What materials need to be prepared for the inspection of building materials and construction project

1. Steel. According to the same brand, the same batch number, the same specification (diameter), and the same delivery state each time they enter the site, the total weight is not more than 60 tons for a batch (less than 60 tons is counted as a batch).

Note: The quantity of each batch of cold-drawn steel bars is not more than 20 tons.

The quantity of cold-drawn low-carbon steel wire in each batch is not more than 5 tons.

The quantity of cold-rolled torsion steel bars in each batch is not more than 10 tons.

2. Steel bar welding.

Arc welding: under the factory welding conditions, 300 joints of the same joint type and the same steel bar level are used as a batch;

Under the conditions of on-site installation, 300 joints of the same joint type and the same steel bar level are used as a batch in each to the second floor; When there are less than 300, it is still used as a batch.

Flash butt welding: 300 steel bar welded joints of the same level and diameter completed by the same welder in the same class should be.

As a batch. When the number of joints welded in the same class is small, it can be accumulated within a week; If the cumulative number of joints is still less than 300, it should be counted as one batch.

Electroslag pressure welding: In the cast-in-place reinforced concrete multi-layer structure, 300 steel joints of the same level should be used as a batch in each floor or construction section, and less than 300 joints should still be used as a batch.

3. Mechanical connection of steel bars.

Rebar cone threaded connection:

Joints of the same grade and specification of the same batch of materials under the same construction conditions shall be inspected and accepted as an acceptance batch with 500 pieces, and less than 500 pieces shall also be used as an acceptance batch. When 10 acceptance batches are continuously inspected on site, and all one-way tensile tests are qualified at one sampling, the number of joints in the acceptance batch can be doubled.

Ribbed rebar sleeve extrusion connection:

Under the same construction conditions, the same batch of materials of the same grade, the same type, the same specification of the joint, with 500 as an acceptance batch for inspection and acceptance, less than 500 as an acceptance batch for inspection and acceptance.

When 10 acceptance batches are continuously inspected on site, and all one-way tensile tests are qualified at one sampling, the number of joints in the acceptance batch can be doubled.

Sand, gravel, and cement should be sampled under the witness of the supervisor, of which 30% will be sent to the laboratory under the witness of the supervisor, and the rest of the construction units will be sent for inspection by themselves. The sample size specification is specified. Do not submit materials from elsewhere in place of the materials you use.

The raw materials in the engineering data must be sampled under the witness of the supervision after the engineering materials enter the construction site, otherwise the supervision unit will be regarded as effective data, because the supervision should also sign the witness column on the material report. You can also check the specifications for the inspection of building materials. The above is very detailed.

In addition, there is a principle in the guarantee of information, that is, all building materials used in the project must have a written certificate of conformity (certificate, quality inspection report, etc.).

Material testing. Building materials, energy-saving materials testing.

1) Building materials.

1. Inspection of physical and mechanical properties of cement.

2. Routine inspection of sand and stone.

3. Concrete strength, impermeability, mix ratio.

4. Mortar strength and mix ratio inspection, dry mortar.

Polymer cement waterproofing mortar.

Inspection of cementitious crystalline waterproof coatings.

5. Concrete admixtures, fly ash, slag powder, silica powder.

Inspection. 6. Wall material inspection, including sintered ordinary bricks, sintered perforated bricks, sintered hollow bricks and hollow blocks, concrete perforated bricks, and ordinary concrete small hollow blocks.

7. Waterproof material testing (asphalt waterproof material, polymer waterproof material, waterproof coating, building sealing material).

Routine inspection items of waterproof materials Asphalt waterproof materials: soluble content, impermeability, heat resistance, tensile force, elongation at maximum tensile force, low temperature, tear hole crack strength;

Polymer waterproof material: tensile strength.

Elongation at break of tensile force, dimensional change rate of heat treatment, low temperature bending, impermeability, dimensional deviation, adhesion under shear, hardness (Shore A);

Waterproof coatings: tensile strength, elongation at break, low temperature flexibility, impermeability, solid content, heating and expansion rate, coating film surface drying time, coating film drying time, heat resistance, adhesion;

Building sealing materials: density, heat resistance, low temperature flexibility, tensile adhesion, tensile adhesion after immersion, surface drying time, sagging.

Other tests of the project include: cement, concrete water, admixtures, fly ash, water glass.

Ceramic bricks, acid-resistant bricks, slag powder, lime for construction, ordinary sand, sand for construction, adhesives, etc.

2) Energy-saving materials.

1. Insulation board (EPS board, XPS board, polyurethane foam, foam glass products, rock wool for construction.

Slag cotton insulation products, glass wool products for building insulation, etc.)

