Tailing sand mortar dry blend and mortar preparation method thereby

A technology of tailings sand and dry mixture, which is applied in the field of building materials, can solve the problems of limited application range, low economic benefits, and inability to solve tailings sand, etc., and achieve the goal of inhibiting volume shrinkage, reducing usage, and economical and practical resource utilization. Effect

Inactive Publication Date: 2012-07-25
北京建筑工程学院
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  • Description
  • Claims
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Problems solved by technology

In the existing technology, technologies related to the resource utilization of tailings sand are very rare, and they are basically concentrated in the field of concrete preparation. However, the application range of this technology is limited and the economic benefits are not high, so it cannot solve the problem of a large number of tailings sands.

Method used

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  • Tailing sand mortar dry blend and mortar preparation method thereby
  • Tailing sand mortar dry blend and mortar preparation method thereby

Examples

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Effect test

preparation example Construction

[0043] Such as figure 1 Shown, a kind of preparation method of tailings sand dry-mixed mortar, has applied tailings sand mortar dry-mixed material described in the above-mentioned technical scheme, and it specifically can comprise the following steps:

[0044] Step A, configuring raw materials according to the component content of the tailings sand mortar dry mix;

[0045] Specifically, select natural sand and tailings sand dried to constant weight, and mix them with ordinary Portland cement, cellulose ether, naphthalene-based water reducer and redispersible Latex powder mixed evenly.

[0046] In step B, add water to the prepared raw materials and stir until the consistency of the mixture of raw materials and water reaches 85mm-95mm, and the finished mortar can be obtained.

[0047] It can be seen that the embodiment of the present invention is suitable for preparing ordinary masonry mortar, plastering mortar and bonding mortar. The embodiment of the present invention uses ...

Embodiment 1

[0054] According to the component content ratio provided in Example 1 in Table 1, the natural sand and tailings sand were dried to constant weight, and then 3.26 kg of ordinary Portland cement, 3.26 kg of natural sand, 7.62 kg of tailings sand, cellulose 2.83g of ether, 141.4g of naphthalene-based water reducer, 7.07g of redispersible latex powder, and mix well; add water and stir until the consistency reaches 90mm, and the finished mortar can be obtained. After calculation, the specific performance of the mortar is as follows:

[0055] (1) Wet bulk density: 1916kg / m3;

[0056] (2) Water retention rate: 94%;

[0057] (3) 7d compressive strength: 7.8MPa;

[0058] (4) 28d compressive strength: 11.8MPa;

[0059] (5) 7d flexural strength: 3.1MPa;

[0060] (6) 28d flexural strength: 4.6MPa;

[0061] (7) 14d shrinkage rate: 0.39%;

[0062] (8) 28d shrinkage rate: 0.41%.

[0063] It can be seen that the mortar prepared by using the tailings sand mortar dry mix not only has goo...

Embodiment 2

[0065] According to the component content ratio provided in Example 2 in Table 1, the natural sand and tailings sand were dried to constant weight, and then 3.26 kg of ordinary Portland cement, 3.26 kg of natural sand, 7.62 kg of tailings sand, cellulose 2.83g of ether, 169.68g of naphthalene-based water reducer, 21.21g of redispersible latex powder, and mix evenly; add water and stir until the consistency reaches 92mm, and the finished mortar can be obtained. After calculation, the specific performance of the mortar is as follows:

[0066] (1) Wet bulk density: 1844kg / m3;

[0067] (2) Water retention rate: 97.5%;

[0068] (3) 7d compressive strength: 8.9MPa;

[0069] (4) 28d compressive strength: 13.3MPa;

[0070] (5) 7d flexural strength: 2.4MPa;

[0071] (6) 28d flexural strength: 3.6MPa;

[0072] (7) 14d shrinkage rate: 0.29%;

[0073] (8) 28d shrinkage rate: 0.39%.

[0074] It can be seen that the mortar prepared by using the tailings sand mortar dry mix not only h...

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Abstract

The invention discloses a tailing sand mortar dry blend and a mortar preparation method thereby. The tailing sand mortar dry blend comprises the following raw materials of common portland cement, sand, cellulose ether, naphthalene formaldehyde water reducer and re-dispersible latex powder, wherein the mass ratio of the common portland cement to the sand is 1:2-1:4; the mass of the cellulose ether accounts for 0.02-0.1% of the total mass of the common portland cement and the sand; the mass of the naphthalene formaldehyde water reducer accounts for 0.5-1.2% of total mass of the common portland cement and the sand; the mass of the re-dispersible latex powder is 0.05-0.4% of the total mass of the common portland cement and the sand; and the sand comprises 60-80wt% of tailing sand and the balance of natural sand. According to the embodiment of the tailing sand mortar dry blend, the use amount of the natural sand in the mortar is reduced, and the problem that the natural sand is in shortage is alleviated. In addition, the recycling reasonable application of the tailing sand is realized, and the preparation cost of the mortar is lowered.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a tailings sand mortar dry mix and a mortar preparation method using the dry mix. Background technique [0002] Tailings sand refers to the solid waste left after the ore mined in the mine has been processed through the beneficiation process, and most of its components contain minerals that have not been fully recovered. At present, the annual output of tailings sand in my country is as high as 500 million tons, most of which are regarded as piled up and landfilled waste, which not only makes the mineral resources not be rationally used, but also occupies a large amount of land resources, causing environmental damage. pollute. In the existing technology, technologies related to the resource utilization of tailings sand are very rare, and they are basically concentrated in the field of concrete preparation. However, the application range of this technology is limited and the econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 周文娟陈家珑林松周理安李飞路宏波
Owner 北京建筑工程学院
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