GB 18445-2001 Cement-based penetrating crystalline waterproof material
Some standard content:
GB 18445--2001
Items 6 to 8 in Table 2 of Chapter 5 and items 3, 7, and 8 in Table 3 of this standard are mandatory, and the rest are recommended. There is no similar product standard abroad that can be used as a reference. When formulating this standard, on the basis of experimental research and verification, the product's texture index and physical and mechanical properties were specified with reference to standards such as JC474-1999 "Mortar and Concrete Waterproofing Agent" and GB8076---1997 "Concrete Admixture". The "second impermeability pressure" is used to indicate the impermeability of this material after water permeation and self-healing in the impermeability test. This standard was proposed by the State Administration of Building Materials Industry. This standard is under the jurisdiction of the National Technical Committee for Standardization of Lightweight and Decorative Building Materials. The responsible drafting units of this standard are: Standardization Institute of the State Administration of Building Materials Industry, School of Materials Science and Engineering, Tongji University. The drafting units of this standard include: Shanghai Jicheng Dashen Waterproof Material Co., Ltd., Beijing Chengrong Waterproof Material Co., Ltd., Kunshan Kaidun Baisen High-efficiency Waterproof Material Co., Ltd., Shanghai Huiqi Industrial Development Co., Ltd., Hong Kong Dongwei Enterprise Co., Ltd., Urumqi Gust Waterproof Material Co., Ltd., Shanghai Huibang Special Coating Co., Ltd., and Beijing Jinyuhua Science and Trade Co., Ltd. The main drafters of this standard include: Yang Bin, Zhang Yongming, Xue Shaozu, Fang Yicang, Bai Bin, Jin Nengchun, Li Meilin, Cao Jiande, Li Ming, Chen Jialin, and Gao Jianqiu.
This standard is published for the first time.
National Standard of the People's Republic of China
Cementitious capillary crystalline waterproofing materials
Cementitious capillary crystalline waterproofing materialsGB 18445--2001
This standard specifies the definition, classification, technical requirements, test methods, inspection rules, packaging, transportation and storage of cementitious capillary crystalline waterproofing materials (abbreviated as: CCCW).
This standard applies to cement-based permeable crystalline waterproof materials made of silicate cement or ordinary silicate cement, quartz sand, etc. as the base material and mixed with active chemical substances.
2 Referenced standardsbZxz.net
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. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1346-2001 Test method for water consumption, setting time and stability of cement standard consistency GB8076--1997 Concrete admixtures
GB/T8077-2000 Test method for homogeneity of concrete admixtures GB/T17671--1999 Test method for strength of cement mortar (ISO method) (idtISO679:1989) GBJ81-1985 Test method for mechanical properties of ordinary concrete GBJ82~1985 Test method for long-term performance and durability of ordinary concrete JC4741999 Mortar and coagulant waterproofing agent
JTI270-1998 Test procedure for concrete in water transport engineering 3 Definitions
This standard adopts the following definitions:
3.1 Cement-based penetrating crystalline waterproof material
Cement-based penetrating crystalline waterproof material is a rigid waterproof material. After reacting with water, the active chemical substances contained in the material penetrate into the concrete through the carrier, forming water-insoluble crystals in the concrete, filling the capillary channels, and thus making the concrete dense and waterproof. 3.1.1 Cement-based penetrating crystalline waterproof coating Cement-based penetrating crystalline waterproof coating is a powdery material that can be mixed with water to form a slurry that can be brushed or sprayed on the surface of cement concrete; it can also be sprinkled as dry powder and pressed into the surface of cement concrete that has not been completely solidified. 3.1.2 Cement-based penetrating crystalline waterproofing agent
Cement-based penetrating crystalline waterproofing agent is a powdery material mixed into the concrete. 3.2 Second impermeability pressure
The second impermeability pressure refers to the impermeability pressure measured by placing the test piece in water for 28 days after the first impermeability test and then conducting the second impermeability test.
