SIST EN 13383-1:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Armourstone - Part 1: SpecificationKamen za obloge pri vodnih zgradbah in drugih gradbenih delih - 1. del: SpecifikacijaEnrochements - Partie 1 : SpécificationsWasserbausteine - Teil 1: Anforderungen91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:SIST EN 13383-1:2002enTa slovenski standard je istoveten z:EN 13383-1:200201-september-2002SIST EN 13383-1:2002SLOVENSKI
STANDARD







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13383-1May 2002ICS 91.100.15English versionArmourstone - Part 1: SpecificationEnrochements - Partie 1: SpécificationsWasserbausteine - Teil 1: AnforderungenThis European Standard was approved by CEN on 25 March 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13383-1:2002 E



EN 13383-1:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Geometrical requirements.55Physical requirements.126Chemical requirements.147Durability requirements.148Evaluation of conformity.179Designation and description.1810Marking and labelling.18Annex A (informative)
Limits of coarse, light and heavy gradings.19Annex B (informative)
Guidance on block integrity.20Annex C (informative)
Guidance on the resistance of armourstone to freezing and thawing and to saltcrystallization.21Annex D (normative)
Factory production control.24Annex E (informative)
Properties and information which comprise the description of armourstone.30Annex ZA (informative)
Clauses of this European Standard addressing the provisions of EUConstruction Products Directive.31Bibliography.38



EN 13383-1:2002 (E)3ForewordThis document EN 13383-1:2002 has been prepared by Technical Committee CEN/TC 154 "Aggregates", thesecretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latestby June 2004.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.This standard forms part of a series of standards for armourstone, the other part being:EN 13383-2Armourstone - Part 2: Test methods.Requirements for other end uses of aggregates will be specified in the following European Standards:prEN 12620Aggregates for concrete.prEN 13043Aggregates for bituminous mixtures and surface dressings for roads.EN 13055Lightweight aggregates.prEN 13139Aggregates for mortar.prEN 13242Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road
construction.prEN 13450Aggregates for railway ballast.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.



EN 13383-1:2002 (E)41
ScopeThis European Standard specifies the properties of aggregates obtained by processing natural, manufactured orrecycled materials and mixtures of these materials for use as armourstone.It provides for the evaluation of conformity of the products to this European Standard.NOTE 1The requirements in this European Standard are based upon experience with armourstone types with an establishedpattern of use. Care should be taken when considering the use of armourstone from sources with no such pattern of use, e.g.,recycled armourstone and armourstone arising from certain industrial by-products. Such armourstone, which should comply withall the requirements of this European Standard, could have other characteristics not included in Mandate M 125 that do notapply to the generality of armourstone types with an established pattern of use and when required, provisions valid at the placeof use can be used to assess their suitability.NOTE 2Finer aggregates than specified in this European Standard are used in hydraulic structures. For such aggregatesEuropean Standards for other end uses of aggregates should be applied.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 932-3, Tests for general properties of aggregate — Part 3: Procedure and terminology for simplifiedpetrographic description.EN 932-5, Tests for general properties of aggregate — Part 5: Common equipment and calibration.EN 933-3, Tests for geometrical properties of aggregates — Part 3: Determination of particle shape — Flakiness index.EN 1097-1, Tests for mechanical and physical properties of aggregates — Part 1: Determination of the resistanceto wear (micro-Deval).EN 1367-2, Tests for thermal and weathering properties of aggregates — Part 2: Magnesium sulfate test.EN 1744-1:1998, Tests for chemical properties of aggregates — Part 1: Chemical analysis.prEN 1744-3, Tests for chemical properties of aggregates — Part 3: Preparation of eluates by leachingof aggregates.EN 1926:1999, Methods of test for natural stones — Determination of compressive strength.EN 13383-2:2002, Armourstone — Part 2: Test methods.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1armourstonecoarse aggregates used in hydraulic structures and other civil engineering works



