GB/T 200-2017 (GBT 200-2017)

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GB/T 200-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
Q 11
Replacing GB/T 200-2003
Moderate-heat portland cement, low-heat portland cement
ISSUED ON. DECEMBER 29, 2017
IMPLEMENTED ON. NOVEMBER 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Composition and materials ... 6 
5 Code name and strength grade ... 6 
6 Technical requirements ... 6 
7 Test methods ... 9 
8 Inspection rules ... 9 
9 Exit-factory, delivery, and acceptance ... 11 
10 Packing, marking, transport, and storage ... 12 
Appendix A (Normative) Calculation of mineral composition ... 13 
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 200-2003 “Moderate Heat Portland Cement Low
Heat Portland Cement Low Heat Port”. As compared with GB/T 200-2003, the
main changes of this Standard are as follows.
- The standard’s name is changed to “Moderate-heat portland cement, low-
heat portland cement”;
- Changed from the mandatory standard to the recommended standard;
- DELETE the variety of “low heat port”;
- DELETE the industrial by-product gypsum and Class A natural gypsum in
“gypsum”, and the “grinding aid” under “Composition of low heat port” (SEE
Chapter 4; 4.1, 4.4, and 4.5 of the 2003 version);
- ADD Class M natural gypsum (SEE 4.3; 4.4 of the 2003 version);
- ADD the strength grade 32.5 low-heat portland cement (SEE Chapter 5);
- ADD technical requirements for insoluble matters in cement (SEE 6.1.4);
- ADD technical requirements for tricalcium aluminate, tricalcium silicate, and
dicalcium silicate in cement, as selection indexes (SEE 6.3);
- ADD the technical requirement of 90 d compressive strength for low-heat
portland cement, as a type inspection item (SEE 6.4.5);
- MODIFY the calculation formula for mineral composition (SEE Appendix A;
4.2.3 of the 2003 version).
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee
184 on Cement of Standardization Administration of China (SAC/TC 184).
Responsible drafting organizations of this Standard. China Building Materials
Academy, China Three Gorges Corporation.
Participating drafting organizations of this Standard. Guodian Dadu River
Hydropower Development Co., Ltd., Yalong River Hydropower Development
Company Ltd., Jiahua Special Cement Co., Ltd., Henan Tongli Cement Co.,
Ltd., Sichuan Jiahua Jinping Special Cement Co., Ltd., Dalian Cement Group
Moderate-heat portland cement, low-heat portland cement
1 Scope
This Standard specifies the terms and definitions, composition and materials,
code name and strength grade, technical requirements, test methods,
inspections rules, exit-factory, delivery and acceptance, packing, marking,
transport, and storage of moderate-heat portland cement (hereafter known as
moderate-heat cement for short) and low-heat portland cement (hereafter
known as low-heat cement for short).
This Standard applies to the production and application of moderate-heat
cement and low-heat cement.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the versions with the dates indicated are
applicable to this document. For the undated references, the latest version
(including all the amendments) are applicable to this document.
GB/T 176 Methods for chemical analysis of cement
GB/T 750 Method for soundness of portland cement
GB/T 1346 Test methods for water requirement of normal consistency,
setting time and soundness of the portland cement
GB/T 5483 Natural gypsum
GB/T 8074 Testing method for specific surface of cement - Blaine method
GB/T 9774 Sacks for packing cement
GB/T 12573 Sampling method for cement
GB/T 12959 Test methods for heat of hydration of cement
GB/T 17671 Method of testing cements - Determination of strength (ISO
method)
3 Terms and definitions
6.4.7 28 d heat of hydration of low-heat cement
The 28 d heat of hydration of low-heat cement of grade 32.5 shall not be more
than 290 kJ/kg. The 28 d heat of hydration of low-heat cement of grade 42.5
shall not be more than 310 kJ/kg.
7 Test methods
7.1 Calcium oxide, silicon dioxide, aluminum oxide, ferric oxide,
magnesium oxide, sulfur trioxide, loss on ignition, insoluble matter, free
calcium oxide, sodium oxide, and potassium oxide
Calcium oxide, silicon dioxide, aluminum oxide, ferric oxide, magnesium oxide,
sulfur trioxide, loss on ignition, insoluble matter, free calcium oxide, sodium
oxide, and potassium oxide are tested according to GB/T 176.
7.2 Tricalcium aluminate, tricalcium silicate, and dicalcium silicate in
clinker or cement
The tricalcium aluminate, tricalcium silicate, and dicalcium silicate in clinker or
cement shall be calculated according to Appendix A.
7.3 Specific surface
The specific surface shall be tested according to GB/T 8074.
7.4 Setting time and boiling soundness
Setting time and boiling soundness shall be tested according to GB/T 1346.
7.5 Autoclave soundness
Autoclave soundness shall be tested according to GB/T 750.
7.6 Strength
The strength shall be tested according to GB/T 17671.
7.7 Heat of hydration
Heat of hydration shall be tested according to GB/T 12959.
8 Inspection rules
8.1 Lot grouping and sampling
8.3.2 Type inspection
The product, of which the inspection results conform to the technical
requirements specified in 6.1 and 6.4, is qualified. The product, of which the
inspection results do not conform to any of the technical requirements of 6.1
and 6.4, is unqualified.
8.4 Inspection report
The content of inspection report shall include at least the cement variety,
strength grade, various technical requirements specified in this Standard, and
test results. The manufacturer shall, within 11 d from the date of delivery of
cement, send the test results specified except for the 28 d strength. The 28 d
strength value, within 32 d from the date of delivery of cement, shall be reported.
9 Exit-factory, delivery, and acceptance
9.1 Exit-factory
Only when it is confirmed that all technical indexes and packing quality of
cement meet the requirements, can the cement leave the factory.
9.2 Delivery and acceptance
9.2.1 At the time of delivery, the quality acceptance of cement can be based on
the inspection result of the physical sample drawn; or can be based on the
inspection report of the same lot number of cement of the manufacturer. The
acceptance method adopted shall be agreed between the buyer and the seller
and be specified in the contract or agreement. The seller has the responsibility
of informing the buyer of the acceptance method. When there is no written
contract or agreement, or no acceptance method is specified in the contract or
agreement, the seller shall indicate on the invoice that “the inspection report of
the same lot number of cement of the factory is the acceptance basis”.
9.2.2 When the inspection result of the physical sample drawn is taken as the
acceptance basis, the buyer and the seller shall, before delivery or at the place
of delivery, jointly sample and seal. The sampling method shall be in
accordance with GB/T 12573. The sampling quantity is 28 kg, divided into two
equal parts. One part shall be kept by the seller for 40 d; and the other part shall
be inspected by the buyer in accordance with the items and methods specified
in this Standard.
Within 40 d, when the buyer, by inspection, believes that the product quality
does not meet the requirements of this Standard, and the seller has objections,
the two parties shall send another sample kept by the seller to a qualified testing