A method for measuring the adsorption performance of machine-made sandstone powder

A technology of adsorption performance and machine-made sand, which is applied in the direction of removing certain components and weighing, etc., can solve the problems of high requirements for test operators, environmental pollution by operators, and low test efficiency, and achieves low requirements for experimental operators and operation. Strong feasibility and distinct effect

Inactive Publication Date: 2021-02-09
CHINA ACAD OF BUILDING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common machine-made sandstones include limestone, granite, basalt, tailings, etc., and some basalt and tailings machine-made sands contain a certain amount of iron hydroxide. When judging the basalt and tailings machine-made sand with a large amount of iron hydroxide, it may lead to misjudgment that the expansive clay minerals in basalt and tailings machine-made sand are high
[0006] 2) Requirements for reagents, materials, and equipment are relatively complex: methylene blue solution needs to be prepared, and the shelf life of methylene blue solution is only 28 days; quantitative filter paper (quick); impeller agitator needs to be purchased; pipette or graduated syringe Or alkaline burette, etc.
[0007] 3) The requirements for the test operators are high: due to the difference in the width of the meniscus observed by each person, the test results will have different degrees of error
[0008] 4) For machine-made sand with relatively high methylene blue (MB) value, the test efficiency is low
[0009] 5) Potential hazards to operators and environmental pollution: when preparing methylene blue solution, it is difficult for methylene blue powder particles to avoid entering the respiratory tract, and the discarded methylene blue solution also causes environmental pollution

Method used

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  • A method for measuring the adsorption performance of machine-made sandstone powder
  • A method for measuring the adsorption performance of machine-made sandstone powder
  • A method for measuring the adsorption performance of machine-made sandstone powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1) Take Yunnan limestone machine-made sand A as the sample, take the machine-made sand and dry it to a constant weight of 3100g in total, weigh 500g of the sample, add a 75μm square hole sieve, put the set of sieves on the shaker, shake for 10min, and remove Cover the sieve, pour out all the rest of the cover sieve, and take the stone powder at the bottom of the sieve for later use; weigh 500g of the sample again, and carry out the same sieving until the cumulative amount of stone powder at the bottom of the sieve reaches 150g;

[0051] 2) Determination of the fluidity of the mortar in the reference group: Weigh 450g of cement, 1350g of sand, 180g of water, and 3.5g of water reducing agent, and conduct the test according to the fluidity test of cement mortar, and record that the fluidity of the mortar in the reference group is 181mm;

[0052]3) Determination of the fluidity of the mortar in the experimental group: Weigh 315g of cement, 135g of stone powder, 1350g of sand...

Embodiment 2

[0062] 1) Use Yunnan limestone machine-made sand B as the sample, take the machine-made sand and dry it to a constant weight of 3000g in total, weigh 500g of the sample, add a 75μm square hole sieve, put the set of sieve on the shaker, shake for 10min, and remove Cover the sieve, pour out all the rest of the cover sieve, and take the stone powder at the bottom of the sieve for later use; weigh 500g of the sample again, and carry out the same sieving until the cumulative amount of stone powder at the bottom of the sieve reaches 150g;

[0063] 2) Determination of the fluidity of the mortar in the reference group: Weigh 450g of cement, 1350g of sand, 180g of water, and 3.5g of water reducing agent, and conduct the test according to the fluidity test of cement mortar, and record that the fluidity of the mortar in the reference group is 181mm;

[0064] 3) Determination of the fluidity of the mortar in the experimental group: Weigh 315g of cement, 135g of stone powder, 1350g of sand,...

Embodiment 3

[0074] 1) Take Yunnan granite machine-made sand as the sample, take the machine-made sand and dry it to a constant weight of 3200g, weigh 500g of the sample, add a 75μm square hole sieve, put the sieve on the shaker, shake for 10min, and take off the cover Sieve, pour out all the rest of the cover sieve, take the stone powder at the bottom of the sieve for later use; weigh 500g of the sample again, and carry out the same sieving until the cumulative amount of stone powder at the bottom of the sieve reaches 150g;

[0075] 2) Determination of the fluidity of the mortar in the reference group: Weigh 450g of cement, 1350g of sand, 180g of water, and 3.5g of water reducing agent, and conduct the test according to the fluidity test of cement mortar, and record that the fluidity of the mortar in the reference group is 181mm;

[0076] 3) Determination of the fluidity of the mortar in the experimental group: Weigh 315g of cement, 135g of stone powder, 1350g of sand, 180g of water, and 3...

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Abstract

The invention relates to a method for measuring the adsorption performance of machine-made sandstone powder, which belongs to the technical field of civil engineering materials. Including: drying the machine-made sand to constant weight, adding a stone powder sieve for grading and sieving, and taking the stone powder at the bottom of the sieve for use; through the fluidity test of the mortar, it is determined that the fluidity of the benchmark group reaches the specified range at a low water-binder ratio The amount of water reducing agent; add the above-mentioned sieve bottom stone powder to the specified amount, carry out the mortar fluidity test according to the mortar mix ratio of the reference group, measure the fluidity of the rubber sand in the experimental group, and calculate the fluidity ratio according to the formula. Compared with the MB value of machine-made sand methylene blue, the assay method of the present invention has the characteristics of high efficiency, simple requirements for instruments and equipment, strong operational feasibility, and obvious distinction of test results, and the measurement results can better reflect whether the machine-made sand powder is There is an overall index of expansive clay minerals and their content, which has a better guiding role in controlling the content of mechanism sand and gravel powder.

Description

technical field [0001] The invention relates to a method for measuring the adsorption performance of machine-made sandstone powder, which belongs to the technical field of civil engineering materials. Background technique [0002] In recent years, the scale of civil engineering infrastructure construction in my country is huge, and high-quality river sand resources are increasingly scarce. Manufactured sand resources are abundant, quality controllable, and low in cost, and have been widely used in my country. With the enhancement of environmental protection awareness, the mineable river sand resources are getting less and less, and the machine-made sand will be more widely used in our country. [0003] The adsorption performance of stone powder with a particle size of less than 75 μm in machine-made sand is an important technical index for evaluating the performance of machine-made sand. At present, the relevant machine-made sand standards in my country generally use the tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 高超贺阳周永祥夏京亮王晶王祖琦宋普涛王伟张大朋周郅人
Owner CHINA ACAD OF BUILDING RES
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