EN 13383-1:2002 (E)53.2natural armourstonearmourstone from mineral sources which has only been subjected to mechanical processing3.3manufactured armourstonearmourstone of mineral origin resulting from an industrial process involving thermal or other modification excludingconcrete armour units3.4recycled armourstonearmourstone resulting from the processing of inorganic material previously used in construction3.5armourstone gradingarmourstone designation with a nominal lower and upper limitNOTEThis designation accepts the presence of undersize and oversize pieces of armourstone.3.6nominal lower limitmass or sieve size in a grading below which the armourstone pieces are considered to be undersized3.7nominal upper limitmass or sieve size in a grading above which the armourstone pieces are considered to be oversized3.8coarse gradingdesignation of grading with a nominal upper limit defined by a sieve size between and including 125 mm and 250 mm3.9light gradingdesignation of grading with a nominal upper limit defined by a mass between and including 25 kg and 500 kg3.10heavy gradingdesignation of grading with a nominal upper limit defined by a mass of more than 500 kg3.11fragmentarmourstone piece in the finest fraction of coarse gradings or the lightest fraction of light and heavy gradings for whichthe particle size distribution or mass distribution requirements applyNOTEFor further information on grading, see annex A.3.12categorylevel of a property of armourstone expressed as a range of values or a limiting valueNOTEThere is no relationship between the categories of different properties.4 Geometrical requirements4.1 GeneralThe necessity for testing and declaring all properties in this clause is limited according to the particular application atend use or origin of the armourstone. When required, the tests specified in clause 4 shall be carried out to determineappropriate geometrical properties.



EN 13383-1:2002 (E)6NOTE 1When the value of a property is required but not defined by specified limits the value should be declared by theproducer as an XXDeclared category, e.g. in Table 7 the percentage by number of pieces of armourstone with less than 50 %crushed or broken surfaces of say 7 corresponds to RO7 (Declared value).NOTE 2When a property is not required, a “No requirement” category may be used.NOTE 3Guidance on selection of approriate categories for specific applications may be found in national provisions in theplace of use of the armourstone.Sampling shall be carried out as specified in EN 13383-2:2002, clause 4.4.2 Gradings4.2.1 Coarse gradingsThe particle size distribution of coarse gradings shall be determined in accordance with EN 13383-2:2002, clause 5and shall conform to:a) Table 1 for categories CP45/125, CP63/180, CP90/250, CP45/180, and CP90/180 ; orb) as declared by the producer for category CPDeclared.The mean distribution shall be obtained by calculating the arithmetic mean of the percentages passing eachspecified sieve.Table 1 — Requirements for the particle size distribution of standard coarse gradingsGradingmm45/12563/18090/25045/18090/180 aCategoryCP45/125CP63/180CP90/250CP45/180CP90/180 aSieve sizemmPercentage passing (by mass)360--98 to 100--250-98 to 10090 to 10098 to 10098 to 10018098 to 10090 to 100-90 to 10080 to 100 b12590 to 100-0 to 50--90-0 to 500 to 15-0 to 20 b630 to 500 to 15-0 to 50-450 to 15-0 to 5 c0 to 150 to 5 c31,5-0 to 5 c---22,40 to 5 c-0 to 5 c-a Grading 90/180 mm is a narrow grading designated for special applications such as gabions.b The fraction between the 90 mm and 180 mm sieves of the 90/180 mm grading shall be
80 % by mass.c Fragments.4.2.2 Light gradingsThe mass distribution of light gradings shall be determined in accordance with EN 13383-2:2002, clause 6.The mass distribution of a bulk sample consisting of three samples from a stream of material or six samples from astatic batch shall conform to:



