Method for comprehensively measuring saturated surface dry water absorption of artificial sand

A technology of water absorption and artificial sand, applied in soil material testing, measuring devices, instruments, etc., can solve problems such as inaccurate detection, and achieve the effect of strong practicability

Active Publication Date: 2021-04-30
SINOHYDRO BUREAU 16 CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of inaccurate detection existing in the detection of the dry water absorption rate of the existing artificial sand saturation surface, and to provide a comp

Method used

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  • Method for comprehensively measuring saturated surface dry water absorption of artificial sand
  • Method for comprehensively measuring saturated surface dry water absorption of artificial sand
  • Method for comprehensively measuring saturated surface dry water absorption of artificial sand

Examples

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Embodiment 1

[0031] Example 1, a method for comprehensively measuring the dry water absorption rate of artificial sand saturation surface, used to detect tuff artificial sand in Yongtai pumped storage power station, the measuring steps are:

[0032] 1. The tuff artificial sand of Yongtai Pumped-storage Power Station has a fineness modulus of 2.79; take 20kg of dried artificial sand samples, use a 0.08mm sieve to sieve the artificial sand samples into upper and lower parts, and record the upper and lower parts Fraction of the total sample: the content of particles greater than or equal to 0.08mm in the sample is 88.3%; the content of particles smaller than 0.08mm is 11.7%;

[0033] 1.2. The saturated surface dry water absorption rate of the particles on the 0.08mm sieve is measured by "2.2 Apparent Density and Water Absorption Test of Sand Material" in SL352-2006 "Hydraulic Concrete Test Regulations", and the saturated surface dry water absorption rate is 0.83%;

[0034] 1.3. The weight of ...

Embodiment 2

[0052] Example 2. The 11th detection of continuous engineering, limestone artificial sand of Guanling Hydropower Station in Guizhou, fineness modulus 2.97; take 10kg of dried artificial sand samples, and use a 0.08mm sieve to sieve the artificial sand samples into upper and lower sieves Two parts, record the fraction of the above-sieve and under-sieve parts in the total sample: the content of particles greater than or equal to 0.08mm in the sample is 88.6%; the content of particles smaller than 0.08mm is 11.4%;

[0053] 2.2. Among them, the saturated surface dry water absorption rate of the particles on the 0.08mm sieve is 1.05%;

[0054] 2.3. The weight of the part under the sieve is 1140g. Due to the continuity of the project, except for the first detection according to the step 1.3 of the above example, the average value of the saturated surface dry moisture content of the previous detection or several detections can be used as a preliminary detection. Estimated, the averag...

Embodiment 3

[0062] Embodiment 3. Zhouning pumped storage power station granite artificial sand, fineness modulus 2.70; Get the artificial sand sample of 20kg drying, use 0.08mm sieve to sieve the artificial sand sample into two parts, the upper part and the lower part of the sieve, and record the upper and lower parts of the sieve. The fraction of the under-sieve part in the total sample: the content of particles greater than or equal to 0.08mm in the sample is 91.7%; the content of particles smaller than 0.08mm is 8.3%;

[0063] 3.2. Among them, the saturated surface dry water absorption rate of the particles on the 0.08mm sieve is 0.88%;

[0064] 3.3. The weight of the part under the sieve is 1660g, and the dry moisture content of the saturated surface of the stone powder detected last time is 9.0%. In order to get higher accuracy, take 9.0% as the middle value, each 150g, a total of 5 pieces, make a stone powder sub-sample every 1%, according to 7%, 8%, 9%, 10%, 11%, add Distilled wat...

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Abstract

The invention discloses a method for comprehensively measuring saturated surface dry water absorption of artificial sand, which is characterized by comprising the following steps: 1, taking a certain amount of artificial sand sample, screening the artificial sand sample into an oversize part and an undersize part by using a 0.08 mm sieve, and recording the fractions of the oversize part and the undersize part in the total sample; 2, measuring the oversize part by using a natural sand saturated surface dry water absorption test method; 3, preparing a plurality of stone powder sub-samples with different water contents from the undersize part according to the estimated saturated surface dry water absorption rate, sequentially determining the water contents at equal intervals, and determining the saturated surface dry water absorption rate of the stone powder sub-samples; and 4, multiplying the saturated surface dry water absorption of the oversize part by the fraction of the oversize part, and multiplying the saturated surface dry water absorption of the stone powder by the fraction of the undersize part to obtain the saturated surface dry water absorption of the artificial sand sample. According to the invention, the artificial sand is sieved into the oversize part and the undersize part by the 0.08 mm sieve, the measurement result is accurate, the practicability is strong, and the method can be applied to the field with weaker test conditions, and the data can be output on the field to give the result.

Description

technical field [0001] The invention belongs to the detection of artificial sand, in particular to the measurement of the water absorption rate of artificial sand. Background technique [0002] The dry water absorption of the sand saturated surface is an important parameter in the design of the hydraulic concrete mix ratio and the adjustment of the actual water consumption of the on-site mixing plant. At present, there are mainly two methods for testing the dry water absorption rate of saturated surface of artificial sand at home and abroad: wet trace method and mold test method. Testing, the test results are quite different; for example, in the domestic large-scale hydropower projects that use artificial sand that the author participated in the construction and inspection, the samples were sent to different test units for comparison and testing, and the test results were also quite different, for example: Guizhou When the content of stone powder (<0.08mm) in the limesto...

Claims

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Application Information

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IPC IPC(8): G01N11/12G01N33/24
CPCG01N11/12G01N33/246
Inventor 肖祖阔吴金灶朱仲魏建忠陈冰冯秀英陈琼英熊贵英陈平华
Owner SINOHYDRO BUREAU 16 CO LTD
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