1、 DEUTSCHE NORM March 2006DIN 18560-3 ICS 91.060.30 Supersedes DIN 18560-3:2004-04 Floor screeds in building construction Part 3: Bonded screed Estriche im Bauwesen Teil 3: Verbundestriche Document comprises 9 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original shou
2、ld 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, has the exclusive right of sale for German Standards (DIN-Normen). English price group 7 www
3、.din.de www.beuth.de !,l($“10.06 9730501DIN 18560-3:2006-03 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Requirements.4 3.1 General4 3.2 Thickness .4 3.3 Strength or hardness class 4 3.4 Wear resistance class .4 4 Structural requirements 5 4.1 Structural base.5 4.2 Levelling screed
4、.6 4.3 Metallic inserts.6 4.4 Joints 6 4.5 Edge protection6 4.6 Joint filling6 5 Testing 6 5.1 Initial type testing, production control and hardening tests.6 5.2 Confirmation (autocontrol) testing 6 6 Workmanship .9 7 Designation 9 Foreword The DIN 18560 series of standards has been revised by Techn
5、ical 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: Part 1: General requirements, testing and workmanship; Part 2: Floating
6、screed; Part 3: Bonded screed; Part 4: Screed on a separating layer; Part 7: Heavy-duty screed (industrial screed). Amendments This standard differs from the April 2004 edition in that additional information is given in clause 1. DIN 18560-3:2006-03 3 Previous editions DIN 272-1: 1930-11, 1943-06 DI
7、N 272: 1963-07, 1978-03, 1986-02 DIN 18560-3: 1985-01, 1992-05, 2004-04 1 Scope This standard, in conjunction with DIN 18560-1 and DIN EN 13813 specifies requirements for and the testing and construction of floor screeds which are bonded to the structural base in order to render the base surface fit
8、 for use. Such screeds may be used with or without flooring. For bonded screeds which will be subjected to heavy loads, DIN 18560-7 also applies. This standard does not contain specifications relating to the laying of rigid flooring such as tiles and slabs by the thick bed method. 2 Normative refere
9、nces This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of t
10、hese 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 (including any amendments). DIN 1100, Hard aggregate for cementitious floor screed DIN 18202, Tolerances in building Struc
11、tures DIN 18560-1, Floor screeds General requirements, testing and workmanship DIN 18560-7, Floor screeds Heavy-duty screed (industrial screed) DIN 50014, Artificial climates in technical applications Standard atmospheres DIN EN 12697-20, Bituminous mixtures Test methods for hot mix asphalt Part 20:
12、 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 screed materials Part 3: Determination of wear resistance (Boehme) DIN EN 13892-4, Methods of test for screed materials Part 4
13、: Determination of wear resistance-BCA DIN EN 13892-6, Methods of test for screed materials Part 6: Determination of surface hardness DIN EN 13892-8, Methods of test for screed materials Part 8: Determination of bond strength DIN EN ISO 178, Plastics Determination of flexural properties (ISO 178:200
14、1) DIN 18560-3:2006-03 4 3 Requirements 3.1 General Bonded screeds shall meet the general requirements specified in DIN 18560-1. Wear resistance requirements can only be specified for bonded screed without flooring. 3.2 Thickness The thickness of bonded screeds shall be as in DIN 18560-1, but should
15、 not be less than approximately three times the maximum aggregate, for technical reasons. The nominal thickness of mastic asphalt bonded screed should be at least 20 mm. For single-layer screeds, the nominal screed thickness should be no greater than 40 mm for mastic asphalt screed, and 50 mm for ca
16、lcium sulfate, synthetic resin, magnesite and cementitious screeds. NOTE The thickness of bonded screed is not significant in terms of its loading capacity, as the bond between the screed and the base ensures the transmission of all static and dynamic loads. 3.3 Strength or hardness class The streng
17、th or hardness class shall be suited to the type of use and expected loading and shall be at least as specified in table 1. Table 1 Compressive and flexural strength classes, or hardness class Compressive and flexural strength classes, or hardness class as in DIN EN 13813, for screed Screed type wit
18、h flooring without flooring Calcium sulfate C20/F3 C25/F4 Synthetic resin C20/F3 C25/F4 Magnesite C20/F3 C25/F4 Cementitious C20/F3 C25/F4 Mastic asphalt in heated rooms IC10 or IC15 in unheated rooms and open areas IC15 or IC40 in cooled rooms IC40 or IC100 3.4 Wear resistance class The wear resist
