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Use of blast furnace slag to increase the durability of CB road covers

Use of blast furnace slag to increase the durability of CB road covers

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The methodology describes how to proceed when using ground granulated blast furnace slag (hereinafter referred to as slag) in concrete during the construction of transport infrastructure objects, with a focus on use in concrete for cement-concrete covers of highways and Class I roads. Slag can enter as a component of cement (CEM II/AS and CEM II/BS) or as an active admixture in the production of concrete. The methodology describes the replacement of Portland clinker with slag up to 35% by weight. concrete mixes. Experiences from the implementation of the test section on the D1 highway in 2018 and 2019, where the procedures specified in this methodology were applied, are described.

The methodology follows the work of the working group of the Directorate of Roads and Highways of the Czech Republic for the verification of the service life of cement-concrete road covers and is based on the results of projects that have been devoted to this topic in recent years, in particular ISPROFIN No. 5001150001: Verification of a new concrete formula for CBK (ŘSD); TH03020404: Life extension of cement-concrete covers using mineral admixtures and mixed cements (TAČR); LO1610: Transport R&D center (MŠMT).


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Detail

Autor

  • Slánský B.
  • Dvořák R.
  • Šmilauer V.
  • Valentine J.
  • Stryk J.
  • Grošek J.

Obsah

1. Introduction
1.1 Objective and determination of the methodology
1.2 Solved research project
1.3 Requirements for CB cover in the Czech Republic and abroad

2. Own description of the methodology
2.1 Blast furnace slag
2.2 Mixed cement
2.3 CB cover
2.4 Formulation and specification of conditions, requirements and properties that result from ČSN 73
6123-1 as part of the construction tender documentation
2.5 Procedure for using slag in the CB cover

3. Novelty of procedures, method of application and economic aspects
3.1 Comparison of the novelty of procedures
3.2 Description of the application of the certified methodology
3.3 Economic aspects

Dedikace

The methodology follows on from the activities of the working group of the Directorate of Roads and Highways of the Czech Republic for the verification of the service life of cement-concrete road covers and is based on the results of projects that have been devoted to this topic in recent years, in particular ISPROFIN No. 5001150001: Verification of the new concrete recipe for CBK (ŘSD); TH03020404: Life extension of cement-concrete covers using mineral admixtures and mixed cements (TAČR); LO1610: Transport R&D center (MŠMT).

Tiráž

Release year: 2020