ASTM D52-62 (1981) Specification for Wood Paving Blocks for Exposed Platforms, Pavements, Driveways, and Interior Floors Exposed to Wet and Dry Conditions

Trang 1 • Designation: D 52 - 62 Reapproved 1981 Standard Specification for WOOD PAVING BLOCKS FOR EXPOSED PLATFORMS, PAVEMENTS, DRIVEWAYS, AND INTERIOR FLOORS EXPOSED TO WET AND DRY CON

• Designation: D 52 - 62 (Reapproved 1981)

Standard Specification for

WOOD PAVING BLOCKS FOR EXPOSED PLATFORMS, PAVEMENTS, DRIVEWAYS, AND INTERIOR FLOORS

This standard is issued under the fixed designation D 52: the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision A number in parentheses indicates the year of last reapproval

A superscript epsilon(<) indicates an editorial change since the last revision or reapproval

l Scope

1.1 This specification covers creosoted end

grain wood paving blocks for exposed

plat-forms, pavements, and other areas exposed to

alternately wet and dry conditions The

speci-fication is divided into two parts, one covering

material and the other a recommended practice

for installation

PART I-MATERIAL

2 Species of Timber

2.1 The wood, which shall be treated, shall

be southern pine, Douglas fir, oak, gum, or

other species mutually agreed upon by the

pur-chaser and the seller Only one kind of wood

shall be used in any one contract

J Quality of Timber

3.1 The blocks shall be sound and well

man-ufactured, square butted and square edged, and

shall be free from unsound loose or hollow

knots, knot holes, and other defects such as

shakes, checks, etc., that would be detrimental

to the blocks

3.2 Blocks manufactured of southern pine or

Douglas frr shall average not less than four

atmU'al rin~ per inch measured O\f.Cf the third,

fourth, and fifth inches from the pith In blocks

not containing the pith, measurement shall be

made on a 3-in (76-mm) radial line over a

portion of the cross section that is

representa- tive of the average growthrepresenta- No block shall have

less than three rings per inch measured as

above, and not more than 5 percent of the

pieces in any lot may have three rings per inch

4 Size of Blocks

4.1 The blocks shall be from 5 to 8 in ( 127

to 203.2 mm) in length, but the length shall not exceed three times the depth; they shall be 2 to

4 in (50 to 101.6 mm) in depth parallel to grain They may be 2Y2 to 4 in (63 to 101.6 mm) in width, but on any one area all shall be

of uniform width Permissible variations from the specified dimensions shall not exceed VIs in (I mm) in depth and Ys in (3 mm) in width In all cases the width shall be greater or less than the depth by at least \-4 in (6 mm)

5 Preservative 5.1 The preservative used shall be either creosote furnished in accordance with ASTM Specification D 390, Coal-Tar Creosote for the Preservative Treatment of Piles, Poles, and Timbers for Marine, Land and Fresh Water Use,2 or creosote coal-tar solution furnished in accordance with ASTM Specification D 391, Creosote-Coal Tar Solution 2

6 Preservative Treatment 6.1 The timber may be green or partially air-seasoned with moisture co~ent not less than 30 percent and treated with not less than 10 Ib of creosote oil per cubic foot of timber by a stand-ard pressure process, with thorough diffusion throughout the sapwood

