CN107601989A - Rotten Marble Powder aerated concrete brick laying and preparation method thereof - Google Patents

Abstract

The invention provides metamorphic marble powder aerated concrete bricklaying and a preparation method thereof, which relate to the technical field of building materials. A kind of metamorphic marble powder aerated concrete bricklaying, the raw materials for preparing metamorphic marble powder aerated concrete bricklaying include: 30-50 parts of cement, 30-50 parts of sand, 40-60 parts of marble powder , 1-3 parts of hollow polymer microspheres, 5-15 parts of resin, 1-3 parts of curing agent, 1-3 parts of expansion agent, and 1-3 parts of water-retaining agent. The aerated concrete bricklaying adopts waste materials as raw materials, has low cost, and has the characteristics of high strength, impact resistance and earthquake resistance. A method for preparing metamorphic marble powder aerated concrete bricks, comprising: mixing raw materials with water, pouring into molds for static rest, cutting and curing in an autoclave. The method has a simple preparation process and is suitable for large-scale production.

Description

Metamorphic marble powder aerated concrete bricklaying and its preparation method

technical field

The invention relates to the technical field of building materials, and in particular to a metamorphic marble powder aerated concrete brick and a preparation method thereof.

Background technique

Since the advent of cement concrete, it has experienced the development process of low strength, medium strength, high strength and even ultra-high strength. It seems that people are always willing to pursue the continuous improvement of strength. However, in the past 40 to 50 years, accidents of premature failure and collapse of concrete structures due to material deterioration have been rare at home and abroad, and they are becoming more and more serious. The reinforcement of concrete structures has always been a hot topic. With the rapid development of the national economy and the improvement of people's living standards, people's demand for buildings is also constantly developing. Many existing buildings are , have been unable to meet the requirements of modern life, continue to strengthen and transform. Then, in the process of reinforcement and renovation, it is very important to use suitable materials to meet the construction requirements, the use function of the building, and the safety and environmental protection requirements.

Contents of the invention

The purpose of the present invention is to provide a kind of metamorphic marble powder aerated concrete bricklaying, the aerated concrete bricklaying uses waste materials as raw materials, has low cost, and has the characteristics of high strength, impact resistance and earthquake resistance.

Another object of the present invention is to provide a method for preparing metamorphic marble powder aerated concrete bricklaying, which has a simple preparation process and is suitable for large-scale production.

The present invention solves its technical problems by adopting the following technical solutions.

The present invention proposes a metamorphic marble powder aerated concrete bricklaying. The raw materials for preparing metamorphic marble powder aerated concrete bricklaying include: 30-50 parts of cement, 30-50 parts of sand, and 40 parts of marble powder. ～60 parts, 1～3 parts of hollow polymer microspheres, 5～15 parts of resin, 1～3 parts of curing agent, 1～3 parts of expansion agent, 1～3 parts of water retention agent, preferably 35～45 parts of cement, 35-45 parts of sand, 45-55 parts of marble powder, 1-3 parts of hollow polymer microspheres, 8-12 parts of resin, 1-3 parts of curing agent, 1-3 parts of expansion agent, and 1-3 parts of water-retaining agent.

The invention proposes a method for preparing metamorphic marble powder aerated concrete bricks, which includes: mixing raw materials with water, pouring them into molds and stopping, cutting and curing in an autoclave.

The beneficial effect of a kind of metamorphic marble powder aerated concrete bricklaying and its preparation method of the embodiment of the present invention is:

The invention discloses a metamorphic marble powder aerated concrete brick, which uses marble powder as a raw material, improves the mechanical strength of the aerated concrete brick, reduces deformation, improves temperature resistance, reduces cost, utilizes waste, and protects the environment. The particle size of marble powder is small, and it can be more evenly dispersed in aerated concrete bricklaying, which can enhance the mechanical balance of aerated concrete bricklaying. Hollow polymer microspheres can fill the defects caused by shrinkage during the shrinkage process. At the same time, due to the hollow structure, when impacted or shaken, the external force can be decomposed to play a buffering role, and it has better resistance Impact and shock resistance, and the structure of hollow polymer microspheres can reduce the dry bulk density of bricklaying. The resin curing reaction forms a three-dimensional cross-linked network structure. The hollow polymer microspheres, marble powder and resin have a synergistic effect, which makes the internal structure of the solidified aerated concrete brickwork more compact, and enhances the strength and resistance of the aerated concrete brickwork. Impact resistance, prevent cracking. Improve acid and alkali resistance. The water-retaining agent and the expansion agent act on the aerated concrete brickwork, and work together with the resin to make the solidification effect of the aerated concrete bricklaying good. The invention discloses a method for preparing metamorphic marble powder aerated concrete bricklaying. The method has simple preparation technology, strong controllability and is suitable for large-scale production.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

A metamorphic marble powder aerated concrete bricklaying and its preparation method according to the embodiment of the present invention will be described in detail below.