19、ance class of bonded screed without flooring may be specified. If dry shake material is used to increase wear resistance, the amount of material applied per m2shall be stated. Only hard aggregate as in DIN 1100 may be used for this purpose. The level of wear resistance shall be demonstrated by means
20、 of initial type testing on the cementitious screed material and dry shake material to DIN 18560-3:2006-03 5 be used. This type of improved surface is not comparable to the hard-aggregate flooring specified in DIN 18560-7, however. 4 Structural requirements 4.1 Structural base The structural base sh
21、all meet all static and structural requirements. Table 2 lists the types of base material which are suitable for each screed material. The flatness of the base surface shall be within the tolerances specified in DIN 18202, except when cementitious screed is applied wet-on-wet to a concrete base. Tab
22、le 2 Suitability of base materials for different types of bonded screed Base material Screed material Concrete Calcium sulfate screed Magnesite screed Cementitious screed Mastic asphalt screedaWoodbSteelbCalcium sulfate screed + + o + o o o Mastic asphalt screed o o + o o Synthetic resin screed + o
23、o + o o o Magnesite screedc+ o + + o + o Cementitious screed + o + o o o Key: + suitable o suitable but requires special measures not suitable a Including other layers and bases containing bituminous binders. b Assuming adequate stiffness. c A separating layer is to be provided over reinforced concr
24、ete bases. Pipework, cables, etc. shall not be laid on the base (cf. subclause 4.2). To establish the bond between screed and base, the base surface shall be of adequate strength, shall have a clean, textured surface (which shall also be closed in the case of magnesite screed) and be as free of crac
25、ks and loose material as possible. It shall not be soiled with oil, petrol, mortar droppings, paints, etc. For concrete bases, any superfines, additives or hardening agents used to strengthen the concrete shall not impair adhesion between base and screed. If the base surface does not provide an adeq
26、uate bond for the screed, special measures shall be taken to ensure bonding (e.g. mechanical treatment or providing a special bonding layer). Cracks developing in the base can also cause cracks to develop in the corresponding area of the screed. The structural base for synthetic resin screeds shall
27、have a surface tensile strength of at least 1 N/mm2in systems which will not be subjected to traffic loads, and at least 1,5 N/mm2in systems which will be subjected to traffic loads. DIN 18560-3:2006-03 6 Joints in the base shall be squared, straight and in alignment, and shall preferably be butt jo
28、ints. Movement joints are to be kept as narrow as possible. 4.2 Levelling screed A levelling screed is necessary if the base is unduly uneven or if pipework or cables have been laid on it. The levelling screed shall be bonded to the base and cover the pipework and cables in such a way that it can se
29、rve as a base itself. 4.3 Metallic inserts Where necessary, metallic inserts shall be provided with corrosion protection that is compatible with the binder used in the screed. 4.4 Joints Movement joints shall be provided in the screed above structural joints. NOTE If induced contraction joints, butt
30、 joints or cracks in the base are not carried through to the screed, cracks may develop in the corresponding areas of the screed, although these generally do not impair its fitness for purpose. 4.5 Edge protection Any metal profiles used as edge protection shall be anchored in the base. 4.6 Joint fi
31、lling Joints in the screed should be filled with an appropriate sealant or provided with sealing strips to render them flush with the screed surface and protect them from soiling. Sealants or strips shall be suitable for the expected loading. 5 Testing 5.1 Initial type testing, production control an
32、d hardening tests Initial type testing, production control and tests during the hardening phase are to be carried out as necessary; details are specified in DIN EN 13813. 5.2 Confirmation (autocontrol) testing 5.2.1 General Where confirmation testing is required, the flexural strength of calcium sul
33、fate, synthetic resin, magnesite and cementitious screeds of up to 40 mm nominal thickness shall be determined. In the case of greater nominal thicknesses, the compressive strength shall also be tested. Wear resistance may need to be determined for calcium sulfate, synthetic resin and cementitious s
34、creeds, while the surface hardness of magnesite screed may need to be determined. The hardness of mastic asphalt screed is to be tested. The mean flexural strength of screeds up to 40 mm nominal thickness shall be equal to at least 80 % of the value specified in DIN EN 13813 for the designated flexu
