In the concrete production process, sand and gravel aggregates play a vital role. Therefore, it is necessary to do a good job in the production quality control and cost control measures of sand and gravel aggregates. This article shares 4 key points of quality control in the production of concrete aggregates.
1. Effectively protect sand and gravel aggregates
In the process of stacking finished aggregates, it is necessary to set up product labels according to the specific conditions of different aggregates. If there is no separation wall for natural stacking, it is necessary to ensure that the spacing of each specification of aggregate is more than three meters. At the same time, make sure that the aggregates are stacked neatly and orderly.
In addition, it is necessary to build a blind ditch drainage system in the finished aggregate storage yard, so as to ensure rapid dehydration when washing the aggregate, and ensure that the moisture content of the aggregate meets the moisture content requirements of the concrete production process.
2. Strictly control the particle size of sand and gravel aggregates
The screening link is the most important link to control the particle size of the aggregate. According to the particle size requirements and grading requirements of concrete aggregates, advanced crushing equipment, vibrating sand and standard aperture screens are used to realize the screening production of sand and gravel aggregates, and to ensure that the finished sand and gravel aggregates produced are in the project The concrete classification quality standards and regulations used are compatible.
When screening coarse aggregates, square mesh screens mainly made of polyurethane materials can be used. The size of the mesh should be selected reasonably according to the gradation requirements of the aggregates. Generally, the square mesh screens are 80mm, 40mm, 20mm, Specifications such as 10mm and 5mm.
During the production process, the production system can be randomly checked. It should also be noted that every month or every 20,000 to 30,000 square meters of sand and gravel aggregates are produced, the screen should be repaired or replaced in time to ensure that the production equipment is in a stable state.
3. Control the mud content of sand and gravel aggregates
When controlling the sludge content, the inclination angle of the screen and the method of controlling the input of the screened material are mainly used to achieve the purpose of controlling the sludge content of the raw materials. In addition, a stable flushing system can also be used to flush the raw materials, usually the diameter of the water supply branch pipe is between 5 mm and 8 mm.
During the flushing process, the water pressure can be adjusted to a proper pressure, and the adjacent water spray holes must ensure that the water sprayed has a certain degree of intersectionality, so that it can evenly cover the entire screen to ensure the raw material Washing quality. (Click to view the previous article "What should I do if the mud content of sand and gravel aggregate is too high? Three countermeasures to improve production efficiency and stone quality")
4. Strictly control the source of aggregate
Before the wool mining, the covering layer on the top of the stockyard needs to be completely removed. Only in this way can it be ensured that there will be no debris such as grass roots and mulch on the mining surface. It is best to complete the cleaning of the covering layer at one time, and reserve a certain width of the protective area to prevent vibration during the mining process, causing the covering soil at the boundary position to slip and mix into the wool, which will affect the quality of the wool.
In the production process of sand and gravel aggregates, if the production is not strictly in accordance with the technical specifications, it will directly affect the quality of the finished aggregate and cause the production cost of sand and gravel aggregates to rise. Therefore, it is necessary to strictly control the production process of sand and gravel aggregates, strengthen the management of the production process, carry out strict and effective production monitoring operations, and control production costs. Only in this way can the production cost of sand and gravel aggregates be reduced on the basis of ensuring the quality of sand and gravel aggregate production, which is very beneficial to promote the long-term development of the sand and gravel aggregate production industry.
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Phoenix Mining Equipment (Shanghai) Co., Ltd. is a Sino-US joint venture that produces and sells various types of crushing equipment, sand making equipment, milling equipment, crushing and screening equipment and other complete sets of sand and ore production line equipment. Scie...