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National Standard of the People's Republic of China
CH/18488—2001
Acid-resisting bricks
Acid-resisting bricks and tiles2001-07-13 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on 2002-02-01
GB/T8488—7001
This standard is not a replacement for G8488-1%87 acid-resistant bricks. This standard adopts the physical technical indicators and test methods of this standard JISR1535·1991, and adjusts the original standard according to the actual situation of Chinese products.
This standard is a replacement for G343 —17 made the following changes. —A pair of brick classifications were revised. Bricks are divided into four types according to physical and chemical indicators: 7-1, 7-2, 7-3, and 7-4, of which 7-1 is a high-quality product. —The flexural strength, water absorption rate, stiffness, and rapid cooling and heating tests and methods were adjusted, supplemented, and improved. Among them, the bending strength test method excluded the requirement of 80mr between supports, and the test value of 4.9MPa was revised to (5=1)MPa/water absorption test method. The test value of the sample was revised from not less than 10m to cm~ 2em, and increased the constant weight requirement for the sample; the acid resistance test was revised from 10% sulfuric acid, hydrochloric acid and nicotinic acid 3:r:1. to 10% sulfuric acid, salt swelling and code equal volume mixture Taino chain 1CC with rapid cooling; in the thermal test, the mold release requirement for the sample was increased, the individual requirements for the water rate were specified, the size difference of the bricks was adjusted, and the inspection rules were revised. From the date of implementation of this standard, Beijing Police (81881957, this standard is not issued by the state The construction materials industry is subject to the National Industrial Standardization Technical Committee. This standard was drafted by the Shandong Industrial Ceramic Research and Design Institute of the Beijing Building Materials Industry. The standard was drafted by: Dingxi Industrial Ceramic Industry Development Co., Ltd. (Yongping Dingxi Ceramic Factory). The main drafters of this standard are: Li Dongsheng, Jingfa, and Li Haizhi. This standard was first issued in 1587.
National Standard of the People's Republic of China
Acid-resistant bricks
Aeid-resisting hricks and rilesGB/8488-2007
Generation G649E-·187
This standard specifies the definition, specification, shape, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of single bricks.
This standard is applicable to the resistant bricks used for indoor and ground floors (hereinafter referred to as bricks). Its ground-type products can be used in accordance with this standard. 2. Acid-resistant base
Bricks made of adhesive or other inorganic non-metallic materials, treated by skinning, sintering and other processes, suitable for acid-resistant bricks and floors. Divided into corrugated and non-corroded. 2.2 Sensitive
Non-corroded fine particles.
2.3 The cracks caused by the impact of the building.
2.4 The cracks on the brick surface, such as cracks, holes, bubbles, etc. 2.5 The cracks that cause damage.
The cracks on the glaze surface.
2.7 The lack of axis
The lack of axis on the surface of the axis product:
2.B The axis
The surface is like a shop, with poor gloss,
2.9 The axis
The axis surface loses gloss.
The matching error of the brick.
2.11 The working surface
The surface that is in direct contact with the working medium in use. 2.12 The non-working surface
The surface that is not in contact with the working medium in use. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on July 13, 2001 and implemented on February 1, 2002
3 Varieties and shapes
GR/T 8488-2001
3.1 According to physical and chemical indicators, it is divided into 7-1, 7.-2, 7.-3, and Z.-4. The specifications and shapes of 3.2 bricks are shown in Table 1.
