阅读说明：本技术 一种复合型隔离防护砂及制备方法 (Composite isolation protective sand and preparation method thereof ) 是由 王春义 于 2021-02-05 设计创作，主要内容包括：本发明公开了一种复合型隔离防护砂,其为多层包覆结构,由内而外依次为骨料、过渡层、功能壳层以及表面防护层。本发明在矿物颗粒外表面设置过渡层、功能壳层以及表面防护层,可以有效解决天然矿物颗粒与粘结层及后浇混凝土的粘结性差,对粘结层的隔离防护效果差及硬度大、棱角分明易轧伤主体增强层等问题,而且相对于人工合成砂,本发明的复合型隔离防护砂生产效率高、生产能耗相对较低,同时还赋予其较优的耐水性、耐候性、耐老化以及抗紫外线性能,还避免了运输及使用过程中二次粉尘的产生。(The invention discloses composite type isolation protective sand which is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside. The composite type isolation protective sand has the advantages that the transition layer, the functional shell layer and the surface protective layer are arranged on the outer surface of the mineral particles, so that the problems that natural mineral particles are poor in cohesiveness with the bonding layer and post-cast concrete, the isolation protective effect on the bonding layer is poor, the hardness is high, edges and corners are clear, the main body reinforcing layer is easy to roll and damage and the like can be effectively solved, compared with synthetic sand, the composite type isolation protective sand is high in production efficiency and low in production energy consumption, meanwhile, the composite type isolation protective sand is endowed with excellent water resistance, weather resistance, ageing resistance and ultraviolet resistance, and the generation of secondary dust in the transportation and use processes is avoided.)

1. The utility model provides a compound isolation protection sand which characterized in that: the composite material is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside.

2. The composite type isolation protective sand of claim 1, which is characterized in that: the aggregate is a mineral particle carrier and is composed of one or more of marble, quartz stone, vermiculite and white marble, and the size of the aggregate is 28-80 meshes.

3. The composite type isolation protective sand of claim 1, which is characterized in that: the transition layer is a mixture of a 3-aminopropyl triethoxysilane coupling agent and a titanate coupling agent in a mass ratio of 1:1, and the thickness of the transition layer is 10-15 um.

4. The composite type isolation protective sand of claim 1, which is characterized in that: the functional shell layer comprises the following components in parts by weight: 1-3 parts of nano zinc oxide, 1-3 parts of whisker silicon, 10-20 parts of acrylate emulsion, 0.05-1 part of benzotriazole ultraviolet absorbent, 5-10 parts of borax, 0.1-0.5 part of polycarboxylic acid water reducer, 10-15 parts of titanium dioxide and 20-25 parts of portland cement, wherein the thickness of the functional shell layer is 30-50 mu m.

5. The composite type isolation protective sand of claim 1, which is characterized in that: the surface protective layer comprises the following components in parts by weight: 100 parts of styrene-acrylate copolymer emulsion, 0-5 parts of 3-aminopropyltriethoxysilane coupling agent and 50-250 parts of purified water, wherein the thickness is 20-35 mu m.

6. The composite type isolation protective sand of claim 1, which is characterized in that: the preparation method of the composite type isolation protection sand comprises the following steps:

1) preparing a functional shell material: adding the acrylic emulsion with the formula amount into a roller stirrer, adding the titanium dioxide, the silicon whisker, the benzotriazole ultraviolet absorbent, the nano zinc oxide, the Portland cement, the water reducing agent and the borax with the formula amount under stirring, and then stirring and mixing for 10-15 minutes at high speed to prepare functional shell layer slurry for later use;

2) preparing a surface protective layer material: adding the styrene-acrylate copolymer emulsion into a roller stirrer, adding the 3-aminopropyltriethoxysilane coupling agent and purified water in a formula amount under stirring, and stirring and mixing for 5-20 minutes to prepare surface protective layer slurry for later use;

3) coating aggregate: adding a mineral particle carrier with 28-80 meshes of continuous gradation into a roller stirrer, spraying a transition layer reagent diluted by 10-100 times with water in a proper amount under a stirring state, and stirring for 5-20 minutes until the mixture is uniformly coated;

4) adding functional shell layer slurry accounting for 0.1-20% of the mass of the mineral particle carrier into the material prepared in the step 3) under a stirring state, stirring for 10-30 minutes until the materials are uniformly mixed and coated, completing pre-shaping at 200-400 ℃, drying at 600-800 ℃, cooling to below 200 ℃ by air cooling, spraying a proper amount of surface protective layer slurry, uniformly coating, drying, cooling, screening and dedusting to obtain the composite type isolation protective sand.

