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A method of wet firing sea sand into high-strength building materials

A technology for building materials and sea sand, which is applied in the field of preparing building materials by utilizing natural resources, can solve problems such as corrosion of steel bars and hidden dangers of engineering safety, and achieve the effect of avoiding corrosion and reducing environmental load.

Active Publication Date: 2016-08-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of building materials, due to its relatively high salt content, the chloride ions in the salt will corrode the steel bars and bring safety hazards to the project, thus limiting the application of sea sand

Method used

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  • A method of wet firing sea sand into high-strength building materials
  • A method of wet firing sea sand into high-strength building materials
  • A method of wet firing sea sand into high-strength building materials

Examples

Experimental program
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Effect test

Embodiment 1

[0028] First, if figure 1 The technological process uses sea sand as the main raw material, and wet-fires the sea sand into building material samples.

[0029] First grind the sea sand, pass through a 100-mesh sieve, and measure the ground sea sand: commercially available analytically pure slaked lime powder = 75%: 25% by mass, stir evenly to obtain a mixture, and then add seawater, the amount of seawater added It is 15% mass percent of the total weight of sea sand and slaked lime powder. After fully stirring evenly, press it into a micro-brick green body under a tablet press (model FY-15), and put the pressed micro-brick green body as a building material sample. Put it into a hydrothermal reactor, and cure it under the saturated vapor pressure of water at 200°C for 10 hours, and finally, obtain a high-strength building material sample.

[0030] The pressed micro-brick green body and the high-strength building material sample (micro-brick) obtained by wet firing were analyzed...

Embodiment 2

[0040] First of all, choose the sand and gravel directly mined by the sea that have been eroded by seawater without desalination as raw materials, measure sea sand: slaked lime powder = 70%: 30% by mass, stir evenly and add seawater, the amount of seawater added is 10% by mass of the total weight of sea sand and slaked lime, after fully stirring evenly, press and form in the mold of ordinary pavement bricks to obtain the green body of ordinary pavement bricks; finally, put the pressed green body of ordinary pavement bricks into the hydrothermal reactor Curing treatment at 160°C under the saturated vapor pressure of water for 10 hours to obtain ordinary pavement bricks. After testing, its flexural strength can reach 20MPa.

Embodiment 3

[0042] First, choose sea sand as raw material, measure sea sand: slaked lime powder = 80%: 20% by mass, then add sea sand and sea water with 15% of the total weight of slaked lime, stir well and put it into a cement reef mold to press it into Cement reef green body; finally, put the pressed green body into a hydrothermal reactor, and solidify under the saturated vapor pressure of water at 240°C for 10 hours to obtain an artificial fish reef (cement reef). After testing, its flexural strength can reach 20MPa.

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Abstract

The invention relates to a method for wet-type burning sea sand to produce a high strength building material. The method comprises the following steps: weighing sea sand and slaked lime at a weight ratio of 60-90%: 10-40%, stirring and mixing uniformly, adding sea water, mixing, and performing compression moulding to obtain the building material proximate matter green body; demoulding the green body and performing wet type burning to obtain the building material proximate matter product. Through detection, the breaking strength is 20-24MPa, the adding amount of sea water is 5-20% of sea sand and slaked lime; sea sand is a dinas which is directly exploited on the sea land and corroded by the sea water without being desalted; the wet-type burning process comprises the steps of putting the green body in a hydrothermal reactor, and performing hydrothermal solidification for 9-24h at the temperature of 120-240 DEG C. The local material sea sand in the coastal city and the island with rich reserves and low utilization rate is solidified to form a wall brick, a floor tile, a square brick, an artificial fish reef and an ocean river reinforcing dam; the island building cost and time are greatly saved and the method is particularly suitable for the development and construction of a remote island (such as Nansha islands).

Description

technical field [0001] The invention relates to a method for wet-burning sea sand into high-strength building materials, and belongs to the technical field of using natural resources to prepare building materials. Background technique [0002] In order to protect the rights and interests of the sea, as a traditional land power, the country has intensified the development of islands, marched toward the sea, and built islands. The island construction process requires a lot of building materials. At present, the building materials for building islands mainly rely on inland transportation, which will not only consume a lot of manpower, material and financial resources, but also greatly prolong the construction time, which is very unfavorable to the construction and development of islands. As the second largest marine mineral after oil and gas, sea sand has a low utilization rate at present. If the sea sand can be turned into building materials locally, the cost and time of bui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B14/06
Inventor 景镇子成铭钊郦怡杨杰苗嘉俊
Owner TONGJI UNIV
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