Female 1 The desired shape of the brick
The shape and name of the brick
Ping grid shape
Width decision》
System (yuan)
15--32
13--23
10--20
GB/T 6488-2007
3.3 The export of other existing shapes of products needs to be negotiated by both parties. 3. 4 Production station mark
Strict product mark shall consist of product name, brand, specification and standard code. Marking example:
Length 25mm. Gram 113mm, width 55m/55mm z1 surface shape acid-resistant rotation: acid-resistant stop 2-1230×113×65/5 jin G8/T9488-2001 length 13cmm, width 75mu thickness 3tran 2-3 glazed flat brick: acid-resistant brick plate 7-3150×75×50G/T848820014 technical requirements
4.1 appearance with quantity
4. 1. 1 The appearance quality of bricks should meet the requirements of Table 2 Table 2
Fast sinking category
1. Working surface: not allowed
The appearance quality of bricks
Working surface, not too dry. 35, length, non-working surface not too dry 5. Length
Non-working surface not too C. 25.\5-15 allowed 2
1. Working two, working surface 1-2 thick dry 20, elastic not 13 brick thickness 25-3G not 5 turn thick 33
! Depth not too low: 0 is allowed to turn 2 places, the total length is not less than 35 people 2-4 length is not more than 35 3 places
Working: Maximum 2 people allowed 3
Non-working surface scene large size 1~3. Each side is allowed! Not allowed
Total is not more than 10m sm
This is not allowed
Not allowed
Not allowed
Working surface: Peak working surface 1 small and so on enjoy small hand 2, guarantee people 5 brick rate 2 one time depth not more than my thickness is not more than 30 times thank not more than [0 value seat good "place · total length not more than 40 non-work two depth 25 not allowed
working and, expansion inch -, allow
non-T working surface, large size, -6, each and allow 4 The surface is not more than 200 mm and not less than 50 mm. The surface is not allowed to be filled every day. The surface is not allowed to be reduced. The surface is not allowed to be strictly prevented: the standard shape should have a large and 30 mm width. 13 Table 2 shows the requirements for the working surface. When ordering, the purchaser shall specify the width of the working surface. The drawing shall meet the requirements of the calibration drawing 2. The following technical examinations are required. The other expressions in the table are or have the same meaning. 4.1.2 Delamination. The brick body shall be clear when gently knocked with a chain of appropriate quality. 4.1.3 Back pattern. The back of the flat brick shall have a back pattern of not less than 1 mm. 4.2 Dimensional deviation and deformation 4.2.1 The size deviation and deformation of the brick shall meet the requirements of Table 3. 4.2-2 The deformation of the product shall be determined by negotiation between the supply and demand parties. 4. 3 Physical and chemical properties
The physical and chemical properties of the bricks meet the requirements of Table 4. 3
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Change, turn the code
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Time rapid road rapid heat
5 Test methods
Bag 3 love size inquiry difference and service
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Table of physical and chemical properties
Difference 1X: 1:
5.1 People's small deviation and shape of the measurement
\. JSA2. U
: 3 09, 2
Differential difference IJCT:
The difference
is the difference between the two
test pieces. The specimens shall be tested for cracks, scratches, etc., and measured with a metal ruler and a feeler gauge with a 1.5mm indentation. 5.1.7 Dimensional deviation
The size of the brick shall be measured at the middle part of the brick surface. 5.1.2 Deformation
The deformation shall be measured on the plate of the brick. 5.1.2.1 The difference between the lengths of two parallel effective lengths shall be used as the size measurement value. 3. (5-5. Gwww.bzxz.net
Differential difference
5.1.2.2. Measure on the diagonal line of the brick. When working on the surface, place a metal ruler on the diagonal line, and take the maximum distance between the broken surface and the metal ruler as the measurement result. If the working surface is , then place two flat blocks with a known thickness of about 10mm at the diagonal, create a metal ruler on the flat surface, read the minimum distance 3 between the broken surface and the metal ruler, and take the difference of T-3 as the measurement result (see Figure 11
[ -First: 2-Back: 3-Brick
5 2 Appearance quality inspection
5.2.1 Use a straight and vertical ruler with a minimum distance of 0.5mm to measure the thickness of the steel plate. When the steel plate is in the lower position, the thickness is 4
1=…, as shown in Figure 2
5.3 Strength test
5.3.1 Testing machine
Figure ? Schematic diagram of the test
【Bamboo judgment
The testing machine used should have enough items and can be used with continuous waste The load of continuous velvet is controlled. The measurement angle is 1.5.3.2 The test support and pressure head have enough rigidity. The test will produce deformation during the test. The two half positions of the support and pressure head are arranged in the test cavity. The test head 12 test 13 test details support test machine base Figure 3 Schematic diagram of the support for strength test 5.3.3. The sample should be cut from the test brick, with a width of (20 ± 1mm, thickness (2℃ ± 11mm, and a length of not less than 13mm. The number of test groups should be at least 5 .
6.3.3.2, When the upper sample cannot be taken due to the limitation of the foundation, a rectangular sample with a width of (C+1) mm1 and a thickness of (excluding the back) and a length of (C+1) mm can be taken, and the report shall indicate it. 5.3.3.3 The lower two sides of the sample shall be flat and parallel to each other to ensure that the connection between the sample and the jade head is good. The sample is flat and the bottom side is facing up..
