shall not exceed 8 not exceed 10.
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1 Table 3602/1 CRUSHED STONE BASE AND SUBBASE: MATERIAL REQUIREMENTS Material TYPE OF MATERIAL Characteristic G1 G2 G3 Parent Sound rock from an approved Sound rock, boulders Sound rock, boulders or Material quarry, or clean, sound mine or coarse gravel coarse gravel rock from mine dumps, or clean sound boulders Only fines crushed from the May contain UP to May contain UP to 15% by same sound parent rock may be 10% by mass of mass of approved natural fines ADDITIONAL added for grading correction approved natural fines not obtained from parent rock. FINES provided that added fines shall not necessarily Added fines shall have a LL. not have a LL. Not exceeding 25 and obtained from parent exceeding 25 and a PI not PI not exceeding 4 rock. Added fines exceeding 6. fines shall have a LL. not exceeding 25 and PI not exceeding 6 STRENGTH 10% Fines Aggregate Crushing Value (10% fact), determined in accordance with TMH1 method B2, shall be not less than the appropriate value in table 3602/2, column 3. The Aggregate crushed value(acv), determined in accordance with TMH1 method B1, shall not exceed the appropriate value in the 3602/3. DURABILITY The material shall comply with the requirements in columns 3,4 and 5 of table 3602/2. FLAKINESS INDEX Flakiness Index, determined in accordance with TMH1 method B3, shall not exceed 35 on each of the -26,5 + 19mm fraction and the ,2mm fraction. FRACTURED All faces shall be fractured faces For crushed materials at least 50% by mass of the FACES fractions retained on each standard sieve 4.75mm and larger shall have at least one fractured face Fraction LL. Shall not exceed 25. LL.shall not exc.25 LL. Shall not exceed 25 (mm) PI shall not exceed 5 PI shall not exc.6 PI shall not exceed 6 LS shall not exceed 2% In addition the LS shall not exceed 3% Atterberg -0,425 In addition the arithmetic mean arithmetic mean of In the case of calcrete the PI Limits of the PI's for a lot (min 6 tests) the PI's for a lot (min shall not exceed 8 shall not exceed 4. 6 tests) shall not (% passing 0.425mm sieve) exceed 4,5. LS LS shall not exc.3%. -0,075 The PI shall not exceed 12. If the PI exceeds 12 the If chemical modification is material shall be chemically modified. After chemical required, the PI of the -0,075mm modification the PI of the minus 0.075mm fraction fraction after modification shall shall not exceed 8 not exceed 10. See additional requirements NOMINAL MAXIMUM 37,5mm 37,5mm 37,5mm 26,5mm SIZE Nominal Percentage passing sieve, by Percentage passing Percentage passing sieve, aperture mass sieve, by mass by mass size of sieve(mm) 37, , GRADING 19, , , , , , COARSE SAND Shall not be less than 35% and Shall not be less than Shall not be less than 35% and
2 RATIO (see definition shall not exceed 50% in respect 35% and shall not shall not exceed 50% in respect in SUBSUBCLAUSE of the target grading exceed 50% in of the target grading. 3602(c)(i)(5)) respect of the target grading COMPACTION Minimum of 88% of apparent Minimum of 85% of 98% or 100% of modified REQUIREMENTS relative density. bulk relative density. AASHTO density (as specified) TABLE 3402/1 REQUIREMENTS FOR TYPES G4 TO G6 MATERIALS TYPES OF MATERIAL PROPERTY G4 G5 G6 Natural gravel, or natural gravel Natural gravel, or Natural gravel, or natural gravel DESCRIPTION OF and boulders which may natural gravel and and boulders which may MATERIAL require crushing boulders which may require crushing, or crushed require crushing, or rock. crushed rock May contain approved additional May contain approved May contain approved natural ADDITIONAL FINES fines not obtained from parent natural fines not fines not obtained from parent rock. Added fines shall have a obtained from parent rock. liquid limit (LL.) not exceeding rock. 25 and a plasticity(pi) not NOMINAL MAXIMUM (i) Uncrushed material:53mm (i) Uncrushed (i) Uncrushed material: SIZE material: 63mm (ii) Crushed material:37,5mm or Two thirds of the compacted (unless otherwise specified (ii) Crushed material: layer thickness(unless otherwise in the project specifications) 53mm before specified in the the project compaction(unless specifications) otherwise specified in the project (ii) Crushed material: specifications) 63mm before compaction (unless otherwise specified in the project specifications) FLAKINESS INDEX Flakiness index, determined in accordance with the TMH1 method B3, shall not exceed 35 on each of the -26,5 + 19mm fraction and the ,2mm fraction. FRACTURED Alluvial and colluvial gravels shall Alluvial and colluvial FACES be crushed so that at least 50% gravels shall be by mass of the fractions retained crushed so that at on each standard sieve 4,75mm least 50% but. Mass and any larger shall have at least of the fractions one fractured face. retained on each standard sieve 4,75m and any larger shall have at least one fractured face. GRADING Percentage passing through sieve by mass Nominal Crushed material aperture Nominal Nominal Uncrushed size of maximum maximum material sieve(mm) size size The percentage by 37,5mm 26,5 mm mass passing the 53, ,00mm sieve shall
3 37, not be less than 20% 26, or môre than 70%. 19, , , , , , GRADING MODULE 2.5smaller & equal 2.6 smaller & equal GM smaller (GM) GM smaller &equal1.5 & equal 1.2 (a) All materials except (a) All materials PI shall not exceed 12 or a calcrete: except calcrete: value equal to 2 times the GM LL. Shall not exceed plus 10, whichever is the higher ATTERBERG LIMITS LL. Shall not exceed 25 30, value.ls shall not exceed 5%. FOR NATURAL PI shall not exceed 6 PI shall not not In the case of calcrete the PI MATERIAL (-0,425 LS shall not exceed 3%. exceed 10. shall not exceed 15 provided the FRACTION) LS shall not exceed LS does not exceed 6% and (b) Calcrete: 5%. (% passing 0,425mm sieve) LS greater than 320. LL. Greater than 25 (b) Calcrete: PI greater than 8 LL. greater than 30 (%) passing 0,425mm sieve PI greater than 15 LS greater than 170 LS greater than 6 (% passing 0,425mm sieve) LS greater 320 The material shall comply with Mudrock shall have Mudrock shall have a wet 10% DURABILITY the requirements in table 3402/3 a wet 10% FACT FACT value of not less than value of not less than 80kN, and a wet/dry Venter test 90kN,and a wet/dry class of I or II. Venter test class of I or II The materials shall comply with the requirements of clause CBR at 98% of modified CBR AT 95% of CBR at 95% of modified STRENGTH (CBR) AASHTO density shall not be modified AASHTO AASHTO density shall not be less than 80% density shall not be less than 25%. less than 45% SWELL (Maximum) Swell at 100% of modified Swell at 100% of Swell at 100% of modified AASHTO density shall not modified AASHTO AASHTO density shall not exceed 0,2% for all materials density shall not exceed 1,0%. except calcrete for which the exceed 0,5%. swell shall not exceed 0,5%. COMPACTION 98% or 100% (as specified) of The density requirements of the layer in which the REQUIREMENTS modified AASHTO density for material is used, shall be applicable.(see subclause natural materials. 3402(b).) In restricted areas the in situ dry density of gravel material shall comply with the requirements in the project specifications. REQUIREMENTS FOR TYPES G7 TO G9 MATERIALS TYPE OF MATERIAL PROPERTY G7 G8 G9 DESCRIPTION OF Natural material (soil, sand or Natural material Natural material (soil, sand or MATERIAL gravel) (soil, sand or gravel) gravel) ADDITIONAL FINES Not applicable Not applicable Not applicable NOMINAL MAXIMUM (i) Uncrushed material: two Two thirds of the Two thirds of the compacted SIZE thirds of the compacted compacted layer layer thickness. layer thickness. thickness. (ii) Uncrushed material:75mm