Technical Field

The invention relates to the field of building materials, in particular to composite type isolation protective sand and a preparation method thereof.

Background

At present, the basic structure of the pre-paved waterproof roll material in the market at home and abroad comprises: the surface isolation and protection layer generally comprises a micron-sized protection film or millimeter-sized particles, the particle protection layer comprises natural mineral particles, synthetic sand and the like, common natural mineral particles comprise quartz sand and the like, and common synthetic sand comprises mullite sand, ceramic sand, corundum and the like. The main technical defects of natural mineral particles such as quartz sand include: poor adhesion with bonding layers and post-cast concrete, poor isolation and protection effects on the bonding layers, high hardness, clear edges and corners, easy damage to main reinforcing layers and the like. The main technical defects of artificial synthetic sand such as mullite sand and the like comprise: high production and manufacturing cost, low production efficiency, high production energy consumption, more solid waste of byproducts, high disposal difficulty and the like.

Disclosure of Invention

The invention aims to overcome the defects of the technology and provide the composite type isolation protective sand and the preparation method thereof, which improve the caking property and effectively reduce the production cost.

In order to achieve the purpose, the invention adopts the technical scheme that: the composite isolating protective sand is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside.

The aggregate is a mineral particle carrier and is composed of one or more of marble, quartz stone, vermiculite and white marble, and the size of the aggregate is 28-80 meshes.

The transition layer is a mixture of a 3-aminopropyl triethoxysilane coupling agent and a titanate coupling agent in a mass ratio of 1:1, and the thickness of the transition layer is 10-15 um.

The functional shell layer comprises the following components in parts by weight: 1-3 parts of nano zinc oxide, 1-3 parts of whisker silicon, 10-20 parts of acrylate emulsion, 0.05-1 part of benzotriazole ultraviolet absorbent, 5-10 parts of borax, 0.1-0.5 part of polycarboxylic acid water reducer, 10-15 parts of titanium dioxide and 20-25 parts of portland cement, wherein the thickness of the functional shell layer is 30-50 mu m.

The surface protective layer comprises the following components in parts by weight: 100 parts of styrene-acrylate copolymer emulsion, 0-5 parts of 3-aminopropyltriethoxysilane coupling agent and 50-250 parts of purified water, wherein the thickness is 20-35 mu m.

The preparation method of the composite type isolation protection sand comprises the following steps:

1) preparing a functional shell material: adding the acrylic emulsion with the formula amount into a roller stirrer, adding the titanium dioxide, the silicon whisker, the benzotriazole ultraviolet absorbent, the nano zinc oxide, the Portland cement, the water reducing agent and the borax with the formula amount under stirring, and then stirring and mixing for 10-15 minutes at high speed to prepare functional shell layer slurry for later use;

2) preparing a surface protective layer material: adding the styrene-acrylate copolymer emulsion into a roller stirrer, adding the 3-aminopropyltriethoxysilane coupling agent and purified water in a formula amount under stirring, and stirring and mixing for 5-20 minutes to prepare surface protective layer slurry for later use;

3) coating aggregate: adding a mineral particle carrier with 28-80 meshes of continuous gradation into a roller stirrer, spraying a transition layer reagent diluted by 10-100 times with water in a proper amount under a stirring state, and stirring for 5-20 minutes until the mixture is uniformly coated;

4) adding functional shell layer slurry accounting for 0.1-20% of the mass of the mineral particle carrier into the material prepared in the step 3) under a stirring state, stirring for 10-30 minutes until the materials are uniformly mixed and coated, completing pre-shaping at 200-400 ℃, drying at 600-800 ℃, cooling to below 200 ℃ by air cooling, spraying a proper amount of surface protective layer slurry, uniformly coating, drying, cooling, screening and dedusting to obtain the composite type isolation protective sand.

The invention has the beneficial effects that: the composite type isolation protective sand has the advantages that the transition layer, the functional shell layer and the surface protective layer are arranged on the outer surface of the mineral particles, so that the problems that natural mineral particles are poor in cohesiveness with the bonding layer and post-cast concrete, the isolation protective effect on the bonding layer is poor, the hardness is high, edges and corners are clear, the main body reinforcing layer is easy to roll and damage and the like can be effectively solved, compared with synthetic sand, the composite type isolation protective sand is high in production efficiency and low in production energy consumption, meanwhile, the composite type isolation protective sand is endowed with excellent water resistance, weather resistance, ageing resistance and ultraviolet resistance, and the generation of secondary dust in the transportation and use processes is avoided.

