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GB/T 23265-2023: Chopped basalt fiber for cement concrete and mortar Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 23265: Historical versions
Similar standardsGB/T 23265-2023: Chopped basalt fiber for cement concrete and mortar---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT23265-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.100.40 CCS Q 12 Replacing GB/T 23265-2009 Chopped Basalt Fiber for Cement Concrete and Mortar Issued on. MAY 23, 2023 Implemented on. DECEMBER 1, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 6 2 Normative References... 6 3 Terms and Definitions... 7 4 Classification and Labeling... 8 5 General Requirements... 9 6 Technical Requirements... 9 7 Test Method... 11 8 Inspection Rules... 16 9 Marking, Exit-Factory, Packaging, Transportation and Storage... 17 Appendix A (Normative) Test Method for Breaking Strength and Tensile Strength of Plied Yarn... 19 Appendix B (Normative) Test Methods for Breaking Strength, Tensile Strength, Elastic Modulus and Elongation at Break of Strand... 23 Appendix C (Normative) Test Method of Alkali-Resistant Tensile Stress Retention Rate of the Piled Yarn... 30 Appendix D (Normative) Test Method of Alkali-Resistant Tensile Stress Retention Rate of Strand... 32 Appendix E (Normative) Bending Toughness Test Method... 341 ScopeThis Document specifies the classification and marking, general requirements, technical requirements, test methods, inspection rules, as well as marking, delivery, packaging, transportation and storage of chopped basalt fibers for cement concrete and mortar. This Document is applicable to chopped basalt fibers for cement concrete and mortar.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB 175 Common portland cement GB/T 4472-2011 Determination of density and relative density for chemical products GB/T 7690.5-2013 Reinforcements - Test method for yarns - Part 5.Determination of fiber diameter for glass fiber GB 8076-2008 Concrete Admixtures GB/T 9914.1 Test method for reinforcement products - Part 1.Determination of moisture content GB/T 9914.2 Test method for reinforcement products - Part 2.Determination of combustible-matter content for glass fiber GB/T 14684 Sand for construction3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in GB/T 18374 and the following apply. 3.1 Chopped basalt fiber The basalt fiber is cut into a certain length by a cutter so that it can be inorganic mineral fiber that is evenly dispersed in cement concrete or mortar. 3.2 Nominal diameter It is used to indicate the diameter of basalt fiber monofilament in basalt fiber products. 3.3 Strand A bundle of slightly bonded filaments drawn at the same time. 3.4 Plied yarn Fibers that are made by plying two or more strands. 3.5 Moisture content The moisture content of the strand or plied yarn measured under specified conditions, that is, the ratio of the difference between the wet mass and the dry mass of the specimen o the wet mass.4 Classification and Labeling4.1 Classification of product 4.1.1 Chopped basalt fibers are classified into strand (code S) and plied yarn (code T) according to their fiber types. 4.2 Specifications and dimensions 4.2.1 The specifications and dimensions of chopped basalt fibers shall comply with the provisions of Table 1. 4.2.2 Chopped basalt fibers of other specifications and dimensions can be produced upon negotiation between the supplier and the purchaser.5 General Requirements5.1 The products included in this Document shall not cause harm to humans, organisms and the environment; and shall comply with the relevant standards and specifications for safety and environmental issues related to production and use. 5.3 The appearance of chopped basalt fiber shall be golden brown. 5.4 Chopped basalt fiber shall be used in accordance with the specific dosage provided by the manufacturer. The mixing method of the test concrete or mortar during construction shall be carried out in accordance with the mixing method provided in the instructions of the test product.6 Technical Requirements6.1 Appearance quality The chopped basalt fiber has uniform color and no surface pollution. 