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Position: Chinese Standard in English/GB/T 27690-2023
GB/T 27690-2023   Silica fume for cement mortar and concrete (English Version)
Standard No.: GB/T 27690-2023 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 7500 words Price(USD):225.0 remind me the price change

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Implemented on:2023-10-1 Delivery: via email in 1~3 business day
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Standard No.: GB/T 27690-2023
English Name: Silica fume for cement mortar and concrete
Chinese Name: 砂浆和混凝土用硅灰
Chinese Classification: Q12    Cement composite material and additives
Professional Classification: GB    National Standard
ICS Classification: 91.100.10 91.100.10    Cement. Gypsum. Lime. Mortar 91.100.10
Issued by: SAMR; SAC
Issued on: 2023-03-17
Implemented on: 2023-10-1
Status: valid
Superseding:GB/T 27690-2011 Silica fume for cement mortar and concrete
Language: English
File Format: PDF
Word Count: 7500 words
Price(USD): 225.0
Delivery: via email in 1~3 business day
This standard is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document replaces GB/T 27690-2011 Silica fume for cement mortar and concrete. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 27690-2011: a) The term and definition of silica fume slurry have been deleted (see Clause 3 of 2011 edition); b) The terms and definitions of non-densified silica fume and densified silica fume have been added (see Clause 3); c) The classification of silica fume by silicon dioxide content and bulk density has been added, and the classification of silica fume by service state has been deleted (see Clause 4 hereof; Clause 4 of 2011 edition); d) The technical requirements for silica fume bulk density and residue on 45μm square-hole sieve have been added (see Clause 5); e) The technical requirements for Grade 90 silica fume have been added (see Clause 5); f) The technical requirements for silica fume slurry have been deleted (see Clause 5 of 2011 edition); g) The technical requirements for loss on ignition, total alkali content and chloride ion content of silica fume have been modified (see Clause 5 hereof; Clause 5 of 2011 edition); h) The test methods for bulk density and residue on 45μm square-hole sieve have been added (see Clause 6 and Annex A); i) The test method for solid content has been deleted (See Clause 6 and Annex A of 2011 edition); j) The requirements for water reducers for chloride ion penetration resistance tests and water reducers for activity index tests have been modified (see Clause 6 and Annex B hereof; Clause 6 and Annex B of 2011 edition); k) The batch number and end-of-manufacturing inspection items have been modified (see Clause 7 hereof; Clause 7 of 2011 edition); Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee on Cement Products of Standardization Administration of China (SAC/TC 197). This document was firstly issued in 2011; and this edition is the first revision. Silica fume for cement mortar and concrete 1 Scope This document specifies the classification and designation, requirements, test methods, inspection rules, packaging, labeling, transportation and storage of silica fume for cement mortar and concrete. This document applies to silica fume for cement mortar and concrete. 2 Normative reference The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 176 Methods for chemical analysis of cement GB/T 1345 The test sieving method for fineness of cement GB/T 2419 Test method for fluidity of cement mortar GB 6566 Limits of radionuclides in building materials GB 8076 Concrete admixtures GB/T 17671 Test method of cement mortar strength (ISO method) GB/T 19587 Determination of the specific surface area of solids by gas adsorption using the BET method GB/T 50082 Standard for test methods of long-term performance and durability of ordinary concrete JC/T 681 Mixer for mixing mortars JGJ 63 Standard of water for concrete 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 silica fume powder material with amorphous silicon dioxide as the main component, which is obtained by collecting the silicon vapor discharged from the flue, when smelting ferrosilicon alloy or silicon metal 3.2 non-densified silica fume silica fume with bulk density of not more than 350 kg/m3, which is obtained by collecting directly without densification 3.3 densified silica fume silica fume with bulk density of more than 350 kg/m3 after the non-densified silica fume is densified 4 Classification and designation 4.1 Product classification 4.1.1 The product may be classified by silicon dioxide content into Grade 85 silica fume (Code: SF85) and Grade 90 silica fume (Code: SF90). 4.1.2 It may also be classified by bulk density into non-densified silica fume (Code: R) and densified silica fume (Code: D). 4.2 Product designation Product designation consists of the classification codes of silicon dioxide content and bulk density and the standard number. For example, the designation of Grade 90 densified silica fume is as follows: SF90-D GB/T 27690.
Foreword i 1 Scope 2 Normative reference 3 Terms and definitions 4 Classification and designation 5 Requirements 6 Test methods 7 Inspection rules 8 Packaging, labeling, transportation and storage Annex A (Normative) Test method for bulk density Annex B (Normative) Test methods for water demand ratio and activity index Annex C (Normative) Test method for inhibiting alkali-aggregate reactivity
Referred in GB/T 27690-2023:
*GB/T 176-2017 Methods for chemical analysis of cement
*GB/T 1345-2005 The Test Sieving Method for Fineness of Cement
*GB/T 2419-2005 Test Method for Fluidity of Cement Mortar
*GB 6566-2010 Limits of radionuclides in building materials
*GB 8076-2008 Concrete Admixtures
*GB/T 17671-2021 Test method of cement mortar strength(ISO method)
*GB/T 19587-2017 Determination of the specific surface area of solids by gas adsorption using the BET method
*GB/T 50082-2009 Standard for test methods of long-term performance and durability of ordinary concrete
*JC/T 681-2022 Mixer for mixing mortars
*JGJ 63-2006 Standard of Water for Concrete
GB/T 27690-2023 is referred in:
*GB/T 40399-2021 General technical conditions for precast concrete part of prefabricated construction
Code of China
Standard
GB/T 27690-2023  Silica fume for cement mortar and concrete (English Version)
Standard No.GB/T 27690-2023
Statusvalid
LanguageEnglish
File FormatPDF
Word Count7500 words
Price(USD)225.0
Implemented on2023-10-1
Deliveryvia email in 1~3 business day
Detail of GB/T 27690-2023
Standard No.
