This standard is formulated to unify the basic terms of geotechnical engineering investigation for building and urban construction and to facilitate scientific and technological cooperation and exchange in this discipline. This standard is applicable to geotechnical engineering investigation, design, construction monitoring, scientific research and teaching for building and urban construction projects. Other civil engineering projects may also refer to JGJ/T 112-1997 Technical Specification for Application of Natural Zeolite Powder in Concrete and Mortar JGJ/T112-97 JGJ/T112-1997 Standard Download Decompression Password: www.bzxz.net

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Industry Standard of the People's Republic of China
Natural Zeolite Powder in Concrete and Mortar
Technical Specification for Application of Natural Zeolite Powder in Concrete and Mortar JGJ/T112—97
1997 Beijing
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Industry Standard of the People's Republic of China
Natural Zeolite Powder in Concrete and Mortar
Technical Specification for Application of Natural Zeolite Powder in Concrete and Mortar MortarJGJ/T
112—97
Editing Unit: Qing
Approving Department: Ministry of Construction of the People's Republic of China Effective Date: June 1, 1998
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Notice on Issuing the Industry Standard "Technical Specification for the Application of Natural Zeolite Powder in Concrete and Mortar"
Construction Standard [1997] No. 322
Construction Committees (Construction Departments) of all provinces, autonomous regions, and municipalities directly under the Central Government, Construction Committees of independently planned cities, and relevant departments of the State Council:
In accordance with the requirements of the Ministry of Construction's Document No. Jianbiao [1993] 285, the "Technical Specification for the Application of Natural Zeolite Powder in Concrete and Mortar" edited by Tsinghua University has been reviewed and approved as a recommended industry standard, numbered JGJ/T112—97, and will be implemented on June 1, 1998.
This code is managed by the China Academy of Building Research and Mining Research, the unit responsible for building engineering standards and technology under the Ministry of Construction, and is specifically interpreted by the chief editor, Tsinghua University. This code is published by the Standard and Norms Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
November 24, 1997
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2 Acceptance and storage and transportation of zeolite powder
2.1 Acceptance requirements
2.2 Test methods
2.3 Transportation and storage
General provisions
4 Application of zeolite powder in concrete Use
4.1 Mix design
4.2 Mixing
4.3 Casting, molding and curing
4.4 Quality inspection
5 Application of zeolite powder in lightweight aggregate concrete5.1 Mix design
5.2 Mixing...
5.3 Transportation, casting, molding and curing
5.4 Quality inspection
6 Application of zeolite powder in mortar|| tt||6.1 Varieties and their application scope
The dosage of zeolite powder……
Mix proportion design
Construction and acceptance·
Appendix A
Appendix B
Appendix C
Appendix D
Determination method of ammonium absorption value
Determination method of water demand ratio of zeolite powder cement mortarDetermination method of 28d compressive strength ratio of zeolite powder cement mortarExplanation of terms used in this code
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Additional explanation
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1.0.1 This code is formulated in order to correctly and reasonably apply natural zeolite powder in concrete and mortar to improve performance, improve quality, save cement and reduce costs. 1.0.2
2This specification applies to the application of clinoptilolite powder and mortar zeolite powder in concrete and mortar.
When zeolite powder is used in concrete and mortar, in addition to complying with this specification, it shall also comply with the provisions of the relevant national standards in force. Engineering Construction Standards Full-text Information System
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2Acceptance and Storage and Transportation of Zeolite Powder
2.1Acceptance Requirements
2.1.1Zeolite powder shall be inspected on a batch basis, and its quality shall comply with the provisions of the current national standard "Natural Zeolite Powder for Concrete and Mortar". Each batch of zeolite powder shall have a factory certificate of conformity issued by the supplier, and the contents of the certificate shall include: factory name, certificate number, zeolite powder grade, batch number and factory date, zeolite powder quantity and quality inspection report, etc. 2.1.2 When sampling zeolite powder, 120t of the same grade of zeolite powder shall be considered as one acceptance batch. If the amount is less than 120t, it shall be counted as one batch.
2.1.3 The sampling of zeolite powder shall comply with the following provisions: 2.1.3.1 When sampling bulk zeolite powder, 10 samples shall be taken from different parts, each of which shall not be less than 1.0kg, and shall be mixed and stirred evenly, and the sample (referred to as the average sample) shall be reduced by the quartering method to be twice the amount required for the test. 2.1.3.2 When sampling bagged powder, 10 bags shall be randomly selected from each batch, and the sample from each bag shall not be less than 1.0kg, and the average sample shall be reduced according to the method specified in the above paragraph. 2.1.4 When one of the quality indicators of zeolite powder fails to meet the specified requirements, double sampling shall be taken from the same batch for re-inspection. If the requirements are still not met after re-inspection, the batch of zeolite powder shall be treated as unqualified products or downgraded. 2.2 Test methods
2.2.1 The zeolite content shall be determined in accordance with the provisions of Appendix A of this specification. 2.2.2 The fineness of zeolite powder shall be determined in accordance with the current national standard "Test Method for Cement Fineness (80um Water Sieve Analysis Method)" GB1345. 2.2.3 The water requirement ratio of cement mortar shall be determined in accordance with the provisions of Appendix B of this specification. 2.2.4 The compressive strength ratio of 28d cement mortar shall be tested in accordance with the provisions of Appendix C of this specification.
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2.3 Transportation and storage
2.3.1 When transporting and storing zeolite powder, it is strictly forbidden to mix it with other materials, and it should be stored in a ventilated and dry place without moisture.