Detailed Description

The following specific examples further illustrate the invention.

All other embodiments are within the scope of the invention.

The materials used in the following examples are commercially available unless otherwise specified.

Wherein, the zinc oxide adopts ceramic coating grade nano zinc oxide, and the main technical indexes are as follows: the zinc oxide (ZnO) is more than or equal to 95.0 percent, the average grain diameter is less than or equal to 100nm, the specific surface area is more than or equal to 65m2/g, and the water-soluble substance is less than or equal to 0.5 percent.

The crystal whisker silicon adopts ceramic coating level active crystal whisker silicon, and has the main technical indexes that: the grain diameter is 1-5 um, the bulk density is 0.65g/cm3, the Mohs hardness is 7, and the loss on ignition is less than or equal to 0.10%.

The benzotriazole ultraviolet absorbent has the main technical indexes that: the effective content is more than or equal to 99 percent, the drying weight loss is less than or equal to 0.5 percent, and the melting point is 80-150 ℃.

The titanium dioxide is rutile titanium dioxide.

The Portland cement adopts early-strength white Portland cement, and has the main technical indexes that: the fineness (specific surface area) is 400-500 m 2/kg.

Example 1

The composite isolating protective sand is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside.

The aggregate is a mineral particle carrier and is composed of one or more of marble, quartz, vermiculite and white marble, and the size of the aggregate is 28 meshes.

The transition layer is a mixture of a 3-aminopropyl triethoxysilane coupling agent and a titanate coupling agent in a mass ratio of 1:1, and the thickness of the transition layer is 10 microns.

The functional shell layer comprises the following components in parts by weight: 1 part of nano zinc oxide, 1 part of crystal whisker silicon, 10 parts of acrylate emulsion, 0.05 part of benzotriazole ultraviolet absorbent, 5 parts of borax, 0.1 part of polycarboxylic acid water reducing agent, 10 parts of titanium dioxide and 20 parts of portland cement, and the thickness of the functional shell layer is 30 microns.

The surface protective layer comprises the following components in parts by weight: 100 parts of styrene-acrylate copolymer emulsion, 2 parts of 3-aminopropyltriethoxysilane coupling agent and 50 parts of purified water, wherein the thickness is 20 mu m.

The preparation method of the composite type isolation protection sand comprises the following steps:

1) preparing a functional shell material: adding the acrylic emulsion with the formula amount into a roller stirrer, adding the titanium dioxide, the silicon whisker, the benzotriazole ultraviolet absorbent, the nano zinc oxide, the Portland cement, the water reducing agent and the borax with the formula amount under stirring, and then stirring and mixing for 10-15 minutes at high speed to prepare functional shell layer slurry for later use;

2) preparing a surface protective layer material: adding the styrene-acrylate copolymer emulsion into a roller stirrer, adding the 3-aminopropyltriethoxysilane coupling agent and purified water in a formula amount under stirring, and stirring and mixing for 10 minutes to prepare surface protective layer slurry for later use;

3) coating aggregate: adding a mineral particle carrier with 28-mesh continuous gradation into a roller stirrer, spraying a proper amount of transition layer reagent diluted by 10 times with water while stirring, and stirring for 5 minutes until the mixture is uniformly coated;

4) adding functional shell layer slurry accounting for 5% of the mass of the mineral particle carrier into the material prepared in the step 3) under the stirring state, stirring for 10 minutes until the materials are uniformly mixed and coated, completing pre-shaping at 200 ℃, drying at 600 ℃, cooling to below 200 ℃ through air cooling, spraying a proper amount of surface protective layer slurry, uniformly coating, drying, cooling, screening and dedusting to obtain the composite type isolation protective sand.

Example 2

The composite isolating protective sand is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside.

The aggregate is a mineral particle carrier and is composed of one or more of marble, quartz, vermiculite and white marble, and the size of the aggregate is 80 meshes.

The transition layer is a mixture of a 3-aminopropyl triethoxysilane coupling agent and a titanate coupling agent in a mass ratio of 1:1, and the thickness of the transition layer is 15 microns.

