Method and device for measuring water content of sandstone, concrete generating system and mixing station

Abstract

The embodiment of the invention provides a method and a device for measuring water content of sandstone, a concrete generating system and a mixing station, belonging to the technical field of concreteproportioning. The method comprises the following steps of: establishing a water content calculation model considering various factors such as sandstone temperature, density, and quality; obtaining aconcrete proportioning model based on the water content calculation model; and calculating and obtaining the amount of the sandstone and the water actually needed in the concrete production process based on the concrete proportioning model, according to the microwave reflection values and the temperature values of the sandstone measured by a water content sensor and a temperature sensor, and thereference sandstone amount and the reference water quantity provided by a material and formula management module. The invention can obtain better concrete quality by overcoming the shortcomings that the water content of the sandstone is calculated by only considering the water content in the sandstone, and there is a large error between the obtained concrete proportioning and the actual concrete proportioning.

Description

Technical field [0001] The present invention relates to concrete proportioning technology, in particular to a method and device for measuring water content of sand and gravel, a concrete generation system and a mixing station. Background technique [0002] Concrete is widely used in building construction and other fields. According to different uses of concrete, the proportion of sand and water used to make concrete varies. The proportion of sand and water required for concrete depends on the moisture content of sand and gravel. The higher the moisture content, the lower the amount of water. figure 1 It is the flow chart of the existing sand and gravel moisture content measurement. The existing sand and gravel moisture content measurement is to first detect the microwave reflection value of the sand and gravel through the moisture content probe of the moisture content sensor, and then the PLC control system performs the microwave reflection value Collect, process and calculate, a...

AI Technical Summary

Problems solved by technology

figure 1 It is the flow chart of the existing water content measurement of sand and gravel. The existing water content measurement of sand and gravel is to first detect the microwave reflection value of sand and stone through the water content probe of the water content sensor, and then the PLC control system performs the microwave reflection value Acquisition, processing and calculation, and finally obtain the moisture content based on the relationship between the moisture content and the microwave reflection value, so as to obtain the moisture content of the measured sand and gravel. However, in the actual production process of concrete, the detection of moisture content is restricted by many factors , such as the mud content of the sand, the density and thickness of the sand, and the temperature, etc., only measure the microwave reflection value representing the water content of the sand, which cannot objectively reflect the true value of the water content of the sand, and thus cannot guarantee Accuracy of Concrete Proportion

Specifically, if the water content detection value of the sand is greater than the actual value, the actual water consumption is less than the rated amount, resulting in a decrease in the slump of the concrete; otherwise, serious hazards such as bleeding and segregation of the concrete will occur.

Images