EN 13383-1:2002 (E)7a) Table 2 for categories LMA5/40, LMA10/60, LMA40/200, LMA60/300 and LMA15/300; orb) Table 3 for categories LMB5/40, LMB10/60, LMB40/200, LMB60/300 and LMB15/300; orc) the mass distribution and, where appropriate, the average mass as declared by the producer for categoryLMDeclared.Table 2 — Requirements for average mass (excluding fragments) andmass distribution of category A standard light gradingsGradingkg5 to 4010 to 6040 to 20060 to 30015 to 300CategoryLMA5/40LMA10/60LMA40/200LMA60/300LMA15/300Average masskg10 to 2020 to 3580 to 120120 to 19045 to 135MasskgPercentage (by mass) less than particle mass450---97 to 10097 to 100300--97 to 10070 to 10070 to 100200--70 to 100--120-97 to 100---8097 to 100----60-70 to 100-0 to 10-4070 to 100-0 to 10--30---0 to 2 a-15--0 to 2 a-0 to 1010-0 to 10---50 to 10----3----0 to 2 a2-0 to 2 a---1,50 to 2 a----a Fragments.



EN 13383-1:2002 (E)8Table 3 — Requirements for mass distribution of category B standard light gradingsGradingkg5 to 4010 to 6040 to 20060 to 30015 to 300CategoryLMB5/40LMB10/60LMB40/200LMB60/300LMB15/300MasskgPercentage (by mass) less than particle mass450---97 to 10097 to 100300--97 to 10070 to 10070 to 100200--70 to 100--120-97 to 100---8097 to 100----60-70 to 100-0 to 10-4070 to 100-0 to 10--30---0 to 2 a-15--0 to 2 a-0 to 1010-0 to 10---50 to 10----3----0 to 2 a2-0 to 2 a---1,50 to 2 a----a Fragments.4.2.3 Heavy gradingsThe mass distribution of heavy gradings shall be determined in accordance with EN 13383-2:2002, clause 6.The mass distribution of a bulk sample consisting of three samples from a stream of material or six samples from astatic batch shall conform to:a) Table 4 for categories HMA300/1000, HMA1000/3000, HMA3000/6000, HMA6000/10000, and HMA10000/15000; orb) Table 5 for categories HMB300/1000, HMB1000/3000, HMB3000/6000, HMB6000/10000, and HMB10000/15000; orc) the mass distribution and, where appropriate, the average mass as declared by the producer for categoryHMDeclared.



EN 13383-1:2002 (E)9Table 4 — Requirements for average mass (excluding fragments)and mass distribution of category A standard heavy gradingsGradingkg300 to 1 0001 000 to 3 0003 000 to 6 0006 000 to 10 00010 000 to 15 000CategoryHMA300/1000HMA1000/3000HMA3000/6000HMA6000/10000HMA10000/15000Average masskg540 to 6901 700 to 2 1004 200 to 4 8007 500 to 8 50012 000 to 13 000MasskgPercentage (by mass) less than particle mass22 500----97 to 10015 000---97 to 10070 to 10010 000---70 to 1000 to 109 000--97 to 100--6 500----0 to 5 a6 000--70 to 1000 to 10-4 500-97 to 100---4 000---0 to 5 a-3 000-70 to 1000 to 10--2 000--0 to 5 a--1 50097 to 100----1 00070 to 1000 to 10---650-0 to 5---3000 to 10----2000 to 5 a---a Fragments.



EN 13383-1:2002 (E)10Table 5 — Requirements for mass distribution of category B standard heavy gradingsGradingkg300 to 1 0001 000 to 3 0003 000 to 6 0006 000 to 10 00010 000 to 15 000CategoryHMB300/1000HMB1000/3000HMB3000/6000HMB6000/10000HMB10000/15000MasskgPercentage (by mass) less than particle mass22 500----97 to 10015 000---97 to 10070 to 10010 000---70 to 1000 to 109 000--97 to 100--6 500----0 to 5 a6 000--70 to 1000 to 10-4 500-97 to 100---4 000---0 to 5 a-3 000-70 to 1000 to 10--2 000--0 to 5 a--1 50097 to 100----1 00070 to 1000 to 10---650-0 to 5---3000 to 10----2000 to 5 a---a Fragments.4.3 Shape4.3.1 Length-to-thickness ratioThe percentage of pieces of armourstone with a length to thickness ratio greater than 3 shall be determined inaccordance with EN 13383-2:2002, clause 7.4.3.2 Coarse gradingsThe percentage of pieces of armourstone with a length to thickness ratio greater than 3 of a subsample, obtainedfrom the samples specified for the determination of particle size distribution (see 4.2.1) shall conform to the relevantrequirements (or the producer's declaration for category LTDeclared) specified in Table 6 for the selected category,when tested as specified in 4.3.1.4.3.3 Light gradingsThe percentage of pieces of armourstone with a length to thickness ratio greater than 3 of a bulk sample asspecified for the determination of the mass distribution (see 4.2) shall conform to the relevant requirements (or theproducer's declaration for category LTDeclared) specified in Table 6 for the selected category, when tested asspecified in 4.3.1.



