DIGEST 2006 - Sabita

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Contents Foreword . . . . . . . . . . . . . . . . . . . . . 7 1. Valediction Local and international accolades mark retirement of Piet Myburgh . . . . . . . . . . . . . . . . . . . . 11 2. Industry Overview Bitumen, gravel and the fuel price in South Africa . . . . . . . . 17 Prof Don Ross Aggregate supply to the road construction sector . . . . . . . 28 Alex Weideman Health and safety in the workplace . . . . . . . . . . . . 30 Piet Myburgh 3. Education and Training Updating best practice guidelines and documents . . . . . . . 39 Trevor Distin SA's education system: A systematic overhaul is vital to sustainable skills acquisition . . . . . . . . . . . . . 45 Prof Emile Horak Improving service delivery through appropriate road maintenance . . . . . . . . . . . . . . . . . . 61 Mike Winfield SAT: <strong>2006</strong> activities generate a new vision of member service . . . . . . . . . . . . . . . . . . . 64 John Onraët Flexible pavement engineering course to cater for industry needs . . . . . . . . . . . . . . . . . . . 67 Les Sampson 4
4. Innovation The use of steel slag aggregate in asphalt mixes . . . . . . . 73 Hugh Thompson, Michael Bouwmeester In search of sustainable pavement solutions . . . . . . . . . 82 Prof Kim Jenkins, Dr Fritz Jooste Overcoming temperature and time constraints using FT wax . . . . . . . . . . . . . . . . . . . . 88 Francois Bornmann, Robbie Hiley, Stefan Strydom Advantages of SA's new single pass surface dressing machine . . 96 Deon Pagel Innovative design methods for HMA in Gauteng . . . . . . . 102 Derick Pretorius, Herman Marais Forensic investigation into premature distress in asphalt . . . . 111 Elzbieta Sadzik 5. Best Practice Old habits die hard ... especially in Cape Town . . . . . . . 119 Julian Wise Disposal of penetration grade bitumen in South Africa . . . . . 126 Mannie Levin Bond and tack coats to improve total structural integrity . . . . . . . . . . . . . . . . . 130 Kobus Louw A performance classification system for SA: Quo Vadis? . . . . 138 Prof Kim Jenkins The use of modified binders in road construction in SA . . . . . 143 Dennis Rossmann Developments in seal design . . . . . . . . . . . . . . 147 Gerrie van Zyl The influence of weather on prime applications . . . . . . . 150 Johan Muller The development of a Road Transport Management System in SA . . . . . . . . . . . . . . . . . . . . . . 159 Paul Nordengen Accreditation of thin bituminous surfacings in SA . . . . . . . 166 John Odhiambo 5
Page 1 and 2: DIGEST 2006
Page 3: Mission Sabita’s plans and action
Page 7 and 8: 1 Valediction
Page 9 and 10: economic growth. In addition to str
Page 11 and 12: one of the world leading trade orga
Page 13 and 14: Choosing road surfaces: Bitumen, gr
Page 15 and 16: we can economically test a possible
Page 17 and 18: oads. These considerations influenc
Page 19 and 20: double that for two-lane surfaced r
Page 21 and 22: elative fluctuation by increasing o
Page 24 and 25: Optimising resource utilisation: Ag
Page 26 and 27: COSHEC in 2007: Health and safety i
Page 28 and 29: designed to assist road authorities
Page 30 and 31: • Obtain endorsement and commitme
Page 32 and 33: • institution of Sabita safety tr
Page 34 and 35: Towards an informed industry: Updat
Page 36 and 37: versions of some of Sabita’s earl
Page 38 and 39: from texture treatments to overlays
Page 40 and 41: South Africa's education system: A
Page 42 and 43: environment and red tape on small a
Page 44 and 45: Figure 2. Matric result trends the
Page 46 and 47: professional work, within the conte
Page 48 and 49: Assessing Teachers are often unclea
Page 50 and 51: 3 HG learners in a class of 40 SG).
Page 52 and 53: The following observations may be m
Page 54:
documented successful maths and sci
Page 57 and 58:
public awareness programme to illus
Page 59 and 60:
Surge in SAT's knowledge transfer a
Page 61 and 62:
organisation. With the improvement
Page 63 and 64:
accomplished through self-study. Th
Page 65 and 66:
4 Innovation
Page 67 and 68:
calcium oxide is not fully hydrated
Page 69 and 70:
oad construction. As mentioned prev
Page 71 and 72:
M ix type Coars e continuous Coarse
Page 73:
Conclusions From the results presen
Page 76 and 77:
itumen emulsion or foamed bitumen,
Page 78 and 79:
operations, as well as to advance a
Page 81 and 82:
Fischer-Tropsch wax bitumen modifie
Page 83 and 84:
Viscosity The significant influence
Page 85 and 86:
Figure 3: Layer temperature profile
Page 87 and 88:
easily formed and shaped where nece
Page 89 and 90:
Achieving cost-efficiency through t
Page 91 and 92:
Graded stone seals The seals that a
Page 93:
Figure 6 illustrates how the stone
Page 96 and 97:
decided rather to use the old TRH8
Page 98 and 99:
ecommendations (R69/97 for bitumino
Page 100 and 101:
compositional fractions (See Table
Page 102 and 103:
PRADO analysis. Large quantities of
Page 104 and 105:
HMA research programme: Forensic in
Page 106 and 107:
Conclusions The following conclusio
Page 108 and 109:
test programme, will seek to develo
Page 111 and 112:
Out of the box thoughts on traditio
Page 113 and 114:
Or more appropriately, a lone thar
Page 115 and 116:
seal, and everybody's happy! Or wer
Page 118 and 119:
The status quo on landfill sites: D
Page 120:
In August 2004 a status quo report
Page 123 and 124:
Bond coats Bond coats were first us
Page 125 and 126:
peak value of 1,2 J/cm 2 . Typical
Page 127 and 128:
promote the breaking of the emulsio
Page 130 and 131:
Bitumen stabilised materials: A per
Page 132 and 133:
Figure 2: DSR testing at comparativ
Page 135 and 136:
Revision of Technical Guideline 1 (
Page 137:
º introducing upper limits on some
Page 140 and 141:
void loss due to embedment and aggr
Page 142 and 143:
Alternatives to coal tar products:
Page 144 and 145:
you don’t measure” might have b
Page 146 and 147:
gradually increased from approximat
Page 148 and 149:
Conclusions MC 30 cutback bitumen
Page 151 and 152:
Towards industry self-regulation: T
Page 153 and 154:
Figure 2: Accidents involving heavy
Page 155 and 156:
RTMS standards for transport operat
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operators as part of their quality
Page 159 and 160:
• System installation i.e. applic
Page 161 and 162:
Notes 169
Page 163 and 164:
Advertiser Index Advertiser Page Co
Page 165 and 166:
Sabita Video Training Aids Video se
Page 167 and 168:
Associate Members Africon Engineeri
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DIGEST 2006 - Sabita

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