This standard is the first industry standard for soil stabilizers. This standard specifies the terminology, product classification and code, technical requirements, test methods, inspection rules, packaging, marking, storage and transportation requirements of soil stabilizers. This standard applies to the production, inspection and use of soil stabilizers mainly prepared with inorganic salts. CJ/T 3073-1998 Soil Stabilizer CJ/T3073-1998 Standard download decompression password: www.bzxz.net

CJ/T3073-1998 Urban Construction Industry Standard of the People's Republic of China
Soil stabilizer
Issued on June 30, 1998
Implemented on December 1, 1998
Ministry of Construction of the People's Republic of China
CJ/T30731998
Cited standards
Product classification and code
Technical requirements
Test methods
86069600006056060666000860
Inspection rules
98088900888
Packaging, marking, storage, transportation
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CJ/T3073—1998
This standard is the first industrial standard for soil stabilizers. This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is managed by the Beijing Municipal Engineering Design and Research Institute, the technical unit responsible for urban road and bridge standards of the Ministry of Construction.
This standard was drafted by Dalian Mac Culture Science and Industry Co., Ltd. (the main contracting unit), Dalian University of Technology, and Dalian Municipal Administration and Repair Facilities Research Institute. The main drafters of this standard are Ding Congyi, Cao Yongmin, Zhu Ruxian, Xue Qian, Han Fengjuan, Yan Bolin, Jiang Xingguo, Chang Di, and Tang Yi.
This standard is interpreted by Dalian Mac Culture Science and Industry Co., Ltd. Urban Construction Industry Standard of the People's Republic of China Soil stabilizer
Soil stabilizer
1 Scope
CJ/T3073—1998
This standard specifies the terminology, product classification and code, technical requirements, test methods, inspection rules, packaging, marking, storage, and transportation requirements of soil stabilizers. This standard applies to the production, inspection, and use of soil stabilizers prepared mainly with inorganic salts.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB175-92 Portland cement, ordinary Portland cement GB1344-92 Slag Portland cement, pozzolanic Portland cement and fly ash Portland cement
GB134591 Cement fineness test method (80m sieve analysis method) GB80761997 Concrete admixture
GB807787 Concrete admixture homogeneity test method 2 Construction quicklime powder
JC/T479-92|| tt||JC/T481—92
Building slaked lime powder
JTJ034—93
JTJ057—94
Technical specification for highway pavement base construction
Test procedure for inorganic binder stabilized materials for highway engineering Approved by the Ministry of Construction of the People's Republic of China on June 30, 1998 and implemented on December 1, 1998
3 Terminology
This standard adopts the following terms.
3.1 Soil stabilizer
Any material that can improve and enhance the technical properties of soil is called soil stabilizer. 3.2 Liquid-powder soil stabilizer
A solution prepared from inorganic salts, a liquid or powder material that can improve and enhance the technical properties of soil by adding an appropriate amount of cement, lime and fly ash to the soil on site is called liquid-powder soil stabilizer.
3.3 Powdered soil stabilizer
Mixed materials that are evenly mixed with powdered inorganic salts, cement, lime and fly ash and added to the soil to improve and enhance the technical properties of the soil are called powdered soil stabilizers. 4 Product classification and code
4.1 Product classification
Liquid powdered soil stabilizer and powdered soil stabilizer. 4.2 Code
Liquid powdered soil stabilizer
5 Technical requirements
5.1 Fineness of powdered soil stabilizer
Powdered soil stabilizer
The fineness of powdered soil stabilizer is 0.074mm. The residue on the standard sieve shall not exceed 15%.
Solid content of liquid powdered soil stabilizer
The solid content of the solution in the liquid powdered soil stabilizer shall not be greater than 3%, and there shall be no precipitation or flocculent phenomenon.
5.3 Setting time
When the curing agent is added to the soil, the initial setting time should be greater than 4h when the construction is carried out under the optimum moisture content. That is, the solidified soil mixture is left for 4h to make test specimens, and the loss of compressive strength is not greater than 10%.
5.4 Stability
After the solidified soil specimens are steamed at 65℃ for 24h, they are naturally cooled in the steaming box, and there shall be no cracks on the surface of the specimens.
5.5 Unconfined compressive strength
The unconfined compressive strength of the solidified soil is designed according to the mixture composition of JTJ034 and the specimens made according to the test method of JTJ057. The 7-day compressive strength shall not be lower than the value in Table 1. Table 1 Curing and compressive strength standards
Subbase
Curing agent categoryWww.bzxZ.net
Cement
Lime
Cement and lime
Lime and fly ash
Powdered curing agent
Cement
Lime
Cement and lime
Lime and fly ash
Powdered curing agent
Road grade
Urban expressway and city Trunk roads
Urban secondary roads and branch roads
The values ​​listed in the table refer to the strength of 7 days standard curing 6 days and 1 day of immersion) 1
2For cement-lime mixtures, if the cement content is the main content, the compressive strength standard is the same as the strength standard of cement mixtures; if the lime content is the main content, the compressive strength standard is the same as the strength standard of lime mixtures; if the cement and lime content are similar, the value between cement and lime is taken.
