| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JG 237-2008 | English | 439 |
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Mould for concrete specimens
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JG 237-2008
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PDF similar to JG 237-2008
Basic data | Standard ID | JG 237-2008 (JG237-2008) | | Description (Translated English) | Mould for concrete specimens | | Sector / Industry | Building & Construction Industry Standard | | Classification of Chinese Standard | Q13 | | Classification of International Standard | 91.100.30 | | Word Count Estimation | 11,134 | | Date of Issue | 2008-11-13 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | JG 3019-1994 | | Quoted Standard | GB/T 700; GB/T 2828.1; GB/T 9439; GB/T 50081; JGJ 52 | | Regulation (derived from) | Bulletin of the Ministry of Housing and Urban No. 149 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China | | Summary | This standard applies to concrete test mold design, production and quality inspection. This standard does not apply to ambient temperature at 10��C ~ 30��C construction site outside the plastic used tryout. | JG 237-2008: Mould for concrete specimens---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Book industry standards for the construction industry of the People's Republic of China
Replacing JG 3019-1994
Concrete test mode
2008-11-13 release
2009-03-01 Implementation
People's Republic of China Ministry of Housing and Urban - Rural Development
Foreword
5.1, 5.2, 5.3, 5.4 of this standard are mandatory and the rest are recommended.
This standard is a revision of JG 3019-1994 "concrete test mode".
The main technical differences between this standard and JG 3019-1994 are as follows.
--- increase the scope of application of plastic mold. "This standard does not apply to the ambient temperature of 10 ℃ ~ 30 ℃ outside the site site use
The plastic mold. ";
--- test model classification is modified as follows. according to the production of materials, according to the shape of classification, according to the form of sealing, according to the form of connection classification, according to specifications classification;
--- the principle of the construction of the test made a principle requirements; to determine the strength of the concrete grade 150mm × 150mm × 150mm cube
Standard test mode, in Appendix A gives the specific structural requirements;
--- the increase in the production of plastic mold used by the requirements of the material "used to produce engineering plastic test mode, the thermal expansion coefficient shall not exceed
Over 50 × 10-6/℃, according to the relevant provisions of GB/T 50081 forming concrete specimens, the test model should not be deformed.
--- increase the round of the body and the cylinder test mode and some commonly used prism test mode specifications;
- the angle between the adjacent sides of the test mode allows the error to increase from 0.3 ° to 0.2 °. Increased cylindrical test plate and cylinder
The angle between the axis of the error requirements;
--- After the test module assembly, the gap between the connecting surface is increased from 0.2mm to 0.1mm; the gap between the test module and the side plate is increased by 0.4mm
To 0.1mm; the flatness error of the positioning surface is increased from 0.06mm to 0.04mm;
- in the durability requirements, provides that "in the case of normal use, the test should be used at least 50 times or when using less than 50 times
Use period of at least 6 months of the request ";
--- for all test mode, increased water leakage requirements and test methods;
--- on the plastic test mode, increased by adding a single grained gravel test to test its durability;
--- on the seal test mode, increased the shape of the seal after immersion in tap water pH changes of not more than 0.3 requirements;
--- to amend the inspection rules, inspection rules with reference to GB/T 2828.1 regulations;
- Revoke Appendix A concrete seal test, insert the technical contents into the appropriate provisions.
Appendix A of this standard is a normative appendix.
This standard is proposed by the Institute of Standards and Valuation of the Ministry of Housing and Urban-Rural Development.
This standard by the Ministry of Housing and Urban and Rural Construction Engineering Standard Technology focal point of China Building Science Research Institute.
The drafting of this standard. China Building Science Research Institute, Hunan Province Construction Engineering Corporation, Tongji University, Hunan Provincial Department of Construction Technology
Technology Promotion Center, Hunan University, China Railway Research Institute, Hebei North Construction Equipment Manufacturing Co., Ltd., Shanghai Civil Defense Construction Project
Quality Supervision and Inspection Center, Henan Province, Ruyang County Construction Bureau.
The main drafters of this standard. Rong Junming, Zhou Haibing, cold light, Li Qiling, Xu Changduo, Tian Guanfei, Gong Jianqing, Wang Yuehua, Guo Xiujiang,
Yu Kai Yang, Han Tie Ma.
This standard is replaced by JG 3019-1994 from the date of implementation.
Concrete test mode
1 Scope
This standard specifies the classification, specifications and marking of concrete test molds, construction and materials, requirements, test methods, inspection, rules, signs, packages
Equipment, transportation and storage.
This standard applies to the design, production and quality inspection of concrete molds.
This standard does not apply to the ambient temperature in the 10 ℃ ~ 30 ℃ outside the site of the use of plastic mold.
2 normative reference standard
The terms of the following documents are incorporated by reference in this standard as the terms of this standard. Any reference to the date of the document, the subsequent repair
(Not including the contents of the errata) or the revised version shall not apply to this standard. However, it is encouraged whether the parties to reach an agreement under this standard
The latest version of these files can be used. For undated references, the latest version of this document applies to this standard.
GB/T 700 carbon structural steel
GB/T 2828.1 Counting inspection procedures Part 1. Batch inspection sampling plan for inspection by quality limit (AQL)
GB/T 9439 gray cast iron pieces
Standard for test methods for mechanical properties of ordinary concrete GB/T
Standard for Sand, Stone Quality and Test Method for Ordinary Concrete
Classification, specification and marking
3.1 Classification
3.1.1 Classification by production material
a) cast iron or cast steel test mode, symbol. default;
b) plastic mold, symbol. S.
3.1.2 Classification by shape
a) cube test mode, symbol. LF;
b) prism test mode, symbol. LZ;
c) round table test mode, symbol. YT;
d) cylindrical test mode, symbol. YZ.
3.1.3 Classification by seal
a) not sealed test mode; symbol. default;
b) sealed test mode, symbol. K.
3.1.4 Classification by connection
a) a single test, symbol. default;
b) triple test mode, symbol. 3.
3.2 Specifications
The specifications of the concrete mold shall conform to the provisions of Table 1.
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