FGSV Colloquium // InLine Pave® Rooted in the German Catalogue of Construction Methods
Part 3: Inviting Tenders for Compact Asphalt Pavements

Inviting Tenders for Compact Asphalt Pavements:
A Simple Matter

Many professionals are now aware of the advantages of compact asphalt pavements. But how do you invite tenders correctly and completely for a construction project using this method? RoadNews has compiled some of the most pressing questions and answers.

Question 1: Why is it that invitations for tendering compact asphalt pavements are still not common?

Since this method has only recently become established as a standard method, the parties inviting tenders have little experience when it comes to the choice of materials or to ensuring that their invitations to tender are correctly worded and complete.

Question 2: Are specimen texts available that can be used as a guide when inviting tenders?

Specimens do indeed exist for inviting tenders for all works associated with this construction method. The German Asphalt Association (DAV) in Bonn has drawn up corresponding texts. They can be taken from the standard bill of quantities for asphalt works and adapted to the requirements of the particular project.

These specimen texts for inviting tenders for compact asphalt pavements and a great deal more are contained in the guide “Inviting tenders for asphalt works, edition 2010” which is published by the German Asphalt Association (www.asphalt.de). A revised edition with updated tests for compact asphalt pavements is due to be published in January 2013.

Question 3: For which load classes (formerly: construction classes) are specimen texts available?

Specimen texts are available for various different kinds of road.

Example A shows a specimen for highly trafficked roads of load classes BK100 to BK10 according to the Guidelines for Standardization of the Superstructure of Roadways (RStO 12) (formerly: construction classes SV, I and II according to RStO 01).

Example B shows a specimen for urban roads of load class BK3.2 according to RStO 12 (formerly: construction class III according to RStO 01).

They primarily differ with regard to the layer thickness and choice of aggregate size.

Question 4: Are there any other contractual points to be noted?

One important detail must not be overlooked: when inviting tenders for compact asphalt pavements in Germany, the Supplementary Technical Contractual Terms and Guidelines for the Construction of Asphalt Roadways (ZTV Asphalt-StB) must be validly agreed in the construction contract and in the description of work.

Question 5: How can contractors tender compact asphalt pavements although conventional construction has been requested for a project?

They can submit an alternative bid – these are welcomed by many of the offices inviting tenders. Contractors can use text blocks published by the German Asphalt Association (DAV) in Bonn for these alternative bids.

Question 6: Where can one find further information concerning this construction method?

Useful information can be found in the “Data Sheet on Compact Asphalt Pavement Construction (M KA), edition 2011” published by the German Road and Transportation Research Association (FGSV). The data sheet can be ordered through the website of the FGSV publishing house (www.fgsv-verlag.de).

Question 7: Compact asphalt pavements were predominantly developed and tested in Germany. How can this construction method be used in other countries?

Applying the rules and standards to other countries is basically not a problem. Most of the details can be adopted for countries with a climate similar to that in Germany, naturally with due regard for the materials available in the region concerned. In other regions, the climatic conditions result in corresponding technical requirements for aggregate and binder which must be adapted when wording the invitation to tender.

Specimen Texts for the Bill of Quantities

Example A for highly trafficked roads

Load classes BK100 to BK10 according to RStO 12 (formerly: construction classes SV, I and II according to RStO 01).

1.1 ) Placing ... m² of asphaltic binder course made from AC 22 B S

  • Place binder course of asphaltic binder AC 22 B S.
  • For traffic areas of load class BK100 (formerly: construction class SV).
  • Layer thickness = 10cm.
  • Binder = 10/40-65 A.
  • Coarse mineral aggregate = Category C 100/0.
  • Bottom layer of a compact asphalt pavement built “hot on hot”.

1.2 ) Placing ... m² of asphalt wearing course made from SMA 8 S

  • Place wearing course of stone mastic asphalt SMA 8 S.
  • For traffic areas of load class BK100 (formerly: construction class SV).
  • Layer thickness = 2cm.
  • Binder = 25/55-55 A.
  • Coarse mineral aggregate = Category C 100/0.
  • Filler = limestone, category CC 70.
  • Top layer of a compact asphalt pavement built “hot on hot”.

The German Asphalt Association (www.asphalt.de) provides wording for several invitations to tender in its guide “Inviting tenders for asphalt works”. An updated version with specimen texts for compact asphalt pavements is due to be published in January 2013.

Example B for urban roads

Load class BK3.2 according to RStO 12 (formerly: construction class III according to RStO 01).

2.1 ) Placing ... m² of asphaltic binder course made from AC 16 B S

  • Place binder course of asphaltic binder AC 16 B S.
  • For traffic areas of load class BK3.2 (formerly: construction class III).
  • Layer thickness = 8cm.
  • Binder = 25/55-55 A.
  • Coarse mineral aggregate = Category C 100/0.
  • Bottom layer of a compact asphalt pavement built “hot on hot”.

2.2 ) Placing ... m² of asphalt wearing course made from SMA 8 S

  • Place wearing course of stone mastic asphalt SMA 8 S.
  • For traffic areas of load class BK3.2 (formerly: construction class III).
  • Layer thickness = 2cm.
  • Binder = 25/55-55 A.
  • Coarse mineral aggregate = Category C 100/0.
  • Filler = limestone, category CC 70.
  • Top layer of a compact asphalt pavement built “hot on hot”.
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