2. Rubber powder polystyrene particle insulation slurry and aerated concrete block.

of inspections. 3. Inspection of adhesive for heat preservation, plastering mortar, anti-crack mortar, brick bonding mortar, etc.

4. Strengthen the inspection of anti-crack putty, flexible water-resistant putty, etc.

5. Inspection of alkali-resistant mesh cloth.

6. Inspection of wire and cable cross-sectional area and resistance value per unit length.

7. Tensile strength of energy-saving anchor bolt (on-site pulling.

Geotechnical testing. Simple geotechnical inspection, including density, unconfined compressive resistance, liquid plastic test, compaction test, asphalt pavement compaction.

Drilling method), road rebound and bending,

On-site testing. Chemical anchors.

Pull-out test, mechanical anchor pull-out test, chemical planting bar-pull-out test, etc.

The material inspection fee is paid by the owner, but now it is often a one-time package at the time of bidding. The proposed wood veneer should be sent for inspection, and the cost depends on the agreement of the contract, if the contract is not agreed, it has to be negotiated, because sometimes, the material supplier is also willing to pay this fee.

Under normal circumstances, the construction project material testing fee is included in the material cost, when the construction unit pays the construction unit for the project, there is a material fee, and the material fee includes the testing fee, if there is no special description in the contract, the material testing fee is paid by the construction unit. The cost of raw materials, auxiliary materials, components, parts, semi-finished products or finished products, and engineering equipment consumed in the construction process. Topics include:

1. The original price of materials: the factory of materials and engineering equipment** or merchants****.

3. Transportation loss fee: refers to the inevitable loss of materials in the process of transportation and unloading.

Non-metallic materials.

Non-metallic materials are also important engineering materials. It includes refractory materials, refractory thermal insulation materials, corrosion-resistant (acid) non-metallic materials and ceramic materials, among others.

Polymer materials are organic synthetic materials, also known as polymers. It has high strength, good plasticity, strong corrosion resistance, good insulation and light weight, and is the fastest growing new type of structural material in engineering. There are many types of polymer materials, which are usually divided into three categories according to their mechanical properties and use status

Plastics, rubber, synthetic fibers.

1. Generally, the owner pays the inspection fee;

2. If the bidding is lump sum at one time, the construction party will come out;

3. If the contract agrees otherwise, the security contract stipulates;

4. If there is no agreement in the contract, it shall be decided through negotiation;

5. The material supplier also voluntarily pays this fee.

If it is according to the list specification, the list valuation (state-owned project) must be borne by Party A, because the material testing fee has been included in the enterprise management fee. If it is an enterprise project, depending on the contract requirements, you can also negotiate on your own. That's how I understand it!

In addition to the provisions of the inspection materials are the responsibility of the construction unit, the construction unit is responsible for the other materials submitted for inspection by the supervision of the construction unit. As long as there is a certificate of appearance of the wood veneer material you are talking about, if you want to send it for inspection, the qualified one will be issued by the construction unit, and the construction unit is responsible for the unqualified.

Whoever buys the materials pays for it, and the inspection and test fee is generally included in the first time. If the material is purchased by the construction unit, the construction unit can request the material manufacturer to submit the inspection and provide a test report. If it is the construction unit A to supply materials, the material supplier can be directly sent for inspection or entrust the construction unit to send it for inspection (the latter construction unit needs to pay); Anyway, this money is ultimately from the construction unit.

If it is a material purchased by Party A. If the general contractor purchases materials, the inspection and cost shall be borne by the general contractor, and if the subcontractor is a qualified professional unit (contractor and materials), the laboratory shall submit the inspection, and the cost shall be borne by the contractor of the materials. The premise is that there must be a supervising engineer on site and send samples for inspection.

It depends on whether the construction unit is contracted labor and materials, or only contracted labor, if the construction unit is contracted labor and materials, the engineering material inspection fee will be paid by the construction unit, if it is only a contractor, it will be paid by the construction unit.

The owner Party A invests capital, and generally needs to be accompanied by the supervisor, fill in the entrustment form, write the sample certification number, the name and certificate of the sampling personnel, etc.

Whether the general inspection fee of materials for construction projects is paid by Party A or the construction party.

Article 6 of the Ministry of Construction's [2000] No. 211 document "Provisions on the Implementation of Witness Sampling and Inspection for Housing Construction Projects and Municipal Infrastructure Projects", the scope of applicable varieties, as well as the energy conservation and environmental protection, glass tightness, wind pressure resistance and other materials stipulated by the local (provincial) should be witnessed sampling and inspection.

The specific number of samples and the number of representative batches should be familiar to the witnesses, because the witnesses are trained and certified, and the witnesses have forgotten that they can consult the monitoring station.

