C 35 or F 5 as in DIN EN 1

38、3813. Such lower layers are not to be used for constructing falls on flat surfaces. If a fall is required, it shall already be present in the base before the screed is laid. 4 Structural requirements 4.1 Bonded screed Bonded screed shall meet the structural requirements specified in DIN 18560-3, and

39、 its structural base shall be made of concrete of at least compressive strength class C 25/30 as in DIN 1045-2. 4.2 Screed on an insulating or separating layer Screed on an insulating layer shall meet the structural requirements specified in DIN 18560-2, while screed on a separating layer shall meet

40、 the structural requirements specified in DIN 18560-4. 5 Testing 5.1 Initial type testing, production control and hardening tests Initial type testing, production control and tests carried out during the hardening phase are to be carried out as necessary; details are specified in DIN 13813. 5.2 Conf

41、irmation (autocontrol) testing 5.2.1 Mastic asphalt screed Where confirmation testing of mastic asphalt screed is required, its hardness is to be determined by measuring the indentation as described in DIN EN 12697-20 and the specifications of table 8a in DIN EN 13813:2003-01 shall be met. 5.2.2 Syn

42、thetic resin screed Where confirmation testing of synthetic resin screed is required, its flexural strength shall be determined as in DIN 18560-3. The test piece shall be taken from the finished screed and be 10 mm thick and 40 mm wide. Ensure that the load is applied in the tension zone. The measur

43、ed value shall be equal to at least 80 % of the relevant value specified in table 4 of the present standard. DIN 18560-7:2004-04 9 5.2.3 Magnesite screed Where confirmation testing of magnesite screed is required, its flexural strength and surface hardness shall be determined as in DIN 18560-3. The

44、measured values shall be as specified in table 7 below. Table 7 Surface hardness and flexural strength values for confirmation testing of magnesite screed Surface hardness, in N/mm2Flexural strength, in N/mm2Flexural strength class Lowest single value Mean Lowest single value Mean F 11 140 160 8 9 F

45、 10 105 120 7 8 F 8 70 80 6 7 5.2.4 Cementitious hard-aggregate screed Where confirmation testing of hard-aggregate screed is required, the wear resistance (Bhme) of its surface is to be determined as in DIN EN 13892-3 and flexural strength is to be determined as in DIN 18560-3. Testing shall be car

46、ried out no earlier than 28 days after the screed has been laid. Measured values shall comply with the specifications of table 8 of the present standard. Wear resistance shall be tested on three test specimens cut from the screed (including part of the concrete slab, where necessary) and prepared as

47、 specified in DIN 18560-3. For testing flexural strength, at least three test specimens, cut from the screed, are to have the following dimensions based on d, the thickness of the hard-aggregate flooring: Height of double-layer screed: h = 2 d, but at least 20 mm Height of single-layer screed: h = d

48、, but at least 10 mm Length: l = 6 h Width: b = 40 mm Span: s = 5 h Table 8 Values for wear resistance (Bhme) and flexural strength of hard-aggregate flooring for confirmation testing of cementitious hard-aggregate screed Wear resistance (Bhme), in cm3/50 cm2Flexural strength, in N/mm2Flexural stren

49、gth class Highest single value Mean Lowest single value Mean F 9A 8 7 8 9 F 11M 5 4 10 11 F 9KS 2,5 2 8 9 DIN 18560-7:2004-04 10 6 Workmanship 6.1 General Heavy-duty screed shall be constructed as specified in DIN 18560-1 to DIN 18560-4, depending on the relevant binder, and as described below in subclauses 6.2 to 6.6. 6.2 Mastic asphalt screed Mastic asphalt screed shall be placed on a separating layer of temperature-resistant, non-compressible