GB 26541-2011Autoclaved fly ash perforated brick (English PDF)

4.1 Specifications

The outlook for perforated brick hexahedral right angle, the length, width, height should meet the requirements of Table 1.

Table 1 Dimensions in millimeters

Length (L) Width (B) Height (H) 360,330,290,240,190,140 240,190,115,90 115,90 Note. Other sizes after consultation by both parties, such as the construction of a thin mortar joint, the relevant size can be adjusted accordingly.

4.2 Rating

Press strength into MU15, MU20, MU25 three levels.

4.3 Mark

4.3.1 porous brick by product code (AFPB), size, strength grade, standard number of sequence tags.

4.3.2 Tag example

Size is 240mm × 115mm × 90mm, perforated brick strength class tag example MU15 as follows.

AFPB 240mm × 115mm × 90mm MU15 GB 26541

5.1 Raw materials

5.1.1 Fly shall comply with JC/T 409's.

5.1.2 quicklime shall comply with JC/T 621's.

5.1.3 Other materials

Shall comply with the relevant requirements of the standard, the relevant test should be done before the application of non-standard materials, meet the requirements before use.

5.2 Hole

5.2.1 The hole should be built to withstand the pressure in the direction consistent with the brick.

5.2.2 Shop pulp surface should be blind or semi-blind holes.

6.1 Appearance quality and size deviation

Appearance quality and size deviation should meet the requirements of Table 2.

Table 2 appearance quality and dimension deviation in millimeters

Name of Project Specifications Appearance Quality Missing edge off angle the number should be less than (a) 2 Maximum three directions projection size should not exceed 15 Crack crack extending projection size should not exceed a total of 20 Bend should be less than 1 Spall allowed Size deviation Length 2, -1 Width 2, -1 Height ± 2

6.2 Porosity

Porosity of not less than 25% and not more than 35%.

6.3 Intensity level

Intensity level should be in accordance with Table 3.

Table 3 intensity level megapascals

power level

Compressive strength and flexural strength the average of five monolithic >= >= minimum average of five monolithic minimum >= >= MU15 15.0 12.0 3.8 3.0 MU20 20.0 16.0 5.0 4.0 MU25 25.0 20.0 6.3 5.0

6.4 Frost resistance

Frost resistance shall conform to Table 4.

Table 4 frost resistance

Antifreeze mass loss rate of the use of regional indicators /% compressive strength loss rate /% Subtropical region D15 Hot summer and cold winter area D25 Cold regions D35 Cold area D50 <=5 <=25

6.5 Linear drying shrinkage

Linear drying shrinkage should not be greater than 0.50mm/m.

6.6 Carbonation coefficient

Carbonation coefficient should be not less than 0.85.

6.7 Water absorption

Water absorption should be less than 20%.

6.8 Limit of radionuclides

Radionuclide limits shall comply with the provisions of GB 6566.

7.1 Appearance quality and size deviation

Appearance quality and dimension deviation test methods according to GB/T 2542 carried out.

7.2 Porosity

Porosity test methods according to GB/T 2542 carried out.

7.3 Intensity level

Standard Test Method for Compressive Strength according to Appendix A of flexural strength test method according to GB/T 2542 carried out.

7.4 Frost resistance

Frost resistance test method according to GB/T 4111 carried out, wherein the compressive strength test method in Appendix A be.

7.5 Linear drying shrinkage

Linear drying shrinkage test methods according to GB/T 4111 carried out, wherein a handheld gauge strain gauge is 150mm.

7.6 Carbonation coefficient

Carbonation coefficient test methods according to Annex B of.

7.7 Water absorption

Water absorption test methods according to GB/T 4111 carried out.

7.8 Limit of radionuclides

Radionuclide limits test methods according to GB 6566 carried out.

8.1 Inspection classification

Inspection is divided into the factory inspection and type testing.

8.1.1 factory inspection items include. appearance quality, dimensional variation and intensity level.

8.1.2 Type inspection items include all the technical requirements of the project. When one of the following circumstances, the need for the product type test.

a) new plant trial to identify stereotypes;

b) such as raw materials, technology, and other major changes occurred after the official production, which may affect product performance;

c) Normal production, every six months should be conducted;

d) Discontinued for three months or more, the production recovery;

e) factory inspection results are quite different when the last type inspection.

8.2 Batch rules

In the same batch of raw material, the same production technology, the same specifications, the same intensity level and the same age every 100,000 perforated brick as a group, according to a number less than 100,000 dollars.

8.3 Sampling rules

Test sample 8.3.1 appearance quality and dimension deviation extracted by random sampling from each batch of test products, test samples of other items Products by random sampling method from the appearance of quality and size deviation inspection sample extraction.

8.3.2 the number of samples in Table 5 were.

Table 5 Sample Number of Units blocks

Test items

Number of samples

(H/B) >=0.6 (H/B) 5, and d1 Appendix A (Normative) Standard Test Method for Compressive Strength A.1 Equipment A.1.1 Material Testing Machine Indication error testing machine should be less than 1% of its expected range selection should enable the specimen failure load falls on the full scale 20% to 80%.

A.1.2 Specimen preparation platform Specimen preparation platform should be flat level, flatness within its scope the longitudinal direction should be less than 0.1mm, available in metal or other material Make, plane size should be not less than 440mm × 240mm.

A.1.3 Level

Level specifications for 250mm ~ 400mm.

A.1.4 right angle on foot Right angle on foot should end length not less than 120mm, indexing is 1mm.

A.1.5 Steel ruler

Steel ruler specifications for 400mm, indexing is 1mm.

A.2 specimen

A.2.1 Number of specimens Autoclaved fly ash perforated brick compressive strength of five specimens.

A.2.2 Measure

Steel ruler to measure the size of each sample were measured width of the specimen (B) and length (L) in the middle on both sides of the sample, averaged, Accurate to 1mm; sample height (H) should take two values measured with two longer sides (L) at the middle, take the average to the nearest 1mm.

A.2.3 Preparation of test pieces Calculation of the aspect ratio (H/B).

A.2.3.1 (H/B) Preparation of test piece >=0.6 Take five whole brick in water (20 ± 5) °C after 24h immersion removed with a damp cloth to wipe the surface of the water, as the compressive strength of the specimen.

A.2.3.2 (H/B) Preparation of test pieces Appendix B (Normative) Carbonation coefficient test method B.1 equipment B.1.1 compressive strength test equipment with A.1.

B.1.2 carbonization chamber Volume put at least more than one set of specimens.

Environmental chamber conditions. volume of carbon dioxide at a concentration of (20 ± 3)%, relative humidity (70 ± 5)%, a temperature of (20 ± 5) °C.

B.2 Chemicals

Concentration of 1% phenolphthalein ethanol solution, with a concentration of 70% ethanol formulation.

B.3 Specimen

Number of aspect ratio (H/B) >=0.6 to two groups of 12 samples. A group of five was on a test piece; a group of seven carbide specimens, which 2 test for carbonation.

Aspect ratio (H/B)