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Preparation method and device of microbial coral sand brick

A coral sand and microorganism technology, applied in the field of chemistry, can solve the problems of low efficiency of curing loose coral sand, unfavorable engineering application, long curing time, etc., and achieve the effects of short cycle, low cost and simple operation.

Active Publication Date: 2017-07-04
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with publication number 103773376A discloses a method for curing loose coral sand by using microorganisms, but the efficiency of curing loose coral sand by using this method is not high, and the curing time is long, usually 3 to 6 days, which is not conducive to engineering applications

Method used

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  • Preparation method and device of microbial coral sand brick
  • Preparation method and device of microbial coral sand brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, the equipment of microbial solidification loose coral sand

[0025] Equipment for microbial solidification of loose coral sand, with structures such as figure 1 As shown, it includes a DC power supply 1 and a mold 2 with positive and negative poles and wires, wherein the positive and negative poles of the DC power supply are both graphite electrodes 6; the mold includes a rectangular parallelepiped sand box 3 with an unclosed upper surface and a fixed electrode installed thereon. The surface is not closed and the bottom inner wall is equipped with a bottom box 4 with fixed electrodes. The height of the bottom box 4 is higher than that of the sand box 3. A drain port 5 is arranged on the bottom outer wall of the bottom box 4 for discharging the mixed solution after reaction. Bottom box 4 and sand box 3 are all spliced ​​by transparent plywood, the plywood thickness is preferably 10mm, and the upper surface is not closed, and the splicing place is coated wit...

Embodiment 2

[0026] Embodiment 2, utilize loose coral sand to prepare the method for coral sand brick

[0027] Utilize the method that the equipment of the microbial solidification loose coral sand of embodiment 1 prepares coral sand brick, comprises the steps:

[0028] (1) Take 2500g of coral sand with a particle size less than 2.5mm and pack it into a sand box covered with fiber cotton. The proportioning ratio of each particle size of coral sand is as shown in Table 1, and then check whether the outer parts are leaking;

[0029] Table 1. Coral sand particle size ratio

[0030] Granular group gravel fine gravel coarse sand Middle sand fine sand fine grain Particle size (mm) 2～2.36 1～2 0.5～1 0.25～0.5 0.075～0.25 ＜0.075 percentage(%) 1.9 5 22.96 14.6 44.9 10.64

[0031] (2) Adding water to the acclimatized, cultured and preserved Bacillus pasturii to make the activity greater than 1mM·min -1 Bacteria solution, and adjust the pH to 7-8, then m...

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Abstract

The invention discloses a preparation method and device of microorganism coral sand brick. The preparation method includes filling a brick mould with weighed coral sand particles; adding water into Pasteur's bacillus preserved by domesticated cultivation to prepare a bacterial liquid having the activity of more than 1 mM / min, adjusting the pH to 7-8, mixing the bacterial liquid, calcium chloride having concentration of 1 mol / L and urea solution having concentration of 1 mol / L; adding the mixed liquor into the mould, performing the reaction for 3 hours in each opposite direction of current under the voltage of 3-4 V, discharging the reacted mixing solution, repeating the step for 6-8 times, and performing demoulding and drying to obtain the coral sand brick. The method is simple, has short period, and can obtain the coral sand brick with the strength meeting the relevant building standard requirement in about 2 days. The invention also discloses a preparation device for microorganism coral sand brick, and the device has a reasonable structure and can be used for industrial large scale repetition production.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a method for preparing microbial coral sand and a device for preparing coral sand. Background technique [0002] In recent years, my country's vast ocean territory has attracted widespread attention, and various construction projects on islands and reefs are in full swing. Considering that the cost of transporting construction materials from land is very high, it becomes a feasible idea to adopt an appropriate curing method for coral sand to make it a building material that can meet the needs of engineering construction. The characteristics of biological solidification technology can perfectly match the needs of coral sand solidification treatment. It will greatly improve the construction efficiency of South China Sea island and reef projects and reduce construction costs when applied to actual engineering construction. It will vigorously promote the development of marine res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/00
Inventor 方祥位李捷申春妮欧益希张楠
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA