Weighing equipment for concrete material

Abstract

A measuring apparatus (1) for concrete materials, comprising an aggregate hopper (3) as aggregate feed means for feeding fine aggregate (2) as aggregate, a water supply pipe (4) as water supply means, an aggregate measuring bin (51) for storing and measuring the fine aggregate (2) supplied from the aggregate hopper (3), a measuring tank (5) for storing the fine aggregate (2) supplied from the aggregate hopper (3) as water-immersed aggregate together with water supplied through the water supply pipe (4), a load cell (6) as water-immersed aggregate mass measuring means for measuring the mass of the water-immersed aggregate in the measuring tank, an electrode sensor (7) as water level measuring means for measuring the water level of the water-immersed aggregate in the measuring tank (5), and a water level holding device (8) as water level holding means for holding the water level of the water-immersed aggregate in the measuring tank (5) at a desired water level.

Description

technical field [0001] The present invention relates to a metering device for metering aggregate and water concrete materials in different states of surface water. Background technique [0002] When preparing concrete on site, since the amount of water has a great influence on the strength of concrete, etc., strict management is required during mixing. Moreover, the aggregate used as a preparation material, due to reasons such as storage conditions and climatic conditions, its water content When aggregates are used in a wet state, the amount of water in the concrete increases by as much as the surface water of the aggregates, while when aggregates are used in a dry state, the effective water absorption in the concrete is reduced by as much of water. [0003] Therefore, it is very important to maintain the quality of concrete by supplementing the amount of water during mixing according to the degree of dryness and wetness of the aggregate to produce concrete according to the...

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Problems solved by technology

[0006] However, this measurement method only estimates the surface water ratio of all aggregates based on a small amount of aggregate samples. On the one hand, in any case, the accuracy of the measurement results is limited; , it needs to be heated with a furnace, so if an amount close to the amount of aggregate actually used is used as a sample, it will be unrealistic in terms of economy and time.

[0007] In addition, although measures such as visually confirming the state of stirring by the operator, or adjusting the amount of stirring water with the load current of the mixer as a reference are adopted to make up for the above-mentioned problems, due to the low accuracy of this method itself , as a result, it is still not possible to expect a safety factor close to 20% in terms of strength, and the problem of uneconomical ratios will also arise.

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