6.2 Dimension deviation 6.3 Performance index of chopped basalt fiber 6.3.1 The performance index of chopped basalt fiber shall meet the requirements of Table 2. Table 2 – Performance index of chopped basalt fiber 6.4 Performance index of cement concrete and mortar mixed with chopped basalt fiber The performance index of cement concrete and mortar mixed with chopped basalt fibers shall meet the requirements of Table 3.7 Test Method7.1 Appearance quality Normal illumination, distance 0.5m, visual inspection. 7.2 Dimension deviation 7.3 Performance index test of chopped basalt fiber 7.3.1 Tensile strength The tensile strength of the plied yarn fiber shall be measured according to the method specified in Appendix A; and the tensile strength of the strand fiber shall be measured according to the method specified in Appendix B. 7.4 Performance test of cement concrete and mortar mixed with chopped basalt fiber 7.4.1 Test environment The test shall be carried out indoors at a temperature of 20℃±5℃. The raw materials for mixing concrete or mortar shall be transported indoors in advance and the storage time shall be no less than 24h. 7.4.2 Test materials 7.4.2.1 Cement Cement with a P•O42.5 shall comply with the provisions of GB 175. 7.4.2.2 Sand Medium sand with a mud content of less than 1% shall comply with the provisions of GB/T 14684. 7.4.3.1 Concrete The mix ratio of the reference concrete and the test concrete shall be designed according to JGJ 55 and shall comply with the following provisions. 7.4.3.2 Mortar The mass mix ratio of cement, sand and water in the reference mortar is. 1.1.5.0.5.The mass mix ratio of cement, sand and water in the test mortar is. 1.1.5.0.5; and the chopped basalt fiber is the recommended dosage of the test fiber provided by the client. 7.4.3.3 Measuring and mixing of concrete and mortar The measuring and mixing of concrete and mortar shall comply with the following provisions. 7.4.4 Test piece preparation, curing and number of specimens required for testing 7.4.4.1 Concrete test piece preparation and curing shall be carried out in accordance with GB/T 50081; and the standard curing age of hardened concrete or mortar is 28 days. The test items and the number of required test pieces are detailed in Table 4. 7.4.4.2 During the test, three batches of concrete or mortar for testing one type of fiber shall be completed on the same day. 7.4.5 Concrete and mortar crack reduction factor The concrete and mortar crack reduction factor test of shall be carried out in accordance with Appendix E of GB/T 21120-2018. 7.4.6 Hardened concrete and mortar 7.4.6.4 Concrete impact strength ratio The concrete impact strength ratio is measured according to Appendix G of GB/T 21120-2018.8 Inspection Rules8.1 Exit-factory inspection 8.1.1 Exit-factory inspection items It includes appearance, size, density, moisture content, and combustible matter content. 8.2 Type inspection 8.2.1 Type inspection conditions Type inspection shall be carried out in any of the following situations. a) When the new product or old product is transferred to the factory for trial production and identification; 8.2.2 Type inspection items It includes all technical requirements in Clause 6. 8.2.3 Batching rules The same as 8.1.2. 8.2.4 Sampling and sample retention Take the batch as a unit. The sampling quantity of each batch is 2kg of Type-S fiber and 10kg of Type-T fiber. Each batch of samples is divided into two equal portions, one is inspected according to the specified items; and the other is sealed and kept for half a year in preparation for re-inspection or arbitration.9 Marking, Exit-Factory, Packaging, Transportation and Storage9.1 Marking The following content shall be marked on all packages in a prominent position. product name, mark, net mass, manufacturer name, factory address, production date, this Document number, etc. If there is a trademark, it shall be marked on the product package. Labor protection tips shall be specially marked on the packaging. 9.2 Exit-factory 9.2.2 The manufacturer shall provide product instructions with the goods, which shall include product name and model, exit-factory date, main characteristics, scope of application and recommended dosage, storage conditions, usage methods and precautions. 9.3 Packaging, transportation and storage ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 23265-2023 be delivered?Answer: The full copy PDF of English version of GB/T 23265-2023 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 23265-2023_English with my colleagues?Answer: Yes. 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