The functional shell layer comprises the following components in parts by weight: 3 parts of nano zinc oxide, 3 parts of crystal whisker silicon, 20 parts of acrylate emulsion, 1 part of benzotriazole ultraviolet absorbent, 10 parts of borax, 0.5 part of polycarboxylic acid water reducing agent, 15 parts of titanium dioxide and 25 parts of portland cement, wherein the thickness of the functional shell layer is 50 microns.

The surface protective layer comprises the following components in parts by weight: 100 parts of styrene-acrylate copolymer emulsion, 5 parts of 3-aminopropyltriethoxysilane coupling agent and 250 parts of purified water, wherein the thickness is 35 mu m.

The preparation method of the composite type isolation protection sand comprises the following steps:

1) preparing a functional shell material: adding the acrylic emulsion with the formula amount into a roller stirrer, adding the titanium dioxide, the silicon whisker, the benzotriazole ultraviolet absorbent, the nano zinc oxide, the Portland cement, the water reducer and the borax with the formula amount under the stirring state, and then stirring and mixing for 15 minutes at a high speed to prepare functional shell layer slurry for later use;

2) preparing a surface protective layer material: adding the styrene-acrylate copolymer emulsion into a roller stirrer, adding the 3-aminopropyltriethoxysilane coupling agent and purified water in a formula amount under stirring, and stirring and mixing for 20 minutes to prepare surface protective layer slurry for later use;

3) coating aggregate: adding the mineral particle carrier with 80-mesh continuous gradation into a roller stirrer, spraying a proper amount of transition layer reagent diluted by 100 times with water under the stirring state, and stirring for 20 minutes until the mixture is uniformly coated;

4) adding functional shell layer slurry accounting for 20% of the mass of the mineral particle carrier into the material prepared in the step 3) under the stirring state, stirring for 30 minutes until the materials are uniformly mixed and coated, completing pre-shaping at 400 ℃, drying at 800 ℃, cooling to below 200 ℃ through air cooling, spraying a proper amount of surface protective layer slurry, uniformly coating, drying, cooling, screening and dedusting to obtain the composite type isolation protective sand.

Example 3

The composite isolating protective sand is of a multilayer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside.

The aggregate is a mineral particle carrier and is composed of one or more of marble, quartz, vermiculite and white marble, and the size of the aggregate is 45 meshes.

The transition layer is a mixture of a 3-aminopropyl triethoxysilane coupling agent and a titanate coupling agent in a mass ratio of 1:1, and the thickness of the transition layer is 13 um.

The functional shell layer comprises the following components in parts by weight: 2 parts of nano zinc oxide, 2 parts of crystal whisker silicon, 15 parts of acrylate emulsion, 0.08 part of benzotriazole ultraviolet absorbent, 7 parts of borax, 0.3 part of polycarboxylic acid water reducing agent, 12 parts of titanium dioxide and 22 parts of portland cement, wherein the thickness of the functional shell layer is 40 microns.

The surface protective layer comprises the following components in parts by weight: 100 parts of styrene-acrylate copolymer emulsion, 3 parts of 3-aminopropyltriethoxysilane coupling agent and 150 parts of purified water, wherein the thickness is 30 mu m.

The preparation method of the composite type isolation protection sand comprises the following steps:

1) preparing a functional shell material: adding the acrylic emulsion with the formula amount into a roller stirrer, adding the titanium dioxide, the silicon whisker, the benzotriazole ultraviolet absorbent, the nano zinc oxide, the Portland cement, the water reducing agent and the borax with the formula amount under the stirring state, and then stirring and mixing for 13 minutes at a high speed to prepare functional shell layer slurry for later use;

2) preparing a surface protective layer material: adding the styrene-acrylate copolymer emulsion into a roller stirrer, adding the 3-aminopropyltriethoxysilane coupling agent and purified water in a formula amount under stirring, and stirring and mixing for 15 minutes to prepare surface protective layer slurry for later use;

3) coating aggregate: adding a 45-mesh continuous graded mineral particle carrier into a roller stirrer, spraying a proper amount of transition layer reagent diluted by 50 times with water under the stirring state, and stirring for 15 minutes until the mixture is uniformly coated;

4) adding functional shell layer slurry accounting for 10% of the mass of the mineral particle carrier into the material prepared in the step 3) under the stirring state, stirring for 20 minutes until the materials are uniformly mixed and coated, completing pre-shaping at 300 ℃, drying at 700 ℃, cooling to below 200 ℃ through air cooling, spraying a proper amount of surface protective layer slurry, uniformly coating, drying, cooling, screening and dedusting to obtain the composite type isolation protective sand.