Reinforced Concrete Factory Project - Diploma

Contents

1. Introduction ---------------------------------------------------------------------------------

2. Characteristics of the designed enterprise -------------------------------------

3. Product Design -----------------------------------------------------------------------------------------------------

4. Concrete technology ---------------------------------------------------------------

5. Production technology -------------------------------------------------------------------------------------------

6. Production organization -----------------------------------------------------------------------------------------

7. Heat engineering part -------------------------------------------------------------------------------------------

8. Automation of production processes -------------------------------------

9. Construction part ---------------------------------------------------------------------------------------------------------

10. Warehousing -----------------------------------------------------------

11. Territory, layout and improvement of the industrial site ---------

12. Health, Safety and Safety Production Sled and Fire Safety ---------------------------------------------

13. Ecology -----------------------------------------------------------------------------

14. Economy of production -------------------------------------------------------------------------------------

15. Application of computer tools -----------------------------------

16. List of used sources -------------------------------------------------------------------

17. List of project drawings -----------------------------------------------------------------------------------

Introduction.

This diploma project presents the project of the plant of reinforced concrete products for transport construction with a capacity of 120 thousand m 3 per year, with the development of technology for the manufacture of slabs of reinforced concrete pre-stressed for covering urban roads.

For the production of road flooring slabs, we choose an aggregate-flow production method. This method is most suitable because it is suitable for a given technology and allows, if necessary, to redirect production to produce other products.

The project development takes into account the issues of functional interconnection of enterprise departments, establishes the relationship of individual operations in the overall production process, and calculates the duration of the main technological operations.

The diploma project has developed the main sections necessary for the further production of the product. Slabs for covering urban roads are subject to high requirements for frost resistance and crack resistance. Selection of concrete composition is performed most efficiently, as shown by economic calculations. To achieve better results, we use a superplasticizing additive in concrete, which reduces the water requirement of concrete, and therefore increases the frost resistance of products.

To reduce heat energy consumption, we design pit chambers with good heat insulation for heat treatment. We select a heat treatment mode that provides all the requirements for such products.

The effectiveness of the decisions taken is assessed by technical and economic indicators .

Selection of concrete type, process parameters and methods of concrete mix preparation and compaction.

Heavy concrete of class C25/30 is used for making slabs for covering urban roads. Average density of concrete shall be 22002500 kg/m3.

Slabs for the construction of urban roads are used in conditions with an estimated temperature of up to 40 C inclusive. In this regard, they are subject to increased requirements for strength and crack resistance according to GOST 21924.084 .

Concrete mixture shall provide concrete class C25/30 at design age, frost resistance F200.

The hardness of the concrete mixture should be 20 s. The minimum cement consumption in concrete on dense aggregates during manufacture of reinforced concrete prestressed articles shall be not less than 220 kg/m3, the maximum - not more than 400 kg/m3 according to SNiP 5.01.2383.

To prepare a low-plastic concrete mixture, a stationary batch concrete mixer with forced mixing of materials is used. Mixing occurs along complex paths, which increases the homogeneity of the concrete mixture. The concrete mixture must be homogeneous, it is compacted after being fed into the mold on the vibration platform.

Organization of main production.

The choice of production method is determined by a combination of a number of factors, the most important of which are:

- productivity of the designed production;

- structural and technological characteristics of the product: dimensions, weight, special molding conditions, labor-intensive molding, etc.

For the production of road flooring slabs, we choose an aggregate-flow production method. Based on the productivity of the workshop and the type of products, the use of aggregate flow technology is most expedient. This method of production does not require large capital investments and allows the production of a wide range of products.

The practice of using the aggregate flow method of production at existing plants allows, with relatively simple technological equipment, to achieve high removals of products from 1 m3 of steaming chambers, a significant decrease in the labor intensity of production and a decrease in the cost of production.

Aggregate-in-line technology is more flexible and maneuverable in relation to the use of technological equipment and allows, by re-setting it, to transition from one type of product to another, as well as to replace obsolete equipment without significant line redesign.

Process operations are carried out sequentially at several stations. To ensure normal production of products, the process is more divided - the number of posts is increased. This is due to the fact that reinforcement in our case is laborious and for its implementation it needs two posts per line. To ensure the continuity of the process, an automatic crossbar and a pusher are used to move the molds to the reinforcement posts, which allows you to significantly unload the cranes.

The most important stage of design is the calculation of the elemental cycle of forming the product, according to which the working rhythm of the flow of the aggregate flow line for the production of coating plates for urban roads is established.