阅读说明：本技术 一种自修复蛋白基水泥发泡剂 (Self-repairing protein-based cement foaming agent ) 是由 马石保 于 2021-08-31 设计创作，主要内容包括：本发明公开一种自修复蛋白基水泥发泡剂,其包括以下原料：蛋白原液、连二亚硫酸钠、氧化锌、氯化钙、氯化钠、稳定剂、螯合剂、己二醇、防腐剂。本发明的蛋白基的水泥发泡剂制备简单、与水泥的相容性强,且其在混泡操作过程中能够对泡沫进行自修复,在水泥浆料中能够达到少消泡甚至不消泡,泡沫稳定,其在制备的泡沫混凝土中的泡沫大多数为更为稳定的闭孔结构,所制备的泡沫混凝土制品的轻质、力学性能(尤以抗压强度)、热学性能等更为优异,其可使容重500kg/m～(3)的轻质泡沫混凝土制品的抗压强度达到4-8MPa。(The invention discloses a self-repairing protein-based cement foaming agent which comprises the following raw materials: the feed additive comprises a protein stock solution, sodium hydrosulfite, zinc oxide, calcium chloride, sodium chloride, a stabilizer, a chelating agent, hexanediol and a preservative. The protein-based cement foaming agent disclosed by the invention is simple to prepare and strong in compatibility with cement, can self-repair foam in the foam mixing operation process, can achieve little or even no defoaming in cement slurry, is stable in foam, mostly has a more stable closed-cell structure in the prepared foam concrete, and the prepared foam concrete product is more excellent in light weight, mechanical properties (especially compressive strength), thermal properties and the like, and can enable the volume weight to be 500kg/m 3 The compressive strength of the light foam concrete product reaches 4-8 MPa.)

1. The self-repairing protein-based cement foaming agent is characterized by comprising the following raw materials: the feed additive comprises a protein stock solution, sodium hydrosulfite, zinc oxide, calcium chloride, sodium chloride, a stabilizer, a chelating agent, hexanediol and a preservative.

2. The self-repairing protein-based cement foaming agent of claim 1, which is characterized by comprising the following raw materials in parts by weight: 2-10 parts of protein stock solution, 2-10 parts of sodium hydrosulfite, 3-7 parts of zinc oxide, 2-8 parts of calcium chloride, 1-7 parts of sodium chloride, 1-5 parts of stabilizer, 1-5 parts of chelating agent, 1-8 parts of hexanediol and 1-3 parts of preservative.

3. The self-repairing protein-based cement foaming agent according to claim 1 or 2, wherein the protein stock solution is an animal protein stock solution.

4. The self-repairing protein-based cement foaming agent of claim 3, wherein the animal protein stock solution is an animal keratin protein stock solution.

5. The self-repairing protein-based cement foaming agent of claim 3, wherein the protein stock solution is prepared by hydrolyzing one or more animal raw materials with an alkali, and the alkali is sodium hydroxide or potassium hydroxide.

6. The self-repairing protein-based cement foaming agent of claim 3, wherein the protein stock solution is prepared from one or more animal raw materials by protease hydrolysis.

7. The self-repairing protein-based cement foaming agent of claim 5 or 6, wherein the animal raw material comprises one or more of animal offal, hair, hoof and horn, and blood.

8. The self-repairing protein-based cement foaming agent of claim 1, wherein the stabilizer is a surfactant, and the chelating agent is one or more of sodium citrate or polyphosphate, aminocarboxylic acid, 1, 3-diketone, hydroxycarboxylic acid, and polyamine.

9. The preparation method of the self-repairing protein-based cement foaming agent according to any one of claims 1 to 8, characterized by comprising the following preparation steps:

1) weighing the ingredients according to the amount;

2) adding the weighed calcium chloride and zinc oxide into the protein stock solution to obtain a component A;

3) adding the weighed sodium chloride and sodium hydrosulfite into deionized water to obtain a component B solution;

4) adding the component B solution prepared in the step 3) into the component A solution prepared in the step 2), heating to a certain temperature, keeping for 12-14 hours, and then cooling to room temperature to obtain a component C;

5) adding a stabilizer, a chelating agent and hexanediol into the component C prepared in the step 4), and uniformly mixing to prepare the protein-based cement foaming agent.

10. The preparation method of the self-repairing protein-based cement foaming agent of claim 7, wherein the weight concentration of the B component solution in the step 3) is 10% -60%, and the heating temperature in the step 4) is 200 ℃.

Technical Field

The invention relates to the technical field of light high-strength building materials, in particular to a self-repairing protein-based cement foaming agent.

