JG/T 223-2017 PDF in English
JG/T 223-2017 (JG/T223-2017, JGT 223-2017, JGT223-2017)
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Polycarboxylates high performance water-reducing admixture
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JG/T 223-2017: PDF in English (JGT 223-2017) JG/T 223-2017
JG
BUILDING INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
Q 12
Replacing JG/T 223-2007
Polycarboxylates high performance
water-reducing admixture
ISSUED ON. MAY 27, 2017
IMPLEMENTED ON. DECEMBER 01, 2017
Issued by. Ministry of Housing and Urban Rural Development of PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification and marking ... 6
5 Requirements ... 7
6 Test methods ... 11
7 Inspection rules ... 12
8 Product specification and certificate, packaging ... 14
9 Exit-factory, transportation and storage... 15
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces JG/T 223-2007 “Polycarboxylates high performance
water-reducing admixture”. As compared to JG/T 223-2007, the main technical
changes are as follows.
- ADJUST the code of polycarboxylates high performance water-reducing
admixture;
- MODIFY the type of Polycarboxylates high performance water-reducing
admixture; DELETE the “non-retarded type” and “classified by product
grade”; ADD the early-strength type, slow-release type, reduced type and
antifreeze type, GIVE the technical indicator requirements for various type
products;
- ADD the ammonia release index; ADJUST such indicators as formaldehyde
content and chloride ion content, and so on;
- ADD the tested concrete index of the newly added type of water-reducing
admixture; ADJUST the tested concrete index of some original products;
- MODIFY the requirements for test items and the number of test pieces.
This standard was proposed by the Standard Rating Institute of the Ministry of
Housing and Urban-Rural Development.
This standard shall be under the jurisdiction of the Standardization Technical
Committee for Building Products and Components of the Ministry of Housing
and Urban-Rural Development.
Drafting organizations of this standard. China Academy of Building Research,
China Building Materials Science Research Institute, Jiangsu Subote New
Materials Co., Ltd., Guangdong Red Wall New Materials Co., Ltd., Jiangsu
Zhongtie OLET New Materials Co., Ltd., Shanghai Building Science Research
Institute (Group) Co., Ltd., Shenzhen Weihai Building Materials Co., Ltd.,
Kezhijie New Materials Group Co., Ltd., BASF Chemical Building Materials
(China) Co., Ltd., Beijing University of Technology, Liaoning Cologne Fine
Chemical Co., Ltd., Tianjin Feilong Concrete Admixture Co., Ltd., Tongji
University, Zhejiang Wulong New Material Co., Ltd., Shandong Huawei Yinkai
Building Materials Technology Co., Ltd., China Metallurgical Construction
Research Institute Co., Ltd., Beijing Construction Engineering Quality First
Testing Institute Co., Ltd., Guangdong Rui'an Technology Industrial Co., Ltd.,
Shenzhen Maidi Concrete Admixture Co., Ltd.
Polycarboxylates high performance
water-reducing admixture
1 Scope
This standard specifies the terms and definitions, classification and marking,
requirements, test methods, inspection rules, product specifications and
certificates, packaging, exit-factory, transportation and storage of
polycarboxylates high performance water-reducing admixture which is used in
concrete.
This standard applies to polycarboxylates high performance water-reducing
admixture for cement concrete.
2 Normative references
The following documents are essential to the application of 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) are applicable to this standard.
GB 8076 Concrete admixture
GB/T 8077 Methods for testing uniformity of concrete admixture
GB 18588 Limit of ammonia emitted from the concrete admixtures
GB 31040 Limit of residual formaldehyde from the concrete admixtures
GB/T 50080 Standard for test method of performance on ordinary fresh
concrete
JGJ 52 Standard for gravel and stone quality and test methods for ordinary
concrete
JGJ 55 Test method for the crawler crane structures
JG/T 377 Anti-freezing and pumping admixtures for concrete
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Polycarboxylates high performance water-reducing admixture
The water-reducing admixture which uses the polymer, that is synthesized
from a carboxyl-unsaturated monomer and other monomers, as a parent.
3.2
Reference concrete
Concrete which is prepared without adding water-reducing agent and
subjected to standard curing.
3.3
Tested concrete
Concrete which is added with polycarboxylates high performance water-
reducing admixture and is cured under specified temperature and humidity
conditions.
3.4
Tested concrete curing in standard condition
Concrete which is prepared as specified, added with polycarboxylates high
performance water-reducing admixture, cured under specified temperature
conditions.
3.5
Tested concrete curing at negative temperature
Concrete which is prepared as specified, added with the tested antifreeze
polycarboxylates high performance water-reducing admixture, cured under
specified temperature conditions.
4 Classification and marking
4.1 Classification
4.1.1 The classification by product type is as shown in Table 1.
reducing admixture to be tested.
5.1.2 Mix ratio
In accordance with JGJ 55, perform the mix ratio design for the reference
concrete. The ratio of cement, gravel, and aggregate for the tested concrete
and the reference concrete is same. The design of mix ratio shall comply with
the following provisions.
- Cement consumption. 360 kg/m3;
- Gravel ratio. 43% ~ 47%;
- Dosage of polycarboxylates high performance water-reducing admixture.