The laboratory can also be made by the same process as the strict product through the cooperation of the supplier and the demander-factory inspection, that is, or controlled, 5.3.4 Test steps||tt| |5.3.4.1 The cut specimens shall be dried in an electric drying oven at (112±5)°C and dried in the drying oven until they reach room temperature. 5.3.4.2 Place the center of the test piece on the specimen support. The long axis of the specimen shall be perpendicular to the support and the upper end drawing line. The span between the specimen supports shall be f. 1(mm). The test piece shall be tested at a rate of (5±1)MPa until the specimen breaks. The maximum load at the time of break shall be recorded. 5.3.4.3 Use a standard caliper to measure the width and length of the test piece to an accuracy of 0.05mm. 5. 3.5 Calculation of results 5.3.5.1 Calculate the strength according to formula 1 Where: R — load, MPa
\ Maximum load quotient when the specimen breaks, N;
— width of specimen fracture, mm
— thickness of fracture, m:
— width of specimen base, m,
GB/T8488—2001
5.3.5.2 The results should be calculated accurately to decimal points: Use the attached calculation A (see Appendix) to process the data and calculate the average value and standard deviation of at least 5 valid calculations as the acid test result. 5.4 Test for yield 5.4.1 Take any test block with an area of 10 cm~20 cm as the test sample, and the number of test blocks is 3. 5.4.2 Test steps 5.4.2.1 Clean the dust and broken particles attached to the surface of the test block and place it in an electric heating box at (119=5)°C to a constant temperature, and then cool it in a drying oven until it reaches a constant temperature. Note: The difference between the test block and the test block should be less than 1.1 hours for the previous test. 5.4.2.2 Accurately test the quality of the test block, and the accuracy of the test block is 1mg512.3 Heat the test block with an appropriate light-efficient device to boiling water after first cleaning it completely. , When boiling, a clean gauze should be placed between the apparatus and the sample to prevent contamination; during the boiling process, the surface should be kept small. 5.4.2:4 When the water cools to room temperature, take the sample and gently wipe off the excess water on the surface with a half-moistened needle. Weigh it five times to an accuracy of 1mP. 5.4.3 Calculation of water absorption rate 53.1 Calculate the water absorption rate by formula 2), the accuracy is 4 = 2 × 100
In the formula, 4-water absorption rate, %
m-test dry mass g
is the mass of the sample when it is moistened.
5.4.3.2 The mathematical average and single value of the block sample are taken as the test result. 5.5 Absorption resistance test
5.5.1 Sample
Take about 20 pieces of bricks and soil after the strength test or from the inspection bricks and soil (remove the inspection surface of the products with sleeves) and correct them to the correct particle size of C.25 mm--C.5 mm (if it comes into contact with iron, the iron should be removed) as the test sample. Use hot water to remove the powder on the surface of the sample, then wash it with anhydrous ethanol, dry it in an electric drying oven at 110 ± 5°C until constant weight is reached and store it in a desiccator for later use. 5.5.2 Test steps 5.5.2.1 Take out 100 mL of the dried sample and concentrate it to 0.1 g: 5.5.2.2 Place the sample in a conical flask weighing 300 mL. Add 100 mL of an equal volume of 10% acetal, aldehyde and acid-resistant sodium hydroxide to the conical flask. Stir gently and connect it to a reflux condenser. Heat in a (9 ± 1) water pot for 1 h. After 2.5 h, shake the conical flask once. 5.5.2.3 Take out the sample from the flask: Let it stand and cool for 15 minutes. Take out the upper layer of liquid in the flask and wash it repeatedly with water by desorption until there is no acidic reaction. Wash the sample with anhydrous ethanol and dry it at a temperature above (1 °C) for 10 minutes until it is acidic. Weigh the remaining sample accurately to the nearest 0.1 mg:
5.5.3 Calculation of results
5.5.3.7 Calculate the acidity according to formula (3), accurate to 2 digits after the minimum excitation point R=× 10C
Wu City, Ra-
Temperature, %:
71--Pre-brain sample mass, g;
r5:-Corrosion pressure sample mass + R.
