1、 ISO 2016 Test methods for repair materials for water-leakage cracks in underground concrete structures Part 2: Test method for chemical resistance Mthodes dessai pour matriaux de rparation pour fissures dues leau dans les structures en bton souterraines Partie 2: Mthode dessai de la rsistance chimi
2、que TECHNICAL SPECIFICATION ISO/TS 16774-2 Reference number ISO/TS 16774-2:2016(E) First edition 2016-08-01 ISO/TS 16774-2:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publicati
3、on may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country o
4、f the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO/TS 16774-2:2016(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Principle
5、 1 5 Apparatus . 2 6 Preparation 2 6.1 Test specimens 2 6.2 Chemical substance . 2 6.3 Ambient conditions . 2 7 Procedure. 3 8 Expression of results 3 9 Test report . 3 9.1 Information on the repair material of the test target 3 9.1.1 General 3 9.1.2 Other information . 4 9.2 Information on the test
6、 4 Annex A (informative) Example test method . 5 Bibliography 8 ISO 2016 All rights reserved iii Contents Page ISO/TS 16774-2:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
7、ternational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison
8、with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directi
9、ves, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some
10、 of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarat
11、ions received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformit y assessment, as well as information ab
12、out ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html. The committee responsible for this document is ISO/TC 71, Concrete, reinforced concrete and pre- stressed concrete, Subcommittee SC 7, Ma
13、intenance and repair of concrete structures. ISO/TS 16774 consist of the following parts, under the general title Test methods for repair materials for water-leakage cracks in underground concrete structures: Part 2: Test method for chemical resistance Part 3: Test method for water (wash out) resist
14、ance Part 4: Test method for adhesion on wet concrete surface The following parts are under preparation: Part 1: Test method for thermal stability Part 5: Test method for watertightness Part 6: Test method for response to the substrate movementiv ISO 2016 All rights reserved ISO/TS 16774-2:2016(E) I
15、ntroduction This Technical Specification is linked to ISO/TR 16475. ISO/TR 16475 outlines 6 basic properties and the required performance levels of water leakage repair materials, and ISO/TS 16774 proposes a tentative, sample testing methods that are capable of evaluating the respective properties o
16、f the repair materials. The test methods in this Technical Specification are intended to serve as a reference for nations that have not yet developed a test method on the 6 required performance properties of water leakage repair materials. If other forms of test methods that are simpler, more accura
17、te or more organized are available, such methods are recommended for use instead. Many of the dependent variables outlined in the reference test methods of this Technical Specification are subject to change in accordance to the environmental conditions (temperature and humidity, chemical solution an
18、d concentration, width of movement activity, water pressure or water flow velocity, etc.) outlined in the standards used in respective countries. For ISO/TS 16774-1, ISO/TS 16774-5 and ISO/TS 16774-6, for the purpose of objectively comparing the performance of injected repair materials, artificial c
19、racks of same width, height, and volume were used to control the usage of repair materials for each testing cycle and enable repetition of the same test methods under the same conditions. ISO 2016 All rights reserved v Test methods for repair materials for water-leakage cracks in underground concret
20、e structures Part 2: Test method for chemical resistance 1 Scope This part of ISO/TS 16774 specifies a laboratory test method for the qualitative determination of the retention level of chemical resistance of repair materials in repaired cracks of concrete structures in conditions where the material
21、 is either underwater or in contact with water that may have various chemical components present. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited a
22、pplies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/TR 16475, Guidelines for the repair of water-leakage cracks in concrete structures 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in IS
23、O/TR 1 6 4 7 5 a n d t h e following apply. 3.1 repair material for water-leakage cracks grouting materials used to prevent water-leakages in concrete cracks Note 1 to entry: In this Technical Specification, target ingredients are limited to injection materials outlined in ISO/TR 16475. 4 Principle
24、A repair materials resistance to chemical attacks is one of the fundamental properties that water- leakage repair materials should possess. While repair materials can undergo chemical property changes due to chemical attack, and moreover, harmful chemical substances can also corrode the repair mater
25、ials and reduce their repair performance in water-leakage cracks. This test method evaluates a water-leakage repair materials chemical resistance performance by determining if the tested material can maintain as closely as possible its original mass after being exposed to various types of chemical s
26、ubstances as a means to evaluate the materials resistance against chemical corrosion. In this method, comparing the mass difference of water leakage repair materials before and after chemical exposure can be used to determine the repair materials chemical resistance level. An example test method is
27、provided in Annex A. The tested repair material sample prepared in a Petri dish is placed in a container and completely immersed in chemical solutions for predetermined number of hours or days (values subject to change in accordance to different national standards). The concentration of the tested c
28、hemical solution follows the condition of the applied environment belonging to different national standards, meaning test chemical substances that represent common chemical substances that are exposed to concrete TECHNICAL SPECIFICATION ISO/TS 16774-2:2016(E) ISO 2016 All rights reserved 1 ISO/TS 16