Steel bar raw material: 2 long and 2 short, long 50cm, short 30cm, each batch by the same factory, the same furnace number, grade, the same specification, grade, the same delivery state, the same entry time, hot-rolled ribbed steel bar composition 60t per batch, cold-rolled ribbed steel bar composition 50t per batch, cold-drawn steel bar 20t per batch, less than 20t, also a batch, all sampled once.

Definition. The planning, survey, design and construction, completion and other technical work carried out for the construction, reconstruction or expansion of buildings and ancillary structures and facilities, as well as the completion of engineering entities and the installation of supporting lines, pipelines and equipment. It also refers to the construction of various houses and buildings, also known as construction workload.

This part of the investment must be carried out through construction activities.

Sampling and inspection of construction engineering materials is to take representative samples and send them to the laboratory for retest and testing after the building materials enter the construction site to test whether the materials are qualified.

1. In fact, the materials to be inspected in the construction project have been expressed in detail in the current construction quality acceptance specifications, which define that all materials used in the project must be inspected or have quality certification documents. Because the content covered is very wide, it is recommended that you take a look at the detailed expressions and requirements in the specification. It should be noted that the specification only clarifies that the materials used for the project must have quality inspection or quality certification documents, which does not mean that each material must be inspected or tested, and the general materials can provide material quality certification documents that do not need to be sent for secondary inspection.

2. The inspection of engineering materials is an objective and rigorous work, and the building materials that need to be inspected and tested should be sampled, sealed and inspected under the witness of the witness, so the material inspection work on the project needs to be witnessed by a witness. However, it should be noted that the witness work of the materials is generally the relevant personnel of the supervision or construction unit who have obtained the qualification of the witness, and the project shall be filed before the start of the project and the witness record shall be filled in each witness.

Hello, I'm sorry to keep you waiting, the building materials need to be tested as follows: 1. Construction and closure of ridge construction projects (11 kinds): 1, steel factory certificate, test report 2, welding test report, welding rod (agent sail group) certificate 3, cement factory certificate and test report 4, brick factory certificate or test report 5, waterproof material certificate, test report 6, component certificate 7, concrete test block test report 8, mortar test block test report 9, soil test, pile record 10, Foundation groove inspection record 11, structure hoisting, structure acceptance record.

2. Building heating sanitation and gas engineering (5 types) 1, materials and equipment factory certificate 2, pipeline, equipment strength, weld inspection and tightness test record 3, system orange cleaning record 4, drainage pipe irrigation, water test record 5, boiler baking, cooking furnace, equipment test operation record.

3. Building electrical installation engineering (3 types) 1, main electrical equipment, material certificate 2, electrical equipment test, adjustment record 3, insulation, grounding resistance test record.

4. Ventilation and air-conditioning engineering (3 types) 1, materials and equipment factory certificate 2, air-conditioning test report 3, refrigeration pipeline test record.

5. Elevator installation engineering (3 types) 1, insulation, grounding resistance test record 2, empty, full, overload test operation record 3, adjustment, test report.

Legal analysis: The material inspection can be entrusted by the construction unit. The specifics of the test should be:

1. If compulsory inspection is required, the sample shall be intercepted (selected) according to the requirements of the inspection and sent to a professional testing institution for testing;

2. For other construction materials, submit to the supervisor for review (material declaration form) as required, and ask the supervisor or the owner to jointly inspect the real sample and confirm that it can be used for construction;

3. After arriving at the laboratory, fill in the test form according to the requirements, and quietly finish, go home and wait for the news to receive the test report. After getting the report, make a copy and give it to the superintendent.

Legal basis: Article 59 of the Construction Law of the People's Republic of China In accordance with the provisions of this article, construction enterprises shall inspect the construction materials, building accessories and equipment in accordance with the requirements of the following three aspects:

1) The inspection must be carried out in accordance with the requirements of the engineering design. That is, the building materials must be inspected in accordance with the specifications, models, performance and other technical requirements of the building materials, building accessories and equipment specified in the design documents, and the construction enterprises shall not use the building materials, building accessories and equipment that do not meet the technical requirements specified in the design documents;

2) must be inspected in accordance with the relevant construction technical standards. In the technical standards of various construction operations, the quality requirements of the building materials used in the construction, the building structure with the slag parts, etc., shall be stipulated, and the construction enterprise must conduct inspection in accordance with the provisions of the relevant construction technical standards, and shall not be used if it does not meet the construction technical standards;

3) The inspection must be carried out in accordance with the technical requirements agreed in the construction contract. If there is a clear agreement on the quality requirements of the building materials, building accessories and equipment used in the construction contract, the construction enterprise must conduct inspection in accordance with the technical requirements agreed in the contract, and shall not use it if it does not meet the requirements agreed in the contract.