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on September 4, 2001 - iKAoNiKAca -
Implemented on March 1, 2002
4 Classification
4.1 According to the method of use:
4.1.1 Cement-based penetrating crystalline waterproof coating (C) 4.1.2 Cement-based penetrating crystalline waterproof agent (A) GB 18445-2001
4.2 Cement-based penetrating crystalline waterproof coating is divided into two types, Type 1 and Type Ⅱ, according to physical and mechanical properties. 4.3 Marking
Arranged in the order of product name, type, model, and standard number. Marking example: "Type cement-based penetrating crystalline waterproof coating is marked as: CCCw c
5 Technical requirements
5.1 Homogeneity index
Homogeneity index shall comply with the provisions of Table 1.
GB 18445
Homogeneity index
Test items
Water content
Total alkali content (Naz0+0.65K20)
Chloride ion content
Fineness (0.315mm sieve)
Note: The manufacturer's control value should be informed to the user in the product manual. Physical and mechanical properties of cement-based penetrating crystalline waterproof coatings 5.2
The performance of the tested coatings shall comply with the provisions of Table 2. Index
Should be within 5% of the relative amount of the manufacturer's control valueShould be within 10% of the relative amount of the manufacturer's control valueTable 2 Physical and mechanical properties of the tested coatings
Test itemsMonth
Stability
Setting time
Flexural strength, MPa
Anti-K strength, MPa
Wet base surface bonding strength .MPa
Impermeability pressure (28d) .MPa
Initial setting time, min
Final setting time, h
Secondary impermeability pressure (56d), MPa
Permeability ratio (28)%
Performance index
GB18445.--2001
5.3 Physical and mechanical properties of cement-based penetrating crystalline waterproofing agent The performance of concrete mixed with waterproofing agent shall comply with the provisions of Table 3. Table 3 Physical and mechanical properties of concrete mixed with waterproofing agent Sequence
6 Test method
6.1 Homogeneity
Water reduction rate, %
Test items
Water secretion ratio, %
Compressive strength ratio
Air content, %
Setting time difference
Shrinkage ratio (28 d), %
Permeability pressure ratio (28d), %
Initial setting, min
Final setting, min
Second impermeability pressure (56d), MPa
Corrosion effect on steel bars
Performance index
No corrosion damage to steel bars
Homogeneity test is carried out in accordance with GB/T8077. Alkali content is carried out in accordance with Appendix D of GB8076-1997. 6.2 Tested Coating performance
6.2.1 Raw materials for test
Cement, sand and gravel for concrete, mixing water should comply with the provisions of GB8076, and sand for mortar should comply with the IS() standard sand specified in GB/T17671.
6.2.2 Mixing ratio
6.2.2.1 The mixing ratio of the benchmark concrete is determined by the 28d impermeability pressure of 0.3MPa~0.4MPa, and the cement dosage should not be less than 250 kg/m2.
6.2.2.2 The coating dosage shall be the dosage recommended by the manufacturer. 6.2.3 Concrete mixing
Use a 601. self-falling concrete mixer or one that can meet the mixing requirements. All materials are added at once, and the mixing amount should not be less than 1/4 of the rated mixing amount of the mixer. Mix for 3 minutes, and after discharging, turn it over manually on the iron plate for 2~~3 times before testing. All concrete materials and test environment temperatures should be maintained at (20 ± 5) °C. 6.2.4 Specimen preparation and number of specimens required for testing 6.2.4.1 Concrete specimen preparation and curing shall be carried out in accordance with GBJ81, but the concrete pre-curing temperature is (20 ± 3) °C. 6.2.4.2 Coating specimen curing: The coating concrete is cured in water with a depth of 3/4 of the specimen height (the coating surface is not immersed in water), and the water temperature is (20 ± 3) °C.
