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Dry-mixed composite light aggregate concrete based on inorganically modified polyurethane particles

A technology of lightweight aggregate concrete and polyurethane particles, applied in the field of thermal insulation lightweight aggregate concrete, can solve problems such as potential safety hazards, achieve the effect of ensuring strength, standardizing concrete density grade, and improving bonding strength

Inactive Publication Date: 2018-11-06
河南格林循环电子废弃物处置有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention makes improvements to the above-mentioned existing problems, and through inorganic modification of waste polyurethane particles, it has a fireproof function, which solves the hidden safety problems of light aggregates in the transportation and construction process, can meet the requirements of safe building materials, and has relatively high High safety, effectively eliminating potential safety hazards in the construction process. In order to further improve the standardization of dry-mixed composite light aggregates, while inorganically modifying waste polyurethane, the particle size of the modified polyurethane is also standardized and graded. It can effectively guarantee the bulk density of polyurethane materials and ensure that the modified polyurethane particles can be more standardizedly applied in dry-mixed composite light aggregate concrete

Method used

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  • Dry-mixed composite light aggregate concrete based on inorganically modified polyurethane particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of dry-mixed composite lightweight aggregate concrete with a density grade of 600 based on inorganic modified polyurethane particles

[0040] Step 1: Carry out particle size classification on waste polyurethane particles to obtain waste polyurethane particles with two particle sizes of 3-5 mm and 6-20 mm.

[0041] Step 2: Inorganic modification treatment is carried out on the waste polyurethane particles with two particle sizes described in step 1 to obtain inorganic modified polyurethane particles.

[0042] The inorganic modification treatment is: use 1.5 parts by weight of silicone water repellent to atomize and waterproof 25 parts by weight of waste polyurethane particles to obtain waterproof polyurethane particles with wet surface, and then add 3.5 parts by weight of magnesium hydroxide and 8 parts by weight of cement The waterproof polyurethane particles are surface wrapped to obtain modified polyurethane particles with a dense protective laye...

Embodiment 2

[0046] Example 2 Preparation of dry-mixed composite lightweight aggregate concrete with a density grade of 800 based on inorganic modified polyurethane particles

[0047] Step 1: Carry out particle size classification on waste polyurethane particles to obtain waste polyurethane particles with two particle sizes of 3-5 mm and 6-20 mm.

[0048] Step 2: Inorganic modification treatment is carried out on the waste polyurethane particles with two particle sizes described in step 1 to obtain modified polyurethane particles with a dense protective layer of inorganic materials on the surface.

[0049] The inorganic modification treatment is as follows: 55 parts by weight of waste polyurethane particles are atomized and waterproofed with 7 parts by weight of organosilicon waterproofing agent to obtain waterproof polyurethane particles with wet surface, and then 11 parts by weight of ammonium polyphosphate and 62 parts by weight of cement are added The waterproof polyurethane particles ...

Embodiment 3

[0053] Example 3 Preparation of dry-mixed composite lightweight aggregate concrete with a density grade of 1000 based on inorganic modified polyurethane particles

[0054] Step 1: Carry out particle size classification on waste polyurethane particles to obtain waste polyurethane particles with two particle sizes of 3-5mm and 6-21mm.

[0055] Step 2: Inorganic modification treatment is carried out on the waste polyurethane particles with two particle sizes described in step 1 to obtain inorganic modified polyurethane particles.

[0056] The inorganic modification treatment is as follows: 4 parts by weight of silicone water repellent is used to atomize and waterproof 40 parts by weight of waste polyurethane particles to obtain waterproof polyurethane particles with wet surface, and then add 7 parts by weight of ammonium polyphosphate and 35 parts by weight of cement The waterproof polyurethane particles are surface wrapped to obtain modified polyurethane particles with a dense p...

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Abstract

The invention relates to dry-mixed composite light aggregate concrete based on inorganically modified polyurethane particles and a preparation method of the dry-mixed composite light aggregate concrete. The concrete is prepared from raw materials in parts by weight as follows: 38-135 parts of the inorganically modified polyurethane particles, 162-485 parts of cement, 30-127 parts of fly ash, 23-50parts of mineral powder, 3-50 parts of silica fume, 37-740 parts of dry sand, 4.6-19.7 parts of an admixture and 105-380 parts of water. The preparation method comprises the following steps: 1, wastepolyurethane particles are subjected to grain size grading; 2, the graded waste polyurethane particles are inorganically modified; 3, the cement, the fly ash, the silica fume, the mineral powder andthe admixture are added to a dry powder stirrer for uniform stirring and mixing, and dry-mixed composite powder is obtained; 4, the dry-mixed composite powder is mixed with the inorganically modifiedpolyurethane particles, water is added for stirring, and the dry-mixed composite light aggregate concrete is prepared.

Description

technical field [0001] The invention relates to thermal insulation lightweight aggregate concrete for building materials, in particular to a dry-mixed composite lightweight aggregate concrete based on inorganic modified polyurethane particles. Background technique [0002] Light aggregate concrete refers to concrete with a dry apparent density of less than 1950kg / m³ prepared with light aggregate, light sand or ordinary sand, cement and water. Lightweight aggregate concrete has low apparent density, high specific strength, and good thermal insulation, heat insulation, fire resistance, and shock resistance. It is a new type of concrete that is second only to ordinary concrete in dosage. The application of high-performance lightweight aggregate concrete in construction can reduce the self-weight of the superstructure and reduce the cost of foundation treatment. Or on the premise of not increasing the cost of basic treatment, the economic benefits are very considerable by incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/28C04B111/40
CPCC04B28/02C04B2111/28C04B2111/40C04B2201/20C04B2201/50C04B18/08C04B18/146C04B14/06C04B18/141C04B16/082C04B24/282C04B22/066C04B24/383C04B16/0625C04B2103/0057C04B2103/302C04B24/42C04B2103/12C04B22/16
Inventor 黄旭江秦远张攀辉刘运浩
Owner 河南格林循环电子废弃物处置有限公司
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