GB/T 25032-2026Municipal solid waste incineration bottom ash aggregate (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 25032-2010 "Aggregates from Municipal Solid Waste Incineration Ash". Compared with GB/T 25032-2010, the main differences are in the structural design. Aside from integration and editorial changes, the main technical changes are as follows:

a) Added "[Municipal Solid Waste Incineration] Slag Aggregate", "Mixed Aggregate", "Coarse Aggregate", "Fine Aggregate", "Magnetic Metals", "Heavy Non-ferrous Metals", and "Metals" The terminology and definition of "residual material rate" (see 3.1-3.7);

b) The terms and definitions for "aggregate" and "light floating matter" have been removed (see

3.2 in the.2010 edition);

c) Added "Classification and Coding" (see Chapter 4);

d) General requirements for slag aggregates have been added (see 5.2~5.5);

e) Increased the crushing value of aggregates, residual magnetic metal content, residual elemental aluminum content, elemental aluminum content, residual heavy non-ferrous metal content, and expansion. Rate and glass content indicators (see Chapter 6);

f) The particle size specification has been changed (see Chapter 6,

4.2.1 of the.2010 edition);

g) The impurity content and cylinder compressive strength indicators have been removed (see

4.2.4 in the.2010 edition);

h) The sampling and sample preparation methods have been changed (see 7.1, 7.2, Appendix A,

5.1 of the.2010 edition);

1 Scope

GB/T 25032-2026 is the Chinese national standard covering the bottom ash of a waste incinerator processed into a construction aggregate - the metals removed, the leaching limits, the soundness and the grading, on a material produced in large quantity that otherwise has to be landfilled. It replaces GB/T 25032-2010 and has been in force since 1 October 2026. It was issued on 31 March 2026 and takes effect on 1 October 2026, replacing GB/T 25032-2010. The document is under the responsibility of the Ministry of Housing and Urban-Rural Development. This page is published from the official record of the 2026 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

This document specifies the classification and coding, general requirements, technical requirements, sampling and sample preparation, and inspection rules for municipal solid waste incinerator ash aggregates. The marking, packaging, storage and transportation are described, along with the corresponding test methods. This document applies to the production and inspection of aggregates from municipal solid waste incineration slag (hereinafter referred to as slag).

4 Classification and Coding

4.1 The categories and category codes of slag aggregates based on particle size distribution are as follows:

---General materials. represented by the uppercase Latin letter T;

---Coarse aggregate. Represented by the uppercase Latin letter C;

---Fine aggregate. Represented by the uppercase Latin letter X.

4.2 The aggregates are not graded. Coarse aggregates and fine aggregates are classified into two categories according to performance requirements. Grade I and Grade II, respectively.

4.3 The classification results of slag aggregates were coded using a parallel coding method. The coding structure diagram is shown in Figure 1. This document number Grading Classification (Level I, Level II) Particle size classification (T, C, X)

5 General Requirements

5.1 The slag shall comply with the requirements of GB 18485, wherein radioactivity shall comply with the requirements of GB 6566, and the leaching toxicity of heavy metals shall comply with the requirements of GB 18485. The provisions of GB 5085.3.

5.2 For the metal residue rate test, samples should be taken separately from the same batch of slag and slag aggregate. Slag sampling should preferably be done at the plant's inbound storage point, while slag aggregate sampling should be done separately. Material sampling should preferably be taken from the finished product conveyor belt, but sampling can also be taken at the storage point.

5.3 Sampling of slag should be completed within 3 days of its arrival at the plant, and sampling of slag aggregate should be completed within 1 week of production; sampling should be completed within the same shift. Once the sample is prepared, it should be stored in a sealed container and the test should be completed within 3 days.

5.4 Safety precautions should be taken during sampling, sample preparation and testing; relevant instruments and equipment should be maintained and repaired regularly.

5.5 In addition to complying with the provisions of this document, the production, inspection and use of slag aggregates shall also comply with my country's environmental protection, safety and information technology regulations at all stages. The application of slag aggregates should also comply with relevant standards and specifications.

6.Technical Requirements The technical specifications for slag aggregates should meet the requirements specified in Table 1.

9 Inspection Rules

9.1 Inspection Classification Product inspection is divided into type inspection and factory inspection. The inspection items and order are shown in Table 4.

9.2 Type Testing Type testing shall be performed according to the requirements of Table 4 under any of the following circumstances.

a) During normal production, this should be carried out at least once a year;

b) When the slag aggregate production process changes;

c) When a slag aggregate production plant resumes production after being shut down for 3 months or more;

d) When changes occur in the slag incineration plant or incineration process;

e) When the composition of the slag changes significantly.

9.3 Factory Inspection The slag aggregate shall undergo factory inspection in accordance with the requirements specified in Table

4.The frequency of factory inspection shall not be less than once per batch.

9.4 Batching Rules A single production line can process no less than.200 tons of slag per day, with 600 tons of slag aggregate products constituting one batch; a single production line can process less than... 200t, and each batch consists of 400t of slag aggregate products.

10 Marking, Packaging, Storage and Transport

10.1 Mark A quality certificate should be provided when the slag aggregate leaves the factory, including the following.

a) Slag aggregate coding;

b) Manufacturer;

c) Batch number and quantity supplied;

d) Test results and date;

e) Certificate number and issuance date;

f) Signatures and seals of the inspection department and inspection personnel.

10.2 Packaging When slag aggregate requires packaging, the packaging method can be negotiated between the supplier and the buyer based on the actual situation.

10.3 Storage and Transportation Slag aggregates should be stored and transported separately according to their categories. Storage areas should be hardened and equipped with waterproofing and isolation measures to prevent rain damage. During transportation, measures should be taken to prevent water damage, dust damage, and spillage. GB/T 25032-2026. Aggregate from Municipal Solid Waste Incineration Ash ICS

68 National Standards of the People's Republic of China Replaces GB/T 25032-2010 Municipal solid waste incinerator slag aggregate Published on 2026-03-

31 Implemented on October 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.