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Method for modifying organic polymer particles

A technology of polymer particles and polystyrene particles, used in the field of building materials, can solve the problems of poor bonding, wetting, and low cohesion.

Inactive Publication Date: 2014-04-30
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polystyrene is a hydrophobic non-polar polymer, and inorganic cementitious materials such as cement cannot wet it, resulting in poor bonding between the surface of polystyrene and cementitious materials, and low cohesive force, thus forming Weak side, leading to structural failure, which limits the use of polystyrene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Material preparation: Weigh 135 g of cement, 2.25 g of water reducer, 157.5 g of fly ash, 157.5 g of mineral powder, 13.5 g of activator, 1350 g of sand, 180 ml of water, 2.52 g of polystyrene particles, and 0.15 g of triethanolamine. First, add the weighed modifier triethanolamine into an appropriate amount of water, spray evenly on the surface of polystyrene particles with a watering can, modify the polystyrene particles, and mix cement and mineral powder according to the designed mixing ratio. , fly ash, activator, water reducer, water, sand and modified polystyrene particles are put into the mixer and mixed with water to form a block body, and the formed block body is left to stand and maintained , to produce block finished concrete blocks. The 7d flexural strength and compressive strength of the concrete block were 3.44MPa and 8.4MPa, and the 28d flexural strength and compressive strength were 3.56MPa and 9.8MPa, respectively.

Embodiment 2

[0015] Material preparation: Weigh 135 g of cement, 2.25 g of water reducer, 157.5 g of fly ash, 157.5 g of mineral powder, 13.5 g of activator, 1350 g of sand, 180 ml of water, 2.52 g of polystyrene particles, and 0.15 g of triethanolamine. First, add the weighed modifier triethanolamine into an appropriate amount of water, and spray evenly on the surface of polystyrene particles with a watering can to modify the polystyrene particles. When the surface of the polystyrene particles is completely wet, then Take it as the core, add weighed inorganic cementitious materials (cement, mineral powder, fly ash) while stirring, make the surface covered with a layer of inorganic cementitious materials, and make polystyrene particle composite masterbatch. Finally, the masterbatch is mixed with the remaining cement, mineral powder, fly ash, activator, water reducing agent, and water for secondary mixing to form a block body, and the formed block body is left to stand and maintained. , to ...

Embodiment 3

[0017] Material preparation: Weigh 135 g of cement, 2.25 g of water reducer, 157.5 g of fly ash, 157.5 g of mineral powder, 13.5 g of activator, 1350 g of sand, 180 ml of water, 2.52 g of polystyrene particles, and 0.15 g of triethanolamine. First, add the weighed modifier triethanolamine into an appropriate amount of water, and spray evenly on the surface of polystyrene particles with a watering can to modify the polystyrene particles. When the surface of the polystyrene particles is completely wet, then Take it as the core, add weighed inorganic cementitious materials (cement, mineral powder, fly ash) while stirring, make the surface covered with a layer of inorganic cementitious materials, and make polystyrene particle composite masterbatch. After the composite masterbatch is made, it is naturally cured for one day, and then the masterbatch is mixed with the remaining cement, mineral powder, fly ash, activator, water reducing agent, water and other materials to complete the ...

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Abstract

The invention discloses a method for modifying organic polymer particles. The method comprises the following steps: performing modification treatment on the surfaces of the organic polymer particles by using a modifying agent in concrete doped with the organic polymer particles, wherein the modifying agent is triethanolamine; the doping amount of the modifying agent triethanolamine accounts for 6% of the weight of the organic polymer particles. By adopting the method, the surface of polystyrene is modified by adding the modifying agent into concrete taking polystyrene particles as aggregate, the binding force of the polystyrene particles and a gel material is improved, the internal density of the concrete is ensured, internal crack is prevented or aggregate seam is reduced, and then the strength of a concrete building block is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for modifying organic polymer particles. Background technique [0002] Polystyrene is mainly used as insulation material in construction. Polystyrene has light density and good thermal insulation effect. The preparation of lightweight concrete blocks with polystyrene particles can not only effectively recycle polystyrene and turn waste into treasure, but also reduce the self-weight of the wall and improve the thermal insulation performance of the wall. It is an economical and reasonable way to facilitate construction. [0003] Polystyrene has the advantages of low thermal conductivity, light weight, and good stability, and has been widely used for wall and roof insulation. Due to the light weight of polystyrene, using it as a lightweight aggregate will greatly reduce the self-weight of the structure. The reduction of the self-weight of the structure can redu...

Claims

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Application Information

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IPC IPC(8): C04B16/08
Inventor 吴辉琴彭杰
Owner GUANGXI UNIVERSITY OF TECHNOLOGY