A kind of metamorphic marble powder aerated concrete bricklaying provided by the embodiment of the present invention, in parts by weight, the raw materials for preparing metamorphic marble powder aerated concrete bricklaying include: 30-50 parts of cement, 30-50 parts of sand, 40-60 parts of marble powder, 1-3 parts of hollow polymer microspheres, 5-15 parts of resin, 1-3 parts of curing agent, 1-3 parts of expansion agent, and 1-3 parts of water-retaining agent. Wherein cement can be 31 parts, 33 parts, 37 parts, 39 parts, sand can be 31 parts, 48 parts, marble powder can be 44 parts, 53 parts, hollow polymer microspheres can be 1.5 parts, 2.6 parts, resin can be For 6 parts, 14 parts.

Preferably, 35-45 parts of cement, 35-45 parts of sand, 45-55 parts of marble powder, 1-3 parts of hollow polymer microspheres, 8-12 parts of resin, 1-3 parts of curing agent, and 1-3 parts of expansion agent 1 to 3 parts of water retaining agent. Wherein cement can be 37 parts, 41 parts, 43 parts, sand can be 39 parts, 42 parts, 44 parts, marble powder can be 48 parts, 51 parts.

During the construction process, a large amount of waste materials, such as marble powder, will be produced. Such waste materials accumulate year by year, occupying wasteful land, posing a potential threat to the environment, and greatly restricting the development of the construction industry. In the present invention, marble powder is used as the main raw material to improve the mechanical strength of aerated concrete brickwork, reduce deformation, improve temperature resistance, reduce cost, utilize waste, and protect the environment. Compared with sand, the particle size of marble powder is finer, and it is more uniformly dispersed in aerated concrete bricklaying, which enhances the mechanical balance of aerated concrete bricklaying. Preferably, the particle size of the marble powder is 200-500 mesh.

Further, in a preferred embodiment of the present invention, the marble powder includes at least one of metamorphic marble powder, artificial marble waste and limestone gravel powder. Metamorphic marble is stronger than man-made marble, but man-made marble is cheap, light and easy to clean. Preferably, the marble powder includes metamorphic marble powder, artificial marble waste and limestone crushed stone powder with a mass ratio of 1 to 5:1 to 2:3. This proportion makes the cost of the marble powder lower and has a higher good strength.

Hollow polymer microsphere is a kind of material with special morphological structure and function, its hollow part can be gas, and some small molecular substances can also be encapsulated. When the aerated concrete bricks are solidified, there will be a certain shrinkage. The hollow polymer microspheres can fill the defects caused by shrinkage during the shrinkage process. , Decompose external force, play a buffer role, have good impact resistance and shock resistance, and the structure of hollow polymer microspheres can reduce the dry bulk density of bricklaying. Preferably, the hollow polymer microspheres are hollow polymethylmethacrylate microspheres. Furthermore, in a preferred embodiment of the present invention, the particle size of the hollow polymer microspheres is 1-10 μm, so as to ensure that the microspheres are evenly distributed in the aerated concrete brickwork, and better play a buffering role.

Adding resin as a raw material can enhance the cohesiveness of aerated concrete bricklaying and enhance the stability of the building. Due to the good bonding performance of resin, the cracking probability of aerated concrete bricklaying can be reduced. Further, in a preferred embodiment of the present invention, the resin includes at least one of bisphenol A epoxy resin, polyurethane modified epoxy resin and glycerin epoxy resin. The curing reaction between the epoxy resin and the curing agent forms a three-dimensional cross-linked network structure, which makes the aerated concrete brickwork denser, prevents the aerated concrete brickwork from cracking, improves mechanical properties, enhances impact strength, and improves acid and alkali resistance. Preferably, the polyurethane-modified epoxy resin forms an interpenetrating network polymer, and the two polymers of the polyurethane and the epoxy resin interpenetrate and mechanically entangle, which further enhances the mechanical properties of the aerated concrete bricklaying and reduces cracking. The curing agent in the present invention includes one of tetrahydrophthalic anhydride, methyl tetrahydrophthalic anhydride and methyl nadic anhydride.

The hollow polymer microspheres, marble powder and resin have a synergistic effect, which makes the internal structure of the solidified aerated concrete brickwork more compact, enhances the strength and impact resistance of the aerated concrete brickwork, and prevents cracking.

During the solidification process of air-entrained concrete bricklaying, the moisture will decrease, which will cause shrinkage and reduce the effect of hollow polymer microspheres. The expansion agent expands the volume of the aerated concrete brickwork and ensures the structure of the hollow polymer microspheres. In the present invention, calcium sulfoaluminate or calcium oxide is used as the expansion agent.

In order to reduce the shrinkage of the volume of the aerated concrete brick during the solidification process, a water-retaining agent is added to the raw material. The water-retaining agent and the expansion agent act on the aerated concrete brickwork, and work together with the resin to make the solidification effect of the aerated concrete bricklaying good. In the present invention, the water retaining agent includes hydroxypropyl methylcellulose or lignin and the like.

In the present invention, the raw material further includes 1-3 parts of organic silicon microspheres in parts by weight. Silicone microspheres are multifunctional special silicone resin microspheres with excellent water resistance, heat resistance and dispersibility. Improving the application performance of metamorphic marble powder aerated concrete bricklaying. At the same time, the silicone resin microspheres and the hollow polymer microspheres work synergistically to improve the impact resistance.

