1 Scope
This standard specifies the terms and definitions, specifications, varieties, grades, marking, raw materials, technical requirements, test methods, inspection rules, product qualification certificate, stacking and transportation, etc. of normal concrete small block.
This standard is applicable to the normal concrete small block (hereinafter referred to as "block") for industrial and civil architectures.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB 175 Common Portland Cement
GB/T 1596 Fly Ash Used for Cement and Concrete
GB/T 4111 Test Methods for the Concrete Block and Brick
GB 6566 Limits of Radionuclides in Building Materials
GB 8076 Concrete Admixtures
GB/T 14684 Sand for Construction
GB/T 14685 Pebble and Crushed Stone for Construction
GB/T 18046 Ground Granulated Blast Furnace Slag Used for Cement and Concrete
GB/T 18968 Terms of Wall Materials
GB/T 25176 Recycled Fine Aggregate for Concrete and Mortar
GB/T 25177 Recycled Coarse Aggregate for Concrete
GB 50176 Thermal Design Code for Civil Building
JGJ 63 Standard of Water for Concrete
YBJ 20584 Technical Specification for Crushed Air-cooled Blast Furnace Slag for Concrete
3 Terms and Definitions
For the purposes of this document, the following terms and definitions and those given in GB/T 18968 apply.
3.1
Normal concrete small block
The small block made of such raw materials as cement, mineral admixture, sand, stone and water by the processes of stirring, vibratory compaction, curing, etc., including hollow block and solid block.
3.2
Main shape block
The block shaped in rectangular hexahedron with the length of 400mm minus the vertical mortar joint thickness during bricklaying, the height of 200mm minus the horizontal mortar joint thickness during bricklaying, and completely sealed at side faces.
3.3
Auxiliary block
The block of special shape and dimension supporting the use of main shape block. It has hollow and solid types, including various special shaped blocks such as ring-beam block, one end open block, 7/10 block and half block etc.
3.4
Blocks without mortar
Blocks interconnected by tongue-and-groove structure, without the application of masonry mortar in the process of building (laying) wall with blocks.