1 This specification is under the jurisdiction of ASTM Com-mittee 0-7 on Wood

Current edition effective Sept 28 1962 Originally issued

1918 Replaces D 52-59 T

2 Annual Book of ASTM Standards Vol 04.09

7 Retention of Preservative

7.1 The net retention in any charge shall be

not less than 90 percent of the quantity of

preservative that may be specified The average

retention by the wood blocks treated under any

contract or order of five charges or more, and

the average retention of any five consecutive

charges shall be not less than 100 percent of the

quantity specified, except when the character

of the wood in any charge makes these

requiments impracticable, despite treatment to

re-fusal In the latter case, allowance shall be

made for the difference between the quantities

of preservative specified and retained When

the contract or order comprises less than five

charges, the average retention shall be not less

than 95 percent of the quantity specified The

amount of preservative retained shall be

cal-culated from readings of working-tank gages or

scales, or from weights before and after

treat-ment of loaded trams on suitable track scales

with the necessary corrections for changes in

moisture content

7.2 The amount of preservative retained by

~e blocks shall be as stipulated in purchase

t_order and in no case shall be less than 10 lb/ft3

'of wood in the charge

7.3 The volume of preservative shall be

cal-l culated on the basis of a temperature of 100 F

Calculations of volume or weight shall be made

by the use of temperature or specific gravity

! factors contained in ASTM D 347, Volume and

· Specific Gravity Correction Tables for

Creo-sote and Coal Tar.2

8 Penetration of Preservative

8.1 The blocks after treatment shall show

satisfactory penetration of the preservative, and

in all cases the oil shall be distributed

through-out the sapwood To determine this, at least 25

blocks shall be selected from various parts of

each charge and sawed in half perpendicular to

the fibers through the center, and if more than

one of these blocks show untreated sapwood,

! the charge shall be retreated After retreating,

the charge shall be again subjected to a similar

inspection and rejected if all blocks do not

show complete sapwood penetration

~· Inspection at Plant

9.1 All material prescribed in this

specifica-tion and processes used in the manufacture of

052

the blocks therefrom shall be subject to inspec-tion, acceptance, or rejection at the plant of the manufacturer, which shall be equipped with all the necessary gages, appliances, and facilities

to enable the inspector to satisfy himself that the requirements of the specification are being fulfilled

PART II-RECOMMENDED PRACTICE FOR

INSTALLATION

10 Foundation 10.1 The concrete foundation shall be fin-ished to a smooth even surface, exactly the depth below the fmished level corresponding to the depth of the block to be used and with sufficient crown to quickly drain off all water from the surface Care must be taken to see that there are no projections or waves in the concrete that will form an uneven bearing for the blocks

11 Bituminous Paint Coat ll.l On the thoroughly cleaned and dried concrete base shall be spread a thin uniform coat of hot coal-tar pitch conforming to the requirements specified in Table l It shall be heated to a temperature of not less than 250 F, (121 C) and not more than 300 F, (149 C) and squeegeed or sprayed over the concrete while hot in a thin, uniform coating Y1B to Ys in ( l to

3 mm) in thickness

12 Laying Blocks 12.1 The blocks shall be laid on the hardened bituminous paint coat with the grain

of the wood vertical, in straight parallel lines without ramming, leaving enough space be-tween the blocks to afford expansion All joints shall be broken by a lap of at least 1 in (25 mm) No less than half blocks shall be used except for closures

12.2 Against walls, curbs, or other obstruc-tions, a bituminous expansion joint at least I

in (25 mm) in width shall be installed It may

be either a premoulded or a poured joint, using the same bitumen used as a filler

12.3 After the floor has been cut in, two coats of bituminous binder shall be applied at the highest possible temperature without burn-ing or injurburn-ing its consistency, by the use of a squeegee machine Care must be exercised to work the binder into the joints uniformly and

in such a manner as to leave a minimum of this

binder on the surface The light film of bitumen

on the surface will wear off readily under

traffic

13 Methods of Sampling and Testing

13.1 The coat-tar pitch shall be sampled and

the properties as enumerated in this

specifica-tion shall be determined in accordance with the

following methods:

13.1.1 Sampling-ASTM Methods D 140,

Sampling Bituminous Materials 3

13.1.2 Specific Gravity ASTM Method

D 70, Test for Specific Gravity of Semi-Solid

052

Bituminous Materials 3 13.1.3 Softening Point-ASTM Method

D 61, Test for Softening Point of Pitches (Cube-in-Water Method).4

13.1.4 Bitumen Soluble in Carbon

Disuljide-ASTM Method D 4, Test for Bitumen.4

13.1.5 Distillation-ASTM Method D 20, Test for Distillation of Road Tars.3

13.1.6 Specific Gravity of Distillate-ASTM

Method D 369, Test for Specific Gravity of Creo-sote Fractions and Residues.2

3 Annual Book of ASTM Standards, Vol 04.03

4 Annual Book of ASTM Standards, Vol 04.04

TABLE 1 Requirements for Coal-Tar Pitch

(Homogeneous)

Specific gravity, 25/25 C (77 /77 F) Softening point (cube-in-water method)

Total bitumen soluble in carbon di-sulfide, percent

Distillation:

total distillate by weight, 32 to

572 F (0 to 300 C), percent Specific gravity, 100/60 F (38/

15.5 C) of total distillate to 572 F (300 C)

Min Max 1.22

135 F

(57 C)

72

1.03

1.34

155 F

(68C)

85

10

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