Issues that should be paid attention to in the process of signing and performing the contract

1. What work should be done before signing the contract?

Before the contract is signed, the project leader should conduct a full investigation on the customer's funds, reputation, project overview, structural form, building area, concrete type, concrete quantity, construction unit, construction unit, etc.), and report the investigation to relevant Leadership report. The general manager, sales manager, production manager, and chief engineer will jointly review to prevent the contract from being signed inadvertently and causing undue losses to the company.

2 , What are the main contents of the joint review of the contract?

First of all, it depends on whether the customer has funds, whether the cooperation with concrete companies in the past has kept the credibility, and whether the contract has been implemented in place. Enterprises should have a list of bad customers, and try not to sign contracts with customers who are in arrears and do not abide by the contract. Secondly, it depends on the unit price of the product and the payment method. If the unit price is reduced too much, not only the profit of the enterprise will be low, the operation will be difficult, and it will cause a vicious circle of operation. Generally, payment can be made according to the progress of the project (that is, by floor), and there must be restrictive clauses before the project is capped to prevent the payment of the goods from being difficult to collect after the concrete main body is capped. Once again, it is necessary to review the user's technical requirements and construction requirements and whether the enterprise has the ability to meet them, so as to prevent the project from being passive after the start of construction.

Another important issue is whether the user is a legal entity. If there is a contract with the ×× project manager department, if there is a dispute in the future, it will be invalid to sue it. Some companies have lost money because of this. million payment.

3 , What are the settlement methods for concrete?

The first is to settle according to the actual amount of concrete supplied, referred to as the vehicle knot. Customers can randomly check whether the amount of concrete is sufficient at any time. If there is any shortage, the penalty will be ten. The customer can raise objections and find problems within 24 hours after the concrete is poured. Find the cause together and solve it in time. This settlement method is simple and easy, and is the preferred settlement method.

The second is to settle according to the drawing, which is commonly called "drawing" in engineering (hereinafter collectively referred to as "drawing"), which requires the construction unit to provide drawings (construction drawing, construction drawing) and design changes in time, Party A and Party B calculate the project quantity in time.

Check the amount of concrete in time with the construction progress. Once the quantity difference exceeds 2%, it is necessary to find out the reason immediately and solve it. Prevent the completion of the project or even the plastering to find the back tent. At this time, the concealed project is completely covered, and the concrete is too thick and wide to measure.

4 , How to estimate the amount of concrete in the Tujie project?

Estimate the total amount of the project before signing the contract to prevent the amount of advance payment from exceeding or approaching the total amount of the project, resulting in difficulties in payment.

5 , Which projects or parts should not be drawn?

Brick-concrete structures generally only use concrete for beams, stairs, ring beams, lintels, and structural columns; villa projects have small sections, and materials are easily scattered during pouring, resulting in serious waste of concrete; these two types of projects It is not suitable to draw conclusions. In addition, underground works such as hole piles, cushions, foundation slabs, modeling works, and basements are not suitable for drawing.

6 , Why should loss be added to the graph junction project?

In some areas of my country (such as Liaoning Province), the quota stipulates that ready-mixed concrete will have certain material loss during transportation and pumping, such as the concrete bonded inside the tank body, and the pump when the pumping is completed. There is a part of the remaining concrete in the bucket and the pump pipe to be discharged, which is about 2% of the total. In addition, after the concrete is put into the mold and vibrated, its volume will be smaller than the original. The volume after vibration divided by the loose volume is called the filling coefficient, which is generally 0.95. In view of the above reasons, the figure junction project should have about 2% loss.

7 , How should ready-mixed concrete enterprises prevent insufficient supply?

Ready-mixed concrete production enterprises should verify the electronic scales of the mixing station by the legal metrology department every year, and the enterprise should also calibrate the electronic scales of the mixing station once a month. The measurement error of sand and gravel should be ≤±3%, and the measurement error of admixture, cement, admixture and water should be ≤±2%. If the above requirements are exceeded, production must be stopped in time to find out the reasons and solve them. In addition, production enterprises should spot-check the concrete weight every week. When the difference between the weight of heavy trucks and empty trucks is divided by the corresponding volume, and the apparent density obtained is less than the design value, the batching amount should be adjusted in time to prevent insufficient amount. Another problem that is easily overlooked is that the bulk density of crushed stones sometimes changes due to changes in the collection site and particle gradation. When the bulk density is high, if the amount of crushed stones remains the same, the volume of the prepared concrete may decrease. Insufficient supply of concrete. Therefore, the laboratory should often use a capacity cylinder to measure the apparent density of concrete. If the apparent density of concrete becomes larger, the volume of concrete with the same weight will be smaller. At this time, the amount of stones should be increased in time.

