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Quick detection method for fine aggregate water content

A detection method, fine aggregate technology, applied in the direction of using material absorption and weighing, etc., can solve the problems affecting the quality of concrete slump, and achieve the effect of shortening the hidden danger of quality

Inactive Publication Date: 2012-02-08
SHANGHAI ERSHIYE CONSTR CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The test time for the water content of the aggregate needs to be more than 30 minutes, which cannot meet the requirements of timely adjustment in the production of concrete. During this period, some concrete will have hidden dangers that may affect the quality of the concrete slump due to the untimely adjustment of the water content of the aggregate.

Method used

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  • Quick detection method for fine aggregate water content

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Embodiment Construction

[0019] A kind of rapid detection method of moisture content of fine aggregate, it comprises

[0020] Step 1: Fine aggregate sampling, weighing the fine aggregate with a representative sample m 0 , accurate to 1g;

[0021] Step 2: Put all the fine aggregate weighed in Step 1 into a container with a predetermined scale line, add water to about below the scale line, stir to remove air bubbles, add water again to the scale line, and weigh its mass m 1 , accurate to 1g;

[0022] Step 3: Empty and wash the scaled container containing fine aggregate, fill it with water to the scaled line again to ensure that there are no air bubbles on the surface, and weigh its mass m 2 Accurate to 1g;

[0023] Step 4: Calculate according to the formula:

[0024] Moisture content of fine aggregate (%) = (m 0 -(m 0 +m 2 -m 1 )×γ s )×100% / m 0

[0025] In the formula: m 0 - To test the sample quality, not less than 350g and accurate to 1g

[0026] m 1 - When adding water to 1L after loadi...

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Abstract

The invention relates to a concrete production quality detection method, in particular to a detection method for fine aggregate water content, comprising the following steps: step 1, carrying out sampling on fine aggregate to get fine aggregate m0 which represents a sample; step 2, putting the weighed fine aggregate of the step 1 in a container with a predetermined graduation line, adding water below the graduation line, stirring to eliminate bubbles, adding water again until reaching the graduation line, and weighing with a weight of m1; step 3, emptying and washing the container which has the graduation line and is filled with the fine aggregate, adding water again until reaching the graduation line, guaranteeing no bubble on the surface, and weighing with a weight of m2; step 4, calculating according to the following formula: fine aggregate water content (%) = ( m0-(m0+m2-m1)*gamma s ) * 100 % / m0; and step 5, simultaneously carrying out parallel test twice, taking the arithmetic average of the two results to obtain the fine aggregate water content. According to the invention, the detection of fine aggregate water content can be realized quickly, thereby being helpful for reducing concrete quality hidden troubles.

Description

technical field [0001] The invention relates to a method for detecting the quality of concrete production, in particular to a method for detecting the moisture content of fine aggregate. Background technique [0002] At present, most concrete production enterprises test the moisture content of fine aggregate by weighing 500g of fine aggregate in an oven at 105°C ± 5°C for 30 minutes and drying to constant weight, weighing the dried sample weight, and accurately to 1g, calculate the moisture content of fine aggregate according to the following formula: [0003] Moisture content of fine aggregate = (weight before drying - weight after drying) × 100% / weight before drying. [0004] The water content of the aggregate needs to be tested for more than 30 minutes, which cannot meet the timely adjustment requirements in the production of concrete. During this period, there will be some hidden dangers in the quality of the concrete slump due to the untimely adjustment of the water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
Inventor 王秋燕
Owner SHANGHAI ERSHIYE CONSTR CO LTD
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