5.5.3.2 The samples should be tested in parallel. When the difference between the individual results does not exceed 0.V4%, the average value shall be used as the test conclusion. Whether to retest or not.
5.E Rapid cooling and heating test
5.E.1 Take 3 pieces of qualified appearance quality as samples. For products with larger size, the test pieces with size close to the standard shape can be cut from the product as samples. The details should be dried in an electric drying oven at (110±5)°C, cold printing room, etc. 5.6.2 Electric heating oven, the temperature accuracy is ±2°C, after the test rod is put into the test rod , the test temperature shall be reached within 10m. 5.E.3 Place the sample in an electric drying oven with a fixed temperature of 30m:n. There shall be a fixed interval between the samples, which cannot be avoided. The difference between the test temperature and the water temperature shall meet the requirements of .3. 5.6.4 When sealed, take out the sample and put it in (soil) water to cool for 15min. Remove the sample and clean it with water or pack it in a bag. Observe with the naked eye whether there are micro-cracks, punctures and other damages, and remember them. G inspection conditions
6.1 Inspection classification
6.7.7 Type or type inspection shall include all items specified in the technical requirements of this standard. When the process requires a technical change, a type inspection shall be carried out. If the process does not change, it shall be carried out once a year.
6. 1.2 The inspection items include appearance quality, size difference, C.2 group of shaft samples. 6.2.1. Check the same production process, the same specifications, the same war 50CC to 3000 pieces as a batch, less than 500CC shortage, the two parties need to negotiate. The sampling is sent to the test column of Table 5, the non-acid damage test, and can be used for other items after inspection. 6. 3 Judgment rules
6.3.1 The sample size and number of the product samples will be judged according to the table regulations. 6.3.2 When there are unqualified items or the number of unqualified products reaches the number of unqualified judgment items in the first inspection, the product shall be inspected according to the provisions of test 5. If the re-inspection is qualified, the item shall be judged qualified. Otherwise, the item shall be judged unqualified. If more than 3 items of physical and chemical properties do not meet the requirements, the batch of products shall be judged unqualified and will not be re-inspected.
6.3.3 Each inspection period shall be supervised for more than one month.Otherwise, the batch of products is judged to be qualified. Table 5: Number of products and qualified judgment number of each batch of products
Sample number
According to the inspection items
Appearance quality
Dimension deviation
Hot and cold properties
Water absorption
Acid standard for each strength
Second time
Total judgment effect
Unqualified judgment lesson
First time 1 and then again ||tt| |Existence and development
Average and single considerations 9,3 important
Average capital should be based on the requirements of the table:
The requirements of the table 1
will not be qualified
For labeling, packaging, transportation and purchase
GB/I8466
7.1.1 The product packaging should be marked with the product name, variety, grade, trademark, manufacturer's certificate, semi-brick production in an appropriate manner.
7.1.2 When shipping, the product should be marked with the following contents: Certificate number:
Name of the cattle industry, address:
c! Name, specifications, product quality, quantity and production period:
) Comply with the standard:
f) Inspection department shall not take any orders,
7.2 Packaging
Product packaging shall be in accordance with the agreement between supply and demand. When packing, it shall be properly prevented from corners and changes. When packing, there shall be no fragile product mark on the bottom of the packaging: 7.3 Transportation
During transportation, it shall be moisture-proof and non-melting. The product shall be stable to prevent collision. It shall be handled with care during loading. 7.4 Storage
Products shall be stored according to different specifications, varieties and grades. Products shall be stored at all times. When storing, they shall be changed continuously. 8
GB/T 8488
Appendix A
(Appendix with the label only)
Abnormal data collection method
People sort the sample data obtained from the test or measurement in ascending order: X().X(2)..--.-x(
2Select the risk rate = 0.05, and get the value from the () table according to the element, A3 calculate the screening value
When the minimum value x<1> is suspicious, the purchase
When the value is suspicious, dust =|| tt|| is the sample average, =
S is the sample variance, 9
where, ——measured value;
《sample size
A4 compares T with T(na>value to make a judgment
When (), the suspected number is from another state and should be assigned to Benka, when 1 (), the two can remove the risk rate.
The probability of error in this judgment is =05. Compared with the values of and in the table, T(nu)
1.4f: +. R?
2. 113-96
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