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5.6 Raw materials
5.6.1 According to GB175 and GB1344 standards, ordinary Portland cement, slag cement, fly ash cement and volcanic ash Portland cement above No. 325 can be used. 5.6.2 Lime quicklime powder should comply with the provisions of JC/T479, and slaked lime powder should comply with the provisions of JC/T481.
5.6.3 Fly ash shall comply with the relevant provisions of JTJ034. 5.6.4 Inorganic salts shall comply with the relevant provisions of GB8076. 6 Test methods
6.1 Compaction test of solidified soil
Perform according to JTJ057 (T0804)
6.2 Test of solidified unconfined compressive strength
Perform according to JTJ057 (T0805).
6.3 Setting time test of solidified soil
6.3.1 Purpose and scope of application
This test method is applicable to setting time tests of various types of solidified soil. 6.3.2 Instruments and equipment
The instruments and equipment are the same as those of JTJ057.
6.3.3 Preparation of test materials
The test equipment is the same as that of 6.2 of this standard.
6.3.4 Preparation of test specimens
a) Number of test specimens: For the mixture with the same curing agent ratio, the number of test specimens of the same shape (i.e. the number of parallel tests) to be prepared shall be at least 12. 6 Method of preparing test specimens: The time of mixing the solidified soil mixture from the time of adding water is recorded. After mixing evenly, 6 test specimens are immediately formed (the forming method is the same as that in 6.2 of this standard). The remaining half of the solidified soil mixture is covered with a wet cloth, left for 4 hours, and then 6 test specimens are formed. ?The curing of the test specimens is the same as that in 6.2 of this standard. 6.3.5 Test steps
a) Take out the test specimens that have been cured for 6 days and immerse them all in a water tank. The water level is 2.5cm higher than the top surface of the test specimens. The immersion time is 24 hours.
b Carry out unconfined compressive strength tests on the above two groups of test specimens to obtain the average compressive strength of each group of test specimens.
6.3.6 The calculation formula of the setting time influence coefficient is shown in formula (1): Rm
Where: - setting time influence strength coefficient, (1)
R - compressive strength of the molded specimen after the solidified soil mixture is left for 4 hours, MPa, R - compressive strength of the solidified soil specimen MPa.
6.4 Solidification main stability test
8.4.1 The purpose and scope of application, instruments and equipment, sample preparation, specimen preparation method and requirements of this test method are the same as those in 6.2 of this standard, and the number of specimens is at least 6. 6.4.2 Test steps
a) Take out the 6 specimens that have been cured for 1 day and put them into the steam curing box for steaming: b) Control the temperature of the steam curing box at 65℃, start recording the time, steam for 24 hours, turn off the heating switch, and let the specimens cool naturally in the steam curing box: d) Take out the 6 specimens and check whether there are cracks and peeling on the surface of the specimens. 6.5 Determination of solid content in liquid soil solidifier The determination of solid content in the solution shall be carried out in accordance with GB8077.6 Determination of fineness of powdered curing agent
The determination of fineness of powdered curing agent shall be carried out in accordance with GB1345. 7 Inspection rules
7.1 Numbering and sampling
For the same formula and the same production process, every 200t of powdered soil curing agent is sampled as one number, and every 10t of liquid powdered soil curing agent solution is sampled as one number. Each numbered sample is divided into two parts, one of which is made into a test piece according to the requirements of 5.5 of this standard for testing, and the other is sealed and stored in case of doubt and submitted to the cutting department for re-inspection. The storage time is generally half a year. 7.2 Product delivery
Products shall not be shipped if any of the following conditions occur: a) There is no product number and performance test certificate; b) The packaging is unqualified and the quality (weight) is insufficient;? The product has been damp and deteriorated and has exceeded the validity period. 8. Packaging, marking, storage, and transportation
8.1 Packaging container
The liquid powder soil solidifier solution is packaged in barrels and tank trucks, and the powder soil solidifier is packaged in bags or bulk cement tank trucks. 8.2 Marking
All packaging containers used should indicate the following information in a conspicuous position: registered trademark, product name, model and weight, manufacturer name, factory address, production date and factory number. When in bulk, a card with the above information should be submitted. 8.3 Storage and transportation
8.3.1 During storage and transportation, different types of soil solidifiers should be stored and transported separately, and they should not be mixed or exposed to moisture.
8.3.2 The validity period of bagged powder soil solidifier is six months, and the stacking height should not exceed 12 bags: the validity period of barreled liquid powder soil solidifier solution is one year, and it should not be inverted.
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