tmh-6 -st4.pdf

METHODST4

THE BALL PENETRATION TEST FOR SURFACE TREATMENT DESIGN

1 SCOPE This method describes a test tor measuring the penetration resistance of a road surface using a steel ball with a diameter of 19,0 mm. The result may be use

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To = temperature of road suggested for particular location (CC) K :::; temperatura..susceptibility of penetration (mm'OC).

K-factors recommended:

0.04 mrnj"C 0,05 mm/PC 0.07 rnrn!OC 0,08 mmJ"C

Single and multip!e seals (not fatty) Slurry seals (not fatty) . Cape seals (not fatty) Fatty roads and premix surfacings.

It should be noted that the re:ationsnlp is valid for all road surfaces and tem -peratures (To) lying between 25 and 55 cG.

REFERENCE MARAIS. C p, Advances in the design ana application of bifummous mateflals in road construction. PhD (Eng) theSIS. University of Natal. Durban, South Af rica. 1979

Special methods Draft TMH6, Pretoria. South AfTica. 1984

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18 Special method$

Draft TMH6. Pretoria, South Africa, 1984

TMH 6-1TMH 6-2TMH 6-3