This regulation is formulated to unify the construction of interlocking pavement bricks in municipal engineering, ensure the construction quality of interlocking pavement bricks, and improve the economic benefits of the project. This regulation is applicable to the construction and acceptance of interlocking pavement bricks in newly built and renovated urban roads, sidewalks, pedestrian streets and squares, courtyards, parking lots, etc. CJJ 79-1998 Construction and Acceptance Regulation of Interlocking Pavement Bricks CJJ79-1998 Standard download decompression password: www.bzxz.net

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Industry Standard of the People's Republic of China
Specification for Construction and1Acceptance of
Interlocking Block Pavement
CJJ79—98
3Beijing
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Industry Standard of the People's Republic of China
Specification for Construction and1Acceptance of
Interlocking Block Pavement
CJJ79—98
Editor: China Academy of Building ResearchApproval Department: Ministry of Construction of the People's Republic of ChinaImplementation Date: 199 July 1, 1998
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Notice on the Release of the Industry Standard "Interlocking Pavement Brick Pavement Construction and Acceptance Code"
Construction Standard [1998] No. 9
According to the requirements of the Ministry of Construction's Construction Standard [1993] Construction Standard No. 285, the "Interlocking Pavement Brick Pavement Construction and Acceptance Code" edited by the China Academy of Building Research has been reviewed and approved as an industry standard, numbered CJJ79-98, and will be implemented from July 1, 1998.
This code is under the unified management of the Beijing Municipal Design and Research Institute, the Ministry of Construction's urban road and bridge standard technology centralized unit, and the specific interpretation and other work are the responsibility of the editorial unit. The Ministry of Construction's Standard Quota Research Institute organizes the publication.
Ministry of Construction of the People's Republic of China
January 6, 1998
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General provisions:
Quality requirements and inspection and acceptance of surface materials.....
Quality requirements of surface materials.
Inspection and acceptance of surface materials.
Construction preparation
Positioning, elevation calibration and base review
Paving of curbstones·||t t||Setting of reference points and reference lines for pavement bricks
Paving of cushion sand layer
Paving of pavement bricks
Construction of special parts
7 Quality requirements and inspection and acceptance
Appendix A
Test method for compressive strength of concrete pavement bricks Common shapes of interlocking pavement bricks
Appendix B
Appendix C
Explanation of terms used in this code
Additional instructions
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1 General provisions
1 This code is formulated to unify the construction of interlocking pavement bricks in municipal engineering, ensure the construction quality of interlocking 1.0.1
pavement bricks, and improve the economic benefits of the project. 1.0.2 This code is applicable to the construction and acceptance of interlocking pavement bricks in newly built and renovated urban roads, sidewalks, pedestrian streets and squares, courtyards, parking lots, etc. In addition to complying with the provisions of 1.0.3 of this code
, the construction and acceptance of interlocking pavement bricks shall also comply with the provisions of the relevant current national standards. Engineering Construction Standards Full-text Information System
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1 Interlocking Block 2.0.1
The edges of the pavement bricks are serrated or curved, and the pavement bricks can bite each other after paving. 2.0.2
2 Double-side interlocking block The pavement bricks are serrated or curved on all sides, and can interlock in both directions after paving.
2.0.3 One-way interlocking block
singlesideinterlockingblock
A paving brick with a pair of serrated or curved sides that can only interlock in one direction after paving.
2.0.4 Interlocking blockpavement An interlocking block paving brick paved by a specific paving method that can interlock with each other to form a whole and have a certain arch shell effect under stress. 5 Sandmat
A sand layer with a thickness of 25 to 35 mm between the pavement base and the pavement bricks that can absorb and buffer the impact load of the pavement and transfer the load to the base. 2.0.6 Darby method
A construction method for paving a sandmat layer using a fixed frame, a guide rod, and a scraper. 2.0.7 Cut-off block
Cut-off block
Bricks of a certain shape obtained by cutting pavement bricks with a cutting machine. Engineering Construction Standard Full-text Information System
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3 General Provisions
3.0.1 Pavement structure and construction shall meet the following requirements: 1 The interlocking pavement brick pavement structure consists of a surface layer, a base layer, and a cushion layer, and the surface layer shall be constrained at the edge (Figure 3.0.1).
3.0.1.2 The surface layer shall be a structural layer consisting of interlocking pavement
bricks, joint sand and cushion sand layer. In the surface layer, the joint width between two adjacent pavement bricks shall be 3±1mm; the thickness of the cushion sand layer shall be 30±5mm.
3.0.1.3 The strength, minimum
thickness, block shape and paving form of pavement bricks shall comply with the provisions of Table 3.0.1-1. The compressive strength test method shall comply with the provisions of Appendix A of this specification.
38888888888888888
Strength, minimum thickness, block shape and paving form of pavement bricksRoad classification
Main road
Secondary road
Residential road
Compressive strength (MPa))
Minimum thickness
Two-way interlocking
Two-way interlocking
Two-way interlocking
Pavement structure
Table 3.0.1-1
Paving form
Note: Heavy-duty parking lots and heavy-duty storage yards can be considered as secondary trunk roads, medium-sized parking lots and medium-sized storage yards can be considered as branch roads, general parking lots and general storage yards can be considered as streets, and sidewalks and bicycle lanes can be considered as residential roads. 3.0.1.4
The base layer can be divided into upper base layer and lower base layer. In the case of small traffic volume, the base layer can be one layer.