Background

In recent years, foam concrete has been increasingly emphasized in the field of construction because of its light weight, high strength, good thermal insulation performance, fire-resistant sound insulation performance, etc., and is used as a thermal insulation energy-saving material for multi-gap buildings, a thermal insulation layer for floor and wall, a thermal insulation layer for roof, an engineering protection wall, a landscape material, a pipeline, a fire-resistant material, etc. With the continuous expansion of the application range, higher and higher requirements are put forward on the product quality of the foam concrete. The high-quality foam concrete can be prepared without leaving high-quality cement foaming agent. The existing cement foaming agent uses traditional raw materials, has poor compatibility, poor foaming effect and low foam stability, and slurry after foam mixing is easy to separate and collapse, so that the quality of prepared foam concrete cannot reach high-requirement high standard and the performance is poor.

Disclosure of Invention

Therefore, based on the background, the invention provides the self-repairing protein-based cement foaming agent which is stable in foam and good in compatibility with cement.

The technical scheme provided by the invention is as follows:

a self-repairing protein-based cement foaming agent comprises the following raw materials: the feed additive comprises a protein stock solution, sodium hydrosulfite, zinc oxide, calcium chloride, sodium chloride, a stabilizer, a chelating agent, hexanediol and a preservative.

Further, the feed additive comprises the following raw materials in parts by weight: 2-10 parts of protein stock solution, 2-10 parts of sodium hydrosulfite, 3-7 parts of zinc oxide, 2-8 parts of calcium chloride, 1-7 parts of sodium chloride, 1-5 parts of stabilizer, 1-5 parts of chelating agent, 1-8 parts of hexanediol and 1-3 parts of preservative.

Further, the protein stock solution is an animal protein stock solution.

Further, the animal protein stock solution is animal keratin stock solution.

Further, the protein stock solution is prepared by hydrolyzing one or more animal raw materials with alkali, wherein the alkali is sodium hydroxide or potassium hydroxide.

Further, the protein stock solution is prepared by hydrolyzing one or more animal raw materials by protease.

Preferably, the protein stock solution is prepared by alkaline hydrolysis of one or more animal raw materials.

Further, the animal raw material comprises one or more of animal leftovers, hair, hoof and horn, and blood.

Further, the stabilizing agent is a surfactant, and the chelating agent is one or more of sodium citrate or polyphosphate, aminocarboxylic acid, 1, 3-diketone, hydroxycarboxylic acid, polyamine and the like. Preferably, the chelating agent is sodium citrate.

The invention also provides a preparation method of the self-repairing protein-based cement foaming agent prepared from the ingredients, which comprises the following steps:

1) weighing the ingredients according to the amount;

2) adding the weighed calcium chloride and zinc oxide into the protein stock solution to obtain a component A;

3) adding the weighed sodium chloride and sodium hydrosulfite into deionized water to obtain a component B solution;

4) adding the component B solution prepared in the step 3) into the component A solution prepared in the step 2), heating to a certain temperature, keeping for 12-14 hours, and then cooling to room temperature to obtain a component C;

5) adding a stabilizer, a chelating agent and hexanediol into the component C prepared in the step 4), and uniformly mixing to prepare the protein-based cement foaming agent.

Further, the weight concentration of the component B solution in the step 3) is 10-60%, and the heating temperature in the step 4) is 200 ℃. .

Furthermore, the foaming agent prepared above is diluted 30-100 times by using water in quantity when used.

By adopting the scheme, the beneficial effects of the realization are as follows:

the protein-based cement foaming agent disclosed by the invention is simple to prepare and strong in compatibility with cement, can self-repair foam in the foam mixing operation process, can achieve little or even no defoaming in cement slurry, is fine and stable in foam, and is used for foaming cementMost of foams in the prepared foam concrete are of more stable closed cell structures, and the prepared foam concrete product has more excellent light weight, mechanical properties (especially compressive strength), thermal properties and the like, and can lead the volume weight to be 500kg/m³The compressive strength of the light foam concrete product reaches 4-8 MPa.

Drawings

FIG. 1 is a photomicrograph of the interior of concrete prepared with the blowing agent of the present invention in an example;

FIG. 2 is a photomicrograph of a foam prepared using a foaming machine with the blowing agent of the present invention in an example.

Detailed Description

The invention is further illustrated by the following examples, but the scope of the invention as claimed is not limited to the examples.

Example 1: the self-repairing protein-based cement foaming agent is prepared from the following ingredients in parts by weight: 2-10 parts of protein stock solution, 2-10 parts of sodium hydrosulfite, 3-7 parts of zinc oxide, 2-8 parts of calcium chloride, 1-7 parts of sodium chloride, 1-5 parts of stabilizer, 1-5 parts of sodium citrate, 1-8 parts of hexanediol and 1-3 parts of preservative.

