Several key quality control points in the concrete mixing process

The experimental personnel of the mixing plant not only need to do a good job in quality control of each link before production, but also focus on controlling the concrete mixing process. The main quality control points of the concrete mixing plant process are as follows.

1. Talent cultivation

Organize professional training and experimentation for laboratory personnel to enhance the professional technical skills of quality controllers and operators.

2. Control of measuring scales in mixing plants

Before starting the work of the mixing plant, it is necessary to perform zero point calibration on the measuring equipment. In the concrete production process, operators should control the measurement and cumulative error of each batch of ingredients, so that the measurement error of the factory concrete ingredients meets the allowable deviation of raw material measurement specified in the pre mixed concrete standard. At the same time, the quality controller needs to randomly inspect the concrete mixer truck and weigh it before the concrete leaves the factory to check whether the concrete density meets the requirements.

3. Confirmation of raw materials

The quality controller of the mixing plant needs to check in advance the quality of the original records of raw materials such as sand and stone, and whether the powder silo number and the variety of raw materials in the silo correspond.

4. Concrete mixing and control of water consumption per cubic meter

The operators of the concrete mixing plant should observe and listen carefully. Take a look at the changes in the ammeter during the concrete mixing process; Check the stirring and flow of the concrete mixture; Check the concrete condition at the discharge port of the mixer three times. Yi Ting refers to listening to the sound of concrete cutting.

5. Adjustment of concrete mix proportion

During the production process of concrete, the quality controller needs to adjust the "Concrete Mix Adjustment Notice" within the specified range based on the concrete mix proportion formulated by the laboratory. The principle of adjustment is to have a reasonable basis to prevent arbitrary adjustments; The water cement ratio remains unchanged during adjustment; Make good records of adjustments.

Note: The article is sourced from "Commercial Concrete" 2019. If there is any infringement, please contact us to delete it. Thank you.