List of instruments for commodity concrete mixing plant laboratory

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List of instruments for commodity concrete mixing plant laboratoryIntroduction:

1. YES-2000 digital pressure testing machine 1 unit
2. One YES-300 cement flexural and compressive testing machine
3. One DZK-5000 cement electric flexural testing machine
4. Standard constant temperature and humidity curing box YH-40B spraying 1 set
5. One HJW-60 single horizontal axis concrete mixer
6. Concrete vibration table 1 meter per unit
7. 1 digital display of concrete penetration resistance meter
8. Concrete rapid curing box HJ-84 1 unit
9. One 7L concrete air content tester
10. 1 set of concrete shrinkage expansion meter SP-540 type
11. One SY-2 concrete pressure bleeding meter
12. One ZCA-3 concrete rebound tester
13. Electric hot blast drying oven 550x550x450 1 set
14. Cement negative pressure sieve analyzer FYS-150 1 set
15. Cement slurry mixer NJ-160 1 unit
16. One JJ-5 cement mortar mixer
17. Cement sand compaction table ZT-96 1 set
18. One NLD-3 cement mortar flowability tester
19. One ZBSX-92A standard vibrating screen machine
20. One HP-4.0 concrete impermeability tester
21. One new standard cement consistency meter
22. One Lei style boiling box FZ-31A
23. One BYS-III intelligent control device for the maintenance room
24. Two humidifiers in the maintenance room
25. One FBT-9 specific surface area measuring instrument
26. One net slurry flowability test mold
27. Cement sand test mold 40x40x160 15 pieces
28. 20 concrete compression test molds 150x150x1501
29. 30 sets of concrete compression test molds with dimensions of 100x100x100
30. Anti permeability test mold 175x180x150 18 pieces
31. One electronic scale weighing 30kg-1g
32. One electronic scale weighing 100kg-10g
33. One electronic balance weighing 2000g-0.01g
34. One TM-II concrete elastic modulus tester
35. One set of sand and stone sieves
36. Two sets of slump testers with thickness
37. One set of needle plate gauge
38. Cement sampler, 2-meter stainless steel, 1 piece
39. One set of anti-seepage test block demoulder
40. One set of stone crusher
41. One set of sand crusher
42. Box type resistance furnace SX2-4-10 1 unit
43. Cement negative pressure sieve 0.080mm, 045mm, 5 each
44. 225ml water measuring device, 225ml 2 pieces
45. Volume liter 1L-50L 1 set
46. 10 cement softening and curing tanks
49. Two 50cm steel rulers
50. 5 dry and wet temperature gauges
51. Porcelain plates 200 * 300, 10 pieces
52. Porcelain plates 300 * 450, 10 pieces
53. 10 pieces of 100 * 100ml glass plates
54. Two pieces of 500 * 500ml glass panels
55. 10 thermometers
56. Two sets of liquid specific gravity meters ranging from 0.8-1.5 (7 pieces)
57. 10 thermometers
58. Measuring cylinder 50-1000ml 1 set
59. One set of 50-1000ml beakers
60. Li's specific gravity bottle 250ml, 1 piece
61. Glass wide mouthed bottle 1000ml 1 piece
62. 10 straws
63. One cement compression fixture (Xinda Instrument)
64. One air pump
65. One experimental mixing device
66. Two triangular scraper blades
67. Standard sand (ISO) 10 bags
68. 12 Lei's clamps
69. One LD-50 clamp tester

1、 Overview:

Powered by a gasoline engine, it is easy to start, reliable in operation, and easy to operate. It is equipped with artificial diamond thin-walled drill bits, mainly used in concrete projects such as highways, airports, ports, docks, and dams, and is a new series of products for drilling and coring. This machine can take cores of 400-5000mm, mainly used for compressive and flexural tests on concrete, limestone, foundations, etc. on high-grade highways. Scientific research and coring are also very ideal. In addition, this drilling rig can also drill and core other non-metallic brittle and hard materials, such as refractory materials, ceramics, glass, and rocks.

2、 Technical parameters:

1. Model: HZ-20 type

2. Drilling and coring with a diameter of Φ 200mm

3. Drilling and coring depth: 700mm (can be equipped with an extension rod)

4. Drilling direction: Vertical downward

5. Feed mode: manual, automatic

6. Spindle speed: 800-1200r/min

7. Drill bit form: artificial diamond thin-walled drill bit

8. Supporting power:

Gasoline engine model: MZ-175 MZ-250 MZ-300 MZ-360

Honda gasoline engine model: Gx270 Gx390

Power: 3.3KW-6.5KW

Rotation speed: 3600r/min

9. Dimensions: Length x Width x Height: 1080 x 780 x 1300/1400mm

10. Weight: 150kg

Construction Plan for Temporary Mixing Plant

1、 Compilation basis

1. Xintianzhai Xiangzhi Tourism Project in Guiyang City, Guizhou Province.

2. Regarding the requirements of further implementing the relevant regulations on "centralized processing and centralized mixing".