The preparation method comprises the following steps:

1) weighing the ingredients according to the amount;

2) adding the weighed calcium chloride and zinc oxide into the protein stock solution to obtain a component A;

3) adding the weighed sodium chloride and sodium hydrosulfite into deionized water to obtain a component B solution with the mass concentration of 60%;

4) adding the component B solution prepared in the step 3) into the component A solution prepared in the step 2), heating to 200 ℃, keeping for 12-14 hours, and then cooling to room temperature to obtain a component C;

5) adding a stabilizer, a chelating agent and hexanediol into the component C prepared in the step 4), and uniformly mixing to prepare the protein-based cement foaming agent.

1. Foam Performance testing

1) Sample preparation

And (3) taking 100g of prepared foaming agent, adding 4000g of deionized water for dilution, wherein the foam prepared by the foaming machine can bear a compression-resistant test block with the weight of 600g, and the foam has high mechanical strength. The detection results are shown in the table I, and the micro-structure and the macro-structure of the foam are shown in the figures 1 and 2.

Table one: foam property test results

As can be seen from Table I, the blowing agent of the present invention has excellent foaming properties and stable foam. And it is apparent from FIG. 1 that the cell walls have a certain thickness, which is beneficial to increase the compressive strength of the product; from fig. 2, it can be seen that the foam body has fine and smooth foam and uniform distribution.

2. Testing of foam concrete Properties

1) Preparation of foamed concrete

The equipment required for preparing the foam concrete is as follows: a foam concrete mixer, a foaming machine and a mould.

Weighing 7 groups of concrete raw materials according to the weight ratio of 5-10 parts of cement, 8-12 parts of mineral powder, 2.5-4 parts of water and 0-25 parts of sand, and weighing a proper amount of prepared foaming agent;

secondly, respectively adding the cement, the mineral powder, the water, the sand and the water which are weighed in the step one into a stirrer, and stirring the mixture into slurry for later use;

thirdly, adding water to dilute the foaming agent weighed in the step one according to the proportion of 1:40, and injecting the diluted foaming agent into a foaming machine for foaming;

adding the foam generated by the foaming machine in the step III into the slurry prepared in the step II, and uniformly stirring;

fifthly, pouring the mixture obtained in the step IV into a mould, and removing the mould after the cement is solidified.

And (3) detecting the performance of the prepared foam concrete, wherein the detection result is shown in the second table.

Table two: foam concrete proportion and performance detection result

Item	Sample No. 1	Sample No. 2	Sample No. 3	Sample No. 4	Sample No. 5	Sample No. 6	Sample 7
								Density (kg/m)3)	300	500	700	800	1000	1200	1300
28D compressive strength (Mpa)	2.5	3.5	6.5	7.5	8.5	10	15
								Thermal conductivity (W/(m. degree)K))	0.068	0.098	0.11	0.15	0.22	0.25	0.28
Cement (kg)	125.8	200	275	240	314	361	393
								Mineral powder (kg)	188.8	300	412.5	560	734	253	275
Sand (kg)	-----	-------	-----	-------	------	591	642
								Water (kg)	85	135	180	230	300	300	325
Foam (M3/M3)	0.84	0.72	0.65	0.58	0.49	0.4	0.35

Remarking: the compressive strength data are detected by a TYB-300B type pressure tester produced by Jiangsu Wuxi building instrument experimental equipment Co.

The heat conductivity was measured by a CD-DR6060 type heat conductivity measuring instrument manufactured by Shenyang purple micro constant measuring apparatus Ltd.

The foaming agent is detected according to the specification of JCT2199-2013 foaming agent for foam concrete.

The results of fig. 1, fig. 2, table one and table two show that the foam prepared by the foaming agent of the invention has a closed cell structure similar to a sphere, the foaming performance is excellent, the foam is stable, and the prepared concrete has excellent compression resistance and thermal property.

Compared with the cement foaming agent circulated in the current market, the cement foaming agent has more excellent performance:

1. pouring height of foam concrete: at present, the cement foaming agent in the market is poured to the maximum height of 1.2 m under the same volume weight (the national standard volume weight grade is from B03-B13), namely, the phenomena of upper and lower layering and overall die collapse occur. The cement foaming agent can be poured to 3-5 m under the same volume weight (the international volume weight level is from B03-B13), and the Shandong Weifang Honghong building materials company uses the cement foaming agent to pour a 3 m high wall, so that the wall is stable and beautiful; the Anhui Fuyang Jibang building materials Limited company uses the cement foaming agent to produce the lightweight wallboard with excellent performance.

2. The compressive strength of a B07 volume weight test piece using the cement foaming agent can reach 10MPA under the same volume weight and the same proportion, while the foaming agent in the current market is only 7-8 MPA.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.