29、774-2:2016(E) material and repair materials, as well as exposure time and chemical concentration range values should reflect the applicable environmental conditions. Test specimens are treated so that they remain in a stable state prior to immersion in chemical substance so that physical factors suc
30、h as swelling, pore-filling, or bubbling do not affect the principles of this test method. The mass of the test specimen after immersion in chemical substance is measured using an electronic scale and the mass difference is recorded. Tested types of repair materials in this part of ISO/TS 16774 are
31、limited to injection type water-leakage repair materials. 5 Apparatus 5.1 Container. Any size of plastic or glass type of container used to contain the chemical solution and immerse the test specimens (quality of the material of container, bowl, or dish being used should be made with materials that
32、are non-reactive to chemical substance). 5.2 Others. 5.2.1 Glass testing dishes (Petri dish) and plate (used to keep the height of specimen). 5.2.2 Electronic scale (measurable up to two decimal places in unit grams). 5.2.3 Stirring rod and trowel used for specimen placement into Petri dish. 5.2.4 O
33、ther types of injecting apparatus (optional). 6 Preparation 6.1 Test specimens Prepare the glass testing dish filled with the repair materials. Repair material surface should be treated with a trowel or other surface treating tools to make certain the surface of the material is flat (tolerance for u
34、neven surface allowed). Should there be a specific instruction provided by the manufacturers end on how to prepare/inject material, such method should be used instead. 6.2 Chemical substance Prepare the chemical substances. Example chemical substances can be used such as acid (HCl, H 2 SO 4and HNO 3
35、 , etc.), alkali (NaOH, etc.), and NaCl which are commonly found in underground water. At this time, the concentration and mixture ratio of the chemical solution should be determined in accordance with the required environmental conditions. Other types of common harmful chemical substances can be us
36、ed as well for this test method such as nitrate, carbonate, acetate, sulfate, etc. 6.3 Ambient conditions Keep the test room at temperature (20 3) C and humidity at (65 5) % during the experiment unless specifically required otherwise. NOTE Temperature values are subject to change according to diffe
37、rent national standards. Examples may include warmer countries with ranges that can reach up to (27 2) C and colder countries at (16 3) C, etc. The same applied to humidity conditions.2 ISO 2016 All rights reserved ISO/TS 16774-2:2016(E) 7 Procedure a) Measure and record the mass (Mb, Mass of specim
38、en before chemical exposure) of the test specimens (up to two decimal places in grams). b) Place a plate on the bottom center of the container used to maintain the height of test specimen. c) Place the test specimen on the center of that plate. The specimens position should be fixed at the center of
39、 the plate in the chemical solution container. In the cases where the prepared specimen floats on the chemical solution, the Petri dish with the specimen sample should be fixed to the bottom of the container with dual sided tape. d) Carefully fill the container with the prepared chemical substance a
40、nd let it rest for a specified duration (concentration ratio and duration can vary according to different national standards used to control the test method conditions). e) After the specified duration has passed, take the test specimens out of the container, and lightly wash off any residues of che
41、mical solution remaining on the repair material surface with distilled water, and let the test specimens dry to constant mass with +/- tolerance. and calculate the difference (up to two decimal places in grams). Measure the mass (Ma, Mass of specimen after chemical exposure) of test specimen after i
42、mmersion and calculate the mass change (Mc = Mb - Ma, Mc: mass change) before and after immersion in the chemical substance. f) Record the mass of the test specimens (up to two decimal places in grams). Photos of the specimen and equipment conditions shall be taken at every stage during the each and
43、 every test procedure for recording and information purposes. 8 Expression of results In this test method, the tested repair materials resistance to corrosion due to exposure to chemical substance is measured via the changes in the mass. In this case, results of the tested repair material evaluation
44、 shall be based on how much mass was lost after immersion in the chemical solution, as this information can be used to determine that materials with higher loss of mass have relatively weaker resistance to chemical corrosion. These results (Mb Ma = Mc) can be used as a data base for an evaluation gu
45、ideline in future cases of selecting appropriate repair materials with the required properties against chemical corrosion. 9 Test report 9.1 Information on the repair material of the test target 9.1.1 General The test report should record the following information on repair material of the test targ
46、et: a) manufactured date, time, place of the repair material; b) manufacturer (name, address, phone number); c) type, storage method and authentication of the repair material; e) guideline and manual on how to use and apply the repair material; f) data on chemical composition of repair material as i
47、ndicated in manufacturers data sheet. ISO 2016 All rights reserved 3 ISO/TS 16774-2:2016(E) 9.1.2 Other information The following information is recorded on demand if required: a) objective of the testing and related project; b) applicable areas in construction sites using the test specimen; c) resu
48、lt of eco-toxicological performance tests to account for the release of hazardous substance and the subsequent effects on health and safety. 9.2 Information on the test The test report should record the following information on the test: a) test manager; b) name, purpose of the test; c) ambient cond
49、ition of the lab (temperature, humidity, safety conditions, etc.); d) production time and place of the specimens; e) shape and size of the specimens; f) identification of the specimens (Lot No., etc.); g) curing and storage conditions; h) information on the test repair material (name, producer, validity, etc.); i) test data (production, measurement, test period, etc.); j) type of facilities, equipment, tools; k) status of test equipment, tools; l) test results; m) details on other test programs and procedures.4