When the water temperature of the roadbed is poor, a cushion layer should be used, and it should comply with the provisions of Article 9.3.4 of the current industry standard "Urban Road Design Code" CJJ37. 3.0.1.6
The cross-sectional drainage slope of the interlocking pavement brick pavement should be selected according to Table 3.0.1-2.
Cross-sectional drainage slope
Park roads, sidewalks
Degree (%)
Note: Drainage facilities should be provided for carriageways, parking lots, and storage yards, and there are no special requirements for other things. Table 3.0.3-2
Pavement bricks of different colors, shapes, and functions can be selected, and their patterns should be coordinated with the surrounding environment. The shape and size of pavement bricks should be adopted according to Appendix B of this specification.
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4 Quality requirements and inspection and acceptance of surface materials 4.1 Quality requirements of surface materials
4.1.1 The quality of pavement bricks shall meet the following requirements: 4.1.1.1 The compressive strength and block shape of pavement bricks shall meet the requirements in Table 3.0.1-2 of this specification. In addition to meeting the requirements of the current industry standard "Concrete Pavement Bricks" JC446, the size deviation of each batch of pavement bricks shall not exceed 2mm;
4.1.1.2 The top surface of the pavement bricks shall have a 5×45° chamfer around them; the surface of the pavement bricks should have a certain degree of roughness;
4.1.1.4 The thickness of the colored surface layer of the pavement bricks should not be less than 8mm, and it is advisable to use pigments with good weather resistance and not easy to fade.
2 The quality of the sand used for joints shall meet the following requirements: 4.1.2
The cumulative amount of residue passing through a 2.5 mm sieve hole shall not be greater than 5%; 4.1.2.1
The gradation of sand shall comply with Table 4.1.2 provisions; Sand grading for joints
Sieve hole size (mm)
Cumulative sieve residue (%)wwW.bzxz.Net
100~90
Mud content should be less than 3%; Mud block content should be less than 1%; Water content should be less than 3%.
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3 The quality of sand used for cushion sand layer shall meet the following requirements: 4.1.3
1 The cumulative sieve residue passing through the 5mm sieve hole should not be greater than 5%; 4.1.3.1
The gradation of sand shall comply with the provisions of Table 4.1.3; 4.1.3.2
Sand gradation for cushion sand layer
Sieve hole size (mm)
Cumulative sieve residue (%)
100~90
Mud content should be less than 5%; mud block content should be less than 2%; moisture content should be less than 3%.
4.2 Inspection and acceptance of surface materials
4.2.1 The inspection and acceptance of interlocking pavement bricks shall meet the following requirements: Table 4.1.3
The shape, color, thickness and strength of pavement bricks shall meet the design requirements; 4.2.1.1
The same shape, color and strength shall be used as one acceptance batch of 20,000 pieces; less than 20,000 pieces shall be counted as one batch. 50 specimens shall be randomly selected from each batch.
The main inspection items of each acceptance batch of specimens shall include the allowable deviation of size, appearance quality and compressive strength, and shall meet the requirements of the current industry standard "Concrete Pavement Bricks" JC446. The test method for compressive strength shall meet the requirements of Appendix A of this specification. 4.2.2 The quality standards of sand for joints and sand for cushion layers shall comply with the provisions of 4.1.2 to 4.1.3 of this Code, and their inspection and acceptance shall comply with the following requirements: 4.2.2.1 The sand for cushion layers and joints shall be accepted in batches of 200m2 or 300t respectively, with 200m3 or 300t counted as one batch; 2 The main inspection items for each acceptance batch of samples shall include particle grading, mud content and mud block content, and the test method shall comply with the requirements of the current industry standard "Quality Standards and Test Methods for Ordinary Concrete Sand" JCJ52; 4.2.2.3 Random sampling shall be carried out in each batch, and the sampling quantity of each group of samples for each single test shall not be less than the requirements of Table 4.2.2. Minimum sampling quantity of sand required for each test item
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Minimum sampling quantity (g)
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1 The base layer should meet the following requirements:
1 The strength and stiffness meet the design requirements;
The stability meets the design requirements;
The arch of the base layer is consistent with the surface layer, and the surface is flat and dense. 5.0.2
2 According to the different types of roads, the following base layers can be selected: (1) Integral type: inorganic binder stabilized granular material, industrial waste residue mixture, lime soil, cement stabilized soil, etc.;
(2) Interlocking type and graded type: mud-bound (mud-lime-bound) crushed (gravel) stone, water-bound crushed stone, graded crushed (gravel) stone, etc.
5.0.3 The requirements for various base materials and construction techniques shall comply with the provisions for flexible pavement design in the current industry standard "Urban Road Design Code" CJJ37. 5.0.4 Inspection and acceptance shall be carried out on the thickness, elevation, density, flatness, road camber and strength of the base (including the old road surface as the base), and the surface layer can be paved only after the quality is confirmed to meet the design requirements.
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