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Engineering Construction Standard Full Text Information System
Ministry of Construction of the People's Republic of China Standard
Concrete Mixing Water Standard
1989 Beijing
Engineering Construction Standard Full Text Information System
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Ministry of Construction of the People's Republic of China Standard
Concrete Mixing Water Standard
JGL63-89
Editor China Academy of Building Research||tt ||Approving Department Ministry of Construction of the People's Republic of China Implementation Date October 1, 1989
Engineering Construction Standards Full Text Information System
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Notice on the Release of the Ministry Standard "Standard for Mixing Water for Concrete"
(89)建标字第153号
"Standard for Mixing Water for Concrete" has been reviewed and approved by our Ministry as a Ministry Standard, with the serial number JG63-89, and will be implemented from October 1, 1989. If you have any questions or comments during the implementation process, please inform the main editor of this standard, China Academy of Building Research. This standard is published by China Architecture & Building Press and distributed by Xinhua Bookstores in various places. Ministry of Construction of the People's Republic of China
March 29, 1989
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Preparation Instructions
This standard is prepared by the China Academy of Building Research in conjunction with the Beijing Municipal Design Institute and the Beijing First Component Factory in accordance with the requirements of the Notice No. 263 of the former Ministry of Urban and Rural Construction and Environmental Protection (86).
During the preparation process, relevant domestic and foreign standards and a large amount of water quality data and scientific research results in my country were widely collected. After repeated discussions and soliciting opinions from relevant units across the country, the Ministry organized the review and finalization.
This standard consists of six chapters and two appendices. The main contents include: general principles, types of water used in concrete mixing; technical requirements; sampling; test methods, results and evaluation, etc. In the process of implementing this standard, please pay attention to accumulating data, summarizing experience and sending opinions and relevant data to the Building Materials Institute of China Academy of Building Research for future revisions.
Ministry of Construction of the People's Republic of China
March 29, 1989
Engineering Construction Standard Full Text Information System
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Chapter 1
Types of water for concrete mixing
Chapter 2
Chapter 3
1 Technical requirements
Chapter 4 Sampling...
Chapter 5
Test methods
Chapter 6
Appendix 2
Appendix 3
Results and evaluation
Test method for water quality of concrete mixing water·Test table for concrete mixing water
Explanation of terms used in this code.
Additional explanation
List of the editorial unit,
Participating units and main drafters of this standard2
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Chapter 1 General
Article 1.0.1 This standard is formulated to control the quality of concrete mixing water and ensure that the various technical properties of concrete meet the requirements for use. Article 1.0.2 This standard applies to ordinary concrete mixing water for industrial and civil buildings and general structures. The various indicators and test methods in the standard are used to determine whether water with unknown or suspicious properties is suitable for mixing concrete. A
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Chapter 2 Types of Concrete Mixing Water
Article 2.0.1 Concrete mixing water can be divided into drinking water, surface water, groundwater, seawater, and industrial wastewater after proper treatment or disposal according to the water source. Article 2.0.2 Drinking water that meets national standards can be mixed with various concretes.
Article 2.0.3 Surface water and groundwater shall be inspected in accordance with the provisions of this standard before first use.
Article 2.0.4 Seawater may be used to mix plain concrete, but shall not be used to mix reinforced concrete and prestressed concrete.
Concrete with finishing requirements shall not be mixed with seawater. Article 2.0.5 Washing water from equipment in concrete production plants and commercial concrete plants may be used as part of the water for mixing concrete. However, attention shall be paid to the effects of the cement and admixture types contained in the washing water on the mixed concrete, and the content of chloride, sulfate and sulfide in the final mixing water shall meet the requirements of Article 3.0.4. Article 2.0.6 Industrial wastewater may be used to mix concrete after passing the inspection, otherwise it must be treated and can only be used after passing the inspection. Engineering Construction Standard Full Text Information System
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Chapter 3 Technical Requirements
Article 3.0.1 The substances contained in mixing water should not have the following harmful effects on concrete, reinforced concrete and prestressed concrete: 1. Affect the workability and coagulation of concrete, 2. Impair the strength development of concrete;
3. Reduce the durability of concrete, accelerate the corrosion of steel bars and cause brittle fracture of prestressed steel bars;
4. Pollute the surface of concrete.
Article 3.0.2 The difference in initial setting time and final setting time of cement obtained by testing water to be tested and distilled water (or drinking water that meets national standards) shall not be greater than 30 minutes.
