阅读说明：本技术 楼板用磷ii型无水石膏基隔声材料及其制备方法 (Phosphorus II type anhydrous gypsum-based sound insulation material for floor slab and preparation method thereof ) 是由 彭家惠 朱聪 瞿金东 张建新 易伟 刘先锋 于 2021-10-15 设计创作，主要内容包括：本发明属于建筑材料技术领域,具体涉及一种楼板用磷II型无水石膏基隔声材料。所述隔声材料包括磷II型无水石膏、橡胶颗粒、水、水泥、矿渣、硫酸钾、偶联剂、玻化微珠、聚合物纤维和发泡剂。本发明的隔声材料隔声效果优异。(The invention belongs to the technical field of building materials, and particularly relates to a phosphorus II type anhydrous gypsum-based sound insulation material for a floor slab. The sound insulation material comprises phosphorus II type anhydrous gypsum, rubber particles, water, cement, slag, potassium sulfate, a coupling agent, vitrified micro bubbles, polymer fibers and a foaming agent. The sound insulation material of the invention has excellent sound insulation effect.)

1. The phosphorus II type anhydrous gypsum-based sound insulation material for the floor is characterized by comprising phosphorus II type anhydrous gypsum, rubber particles, water, cement, slag, potassium sulfate, a coupling agent, vitrified micro bubbles, polymer fibers and a foaming agent.

2. The phosphorus type II anhydrite-based sound-insulating material for floor slabs as claimed in claim 1, wherein the phosphorus type II anhydrite has a specific surface area of 400 ± 20m²/kg。

3. The phosphorus type II anhydrite-based sound-insulating material for floor slabs according to claim 1 or 2, wherein the polymer fibers include polyvinyl alcohol fibers.

4. The type-II phosphorus anhydrous gypsum-based acoustical insulation material for floor slabs according to any one of claims 1 to 3, wherein said coupling agent comprises a silane coupling agent.

5. The type II phosphorus anhydrous gypsum-based acoustical insulation material for floor slabs according to any one of claims 1 to 4, wherein said foaming agent comprises sodium fatty alcohol-polyoxyethylene ether sulfate.

6. The phosphorus type II anhydrite-based sound-insulating material for floor slabs according to any one of claims 1 to 5, further comprising a water retention agent, a water reducing agent and an adhesive.

7. The type II phosphogypsum-based acoustical insulation material for floor slabs of claim 6, wherein the water retention agent comprises hydroxypropyl methyl cellulose ether.

8. The phosphorus type II anhydrite-based sound-insulating material for floor slabs according to claim 6 or 7, wherein the water reducing agent comprises a polyether polycarboxylic acid type water reducing agent.

9. The phosphorus II type anhydrous gypsum-based sound insulation material for floor slabs according to any one of claims 6 to 8, comprising, by mass, 100 parts of phosphorus II type anhydrous gypsum, 5 to 20 parts of rubber particles, 60 to 90 parts of water, 3 to 10 parts of cement, 5 to 15 parts of slag, 0.3 to 1.2 parts of potassium sulfate, 0.2 to 1.2 parts of a coupling agent, 60 to 95 parts of vitrified micro bubbles, 0.3 to 0.9 part of polymer fibers, 0.2 to 0.5 part of a foaming agent, 0.2 to 0.9 part of a water retaining agent, 0.3 to 0.7 part of a water reducing agent, and 0.2 to 0.6 part of an adhesive.

10. The method for producing a phosphorus type II anhydrite-based sound-insulating material for floors as claimed in any one of claims 1 to 9, wherein the raw materials are mixed uniformly.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to a phosphorus II type anhydrous gypsum-based sound insulation material for a floor slab and a preparation method thereof.

