ISO 17785-2:2018

INTERNATIONAL ISO
STANDARD 17785-2
First edition
2018-05
Testing methods for pervious
concrete —
Part 2:
Density and void content
Méthodes d'essai pour ciments perméables —
Partie 2: Titre manque
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Freshly mixed pervious concrete . 1
4.2 Hardened pervious concrete . 2
5 Apparatus . 2
6 Sampling . 3
7 Procedure. 3
7.1 Freshly mixed pervious concrete . 3
7.1.1 Filling . 3
7.1.2 Strike off . 3
7.1.3 Cleaning and weighing . 3
7.2 Hardened pervious concrete . 3
7.2.1 Moulded cylinder preparation . 3
7.2.2 Core preparation . 4
7.2.3 Measuring . 4
7.2.4 Constant dry mass . 4
7.2.5 Submerging. 4
7.2.6 Measuring temperature . 4
8 Calculation . 4
8.1 Density . 4
8.1.1 Freshly mixed pervious concrete . 4
8.1.2 Hardened pervious concrete . 5
8.2 Void content . 5
8.2.1 Freshly mixed pervious concrete . 5
8.2.2 Hardened pervious concrete . 5
9 Test report . 6
Bibliography . 7
Foreword
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This document was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-
stressed concrete, Subcommittee SC 1, Test methods for concrete.
A list of all parts in the ISO 17785 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 17785-2:2018(E)
Testing methods for pervious concrete —
Part 2:
Density and void content
1 Scope
This document specifies a procedure for testing the density and void content of freshly mixed and
hardened pervious concrete specimens for pavement in the laboratory or cored from field placements.
This document also specifies formulae for calculating the density and void content of pervious concrete.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at https: //www .electropedia .org/
3.1
density
ratio of the mass of a given quantity of concrete to its volume, (kg/m )
3.2
void content
percentage (%) of voids
3.3
pervious concrete
concrete which has interconnected voids that allow for water flow through them.
Note 1 to entry: Pervious concrete for pavement is usually made with little or no fine aggregate and contains
narrowly graded coarse aggregate typically with the maximum size of 10 mm. The nominal maximum size is 25 mm.
4 Principle
4.1 Freshly mixed pervious concrete
For fresh pervious concrete, a sample is placed and consolidated in a standard measure. The density and
void content of the pervious concrete are calculated based on the measured mass of the
...