The initial setting and final setting time shall still meet the requirements of national cement standards. Article 3.0.3 The 28d compressive strength of cement mortar or concrete prepared with water to be tested (if there is an early compressive strength requirement, the 7d compressive strength shall be increased) shall not be less than 90% of the compressive strength of the corresponding mortar or concrete mixed with distilled water (or drinking water that meets national standards).
Article 3.0.4 The pH value, insoluble matter, soluble matter, chloride, sulfate and sulfide content of water shall meet the requirements of Table 3.0.4. Material content limit
Insoluble matter mg/L
Soluble matter mg/L
Chloride (as CI-) mg/L
Sulfate (as SOF-) mg/L
Sulfide (as S-) mg/L
Prestressed concrete
<50000
Reinforced concrete
Plain concrete
<10000
①The chloride content of prestressed concrete using steel wire or heat-treated steel bars shall not exceed 350mg/L. Engineering Construction Standard Full Text Information System
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Chapter 4 Collection
Article 4.0.1 The collected water samples should be representative. Well water, borehole water and tap water samples should be collected after flushing the pipes or removing the accumulated water. Water samples from rivers, lakes and reservoirs should generally be collected at the center or 300 to 500 mm below the surface of the frequently flowing water. Attention should be paid to preventing human pollution during collection. Article 4.0.Article 2 The container for collecting water samples should be thoroughly cleaned in advance, and then rinsed three times with the water sample to be collected before collecting the water sample. After the water sample is collected, it should be covered with wax seal to keep it in its original state.
Article 4.0.3 When collecting water samples, attention should be paid to the influence of season, climate and rainfall, and it should be noted in the sampling record.
Article 4.0.4 The water sample for water quality analysis shall not be less than 5L. After the water sample is collected, it should be tested in time. The pH value is best determined on site. The water sample for sulfide determination should be specially collected and fixed on site according to the provisions of the test method. All water quality test items should be completed within 7 days.
Article 4. 0. 5 The water sample for determining cement setting time shall not be less than 1L, the water sample for determining mortar strength shall not be less than 2L; the water sample for determining concrete strength shall not be less than 15L.
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Chapter 5 Test Methods
Article 5.0.1 The setting time difference test should use the water to be tested and distilled water (or drinking water that meets national standards) as mixing water respectively. According to the current national standard "Test Methods for Water Consumption, Setting Time and Stability of Cement Standard Consistency", the initial and final setting times of the same cement shall be determined, and the final setting time difference and the initial setting time difference shall be calculated. Article 5.0.2 The compressive strength ratio test of mortar shall use the water to be tested and distilled water (or drinking water that meets national standards) as mixing water, and make a group of mortar specimens of the same cement according to the current national standard "Test Method for Cement Mortar Strength", measure the compressive strength at a specified age, and calculate the compressive strength ratio. The compressive strength ratio test of concrete shall use the water to be tested and distilled water (or drinking water that meets national standards) as mixing water, and make a group of concrete cube specimens with strength grades ranging from 20 to C30 according to the current national standard "Test Method for Mechanical Properties of Concrete" using the same raw materials and the same mix ratio, measure the compressive strength at a specified age, and calculate the compressive strength ratio.
If the test results do not meet the requirements of Article 3.0.3, resampling is allowed, and the number of test specimens is doubled for retesting. The lower group average value of the two groups of test specimens during retesting shall be used as the basis for evaluation.