2 The storage period of zeolite powder in a ventilated and dry place shall not exceed 2 years. Zeolite powder that exceeds the storage period of 2.3.2
shall be fully inspected in accordance with the provisions of Section 2.2 of this specification and can only be used when the results meet the requirements of the product standards. Zeolite powder that has become damp and agglomerated shall be crushed and inspected for fineness before use.
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3 General Provisions
3.0.1 Grade 1 zeolite powder should be used for concrete with a strength grade not less than C60. 3.0.2 Grade Ⅱ zeolite powder should be used for concrete with a strength grade less than C60. After special tests, it can also be used for concrete above C60. 3.0.3 Grade Ⅲ zeolite powder should be used for masonry mortar and plaster mortar. After special tests, it can also be used for concrete with a strength grade less than C60. 3.0.4 When preparing zeolite powder concrete and mortar, it is advisable to use silicate cement, ordinary silicate cement and slag silicate cement with a grade of 425 or above, and it is not advisable to use pozzolanic silicate cement, fly ash silicate cement and composite silicate cement. When the latter three types of cement are used, they should be determined by test.
3.0.5 Zeolite powder can be used with various admixtures at the same time. The adaptability and reasonable dosage of admixtures should be determined by test and should comply with the relevant provisions of the current national standard "Technical Specifications for the Application of Concrete Admixtures" GBJ119.
3.0.6 The strength grade of zeolite powder concrete and zeolite powder lightweight aggregate concrete shall not be lower than the strength grade of benchmark concrete and benchmark lightweight aggregate concrete. Their strength standard value, strength design value and elastic modulus should be the same as those of benchmark concrete and benchmark lightweight aggregate concrete.
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4 Application of Zeolite Powder in Concrete
4.1 Mix Design
4.1.1 The amount of zeolite powder added to concrete should replace cement by the equal replacement method, and its replacement rate should not exceed the provisions of Table 4.1.1. When the limit is exceeded, it should be determined by test. Replacement rate of zeolite powder replacing cement (%)
Concrete Strength Grade
C15~C30
C35~C45
Above C45
Portland Cement
Ordinary Portland Cement
Slag Portland Cement
The mix design of zeolite powder concrete should be based on the mix design of the benchmark concrete, and carried out by the equal replacement method according to the principle of equal consistency and equal strength grade. 4.1.3 The mix design steps of zeolite powder concrete can be carried out according to the following provisions: 4.1.3.1 The benchmark concrete mix design can be carried out according to the design requirements and the provisions of the current industry standard "Ordinary Concrete Mix Design Code" JGJ/T55; 4.1.3.2 The replacement rate of zeolite powder for cement should be selected according to the provisions of Article 4.1.1 of this code;
3 The water consumption of zeolite powder concrete should be appropriately increased according to the principle of equal consistency, and its consistency can also be adjusted by adding water reducer. When adding water reducing agent, the amount of water reducing agent should be calculated according to the percentage of total cementation;
4.1.3.4 The concrete mix ratio should be adjusted based on the calculated zeolite powder concrete mix ratio and trial mixing, on the basis of ensuring the workability and strength required by the design;
5 The zeolite powder concrete mix ratio for on-site use should be proposed based on the adjusted mix ratio. When there are special requirements for zeolite powder concrete, the mix ratio should also be adjusted accordingly.
4.2 Mixing
4.2.1 Measuring of zeolite powder (the allowable deviation by weight is mainly 2%). 4.2.2 After being measured, zeolite powder can be put into the mixer together with other components for mixing.
4.2.3 Zeolite powder concrete mixture should be mixed with a forced mixer. 4.2.4 Zeolite powder concrete mixture should be mixed evenly, and its mixing time should be extended by 30 to 60 seconds compared with the standard concrete mixture.
4.2.5 When sticking to the tank occurs, the two-time feeding method can be adopted, first putting in gravel Add part of the water and stir to make the cement mortar sticking to the tank wall fall off, then add sand, cement, zeolite powder and the remaining water and continue to stir evenly. 4.3 Casting, molding and curing
4.3.1 When casting zeolite powder concrete, vibration should not be missed or over-vibrated. No obvious zeolite powder slurry layer should appear on the surface of the vibrated zeolite powder concrete. When zeolite powder concrete is applied, it should be calendered twice.
4.3.2 The natural curing conditions of zeolite powder concrete should be the same as those of the benchmark concrete. Its curing time should not be less than that of the benchmark concrete. ||tt| |4.3.3 When constructing zeolite powder concrete in winter, the current national standard "Concrete Structure Engineering Construction and Acceptance Code" GB50204 shall be followed. 4.3.4 Steam-cured zeolite powder concrete shall comply with the following provisions: 4.3.4.1 The pre-curing temperature after molding should not be higher than 45℃; the pre-curing (static stop) time should not be less than 1h.
Zeolite powder concrete should be cured with high-temperature steam, and the constant temperature should be 4.3.4.2
95℃. The curing method should comply with the current national standard "Concrete Structure Engineering Construction and Acceptance Code". 4.4 Quality Inspection
4.4.1 The quality inspection of zeolite powder concrete shall comply with the relevant provisions of the current national standard "Concrete Structure Engineering Construction and Acceptance Code" GB50204. 4.4.2 During on-site construction, the consistency test of zeolite powder concrete mixture shall be measured at least twice per shift.
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4.4 Quality Inspection
4.4.1 The quality inspection of zeolite powder concrete shall comply with the relevant provisions of the current national standard "Concrete Structure Engineering Construction and Acceptance Code" GB50204. 4.4.2 During on-site construction, the consistency test of zeolite powder concrete mixture shall be measured at least twice per shift.
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