3. Current construction engineering design specifications, construction specifications, construction technical regulations, quality assessment standards, and acceptance methods.

4. On site investigation data, our company's construction experience, scientific and technological achievements in similar projects, as well as the construction equipment and technical strength used for this project.

2、 Project Overview

3、 Construction standards for temporary mixing plants

In order to ensure the quality of the project, strengthen on-site safety and civilized construction, standardize on-site standardized operations, and improve corporate reputation, we strictly follow the requirements of "four centralizations and six unifications", arrange and plan the concrete mixing station in a unified and reasonable manner, and plan and arrange it reasonably according to the requirements of standardized operations.

The construction standards for temporary mixing plants are as follows:

1. Requirements for the construction of the mixing plant site: The mixing plant site must be hardened to meet the requirements of heavy vehicle loads. Based on the actual situation of the construction site, after the site leveling is completed, the slag filling and leveling should be carried out according to the actual situation of the site. The thickness of the slag filling at the soft foundation should be appropriately increased, and the concrete should be poured after the compaction and leveling are completed.

2. Concrete pouring principle: Heavy vehicles are considered to drive in the mixing plant area, material yard, and roads, and the frequency is relatively high. In addition to leveling and compacting the site, 20cm of crushed stones are placed and then compacted flat. The concrete pouring thickness is 15cm, and the concrete grade is C15.

3. Before pouring concrete, the drainage system inside the mixing plant should be planned first. The planning of the drainage system should be based on the actual situation on site, and drainage ditches should be excavated and constructed.

4. Measures should be taken to store cement, admixtures, mineral admixtures, etc. used in the production of concrete to prevent moisture and deterioration. And ensure that the labeling content is complete, prominent, and standardized.

5. Sand, stones, and cement must be stored in separate areas, designated as "qualified areas" and "waiting areas" respectively. Each area should be effectively isolated by isolation walls according to different varieties and specifications. The sand and gravel in the "qualified area" should be covered and protected with sturdy scaffolding to achieve shading, rain and dust prevention purposes. In summer, they should avoid direct sunlight exposure and prevent dust and fallen leaves, ensuring that there are no impurities in the raw materials.

6. Management of measuring instruments

All kinds of weighing instruments should be regularly calibrated (by the metrology institute under the local technical department), and zero point calibration should be carried out before each use on the construction site (by a dedicated metrologist on site) to ensure the accuracy of the weighing instruments.

After each use, the dedicated metrologist at the construction site should wipe the weighing instrument clean with a clean cloth and cover it with a waterproof cover; When encountering rainy weather or significant changes in moisture content, professional foremen (construction workers) should increase the frequency of testing the moisture content of coarse and fine aggregates, and adjust the mix proportion (water and aggregate dosage) in a timely manner.

7. Measurement accuracy control

To ensure the accuracy of the concrete mix ratio and the weighing of each batch of raw materials for the concrete mix ratio, it is strictly prohibited to use weight ratios and volume ratios. Mechanical mixing should be used uniformly, and the mixing time for each batch should not be less than 120 seconds. The allowable deviation for weighing each plate is as follows:

① Concrete mix ratio: The deviation of each batch of concrete raw materials should comply with the following regulations: the allowable deviation for cement is ± 3%, the allowable deviation for fine aggregate (sand) is ± 4%, the allowable deviation for crushed stone is ± 2%, and the allowable deviation for water and additives is ± 3%.

② Concrete mix ratio: The deviation of each batch of raw materials for concrete should comply with the following regulations: the allowable deviation for cement and admixtures is ± 2%, the allowable deviation for coarse and fine aggregates is ± 3%, and the allowable deviation for water and admixtures is ± 2%.

4、 Temporary mixing plant organizational structure

The temporary mixing plant is directly constructed and managed by the project department. Based on the actual situation of the project, the construction quality of the project is ensured, and the management of the temporary mixing plant is strengthened in accordance with standardized requirements. The temporary mixing plant is managed by the project, supervised by the chief engineer, and equipped with one professional engineer, one full-time quality inspection engineer, one full-time safety officer, one construction dispatcher, and eight professional workers.

5、 Temporary mixing plant planning scheme

1. Overall planning and layout

The temporary mixing plant covers an area of approximately 500 square meters. Considering the feeding and transportation time of the mixer, it is considered to equip a forced mixer with a production capacity of 0.5m3 per plate and 15m3 per hour to ensure uninterrupted supply during peak construction periods. Temporary consideration is needed for small mixing plants to display operating procedures, safety precautions, and other signage.

2. Site handling of temporary mixing plant

⑴ The temporary mixing plant site shall be extensively leveled, with the principle of high in the middle and low in the surrounding areas, to facilitate the smooth discharge of surface water and avoid water accumulation on the site.

⑵ The road of the temporary mixing plant shall be hardened, with 20cm graded crushed stone or sand gravel laid below and 15cm concrete poured on the top as the surface layer.

