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Preparation method of hollow large particle material with double shell layers

A large-particle, double-shell technology, applied in the fields of building thermal insulation materials and environmental treatment, can solve the problems of poor toughness, low specific strength, and easy damage to the core of ceramsite, achieve good thermal insulation performance, improve thermal insulation performance, and facilitate early transportation. Effect

Active Publication Date: 2019-09-06
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently there is a patented product CN 103496866 B, which discloses a core-shell type non-fired lightweight aggregate as a kind of non-fired ceramsite, which has been used in building insulation and environmental treatment, but this core-shell type non-fired light aggregate The toughness is poor, and it is easy to break and leak the EPS core when using a forklift in bulk; if it is used as a filter material, due to the existence of its core, the total porosity of the particles is low, and its filtration capacity is not enough
The patented product CN 102936127 A discloses a sintered lightweight hollow ceramsite, which uses sintering to remove the EPS core in the ceramsite to achieve hollowness, but this method of preparing ceramsite consumes a lot of energy, and the ceramsite has relatively low toughness Difference
Huang Lihua of Liaoning Vocational College of Architecture researched and prepared a multi-shell unfired ceramsite, but this kind of unfired ceramsite has a high density, low specific strength, and low porosity and water absorption. If it is used as a biological filter material, its Insufficient filtering capacity

Method used

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  • Preparation method of hollow large particle material with double shell layers
  • Preparation method of hollow large particle material with double shell layers
  • Preparation method of hollow large particle material with double shell layers

Examples

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Embodiment 1

[0031] A kind of preparation method of double-shell hollow large granular material, its preparation process is as follows figure 1 As shown, the selected materials and steps are as follows:

[0032] (1) A water-absorbing resin with a diameter of 6 mm after water absorption is used as the inner core, and the water-retaining degree of the water-absorbing resin is controlled at 75% in advance.

[0033] (2) Prepare the inner shell strengthening solution, adopt 30% sodium silicate solution, add 2% silica powder and 0.5% polypropylene fiber (length 2-3 mm).

[0034] (3) Put the water-absorbing resin saturated with water into the inner shell strengthening solution, and stir slowly for 1 min.

[0035] (4) Portland cement with a composition of 40% plus 20% mineral powder plus 40% fly ash is used as the cementing material (group 1-1); or phosphate cement with a composition of 75% plus 25% powder Fly ash is used as cementing material (group 1-2).

[0036] (5) Put the pretreated water-...

Embodiment 2

[0042] A kind of preparation method of double-shell hollow large granular material, its preparation process is as follows figure 1 As shown, the selected materials and steps are as follows:

[0043] (1) A water-absorbing resin with a diameter of 6 mm after water absorption is used as the inner core, and the water-retaining degree of the water-absorbing resin is controlled at 75% in advance.

[0044] (2) Prepare the inner shell layer strengthening solution, adopt 10% sodium silicate solution, add 5% industrial grade starch and 2% polypropylene fiber (length 2-3mm).

[0045] (3) Put the water-absorbing resin saturated with water into the inner shell strengthening solution, and stir slowly for 1 min.

[0046] (4) Use 90% phosphate cement plus 10% fly ash silicon-based material as the cementing material (Group 2-1); or 50% Portland cement plus 50% fly ash silicon The base material is used as cementing material (group 2-2).

[0047] (5) Put the pretreated water-absorbing resin a...

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Abstract

The invention discloses a preparation method of a hollow large particle material with double shell layers. Water-swellable resin is used as a core, the resin core pre-adsorbs most of water, an inner shell layer strengthening solution with a small quantity of short fibers is prepared for absorption by the nearly saturated resin core, and a fiber web is formed on the surface of the resin core to form an inner shell layer; using a ball forming process and wrapping the surface in a cementitious material capable of forming strength; after the material is hardened to form strength, particles pass through a solution containing a permeable material with viscosity again to form a hard shell layer on the outer surfaces of the particles; and using a drying method for maintenance to fully release water of the water-absorbent resin to form heat curing and a hollow structure. The prepared particle material with double shell layers has the characteristics of good drop resistance, high specific strength, good thermal insulation performance, high fire resistance, good crack resistance and the like.

Description

technical field [0001] The invention belongs to the field of environmental treatment and building heat preservation materials, and can also be used for agricultural earth-building materials, and in particular relates to a preparation method of a double-shell hollow large particle material. Background technique [0002] In recent years, with the increasing pollution of global water resources, biological filters have been widely used in sewage treatment processes. As a filter material, ceramsite is a porous substance with a rough surface. It has good microbial adhesion and certain adsorption capacity. It is widely used as a biological filter material and matrix in water treatment. [0003] At present, there is a patented product CN 103496866 B, which discloses a core-shell type unfired lightweight aggregate as a kind of unfired ceramsite, which has been used in building insulation and environmental treatment, but this core-shell type unfired light aggregate The toughness is p...

Claims

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Application Information

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IPC IPC(8): C04B20/12B01D39/02C02F3/00C09K21/14C04B16/04
CPCB01D39/02C02F3/00C02F2003/001C04B20/12C09K21/14C04B20/1085C04B20/1066C04B20/1033C04B20/1014C04B16/04C04B20/1048C04B20/123C04B20/1077C04B20/1055
Inventor 庞超明孟鑫鑫徐剑郦培娟
Owner SOUTHEAST UNIV