6.2.4.3 Test items and required quantities are shown in Table 4. 381
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Test items
Stability
Setting time
Flexural/compressive strength
Adhesion strength
Impenetration resistance
Test category
Coating body
Mixture
Coating body
Mixture
Coating body
Hardened material
Coating body
Hardened material
Coating concrete
Hardened material
6.2.5 Setting time, stability
GB 18445-2001
Test items and number of specimens
Number required for test
Concrete (mortar)
Number of mixing batches
Coating body
Number of mixing batches
Sampling for each batch
Benchmark concrete
Coating concrete
Total number of samplings for coating body
Total number of samplings
The test shall be carried out in accordance with the provisions of GB1346, and the water requirement for setting time shall be based on the water requirement recommended by the manufacturer. Total number of samplings| |tt||6.2.6 Compressive strength and flexural strength
According to (GB/T17671. The amount of sample and water used shall be in accordance with the recommended amount by the manufacturer. Mechanical or manual mixing can be used, but the mixing must be uniform. The molding test mold uses a 40mm×40mm×160mm triple mold, and 2 groups are molded each time. After molding, the specimen is moved to a standard curing room for curing, demolded after 1 day, and continued to be cured under standard conditions, but not immersed in water. The test age is 7d and 28d, and the test results are calculated in accordance with GB/T17671.
6.2. 7 Bond strength
The test was conducted in accordance with the provisions of Appendix A7 of JTJ270--1998. The benchmark mortar ratio was cement: sand: water 1:2:0.5. During molding, a piece of iron sheet was embedded in the middle of the 8-shaped mold, and it was naturally divided into two 0-shaped test pieces after hardening. The benchmark mortar test piece was demoulded after molding and curing for 1 day, and then placed in (20±3)°C water for curing for 3 days before use. The benchmark mortar 0-shaped test piece was placed in half of the tensile test mold with a release agent on the surrounding wall, and then the coating material was mixed and placed in the other half of the "8\" mold. It was tamped 6 times with a tamping rod. Before it initially set, use a scraper to remove more The remaining slurry is scraped off. After scraping, it is moved to the standard curing box for curing for 1 day. After demoulding, it is placed in the standard curing room for curing. The bonding strength test age is 28 days. 6.2.8 Anti-seepage performance
6.2.8.1 According to the provisions of GBJ82, the benchmark concrete specimens are formed, left to stand for 1 day and demoulded. The two ends of the specimens are brushed with a wire brush to remove oil stains, clean and remove water, so that the surface is in a saturated surface dry state. According to the recommended dosage and coating ratio of each manufacturer, the slurry is mixed and applied twice. Generally, manual stirring is adopted. After stirring evenly, it is applied to the surface of the treated concrete specimen with a brush. After the first application, the second application is carried out when the coating is dry to the touch. After the second application, it is moved to the standard push curing room for curing for 3 days and then immersed in water for curing according to the provisions of 6.2.4.2.
6.2.8.2 The benchmark specimens and the coating specimens are cured under the same conditions. 6.2.8.3 The test surface is the back water surface of the concrete and the initial pressure of the coating specimen is 0.4MPa. 6.2.8.4 The maximum seepage pressure of concrete is the maximum water pressure when 4 specimens in each group of 6 specimens do not seep water. The seepage pressure ratio is calculated as follows:
Where: S. - seepage pressure ratio, %,
Maximum seepage pressure of coating concrete, MPa; S_
S Maximum seepage pressure of reference concrete, MPa. 382
X 100%
（1）
GB 18445—2001
6.2.8.5 The second seepage pressure is to carry out the first seepage test on all 6 specimens until they are all permeable. After demoulding, continue to immerse in water and maintain for 28 days according to the provisions of 6.2.4.2. Then, test according to 6.2.8.3 until the third test piece is permeable. The pressure at this time minus 0.1MPa is recorded as the second anti-seepage pressure.
6. 3 Performance of waterproofing agent
6.3.1 The raw materials used in the test shall comply with the provisions of GB8076. 6.3.2 See Table 5 for test items and quantities.
