Case studies of Advanced Construction and Demolition waste(CDW)
Recycling initiatives and technologies In JAPANAffiliation
Location
Position:
Name/Surname

Affairs Council of Recycled-Aggregate Concrete(ACRAC)
201B,4-1-1 Nishi Azabu Minato-ku, Tokyo 106-0031
ACRAC Executive Director
EIGO IDE

e-mailinfo@acrac.org

Title

ACRAC Quality audit system(Quality audit system on recycled aggregate for concrete)
Prevention
Re-useTheme
classification〇

Technology
development stage〇

RecycleReduce Co2
LegacyBusiness to overseas
Etc.
Practical use
Scheduled to be put into practical use by 2020
Scheduled to be put into practical use after 2020

Specific content

This audit system for ACRAC members is a system to objectively
audit the quality of recycled aggregate for concrete from 2013.
The "Recycled Aggregate Concrete Committee" to conduct the final
judgment consists of six members, chaired by academics and experts(civil engineering and construction), administrative officials, research
institutions, users, related people and five members of the ACRAC Quality
Audit Committee.
At ACRAC, due to the audit by the Audit Committee and the approval of
the Recycled Aggregate Concrete Committee, we have issued an approval
letter for the use of the appropriate mark to manufacturing plants that
conform to the quality audit system.
At ACRAC, nine manufacturing plants nationwide are currently certified
as conforming factories.

appropriate markAppeal point

As the quality audit system on recycled aggregate for concrete using
concrete waste as the raw material, it is the first in Japan.

-15-

Affairs Council of Recycled-Aggregate Concrete (ACRAC)
Quality audit system(Quality audit system on recycled aggregate for concrete)

1. Outline of the quality audit systemTargets are ACRAC member companies.

The auditors designated by the “Quality Audit Committee” comprising representatives ofACRAC member companies.
(The chairman selects the auditors from the concrete engineers, chief engineers, and those withequivalent or higher qualification.) Audit to be executed by a pair of two auditors


Quality audit is to be executed according to the ACRAC Quality Audit Standard.

The audit results are summarized in the “Quality Audit Report” and determined tobe acceptable if justified by discussions in the “Quality Audit Committee” thatcomprises the people of experience or academic understanding, persons
concerned with administration, persons concerned with users, and the chairman
and members selected by the ACRAC working group.

-16-2. Quality Audit Standard
The quality audit standard is classified into “General Requirements,” “Particular Requirements,”“Field Inspection (Product Sampling Inspection).”Classification

Items

Contents

A. General requirements(1) Quality assurance(2) Compliance of eco-friendly goods andservices procurement(3) Reduction of environmental impact(4) Securing of technical capacity(5) Training(6) Handling of non-compliance(7) Environmental protection
1.Product management standard(1) Clarification of product quality(1) Original concrete

2. Manufacturing management(2) Manufacturing methodstandard(3) Manufacturing process quality
B. Particular requirements(1) Manufacturing equipment management
3. Equipment management standard(2) Inspection equipment management
4. Outsourcing management(1) Outsourcing managementstandard(1) Density(2) Percentage of absorption
C. Field inspection

Product inspection(3) Content of materials finer than 75µm
sieve-17-