3. Temporary mixing plant drainage plan

⑴ Temporary mixing plants shall be equipped with drainage ditches along both sides, with a net width of 30cm. The top elevation of the ditch and the elevation of the site should be considered uniformly. A drainage longitudinal slope of about 0.5% should be set at the bottom of the ditch to divert all water to the sewage treatment plant, and after sedimentation treatment, it should be discharged outside the site.

⑵ Set up hidden ditches inside the station to ensure that there is no water accumulation when there is heavy rainfall.

4. Construction of temporary mixing plant

⑴ Installation of mixer

① The installation of the mixer must be stable and firm, and a rain proof, smash proof or insulated work shed must be set up. The operating site should be kept clean regularly, and a sedimentation tank should be excavated outside the shed to remove cleaning machinery wastewater.

② The transmission mechanism, working device, clutch, and brake should be securely fastened, flexible and reliable, with complete protective covers.

③ The steel wire rope of the mixer shall not be scrapped due to corrosion, breakage, flattening, or other defects.

④ The safety hook on the machine body and the lifting ear on the hopper should be intact. When the hopper is raised, the safety hook should be hung.

⑤ For the mixer that needs to dig a feeding hopper pit, the area around the pit mouth should be padded and compacted, and the bottom surface of the feeding track frame should also be compacted or supported by wood behind the brick frame to prevent deformation of the track due to long working hours.

⑥ The mixer should be equipped with a rain shelter, with no mud or water around the machinery, clean and tidy, and complete with various signs.

⑦ The mixer should be equipped with a leakage protector with a parameter of 30M A × 0.1S for each machine, one switch, one leakage, and one box. The insulation resistance value of the motor should be greater than 0.5M Ω. There should be at least two protection neutral wires, and the instrument and indicator signals on the control panel should be accurate and reliable.

Construction of material storage warehouse

The material storage warehouse is constructed using a 24 wall method, with a retaining wall height of 1m and coated with cement mortar. The middle of the warehouse is high and the surrounding areas are low, with drainage holes reserved under the wall. The material storage bin consists of a back wall and a partition wall, and is horizontally divided into three bins, namely one qualified sand and gravel bin, one waiting for inspection sand and gravel bin, and one cement bin. Install blind drainage ditches around the partition walls in the silo. Set up a color steel tile shed on the top of the silo to prevent the external environment from affecting the sand and gravel materials. (Note: When not using cement, cover with colored strip cloth to prevent moisture)

⑶ Construction of sand and gravel screening zones

Set up screening equipment for sand and gravel materials to prevent excessive mud content and ensure that all indicators of sand and gravel materials meet construction needs.

⑷ Water pool

The water tank is located near the mixer and is constructed with 240mm thick bricks, with an average length and width of 2.5m and a height of 1m. It is then plastered with cement mortar.

6、 Implementation plan arrangement of planning scheme

7、 Measures to ensure continuous supply of concrete

1. Machinery such as mixers and loaders should be maintained and regularly inspected by dedicated personnel;

2. The material handler shall develop a material demand plan according to the production plan and promptly report it to the material department of the project department to ensure that sufficient raw materials such as cement, sand and gravel are prepared before mixing; Notify the tester to take samples in a timely manner after the raw materials enter the site;

3. After receiving the notification of raw material entry from the material handler, the tester shall promptly complete the sampling or inspection work. After the inspection results are available, the temporary mixing plant material handler shall be notified in a timely manner;

4. In order to ensure the production function of the temporary mixing plant, management and production personnel continuously improve their skills and techniques to meet the needs of large-scale production and ensure that their positions do not affect the production of the entire temporary mixing plant.

8、 Raw material quality control

1. Source control

The material department periodically visits various material sources to understand their production capacity and quality status based on the supply situation, ensuring sufficient and qualified material supply. If necessary, send personnel to the source to prevent the loading of unqualified materials.

2. Entry control

The laboratory is responsible for conducting on-site inspections of all raw materials for concrete.

3. Material handler's responsibility for controlling raw materials

The material handler is responsible for material statistics and developing material demand plans according to the production schedule. According to the material consumption situation in the ledger, report to the Material and Equipment Department of the project department. The Material and Equipment Department will calculate the material demand of each temporary mixing plant, arrange material supply in a unified manner, and the temporary mixing plant material personnel will be responsible for the initial inspection of materials entering the site. Those that are obviously unqualified will be ordered to return.

After passing the visual inspection, the goods can be unloaded and labeled, and a quality certificate (product qualification certificate) can be requested. Within 30 minutes of reaching an inspection batch, the temporary mixing plant tester will be notified to conduct sampling inspection, and two copies of the "Notice of Materials Entering the Site" will be filled out, with each party keeping one copy. Based on the feedback from the tester, the material handler will re label or process the materials. The material handler is responsible for covering the materials to prevent contamination such as rain and dust.

4. Quality responsibility of testers

Testers are responsible for sampling, sending for inspection, reporting for inspection, and providing feedback on inspection results of raw materials. After receiving the notification of raw material entry from the material handler, the tester shall promptly complete the sampling or inspection work. After the inspection results are available, the temporary mixing plant material handler shall be notified in a timely manner.