35、ral strength class, while the lowest single value shall be equal to at least 70 % of the specified value. When compressive strength is determined, the mean shall be equal to at least 70 % of the value specified in DIN EN 13813 for the designated compressive strength class and the lowest single value
36、 shall be equal to at least 60 % of the specified value (for nominal thicknesses greater than 40 mm). DIN 18560-3:2006-03 7 The mean wear resistance shall not exceed that specified in DIN EN 13813 for the designated wear resistance class by more than 120 %, while the lowest single value shall not ex
37、ceed the specified value by more than 130 %. When the surface hardness of magnesite screed which will not receive flooring is determined, the mean shall be equal to at least 80 % of the value specified in DIN EN 13813 for the designated hardness class, while the lowest single value shall be equal to
38、 at least 70 % of the specified value. When testing the hardness of mastic asphalt screed, the indentation shall be equal to the value specified in DIN EN 13813 for the relevant hardness class. There has been no experience regarding the impact resistance (IR) of synthetic resin screed. A declared va
39、lue should perhaps be requested from the manufacturer. The bond strength of synthetic resin screed determined on a standard substrate as in DIN EN 13892-8 shall be equal to the value specified in DIN EN 13813 for at least class B 1,5. In confirmation testing, the bond strength of screed which will b
40、e subjected to traffic loads shall be equal to class B 1,5, although class B 1,0 is sufficient for screed which will not be subjected to traffic loads as long as failure occurs in the substrate. 5.2.2 Thickness Thickness need only be checked when necessary for strength or hardness testing. 5.2.3 Fle
41、xural strength 5.2.3.1 Test specimens For flexural strength testing, take at least three test pieces from the finished bonded screed which are to be large enough that at least two specimens having the following dimensions can be cut from them: thickness = screed nominal thickness, d; length = at lea
42、st 4 d; width = ca 40 mm. In the case of synthetic resin screed, test specimens shall comprise a thin screed layer of 1 cm and the substrate, with the total specimen thickness being 1 cm. Testing may be carried out in accordance with DIN EN ISO 178. 5.2.3.2 Procedure After levelling off the surfaces
43、 which are to be loaded and supported, condition the specimens in a DIN 50014-20/65-2 standard atmosphere until constant mass1)has been reached. Place the specimens on supports with the distance between supports being equal to about three times the screed thickness. With the upper side of the specim
44、en lying in the tension zone, apply a line load centrally between the supports. Increase the load so that the flexural stress in the specimen rises at a rate of about 0,1 N/(mm2 s) until failure. Determine flexural strength using equation (1). BZ= 251dblF,(1) 1) Constant mass is deemed to have been
45、reached when two subsequent weighings, 24 hours apart, produce results which differ by no more than 0,1 %. DIN 18560-3:2006-03 8 where BZis the flexural strength, in N/mm2; l is the distance between supports, in mm; b is the specimen width at the fracture face on the tension side, in mm; d is the me
46、an specimen thickness at the fracture face, in mm; F is the load at failure, in N. b and d are to be measured to the nearest 1 mm. Give the flexural strength to the nearest 0,1 N/mm2. 5.2.4 Compressive strength 5.2.4.1 Test specimens Compressive strength shall be tested on at least three core sample
47、s having a 50 mm diameter, or at least three test pieces from each of which a cube with an edge length equal to the screed thickness can be prepared. In the case of core samples, the surfaces which will be subjected to pressure are to be normal to the core axis and be ground until they are plane-par
48、allel or otherwise levelled. The specimen height, including any levelling layers, should be equal to the core diameter or edge length, to an accuracy of 10 %. After the surfaces have been levelled, condition the specimens in a DIN 50014-20/65-2 standard atmosphere until constant mass1)has been reach
49、ed. 5.2.4.2 Procedure Apply the load vertically, and increase it so that the compressive strength in the specimen rises at a rate of about 0,5 N/(mm2 s) until failure. Determine compressive strength using equation (2), where core samples have been used D= 24wdF(2) and equation (3) where cube specimens have been used D= 2wdF(3) where Dis the compressive strength, in N/mm2; F is the load at failure, in N; dbis the core diameter, in mm; dwis the cube edge length, in mm. dband dware to be measure