EN 13383-1:2002 (E)114.3.4 Heavy gradingsThe percentage of pieces of armourstone with a length to thickness ratio greater than 3 of a bulk sample asspecified for the determination of the mass distribution (see 4.2.3) shall conform to the relevant requirements (orthe producer's declaration for category LTDeclared) specified in Table 6 for the selected category, when tested asspecified in 4.3.1.Table 6 — Category for shapeLength to thickness ratio greater than 3Percentage by massPercentage by numberCoarse gradingsLight gradingsHeavy gradingsCategoryLT 20 20 5LTAOther value declaredby the producerOther value declaredby the producerOther value declared bythe producer
LTDeclaredNo requirementNo requirementNo requirementLTNR4.4 Proportion of crushed or broken surfacesWhen required, the proportion of pieces of armourstone (excluding fragments), with less than 50 % crushed orbroken surfaces (rounded pieces) shall conform to the relevant requirement (or the producer's declaration forcategory RODeclared) specified in Table 7 for the selected category. The sample tested shall be the sample used forthe determination of shape, see 4.3. The sample shall be examined by visual inspection and counting of pieces ofarmourstone.Table 7 — Categories for crushed or broken surfacesPieces of armourstone with less than50 % crushed or broken surfacesPercentage by numberCategoryRO 5Other value declared by the producerRO5
RODeclaredNo requirementRONRNOTE 1
Broken surfaces are understood to include surfaces arising fromdiscontinuities in the rock formation such as bedding planes and joints.NOTE 2
Category RO5 should only be applied to armourstone for use in structuresin which rounded pieces of armourstone could lead to instability.



EN 13383-1:2002 (E)125 Physical requirements5.1 GeneralThe necessity for testing and declaring all properties in this clause is limited according to the particular applicationorigin of the armourstone. When required, the tests specified in clause 5 shall be carried out to determine appropriatephysical properties.NOTE 1When the value of a property is required but not defined by specified limits the value should be declared by theproducer as an XXDeclared category, e.g. in Table 10 a value of say a micro-Deval coefficient of 40 corresponds to MDE40 (Declaredvalue).NOTE 2When a property is not required, a “No requirement” category may be used.NOTE 3Guidance on selection of approriate categories for specific applications may be found in national provisions in theplace of use of the armourstone.Sampling shall be carried out as specified in EN 13383-2:2002, clause 4.5.2 Particle densityThe particle density of armourstone (excluding fragments), shall be determined in accordance withEN 13383-2:2002, clause 8 and the results declared.The number of pieces of armourstone to be tested and the test results shall conform to Table 8.Table 8 — Density requirementsAverage density of 10 pieces> x Mg/m3Density of at least 36 pieces of 40 pieces tested> x - 0,10 Mg/m3The value for x shall be declared by the producer and stated to 2 decimal places and shall notbe less than 2,30.If each of the first 10 pieces of armourstone tested meets the requirement for average density, no further testing isrequired.5.3 Resistance to breakageThe resistance to breakage of armourstone (excluding fragments) shall be determined by testing compressivestrength in accordance with EN 1926:1999, annex A.Each specimen shall be prepared from a separate piece of armourstone.The number of specimens to be tested and the test results shall conform to the relevant requirements (or theproducer's declaration for category CSDeclared) specified in Table 9 for the selected category.



