G/TBT/N/CHL/545  
7 December  2020 
(20-8767) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  Spanish  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6.  
 
1. Notifying Member : CHILE 
If applicable, name of local government involved (Articles 3.2 and 7.2):  
2. Agency responsible : Dirección General de Obras Públicas  (Directorate -General of 
Public Works)  
Name and address (including telephone and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:  
Subsecretaría de Relaciones Económicas Internacionales - Ministerio de Relaciones 
Exteriores de Chile (Under -Secretariat for International Economic Relations, Ministry of 
Foreign Affairs of Chile)  
3. Notified under Article 2.9.2 [X], 2.10.1 [ ], 5.6.2 [ ], 5.7.1 [ ], other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading . ICS numbers may be provided in addition, where applicable) : Fly ash for 
concrete - Requirements  
5. Title, number of pages and language(s) of the notified document : NCh 3520:2020 
Cenizas volantes para hormigón - Requisitos  (Chilean Standard (NCh) No. 3520:2020, Fly 
ash for concrete - Requirements) (9 pages, in Spanish)  
6. Description of content : The notified Standard establishes the requirements governing 
the physical and chemical properties of, and the quality control procedures for, fly ash as 
defined in Article 3.1, for use as an addition in the production of concrete compliant with 
NCh No. 170. Fly ash conforming to this Standard may also be used in mortars and grouts.  
(1.2) This Standard covers the use of fly ash obtained directly from the combustion of 
pulverized coal in thermal power plants. (1.3) This Standard does not apply to fly ash 
collected from its disposal site, unless  the electricity generator takes measures so that 
ash may be collected or processed in a manner that ensures it is suitable, homogeneous 
and contamination -free, for use in concrete. (1.4) This Standard does not apply to a sh 
obtained from co -combustion and from municipal, agricultural, forest and industrial waste 
incineration. (1.5) It is beyond the scope of this Standard to specify provisions governing 
the production of concrete, i.e. requirements concerning composition, m ixing, placing, 
curing etc. of concrete containing fly ash . As regards such provisions, reference should 
be made to other standards for concrete, such as NCh No. 170. 
7. Objective and rationale, including the nature of urgent problems where 
applicable : Quality requirements  G/TBT/N/CHL/545  
- 2 - 
  8. Relevant documents:  
• Nch 147, Cementos - Análisis Químico ; 
• Nch 150, Cementos - Determinación de la finura por tamizado húmedo ; 
• Nch 161, Cemento - Puzolana para uso en cementos - Especificaciones ; 
• Nch 170:2016, Hormigón - Requisitos Generales ; 
• ASTM C 311, Standard Test Methods for Sampling and Testing Fly Ash or Natural 
Pozzolans for Use in Portland -Cement Concrete;  
• ASTM C  1012, Standard Test Method for Length Change of Hydraulic -Cement 
Mortars Exposed to a Sulfate Solution ; 
• ASTM C 1567, Standard Test Method for Determining the Potential Alkali -Silica 
Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated 
Mortar -Bar Method);  
• EN 196 -3, Methods of testing cement - Part 3 : Determination of setting times  and 
soundness;  
• EN 197 -1:2011, Cement - Part 1 : Composition, specifications and conformity 
criteria for common cements;  
• EN 451 -1, Method of testing fly ash - Part 1 : Determination of free calcium oxide 
content;  
• Manual de Carreteras del MOP  (http://mc.mop.g ov.cl/).  
9. Proposed date of adoption : - 
Proposed date of entry into force : - 
10. Final date for comments : 60 days from notification  
11. Texts available from : National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:  
Subsecretaría de Relaciones Económicas Internacionales  
Ministerio de Relaciones Exteriores de Chile  
Teatinos 180, piso 11  
Tel.: (+56)-2-22827 5250  
Email: tbt_chile@subrei.gob.cl  
To view the above -mentioned standards, go to https://www.inncoleccion.cl/  and enter 
the following details:  
Empresa  (Company) : SUBREI -004 
Usuario  (Username) : subrei 
Contraseña  (Password) : subrei