Background

In order to solve the technical problem that the quality of a manufactured downstream product is poor due to unstable composition of a building gypsum phase prepared from the existing phosphogypsum, the applicant develops a phosphorus II type anhydrous gypsum which is prepared by the following process: baking the phosphogypsum at 45 ℃ until the water content is less than or equal to 5%, then calcining at 800 +/-50 ℃ for 2h, cooling by air flow outside a hearth after sintering, grinding into powder with the specific surface area of 400 +/-20 m2/kg, and aging for 3 days. The phase composition of the phosphorus II type anhydrous gypsum is stable, and the crystal form is good.

However, when the phosphorus II type anhydrite is used as a sound insulation material, the sound insulation effect is not good.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a phosphorus II type anhydrous gypsum-based sound insulating material for a floor slab having an excellent sound insulating effect.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the phosphorus II type anhydrous gypsum-based sound insulation material for the floor slab comprises phosphorus II type anhydrous gypsum, rubber particles, water, cement, slag, potassium sulfate, a coupling agent, vitrified micro bubbles, polymer fibers and a foaming agent.

Further, the specific surface area of the phosphorus II type anhydrous gypsum is 400 +/-20 m²/kg。

Further, the polymer fibers include polyvinyl alcohol fibers.

Further, the coupling agent includes a silane coupling agent.

Further, the foaming agent comprises fatty alcohol-polyoxyethylene ether sodium sulfate.

Further, the phosphorus II type anhydrous gypsum-based sound insulation material for the floor slab further comprises a water-retaining agent, a water reducing agent and an adhesive.

Further, the water-retaining agent comprises hydroxypropyl methyl cellulose ether.

Further, the water reducing agent comprises a polyether polycarboxylic acid water reducing agent.

Further, the adhesive comprises a vinyl acetate-ethylene copolymer redispersible latex powder.

Further, the phosphorus II type anhydrous gypsum-based sound insulation material for the floor slab comprises, by mass, 100 parts of phosphorus II type anhydrous gypsum, 5-20 parts of rubber particles, 60-90 parts of water, 3-10 parts of cement, 5-15 parts of slag, 0.3-1.2 parts of potassium sulfate, 0.2-1.2 parts of a coupling agent, 60-95 parts of vitrified micro bubbles, 0.3-0.9 part of polymer fibers, 0.2-0.5 part of a foaming agent, 0.2-0.9 part of a water-retaining agent, 0.3-0.7 part of a water-reducing agent and 0.2-0.6 part of an adhesive.

The invention also aims to provide a preparation method of the phosphorus II type anhydrous gypsum-based sound insulation material for protecting the floor slab, and the raw materials are uniformly mixed.

The invention has the beneficial effects that:

the phosphorus II type anhydrous gypsum-based sound insulation material for the floor slab has excellent sound insulation effect.

According to the invention, the foaming agent can further improve the sound insulation effect of the sound insulation material.

According to the invention, under the coupling action of the rubber particles and the foaming agent, the closed pore porosity of the matrix can be effectively increased, and the pore structure characteristics are improved, so that the effects of sound absorption and insulation, elastic vibration reduction and the like are achieved, and the sound insulation effect of the sound insulation material is further improved.

Detailed Description

The examples are provided for better illustration of the present invention, but the present invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.

Example 1

The phosphorus II type anhydrous gypsum is prepared by the following steps:

placing the phosphogypsum raw material at 45 ℃ to dry until the water content is less than or equal to 5%, then calcining at 800 +/-50 ℃ for 2h, cooling to room temperature through air flow outside a hearth after sintering, grinding into powder with the specific surface area of 400 +/-20 m2/kg, and aging for 3 days.