EN 13383-1:2002 (E)13Table 9 — Categories of resistance to breakage requirementsMean compressive strength of 9specimens after striking out thelowest value from 10 specimensMPaCompressive strength of no morethan 2 specimens out of 10MPaCategoryCS 80 60Other value declared by the producer< 60< 40Other value declared by the producerCS80CS60
CSDeclaredNo requirementNo requirementCSNRNOTEBlock integrity is also of particular importance. Armourstone should be free from significant discontinuities such ascracks, veins, stylolite seams, laminations, foliation planes, cleavage planes, unit contacts or other such flaws which could leadto breakage during loading, unloading or placing.
Guidance on block integrity is given in annex B.5.4 Resistance to wearWhen required, the resistance to wear of armourstone (excluding fragments), determined in accordance withEN 1097-1:1996, clause 7, shall conform to the relevant requirement (or the producer's declaration for categoryMDEDeclared) specified in Table 10 for the selected category.Table 10 — Categories for resistance to wear requirementsmicro-Deval coefficientCategoryMDE102030Other value declared by the producerMDE10MDE20MDE30
MDEDeclaredNo requirementMDENRNOTE
These requirements apply to top layers of armourstone which are known to besubject to attrition by sediment.
Suggested use of categories is as follows:Category MDE10: Very highly abrasive environment, e.g. frequently stormy seas with shinglestructure interaction, fluvial torrents, dynamic armour design concept.Category MDE20: Highly abrasive environment, e.g. occasionally stormy seas with shingle orsandy foreshore;Category MDE30: Moderately abrasive environment, e.g. occasional significant wave orcurrent action of suspended sediment load.The test portion shall be prepared in accordance with EN 1097-1:1996, clause 6.
Where suitable aggregaterepresentative of the armourstone is not available, the test portion shall be prepared in accordance withEN 1097-1:1996, clause 6, with the following variations specified in 5.4.1, 5.4.2 and 5.4.3.



EN 13383-1:2002 (E)145.4.1The test portion shall be obtained by crushing at least six separate pieces of armourstone for which themasses do not differ by more than 25 %. The crushing shall be carried out with a laboratory jaw crusher.5.4.2Flaky particles shall be removed by using bar sieves conforming to EN 933-3 as follows:a) bar sieve of 6,3 mm for the fractions 10 mm to 11,2 mm (or 10 mm to 12,5 mm);b) bar sieve of 8 mm for the fractions 11,2 mm to 14 mm (or 12,5 mm to 14 mm).5.4.3Cubical particles shall be removed by using bar sieves conforming to EN 933-3, as retained particles onthe 12,5 mm bar sieve for the fractions 11,2 to 14 mm (or 12,5 mm to 14 mm).5.5 Requirement associated with groutingArmourstone intended for use in a layer to be grouted with bituminous or cement mortar shall not be covered withobservable clayey or other adhesive soil.5.6 ColourNatural variation in colour supplied from a quarry (or distinct part of a quarry) with an established pattern of supplyshall not be grounds for rejection of any material.NOTEThe purchaser should advise the supplier of any preference for a particular general colour for the armourstone.6 Chemical requirements6.1 GeneralWhen required, the tests specified in clause 6 shall be carried out to determine appropriate chemical properties.NOTEThis clause generally applies to natural and manufactured armourstone.
However, some recycled materials couldhave other chemical characteristics not included in Mandate M 125 that do not apply to the generality of armourstone with anestablished pattern of use and when required, provisions valid at the place of use can be used to assess its suitability.Sampling shall be carried out as specified in EN 13383-2:2002, clause 4.6.2 ImpuritiesArmourstone shall not contain any foreign matter in a quantity that will cause damage to the structure or theenvironment in which it is used (see Table D.2).6.3 Water soluble constituentsWhen a determination of water soluble constituents is required, an eluate shall be prepared as specified inprEN 1744-3.7 Durability requirements7.1 GeneralThe necessity for testing for all properties in this clause is limited according to the particular application at end use ororigin of the armourstone.
When required, the tests specified in clause 7 shall be carried out to determine appropriatedurability properties.NOTE 1When the value of a property is required but not defined by specified limits the value should be declared by theproducer as an XXDeclared category, e.g. in Table 14 a value of a percentage loss of mass of 30 corresponds to MS30 (Declared value).NOTE 2When a property is not required, a “No requirement” category may be used.