Article 5.0.3 The inspection of the content of various substances in water can be carried out by the relevant methods in Appendix 1 "Water Quality Inspection Methods for Concrete Drainage Water". If other methods are used, their accuracy and precision should not be lower than the corresponding methods mentioned above. Engineering Construction Standard Full Text Information System
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Chapter VI Results and Evaluation
Article 6.0.1 Drinking water, seawater and washing water of concrete factories that meet national standards can be used in accordance with the provisions of Chapter 2. Water from other sources shall be subjected to chemical analysis and coagulation (mortar) test at the same time, and its applicability shall be determined according to Articles 3.0.2, 3.03 and 3.0.4. Article 6.0.2: Compile the test report based on the test results of water for concrete mixing! The test report shall include the following contents: 1. Water source and sampling location; 2. Water type; 3. Sampling date; 4. Test date; 5. Name of laboratory, test analyst, auditor and test supervisor: wood, water appearance; 7. pH value, insoluble matter, soluble matter, chloride, sulfate and sulfide content of water; 8. Setting time difference; 9. Compressive strength ratio; 10. Conclusion and opinion.
The inspection report form is shown in Appendix II
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Appendix I Water Quality Inspection Method for Mixing Water for Concrete, pH Value (Glass Electrode Method)
(I) Overview
This method uses a glass electrode as an indicator electrode and a saturated calomel electrode as a reference electrode, and uses a pH meter (acidometer) calibrated with a pH standard buffer solution to directly determine the pH value of the water sample.
(II) Instruments
1. pH meter (acidometer): The measurement range is 0~14pH, and the reading accuracy is not less than 0.05pH unit.
pH glass electrode, saturated calomel electrode.
Beaker: 50mL.
Thermometer: 0~100℃.
(Three reagents
The following reagents should be prepared with freshly boiled and cooled pure water, and the prepared solutions should be stored in polyethylene bottles or hard glass bottles. Such solutions should be used within 1 to 2 months.
1pH standard buffer A: Weigh 10.21g of potassium hydrogen phthalate (KHCHO4) that has been dried at 110℃ for 2h and cooled to room temperature, dissolve it in pure water, and make up to 1000ml. The pH value of this solution is 400 at 20℃. 2pH standard buffer B: Weigh 3.40Og of potassium dihydrogen phosphate (KH2PO4) and 3.55g of disodium hydrogen phosphate (Na2HPO4) that have been dried at 110℃ for 2h and cooled to room temperature, dissolve them in pure water, and make up to 1000ml. The pH value of this solution is 6.88 at 20℃.
3. pH standard grade buffer C: Weigh 3.81g borax (Na,B,O10H20), dissolve it in pure water, and make up to 1000mL. The pH value of this solution is in the engineering construction standard full text information system
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Chapter VI Results and Evaluation
Article 6.0.1 Drinking water, seawater and washing water of concrete factories that meet national standards can be used in accordance with the provisions of Chapter 2. Water from other sources should be subjected to chemical analysis and coagulation (mortar) tests at the same time, and its applicability should be determined in accordance with Articles 3.0.2, 3.03 and 3.0.4. www.bzxz.net
Article 6.0.2 Compile the inspection report based on the inspection results of concrete mixing water! The inspection report should include the following contents: 1. Water source and sampling location; 2. Water type; 3. Sampling date; 4. Test date; 5. Name of the test laboratory, test analyst, auditor and test supervisor; 6. Appearance of water; 7. pH value, insoluble matter, soluble matter, chloride, sulfate and sulfide content of water; 8. Setting time difference; 9. Compressive strength ratio; 10. Conclusions and opinions.
The inspection report form is shown in Appendix II
Engineering Construction Standards Full Text Information System
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Appendix I Water Quality Inspection Method for Mixing Water for Concrete, pH Value (Glass Electrode Method)
(I) Overview
This method uses a glass electrode as an indicator electrode and a saturated calomel electrode as a reference electrode, and uses a pH meter (acidometer) calibrated with a pH standard buffer solution to directly determine the pH value of the water sample.
