GENERAL INFORMATION Hi-Micro Modified Bitumen Emulsion for Microsurfacing

What is Microsurfacing?

Microsurfacing is a mixture of Polymer Modified Emulsified Bitumen, Dense Graded Crushed Mineral Aggregates, Mineral Filler (normally Portland Cement), Water and Chemical Additives to facilitate early setting of mix.

History of Micro surfacing Emulsion :

Micro Surfacing was processed in Germany in the early 1970. After a continuous research over the time resulting in as modern Micro Surfacing, this was introduced first in United States in 1980. Now it is only most cost effective treatment in the surfacing rutting problems.


WORK IN PROGRESS IN MORDABAD – BARELLY ROAD PROJECT IN U.P. (2019)

Composition :

The typical composition of Microsurfacing mix consist of following ingredients

  • NR Latex Modified Bitumen Emulsion ( 12% to 13% )
  • Dense Graded Aggregate ( 6 mm 100% )
  • Cement (0.5% to 1.5% )
  • Additives ( 0.5% to 2.0% )
  • Water ( 10% to 12% )

Advantage of Microsurfacing

1 Quick Setting 2 Early opening to traffic
3 Higher resistance to abrasion 4 Can be used for Medium to high volume traffic corridors
5 Fast construction 6 Delays in hardening of bitumen due to environmental conditions
7 Less air/noise pollution 8 Preservation of pavements’ structural strength
9 Cost effective 10 Marginal raise in pavement height
11 Prevent various type of cracking 12 Least environment pollution
13 Seals wide cracks effectively 14 Faster laying process
15 Better visibility at night 16 High durability due to polymer effect.
17 No rolling and compaction is required 18 Long life of Pavements

Applications :

  • A. Preventive and periodic maintenance
  • B. Various type of filling with the help of special Seal coat
  • C. Improvement in skid resistance and friction on road

Limitations :

  • Not to apply in rain or rainy weather
  • Aggregates should be dry, clean and dust free.

MORDABAD – BARELLY ROAD PROJECT (U. P.) - 2019
ULUBERIA – KOLAGHAT (W.B.) ON NH-6


View of road before Microsurfacing
After six month
After one week


Requirements Specifications Test Method
Residue on 600µm IS Sieve ( % by mass), maximum 0.05 IS : 8887
Viscosity by Saybolt Furol Viscometer at 25ºC second 20 - 100 IS : 8887
Coagulation of Emulsion at low temperature NIL IS : 8887
Storage Stability after 24 h (168h) % maximum 2 (4) IS : 8887
Partical charge +ve /-ve + ve IS : 8887
Test on Residue
a Residue by evaporation % minimum 60 IS : 8887
b Penetration at 25 °C/100g/5s 40-100 IS : 1203
c Ductility at 27 ºC cm minimum 50 IS : 1208
d Softening Point °C minimum 57 IS : 1205
e Elastic Recovery * % minimum 50 IS : 15462
f Solubility in Trichoroethylene % minimum 97 IS : 1216

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