4 GRADING MODULUS (GM) 2.7 smaller equal GM smaller equal smaller equal GM smaller equal 0.75 ATTERBERG LIMITS The PI shall not exceed 12 or a The PI shall not The PI shall not exceed 12 or a FOR NATURAL value equal to 3 times the GM exceed 12 or a value value equal to 3 times the GM MATERIAL(0,425mm plus 10, whichever is the higher equal to 3 times the plus 10, whichever is the higher FRACTION) value. GM plus 10, which- value. In the case of the calcrete the PI ever is the higher In the case of the calcrete the PI shall not exceed 17 provided value. shall not exceed 17 provided that the LS does not exceed 7% In the case of that the LS does not exceed 7% and calcrete the PI shall (% passing0,425mm sieve) not exceed 17 LS greater than 320. provided that the LS does not exceed 7% DURABILITY Mudrock shall have a wet 10% Mudrock shall have a Mudrock shall have a wet 10% FACT value of not less than wet FACT value of FACT value of not less than 60kN, and a wet.dry Venter test not less than 60kN, 60kN, and a wet.dry Venter test class of I, II or III. and a wet/dry Venter class of I, II or III. test class of I, II or III. The materials shall comply with the requirements of clause STRENGTH (CBR) CBR at 93% of modified CBR at 93% of CBR at 93% of modified AASHTO density shall be at modified AASHTO AASHTO density shall be at least 15% density shall be at least 7% least 10% SWELL Swell at 100% of modified Swell of 100% of Swell at 100% of modified (MAXIMUM) AASHTO density shall not modified AASHTO AASHTO density shall not exceed 1,5% density shall not exceed 1,5% exceed 1,5% COMPACTION The density requirements of the layer in which the material is used, shall be applicable. REQUIREMENTS (See subclause 3402(b).) In restricted areas the in situ dry density of gravel material shall comply with the requirements in the project specifications. Table 3402 / 3 DURABILITY REQUIREMENTS FOR G4 MATERIAL GROUP MEMBERS OF THE GROUP DURABILITY MILL %PASSING 0,425mm SIEVE INDEX (MAXIMUM) AFTER THE DURABILITY MILL TEST (MAXIMUM) Basic crystalline rock Basalt Dolerite Gabbro Gneiss Granite High silica rock Chert Hornfels (clay mineral kaolin) Quartzite Sandstone Arkose Conglomerate (increase from original not môre Sandstone than 15%) Mudrock Siltstone Mudrock Phylite Shale etc. Carbonater rock Dolomite not applicable not applicable Limestone Marble Greywacke Tillite
5 Pedogenic material Table 3402/4 Maximum size, mm Calcrete Ferricrete Silcrete REQUIREMENTS FOR GRAVEL WEARING COURSE PARAMETER LIMIT TYPE 1 TYPE 2 37,5 37,5 Oversize Index (Io) (maximum), % Greater and equal to 5 0 Shrinkage product (Sp) (maximum of 240 preferable) Grading coefficient (Gc) CBR at smaller & equal to 95% modified AASHTO Compaction(soaked value) (minimum), % Io = Oversize Index (per cent retained on 37,5 mm sieve) smaller and equal to 15 smaller and equal to 15 Sp = Linear shrinkage x (per cent passing 0,425mm sieve) Gc = (Per cent passing 26,5mm - per cent passing 2,0mm) x per cent passing 4,75 mm /100 Note: All the parameters in table 3402/4 are defined in TRH 20 Table 3402/5 REQUIREMENTS FOR CHEMICALLY STABILIZED PAVEMENT LAYERS CRITERIA C1 C2 C3 C4 Material before treatment Atterberg limits after treatment Design strength (Mpa) (Laboratory unconfined strength) At least G2 quality Slightly plastic At least G4 quality Slightly plastic At least G6 quality PI shall not exceed 6 (a) at 100% of modified minimum : 6 minimum : 3 minimum:1,5 minimum: 0,75 AASHTO density maximum : 12 maximum : 6 maximum:3 maximum: 1,5 (b) at 97% of modified minimum : 4 minimum : 2 minimum:1 minimum: 0,5 AASHTO density maximum : 6 maximum : 4 maximum:2 maximum: 1 Indirect tensile strength at 100% Minimum:250 Minimum :200 modified AASHTO density(kpa) Durability: Fines lost All characteristics, including amongst others the carbonated values with regard Wet - dry to durability, shall comply with the requirements in the project specifications. Freeze - thaw
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