Each inspection batch of brand crb550 is subject to two bends, and each batch of crb650 and above is subject to two repeated bending tests.
1.
Each 60t is an inspection batch, and one tensile test is carried out disk by disk or bundle by bundle.
14.
Compressive strength test blocks of commercial mortar: samples shall be taken at least once for each floor; when the area of each layer is ≥ 1000m2, samples shall be taken at every 1000m2; dry powder mortar shall be sampled and retested every three months; 7.
Hot rolled ribbed or plain round reinforcement: the same variety, brand, specification, furnace and tank number and delivery status.
Wall: sintered ordinary bricks from the same manufacturer at the same level, each 150000 pieces is an inspection batch, and a group of 15 pieces are sampled; For sintered perforated bricks of the same level and manufacturer, each 50000 pieces is an inspection batch, and a group of 15 pieces are sampled; Autoclaved lime sand bricks and fly ash bricks from the same manufacturer at the same level shall be one inspection lot for every 100000 pieces, and a group of 15 pieces shall be sampled; For small concrete hollow blocks of the same level and manufacturer, a group of 5 blocks shall be sampled for every 10000 blocks, and the small blocks used for the foundation and bottom layer of multi-storey and above buildings shall be ≥ 2 groups, with 5 blocks in each group; For autoclaved aerated concrete blocks of the same type and specification from the same manufacturer at the same level, take a group of 18 blocks for every 10000 blocks and saw them into 100mm square test blocks; Clay bricks are forbidden for non bearing walls and solid clay bricks are forbidden for bearing walls above ± 0.
Concrete slump test: concrete test with the same mix ratio of every 100m3 shall be ≥ once; each shift shall be ≥ twice; each vehicle shall be visually inspected; (cone collapse, slurry segregation and stone exposure are not allowed) 5.
Reinforcement welding joints: for flash welding joints, every 300 reinforcement joints of the same diameter, grade and welder shall be sampled for a group of 6, and 3 pull and 3 bend shall be made; For electroslag pressure welding joints, a group of 3 reinforcement joints in 2 floors of the same level shall be sampled every 300 and pulled for 3 times; For arc welding joints, a group of 3 reinforcement joints in 2 floors of the same type and level shall be sampled for every 300, and 3 pull shall be made; Resistance spot welding reinforcement welding skeleton (mesh), welding skeleton for every 200 reinforcement of the same diameter and grade (mesh) sample one group; for submerged arc pressure welding of T-joints of embedded parts, sample one group for every 300 embedded parts of the same type for 3 pulling, including 200mm long reinforcement and 60mm long and 60mm wide steel plate; for air pressure welding of reinforcement, sample one group for every 300 joints in two floors, 3 pulling for vertical joints of wall column and 3 bending for horizontal joints of beam and slab; the length of tensile test piece is 450mm and the length of bending test piece is 400mm..
Structural concrete compressive strength test block: every ≤ 100 plates or 100 cubic meters of concrete with the same mix proportion, Sampling ≥ 1 time (3 pieces in a group); sampling ≥ 1 time for concrete with the same mix proportion ≤ 100 plates in each shift; sampling ≥ 1 time for concrete with the same mix proportion every 200m3 when pouring ≥ 1000m3 continuously; sampling ≥ 1 time for concrete with the same mix proportion in each cast-in-situ floor (a group of 3 pieces); the reserved samples for the mouth and protective closed section of civil air defense works shall not be less than 1 group, and the reserved samples for the compressive strength test blocks of cured concrete under the same conditions with the same strength grade shall not be less than 3 groups, preferably more than 10 groups.
Decoration cement: one inspection lot with the same variety and grade of the same manufacturer, and each batch is sampled and retested once ；/ Retest setting time and stability of cement for plastering/ Retest setting time, stability and compressive strength of cement for facing brick pasting; 12.
Compressive strength test blocks of ground mortar: samples shall be taken at least once for each layer (6 pieces in each group) and each layer When the area of (each inspection lot) is ≥ 1000m2, sampling shall be increased once for every 1000m2; 8.
One group of each batch is sampled to make two pull and two bend, and one pull and one bend is added every more than 40 tons; The tensile test piece is 450mm long and the bending test piece is 400mm long.
13.
2.
Masonry mortar compressive strength test block: for mortar of the same type and strength grade of each floor or 250m3 masonry, each mixer shall take samples at least once (6 pieces in each group) 6.
Ground concrete compressive strength test blocks: sampling ≥ 1 time for each layer (or each inspection batch), and each layer When the area of (each inspection lot) is ≥ 1000m2, sampling shall be increased once for every 1000m2; 4.
Sand and stone: one group shall be sampled every 600t of the same origin and specification; the total amount of sand sampling is about 80kg, and the total amount of stone sampling is about 100 ~ 150kg; 9.
Concrete impermeability test Block: impermeable concrete test block with the same mix proportion in the same project, Sampling ≥ 1 time (1 group), and the number of sample groups can be determined according to the actual needs; underground waterproof concrete impermeability test blocks shall be sampled ≥ 1 time (1 group) every 500m3, and impermeability concrete test blocks for each underground waterproof project shall be reserved ≥ 2 groups (6 blocks in one group); 3.
The formwork removal test blocks shall be calculated separately.
Shanghai Regulations: there shall be no less than 1 group for each layer of multi-storey buildings, no less than 1 group for each three layers of medium and high-rise buildings, and the total number shall not be less than 6 groups.
Structural cement: 200t of bagged cement of the same grade, variety and batch number of the same manufacturer (500t bulk cement) is one inspection lot, and each batch is sampled once, with a total amount of at least 12kg; sampling and retesting are conducted once every three months; 10.
Every 60 tons is one inspection batch.
Cold rolled ribbed steel bars: the same shape, the same brand, the same specification, the same production process and the same delivery status.
Masonry cement: one inspection lot with the same batch number of the same manufacturer, and each batch is sampled once to retest the strength and stability; sampling and retesting are conducted once every three months; 11.