EN 13383-1:2002 (E)15NOTE 3Guidance on selection of approriate categories for specific applications may be found in national provisions in theplace of use of the armourstone.Sampling shall be carried out as specified in EN 13383-2:2002, clause 4.7.2 Constituents which affect the durability of blastfurnace and steel slags7.2.1 Dicalcium silicate disintegration of air-cooled blastfurnace slagWhen required, air-cooled blast-furnace slag armourstone (excluding fragments) tested in accordance withEN 1744-1:1998, 19.1, shall be free from dicalcium silicate disintegration.7.2.2 Iron disintegration of air-cooled blastfurnace slagWhen required, air-cooled blastfurnace slag armourstone (excluding fragments) tested in accordance withEN 1744-1:1998, 19.2, shall be free from iron disintegration.7.2.3 Disintegration of steel slagWhen required, the disintegration of steel slag armourstone shall be tested in accordance withEN 13383-2:2002, clause 10.The sample for testing shall consist of 20 pieces of slag (excluding fragments).The disintegration of steel slags shall conform to the relevant requirements (or the producer's declaration forcategory DSDeclared) specified in Table 11 for the selected category.Table 11 — Categories for disintegration of steel slagDisintegration of steel slagLoss of mass or formation of cracksCategoryDSMaximum four pieces show > 0,5 % loss of mass and maximum onepiece shows > 20 % loss of mass or cracksDSATotal loss of mass of all pieces
0,5 % and maximum one pieceshows > 20 % loss of mass or cracksDSBOther values declared by the producer
DSDeclaredNo requirementDSNRFor categories DSA and DSB of Table 11, if one of the 20 pieces shows either cracks or more than 20 % loss ofmass, another 20 pieces of steel slag shall be tested. None of these additional pieces shall show either cracks ormore than 20 % loss of mass.7.3 Water absorption as a screening test for resistance to freezing and thawing and to salt crystallizationWhen required, the water absorption of armourstone (excluding fragments) shall be determined in accordance withEN 13383-2:2002, clause 8.If the water absorption is not greater than the value selected as category WA0,5 specified in Table 12, thearmourstone shall be assumed to be resistant to freezing and thawing and to salt crystallization. 10 Pieces ofarmourstone shall be tested.



EN 13383-1:2002 (E)16Table 12 — Categories for water absorptionWater absorptionPercentage by massCategoryWAAverage absorption
0,5WA0,57.4 Resistance to freezing and thawingWhen required, the resistance to freezing and thawing of armourstone (excluding fragments) shall be determined inaccordance with EN 13383-2:2002, clause 9. The resistance to freezing and thawing shall conform to the relevantrequirements (or the producer's declaration for category FTDeclared) specified in Table 13 for the selected category.10 Pieces of armourstone shall be tested initially.If one of the tested pieces shows more than 0,5 % loss of mass or formation of open cracks, another 10 pieces ofarmourstone shall be tested.NOTE 1The pieces tested in conformity with clause 7.2 and showing maximum 0,5 % water absorption are excluded fromfurther testing.NOTE 2Guidance on how to specify the resistance of armourstone to freezing and thawing is given in annex C.Table 13 — Categories for resistance to freezing and thawingFreezing and thawingLoss of mass or formation of open cracksCategoryFTMaximum of one of the initially tested piecesand none of the additionally tested piecesshows more than 0,5 % loss of mass orformation of open cracks.FTAOther value declared by the producer
FTDeclaredNo requirementFTNR7.5 Resistance to salt crystallizationWhen required, the resistance to salt crystallization of armourstone (excluding fragments) shall be determined inaccordance with EN 1367-2:1998, clause 8. The resistance to salt crystallization shall conform to the relevantrequirement (or the producer's declaration for category MSDeclared) specified in Table 14 for
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