8 , What issues should the salesperson pay attention to in terms of technology when signing the contract?

Ground engineering needs to know its length and width. If the length exceeds 30M, the technical department should be notified in time to prevent irregular cracks on the ground. For ground engineering, it is necessary to know whether there is a finishing layer on the upper part, and whether it is calendered ground (that is, the surface will not be decorated after calendering). If it is calendered ground, it must be indicated, and the price should be increased appropriately.

The road and bridge projects in the northern region must ask the user whether to sprinkle deicing agent when using it. No admixture and air-entraining agent should be added to the concrete sprinkled with deicing agent. Therefore, it must be specified in the contract that this is special concrete , the selling price must be increased.

Outdoor water storage tanks (such as sewage treatment plant storage tanks) and hydraulic engineering in the northern region have freezing and thawing requirements during the use phase, and must be prepared according to frost-resistant concrete. price.

Where the project has a large-span structure, prestressed structure, large-volume structure, or super-long structure (length greater than 80cm), the technical department should be notified in time after the contract is signed, so that the technical personnel can focus on monitoring the construction process of these structures .

If the project has fair-faced concrete (that is, the concrete surface will no longer be decorated in the future, and the concrete with a smooth surface and uniform color is required), self-compacting concrete, the technical department and material supply department must be notified in advance. Due to the large amount of concrete binder used, the material requirements are relatively high, so its unit price also needs to be increased appropriately.

9 , What should be paid attention to when signing a contract for group engineering?

There are more than a dozen or even dozens of projects in a park. When signing the contract, the name of each individual project must be indicated, and the payment should be controlled according to the contract. Otherwise, the group project will not be completed until all the concrete main bodies are completed Ready-mixed concrete companies will be under great economic pressure for the balance payment, and too much arrears will bring difficulties to the operation of the company.

10 , What is the difference between the completion of the main concrete structure, the completion of the main structure of the project, and the completion of the project?

The main structure of the project includes concrete structure, masonry structure, steel structure, etc., and the completion of the whole project includes the main structure, waterproofing, plastering, plumbing, electrical, decoration, doors and windows, etc. The quality of concrete is only related to the main body related to the concrete structure in the structure. Therefore, when signing the contract, the final payment for the project cannot be paid after the completion and acceptance of the main structural project or the entire project.

11 , When the underground works are settled according to the actual supply, what should be paid attention to when drawing the above-ground works?

When the underground project is completed and before the above-ground project starts, the pouring of the underground project shall be checked and confirmed by both parties. For example, whether the upper elevation of the pile foundation meets the design requirements, whether the underground stairs and equipment foundation have been poured, often because the elevation of the top of the pile foundation is low or some parts of the basement have not been poured, part of the concrete that is settled according to the actual supply quantity is mixed into the concrete of the diagram. In the process, the supply of ready-mixed concrete was "lost".

12 , What should be paid attention to before the project starts?

Before the start of the project, the head of the production and technical department must go to the construction site in person to understand the road and ground conditions of the factory area, whether there is backfill soil and high-voltage lines, whether there are restrictions on trucks in the area where the project is located, and determine the working position of the pump truck and tanker driving routes, formulate safety construction measures to prevent accidents such as car sinking, overturning and high-voltage electric shock caused by backfilling the ground. In addition, it is also necessary to determine the authorized visa person for each project receipt, and keep his signature and seal in written form to prevent future disputes.

13 , What should be paid attention to in the process of contract implementation?

After the contract is implemented, special personnel should be sent to the construction site to check the concrete supply in time, and the settlement statement should be issued regularly. When the concrete supply is close to the contract settlement amount, the user should be notified in advance to prepare the payment to prevent excessive supply and backlog The payment for goods has resulted in low repayment rate of ready-mixed concrete enterprises and difficulty in operation.

14 , Why has the contract been signed and the user is required to fill in the concrete production order before each pouring?

All the management of the enterprise should be recorded in written form. Although the user has notified the ready-mixed concrete enterprise by phone 24 hours before the user needs concrete, the customs notification is often wrong, especially the concrete model is often misrepresented. , misheard, misremembered, resulting in engineering accidents. Therefore, the user must personally fill in the concrete production order including pouring location, model, quantity, technical requirements, pouring time and other information. The order is an important document with legal effect and should be kept properly.

15 , What information should be provided by the customer for the diagram knot project?

Graphic junction project should The construction unit shall provide structural construction drawings (beams, slabs, columns, stairs, walls, etc.); architectural construction drawings (including structural columns, ring beams, lintels, awnings, trenches, drainage slopes, bay windows, cushions, ground , roof protection layer, leveling layer and balcony, modeling and other construction drawings), in addition, there should be a change order or drawing during the construction process.