(II) Instruments
1. pH meter (acidometer): The measurement range is 0~14pH, and the reading accuracy is not less than 0.05pH unit.
pH glass electrode, saturated calomel electrode.
Beaker: 50mL.
Thermometer: 0~100℃.
(Three reagents
The following reagents should be prepared with freshly boiled and cooled pure water, and the prepared solutions should be stored in polyethylene bottles or hard glass bottles. Such solutions should be used within 1 to 2 months.
1pH standard buffer A: Weigh 10.21g of potassium hydrogen phthalate (KHCHO4) that has been dried at 110℃ for 2h and cooled to room temperature, dissolve it in pure water, and make up to 1000ml. The pH value of this solution is 400 at 20℃. 2pH standard buffer B: Weigh 3.40Og of potassium dihydrogen phosphate (KH2PO4) and 3.55g of disodium hydrogen phosphate (Na2HPO4) that have been dried at 110℃ for 2h and cooled to room temperature, dissolve them in pure water, and make up to 1000ml. The pH value of this solution is 6.88 at 20℃.
3. pH standard grade buffer C: Weigh 3.81g borax (Na,B,O10H20), dissolve it in pure water, and make up to 1000mL. The pH value of this solution is in the engineering construction standard full text information system
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Chapter VI Results and Evaluation
Article 6.0.1 Drinking water, seawater and washing water of concrete factories that meet national standards can be used in accordance with the provisions of Chapter 2. Water from other sources should be subjected to chemical analysis and coagulation (mortar) tests at the same time, and its applicability should be determined in accordance with Articles 3.0.2, 3.03 and 3.0.4.
Article 6.0.2 Compile the inspection report based on the inspection results of concrete mixing water! The inspection report should include the following contents: 1. Water source and sampling location; 2. Water type; 3. Sampling date; 4. Test date; 5. Name of the test laboratory, test analyst, auditor and test supervisor; 6. Appearance of water; 7. pH value, insoluble matter, soluble matter, chloride, sulfate and sulfide content of water; 8. Setting time difference; 9. Compressive strength ratio; 10. Conclusions and opinions.
The inspection report form is shown in Appendix II
Engineering Construction Standards Full Text Information System
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Engineering Construction Standards Full Text Information System
Appendix I Water Quality Inspection Method for Mixing Water for Concrete, pH Value (Glass Electrode Method)
(I) Overview
This method uses a glass electrode as an indicator electrode and a saturated calomel electrode as a reference electrode, and uses a pH meter (acidometer) calibrated with a pH standard buffer solution to directly determine the pH value of the water sample.
(II) Instruments
1. pH meter (acidometer): The measurement range is 0~14pH, and the reading accuracy is not less than 0.05pH unit.
pH glass electrode, saturated calomel electrode.
Beaker: 50mL.
Thermometer: 0~100℃.
(Three reagents
The following reagents should be prepared with freshly boiled and cooled pure water, and the prepared solutions should be stored in polyethylene bottles or hard glass bottles. Such solutions should be used within 1 to 2 months.
1pH standard buffer A: Weigh 10.21g of potassium hydrogen phthalate (KHCHO4) that has been dried at 110℃ for 2h and cooled to room temperature, dissolve it in pure water, and make up to 1000ml. The pH value of this solution is 400 at 20℃. 2pH standard buffer B: Weigh 3.40Og of potassium dihydrogen phosphate (KH2PO4) and 3.55g of disodium hydrogen phosphate (Na2HPO4) that have been dried at 110℃ for 2h and cooled to room temperature, dissolve them in pure water, and make up to 1000ml. The pH value of this solution is 6.88 at 20℃.
3. pH standard grade buffer C: Weigh 3.81g borax (Na,B,O10H20), dissolve it in pure water, and make up to 1000mL. The pH value of this solution is in the engineering construction standard full text information system
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