Table 5 Test items and number of test pieces
Number of test pieces required
Test items
Bleeding rate ratio
Water reduction rate
Difference in setting time
Compressive strength ratio
Breathing pressure ratio
Shrinkage ratio
Reinforcement corrosion
Test category
Concrete mixture
Concrete alternative
Concrete mixture
Hardened concrete
Hardened concrete
Concrete mixture
Hardened concrete
Newly mixed or hardened mortar
Total number of batches of concrete samples
Number of samples for each batch
Concrete with waterproofing agent
Total number of samples
Benchmark concrete
Total number of samples
6.3.3 The mix design and mixing of the benchmark concrete and the inspected concrete shall comply with the provisions of JC474 and GB8076. The amount of waterproofing agent shall be based on the recommended amount of each manufacturer. The concrete for the impermeability test shall adopt a mix ratio with a slump of (180±10) mm. 6.3.4 The water reduction rate ratio, water seepage rate ratio, setting time, compressive strength ratio, air content, and shrinkage ratio shall be carried out in accordance with the provisions of GB8076. 6.3.5 The impermeability performance shall be carried out in accordance with the provisions of GBJ82. The seepage pressure ratio shall be calculated in accordance with 6.2.8.4. The second impermeability pressure shall be carried out in accordance with the provisions of 6.2.8.5.
6.3.6 The corrosion of steel bars shall be carried out in accordance with Appendix C of GB8076-1997. 7 Inspection rules
7.1 Batch and sampling
7.1.1 Batch
50t of the same type and model is a batch, and less than 50t is also counted as one batch. One batch is one number. 7.1.2 Sampling
Random sampling can be carried out 10 times at a certain time interval when the product is packaged, or it can be carried out randomly at 10 different locations after packaging. Each sampling of cement-based penetrating crystalline waterproof coating is 10kg + cement-based penetrating crystalline waterproof agent. Each sampling volume is not less than 0.2t of cement required for the additional dosage. After sampling, it should be fully mixed and divided into two, one for testing according to the standard; the other is sealed and stored for one year for re-inspection or arbitration.
7.2 Inspection classification
7.2.1 Factory inspection
CCCWC: Inspect the anti-seepage pressure in Table 1 and Table 2. CCCWA: Inspect the seepage pressure ratio in Table 1 and Table 3. 7.2.2 Type inspection
Includes all items in the technical requirements of Chapter 5. Type inspection should be carried out in any of the following situations: a) Trial design and identification of new products:
iKANniKAca-
GB18445--2001
b) After formal production, if there are major changes in materials and processes that may affect product performance; c) During normal production, inspection should be carried out at least once a year; d) After the product is discontinued for years and when production is resumed; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 7.3 Judgment rules
After the product is inspected, if all performance indicators meet the technical requirements of this standard, the batch of products is judged to be qualified; if one performance indicator does not meet the standard requirements, it is allowed to re-sample and inspect in the same batch. If the test results all meet the standard requirements, the batch of products is judged to be qualified; otherwise, the batch of products is judged to be unqualified.
8 Packaging, marking, transportation and storage
8.1 Packaging
The product can be packed in bags or barrels. Moisture-proof packaging bags must be used when bagging. 8.2 Marking
The following contents should be clearly indicated on the packaging container: product name, mark, net weight, manufacturer name, production date, batch number, etc.
8.3 Product delivery
The product must have a certificate of conformity when it leaves the factory. When the user needs it, the homogeneity index test report and the anti-seepage pressure or osmotic pressure ratio test report shall be sent within 7 days from the date of product delivery, and the report shall be supplemented within 40 days. The product should be accompanied by an instruction manual. The product manual should include product performance and ingredients, applicable scope, recommended dosage and recommended admixture, usage precautions and construction and maintenance methods, etc. 8.4 Transportation and storage
8.4.1 During transportation and storage, products should be stacked separately according to product type and model, and should not be mixed to prevent moisture. 8.4.2 Products should be stored in accordance with 8.4.1 Under the transportation and storage conditions, the storage period is one year from the date of production. Expired products should be re-inspected to meet the standards before use.
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