Example 2

Phosphorus II type anhydrous gypsum based sound insulation material for floor slab, its composition is: 100kg of phosphorus II type anhydrite prepared in example 1, 10kg of rubber particles (particle size of 200 to 300 μm, crushed stone), 65kg of tap water, 4kg of P.O 42.5-grade Portland cement, 10kg of S95-grade slag with a specific surface area of 400-450m2/kg, 0.6kg of potassium sulfate, KH 5500.3 kg of a silane coupling agent, 75kg of vitrified micro-beads with a volume weight of 80 to 130kg/m3 and a particle size of 150-250 μm, 0.5kg of polyvinyl alcohol fibers, 0.6kg of hydroxypropyl methyl cellulose ether, 0.5kg of polyether polycarboxylic acid water reducing agent (from Pasteur, Germany, model number MELFLUX 2651F), 0.4kg of vinyl acetate-ethylene copolymer redispersible latex powder and 0.2kg of sodium fatty alcohol polyoxyethylene ether sulfate (from Shandong, Xin chemical Co., Ltd., type number AES).

The preparation steps of the wall sound insulation material are as follows: mixing the above materials.

Example 3

Phosphorus II type anhydrous gypsum based sound insulation material for floor slab, its composition is: 100kg of phosphorus II type anhydrite prepared in example 1, 5-20kg of rubber particles (particle diameter of 200-300 μm, crushed stone shape), 85kg of tap water, 7kg of P.O 42.5 grade ordinary portland cement, and a specific surface area of 400-450 m-²13kg of S95 grade slag, 0.6kg of potassium sulfate, KH 5500.7 kg of silane coupling agent and 80-130kg/m of bulk weight³70kg of vitrified micro-beads with the grain diameter of 150-.

The preparation steps of the phosphorus II type anhydrous gypsum-based sound insulation material for the floor slab are as follows: mixing the above materials.

Example 4

Phosphorus II type anhydrous gypsum based sound insulation material for floor slab, its composition is: 100kg of phosphorus II type anhydrite prepared in example 1, 15kg of rubber particles (particle diameter of 200 to 300 μm, crushed stone shape), 80kg of tap water, 10kg of P.O 42.5 grade ordinary portland cement, 400-450m in specific surface area²15kg of S95 grade slag, 0.9kg of potassium sulfate, KH 5500.6 kg of silane coupling agent and 80-130kg/m of bulk weight³And particle size of 150-250 μm65kg of vitrified micro bubbles, 0.7kg of polyvinyl alcohol fiber, 0.5kg of hydroxypropyl methyl cellulose ether, 0.6kg of polyether polycarboxylic acid water reducing agent (from Pasteur, Germany, with the model number of MELFLUX 2651F), 0.3kg of vinyl acetate-ethylene copolymer redispersible emulsion powder and 0.2kg of fatty alcohol polyoxyethylene ether sodium sulfate (from Shandong Huixin chemical technology Co., Ltd, with the model number of AES).

The preparation steps of the wall sound insulation material are as follows: mixing the above materials.

Example 5

The present embodiment is different from embodiment 3 in that: does not contain fatty alcohol polyoxyethylene ether sodium sulfate.

Example 6

The present embodiment is different from embodiment 3 in that: no rubber particles are contained.

Performance detection

Part 6 of the Acoustic building and construction Components measurement according to GB/T19889.6-2005: the sound insulation materials prepared in examples 2 to 4 were tested for sound insulation performance in the laboratory measurement of floor impact sound insulation, and the results are shown in table 1.

TABLE 1 test results

Detecting content	Example 2	Example 3	Example 4	Example 5	Example 6
						Sound insulationquantity/dB	79	86	82	63	58

As can be seen from table 1, the sound insulation amount of example 3 was improved by 23dB and 28dB, respectively, as compared with examples 5 and 6. It is thus shown that, in the present invention, the foaming agent and the rubber particles can further improve the sound insulation effect, and the reason for this may be: the foaming agent can enter air into the solution under the action of mechanical stirring, so that closed foam is generated in the matrix, and the sound insulation performance is further enhanced; under the coupling action of the foaming agent and the rubber particles, the porosity of the matrix can be effectively increased, and the structural characteristics of the holes are improved, so that the effects of sound absorption and insulation, elastic vibration reduction and the like are achieved, and the sound insulation effect of the sound insulation material is further improved.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.