GB/T 27690-2023
English Name
Silica fume for cement mortar and concrete
Chinese Name
砂浆和混凝土用硅灰
Chinese Classification
Q12
Professional Classification
GB
ICS Classification
Issued by
SAMR; SAC
Issued on
2023-03-17
Implemented on
2023-10-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 27690-2011 Silica fume for cement mortar and concrete
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
225.0
Keywords
GB/T 27690-2023, GB 27690-2023, GBT 27690-2023, GB/T27690-2023, GB/T 27690, GB/T27690, GB27690-2023, GB 27690, GB27690, GBT27690-2023, GBT 27690, GBT27690
Introduction of GB/T 27690-2023
This standard is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document replaces GB/T 27690-2011 Silica fume for cement mortar and concrete. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 27690-2011: a) The term and definition of silica fume slurry have been deleted (see Clause 3 of 2011 edition); b) The terms and definitions of non-densified silica fume and densified silica fume have been added (see Clause 3); c) The classification of silica fume by silicon dioxide content and bulk density has been added, and the classification of silica fume by service state has been deleted (see Clause 4 hereof; Clause 4 of 2011 edition); d) The technical requirements for silica fume bulk density and residue on 45μm square-hole sieve have been added (see Clause 5); e) The technical requirements for Grade 90 silica fume have been added (see Clause 5); f) The technical requirements for silica fume slurry have been deleted (see Clause 5 of 2011 edition); g) The technical requirements for loss on ignition, total alkali content and chloride ion content of silica fume have been modified (see Clause 5 hereof; Clause 5 of 2011 edition); h) The test methods for bulk density and residue on 45μm square-hole sieve have been added (see Clause 6 and Annex A); i) The test method for solid content has been deleted (See Clause 6 and Annex A of 2011 edition); j) The requirements for water reducers for chloride ion penetration resistance tests and water reducers for activity index tests have been modified (see Clause 6 and Annex B hereof; Clause 6 and Annex B of 2011 edition); k) The batch number and end-of-manufacturing inspection items have been modified (see Clause 7 hereof; Clause 7 of 2011 edition); Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee on Cement Products of Standardization Administration of China (SAC/TC 197). This document was firstly issued in 2011; and this edition is the first revision. Silica fume for cement mortar and concrete 1 Scope This document specifies the classification and designation, requirements, test methods, inspection rules, packaging, labeling, transportation and storage of silica fume for cement mortar and concrete. This document applies to silica fume for cement mortar and concrete. 2 Normative reference The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 176 Methods for chemical analysis of cement GB/T 1345 The test sieving method for fineness of cement GB/T 2419 Test method for fluidity of cement mortar GB 6566 Limits of radionuclides in building materials GB 8076 Concrete admixtures GB/T 17671 Test method of cement mortar strength (ISO method) GB/T 19587 Determination of the specific surface area of solids by gas adsorption using the BET method GB/T 50082 Standard for test methods of long-term performance and durability of ordinary concrete JC/T 681 Mixer for mixing mortars JGJ 63 Standard of water for concrete 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 silica fume powder material with amorphous silicon dioxide as the main component, which is obtained by collecting the silicon vapor discharged from the flue, when smelting ferrosilicon alloy or silicon metal 3.2 non-densified silica fume silica fume with bulk density of not more than 350 kg/m3, which is obtained by collecting directly without densification 3.3 densified silica fume silica fume with bulk density of more than 350 kg/m3 after the non-densified silica fume is densified 4 Classification and designation 4.1 Product classification 4.1.1 The product may be classified by silicon dioxide content into Grade 85 silica fume (Code: SF85) and Grade 90 silica fume (Code: SF90). 4.1.2 It may also be classified by bulk density into non-densified silica fume (Code: R) and densified silica fume (Code: D). 4.2 Product designation Product designation consists of the classification codes of silicon dioxide content and bulk density and the standard number. For example, the designation of Grade 90 densified silica fume is as follows: SF90-D GB/T 27690.
Contents of GB/T 27690-2023
Foreword i 1 Scope 2 Normative reference 3 Terms and definitions 4 Classification and designation 5 Requirements 6 Test methods 7 Inspection rules 8 Packaging, labeling, transportation and storage Annex A (Normative) Test method for bulk density Annex B (Normative) Test methods for water demand ratio and activity index Annex C (Normative) Test method for inhibiting alkali-aggregate reactivity
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Keywords:
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