Method for determining bulk density and void ratio of wet bulk solid

A technology of bulk density and measurement method, applied in the field of mine tailings filling, can solve the problems of not considering the possible influence of water, sensitive defects of compaction factors, etc., and achieve the effect of improving strength

Inactive Publication Date: 2017-05-31
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem in the prior art solved by the present invention is: in order to overcome the defect of sensitivity to compaction factors and not considering the possible influence of water in the traditional dry accumulation method, a kind of wet bulk powder with different fineness can be used for testing. How to measure the bulk density of a body

Method used

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  • Method for determining bulk density and void ratio of wet bulk solid
  • Method for determining bulk density and void ratio of wet bulk solid
  • Method for determining bulk density and void ratio of wet bulk solid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for measuring bulk density and void ratio of wet bulk is realized through the following steps:

[0028] (S1) According to the selected wet dispersion W / CM value, where W represents water and CM represents cementitious material, prepare water, ordinary Portland cement and fly ash of required weight, and place them in separate In the container, spare;

[0029] (S2) Add ordinary portland cement into the mixing bowl and dry mix for two minutes to improve the uniformity of the cementitious material sample;

[0030] (S3) Put the ordinary Portland cement stirred in the mixing bowl 1 into the original container, and add all the water of the required weight into the empty mixing bowl 1;

[0031] (S4) Add half of the ordinary Portland cement and half of the fly ash into the mixing bowl filled with water, start the stirrer and stir for three minutes at low speed;

[0032] (S5) Divide the remaining ordinary portland cement and fly ash into four equal parts and add them t...

Embodiment 2

[0042] A method for measuring bulk density and void ratio of wet bulk is realized through the following steps:

[0043] (S1) According to the selected wet dispersion W / CM value, where W represents water and CM represents cementitious material, prepare the required weight of water, ordinary Portland cement and silica fume, and put them in separate containers inside, spare;

[0044] (S2) Add ordinary Portland cement into the mixing bowl 1 and dry mix for two minutes to improve the uniformity of the cementitious material sample;

[0045] (S3) Put the ordinary Portland cement stirred in the mixing bowl 1 into the original container, and add all the water of the required weight into the empty mixing bowl 1;

[0046] (S4) Add half of the ordinary Portland cement and half of the silica fume into the mixing bowl filled with water, start the stirrer and stir at a low speed for three minutes;

[0047] (S5) Divide the remaining ordinary portland cement and silica fume into four equal p...

Embodiment 3

[0057] A method for measuring bulk density and void ratio of wet bulk is realized through the following steps:

[0058] (S1) According to the selected wet dispersion W / CM value, where W represents water and CM represents cementitious material, prepare water, ordinary Portland cement, fly ash and silica fume of required weight, and place them respectively In a separate container, set aside;

[0059] (S2) Add ordinary Portland cement into the mixing bowl 1 and dry mix for two minutes to improve the uniformity of the cementitious material sample;

[0060] (S3) Put the ordinary Portland cement stirred in the mixing bowl 1 into the original container, and add all the water of the required weight into the empty mixing bowl 1;

[0061] (S4) Add half of ordinary Portland cement, half of fly ash and half of silica fume into a mixing bowl filled with water, start the stirrer and stir for three minutes at a low speed;

[0062] (S5) Divide the remaining ordinary Portland cement, fly ash...

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Abstract

The invention discloses a method for determining the bulk density and the void ratio of a wet bulk solid. The method comprises the steps of preparing raw materials required for an experiment according to a selected W/CM value, putting a cementing material into a mixing bowl for dry mixing, putting the mixed cementing material back to an original container and feeding all water required for the experiment in an empty pot body; feeding the mixed cementing material into the mixing bowl for mixing by five times, putting the mixed mixture into a cylindrical container to measure the bulk density of the mixture; and finally calculating the bulk density and the void ratio of the wet bulk solid according to experimental data and derived formula. By adopting a wet stacking method, the problems that a traditional method for testing the bulk density of a dry bulk solid is easily affected by a compacting factor and the influence which can be caused by a liquid to a sample are solved. Compared with the prior art, the method disclosed by the invention has the advantages that the bulk density and the void ratio of the wet bulk solid can be simply, quickly and accurately determined and the method can be applied to optimal proportion section of the wet bulk solid.

Description

technical field [0001] The invention belongs to mine tailings filling technology, in particular to a method for measuring bulk density and void ratio of wet bulk. Background technique [0002] Wet bulk density is a key factor affecting the properties (strength, fluidity, and workability) of artificial materials such as mine fillings, concrete, and mortar. Accurately detecting the bulk density of materials at different moisture contents plays an important guiding role in determining the mixing ratio of aggregates with different particle sizes. In order to improve the fluidity of cement-based materials on the basis of ensuring the strength, it is necessary to optimize the proportion of coarse and fine aggregates and increase the wet packing density of aggregates, thereby reducing water consumption and water-cement ratio. [0003] Experiments have proved that concrete / mortar / tailings filling materials can further improve performance by maximizing the packing density of the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/02
CPCG01N9/02
Inventor 焦华喆韩振宇陈新明王云飞罗平平孙冠东严少洋刘子璐杨亦轩陈峰宾
Owner HENAN POLYTECHNIC UNIV
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