2.D.3.b - Road Paving

Last updated on 25 Mar 2020 07:41 (cf. Authors)

Short description

NFR-Code Name of Category Method AD EF Key Category 1
2.D.3.b Road Paving T1 AS CS no key source

Currently, the report tables list produced quantities of mixed asphalt products (from stationary installations only) and NMVOC, NOx and SO2 emissions caused of this. Only emissions from asphalt production are reported. Figures relative to emissions released during laying of asphalt have not been examined.


Activity data

The applicable quantity of mixed asphalt products produced (activity rate) has been taken from communications of the Deutscher Asphaltverband (DAV; German asphalt association). In total about 660 asphalt-mixing plants produce more than 40 Million tonnes of hot-mix for road paving [1].

Emission factors

Emission factors have been determined country-specifically, pursuant to Tier 2. For determination of emission factors for emissions measurements from over 400 asphalt-mixing plants, made during the period 1989 through 2000, were used. The majority of the emissions occur during drying of pertinent mineral substances. Almost all of the NMVOC emissions originate in the organic raw materials used, and they are released primarily in parallel-drum operation, as well as from mixers and loading areas. On average, about 50% of the NOx and SO2 involved come from the mineral substances (proportional process emissions). CO emissions are calculated solely in connection with fuel inputs.

Table 1: Overview of applied emission factors, in kg/t
pollutant Name of Category EF value EF trend
NMVOC Production of mixed asphalt 0.030 constant
NOx Production of mixed asphalt 0.015 constant
SOx Production of mixed asphalt 0.030 constant
TSP Production of mixed asphalt 0.006 constant
PM10 Production of mixed asphalt 0.0057 constant
PM2.5 Production of mixed asphalt 0.003 constant


With activity data and emission factors remaining unrevised, no recalculations have been carried out compared to last year's submission.

Planned improvements

At the moment, no category-specific improvements are planned.

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