Use the dosage as specified by the manufacturer of polycarboxylates high
performance water-reducing admixture;
- Water consumption. The initial slump of the tested concrete which is added
with slow-release admixture shall be controlled at (120 ± 10) mm; the initial
slump of the tested concrete which is added with other types of products
shall be controlled at (210 ± 10) mm; the initial slump of the reference
concrete shall be controlled at (210 ± 10) mm; the water consumption is the
minimum water consumption when the initial slump of the reference
concrete and the tested concrete reaches the corresponding control value;
the water consumption includes the water which is contained in the water-
reducing admixture, gravel, and aggregate material.
5.1.3 Concrete mixing
It is performed in accordance with the provisions of GB 8076.
5.1.4 Production of specimens
The production of concrete specimens which is added with antifreeze product
shall be carried out in accordance with the provisions of JG/T 377. The
preparation of concrete specimens which is added with other types of products
shall be carried out in accordance with the provisions of GB 8076.
5.1.5 Test items and number of specimens
The number of test items and the number of specimens is shown in Table 3.
It is performed in accordance with the provisions of GB 18588.
6.2 Concrete performance
6.2.1 Water reduction ratio, bleeding rate ratio, difference of set time and
shrinkage ratio
The test methods of the water reduction ratio, bleeding rate ratio, difference of
set time and shrinkage ratio shall meet the following requirements.
- The water reduction ratio test of the polycarboxylates high performance
water-reducing admixture is carried out in accordance with the provisions
of GB 8076, the initial slump of the tested concrete which is added with the
slow-release product is controlled at (120 ± 10) mm, meanwhile the 1 h, 2
h, and 3 h slump loss over time shall comply with the requirements of Table
4;
- The bleeding rate ratio, the difference of set time, and the shrinkage ratio
are tested in accordance with the provisions of GB 8076.
6.2.2 Gas content, slump, slump loss over time
It is performed in accordance with the provisions of GB/T 50080.
6.2.3 Compressive strength ratio
The test method for the compressive strength ratio shall meet the following
requirements.
- The compressive strength ratio test of antifreeze products is carried out in
accordance with the provisions of JG/T 377;
- The compressive strength ratio test of other types of products is carried out
in accordance with the provisions of GB 8076.
6.2.4 Strength loss ratio after 50 freeze-thaw
It is performed in accordance with the provisions of JG/T 377.
7 Inspection rules
7.1 Inspection classification
7.1.1 Exit-factory inspection
The exit-factory inspection items shall include formaldehyde content, chloride
ion content, total alkali content, solid content, moisture content, density,
fineness, pH value. The chloride ion content is tested at least once every 3
inspection.
7.3 Judgment rules
7.3.1 Judgment of exit-factory inspection
If the type inspection qualified report is within the validity period, the exit-factory
inspection result meets the requirements of Table 4, this batch of products is
judged to be qualified.
7.3.2 Judgement of type inspection
The qualification judgement for the product’s type inspection shall meet the
following requirements.
a) The product has been tested and the homogeneity test results shall
comply with the requirements of Table 4;
b) All concrete performance index’s test results of antifreeze products shall
meet the requirements of Table 5, Table 6 and clause 5.4;
c) Except that the difference of set time in the concrete performance index of
other types of product is used as the reference index, the test results of
other performance indicators shall comply with the requirements of Table
5 and clause 5.4.
7.4 Re-inspection
The re-inspection is carried out by using the retained sample. If the user
organization requires on-site sampling, it shall be specified in the supply
contract in advance. Take the mixed sample on site in the presence of the
personnel of production and user organization. The re-inspection shall be
carried out in accordance with the type inspection items.
8 Product specification and certificate, packaging
8.1 Product specification
It shall provide the product specification when the product is exit-factory. The
product specification shall include at least the following contents.
a) The name of the manufacturer;
b) The name and type of the product;
c) The product performance characteristics, main components and technical
indicators;
d) The scope of application;
e) The recommended dosage;
f) Storage conditions and validity period, the validity period is calculated from
the date of production, which is specified by the enterprise itself in
accordance with the product performance;
g) The methods of use, precautions, safety precautions, etc.
8.2 Certificate
It shall provide the product certificate when the product is delivered. The product
certificate shall include at least the following contents.
a) The product name;
b) The date of manufacture and batch number;
c) The name and address of the production unit;
d) The conclusions of exit-factory inspection;
e) Enterprise’s quality inspection seal or quality inspection personnel’s
signature, code.
8.3 Packaging
Powder products can be packaged in woven bags or paper bags lined with
plastic bags, or other packaging that can be agreed upon by the supplier and
the purchaser; liquid products can be contained in plastic containers or in tank
cars. The packaging containers shall be indicated of the product name and type,
implemented standard number, trademark, net mass, production unit’s name
and validity period in an obvious position.
9 Exit-factory, transportation and storage
9.1 Exit-factory
The contents of the cargo-accompanied technical documents provided by the
manufacturer include. product specification, certificate, inspection report. Under
one of the following conditions, it shall not exit factory.
a) The technical documents (product specifications, certificates, inspection
reports) are incomplete;
b) The packaging is inconsistent;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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