The invention provides a method for preparing metamorphic marble powder aerated concrete bricks, comprising:

The raw materials and water are weighed in proportion, specifically, the mass ratio of the raw materials to water is 5-7:1. Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 300-600 rpm for 5-20 minutes.

After pouring the mixture into the mold, stop it for 2-5 hours under the condition of 30-40°C, and maintain it in the autoclave after cutting.

The characteristics and performance of the present invention will be described in further detail below in conjunction with the examples.

Example 1

This embodiment provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 100 parts of marble powder, 1 part of hollow polymer microspheres, 5 parts of resin, 1 part of curing agent, 1 part of expansion agent, and 1 part of water retention agent. The mass ratio of raw material to water is 5:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 300rpm for 5min. After the mixture was poured into the mold, it was kept at 30° C. for 2 hours, and cured in an autoclave after cutting.

Example 2

This embodiment provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 49 parts of cement, 50 parts of sand, 60 parts of marble powder, 3 parts of hollow polymer microspheres, 14 parts of resin, 3 parts of curing agent, expansion agent 1 part, 3 parts of water retaining agent. The mass ratio of raw material to water is 7:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 600rpm for 20min. After the mixture was poured into the mold, it was kept at 40° C. for 4 hours, and cured in an autoclave after cutting.

Example 3

This embodiment provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 35 parts of cement, 35 parts of sand, 55 parts of marble powder, 3 parts of hollow polymer microspheres, 8 parts of resin, 1 part of curing agent, and expansion agent 1 part, water retaining agent 1 part. The mass ratio of raw material to water is 5.5:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 500rpm for 18min. After the mixture was poured into the mold, it was kept at 38° C. for 4 hours, and cured in an autoclave after cutting.

Example 4

This embodiment provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 45 parts of cement, 45 parts of sand, 45 parts of marble powder, 1 part of hollow polymer microspheres, 8 parts of resin, 1 part of curing agent, and expansion agent 1 part, water retaining agent 1 part. The mass ratio of raw material to water is 5:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retention agent and expansion agent with water, then add resin and curing agent and stir at 320 rpm for 8 minutes. After the mixture was poured into the mold, it was kept at 35° C. for 3 hours, and cured in an autoclave after cutting.

Example 5

This embodiment provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

Weigh the raw materials and water in proportion, and count the parts by weight. The main raw materials include: 40 parts of cement, 40 parts of sand, 60 parts of marble powder, 3 parts of hollow polymer microspheres, 12 parts of resin, 3 parts of curing agent, expansion agent 3 parts, 3 parts of water retaining agent, 3 parts of silicone microspheres. The mass ratio of raw material to water is 6:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 500rpm for 15min. After the mixture was poured into the mold, it was kept at 35° C. for 4 hours, and cured in an autoclave after cutting.

Comparative example 1

This comparative example provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 30 parts of cement, 30 parts of sand, 1 part of curing agent, 1 part of expansion agent, and 1 part of water-retaining agent. The mass ratio of raw material to water is 5:1.

Mix cement, sand, water retaining agent and expansion agent with water, then add curing agent and stir evenly. After the mixture was poured into the mold, it was left at room temperature for 2 hours, and cured in an autoclave after cutting.

Comparative example 2

This comparative example provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 30 parts of cement, 30 parts of sand, 40 parts of marble powder, 1 part of curing agent, 1 part of expansion agent, and 1 part of water-retaining agent. The mass ratio of raw material to water is 6:1.

Mix cement, sand, marble powder, hollow polymer microspheres, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 300-600 rpm for 5-20 minutes. After pouring the mixture into the mold, stop it for 2-5 hours under the condition of 30-40°C, and maintain it in the autoclave after cutting.

Comparative example 3

This comparative example provides a metamorphic marble powder aerated concrete brick, which is mainly prepared by the following steps:

The raw materials and water are weighed in proportion, and the main raw materials include: 35 parts of cement, 35 parts of sand, 55 parts of marble powder, 5 parts of resin, 1 part of curing agent, 1 part of expansion agent, and 1 part of water-retaining agent. The mass ratio of raw material to water is 5:1.

Mix cement, sand, marble powder, water retaining agent and expansion agent with water, then add resin and curing agent and stir at 450rpm for 16min. After pouring the mixture into the mold, stop at 34° C. for 3 hours, and maintain in an autoclave after cutting.

Comparative example 4

This comparative example provides a kind of common aerated concrete brickwork that is enough to buy on the market.

Test case

The aerated concrete bricks provided in Examples 1-5 and Comparative Examples 1-4 were selected and tested according to GB11968-2006 "Autoclaved Aerated Concrete Blocks", and the results are shown in Table 1.

Table 1 Performance test results

It can be seen from the above table that, compared with the metamorphic marble powder aerated concrete bricks provided in Comparative Examples 1 to 4, the metamorphic marble powder aerated concrete bricks provided in Examples 1 to 5 are added with resin, so Higher strength and lower dry bulk density. The dry bulk density of metamorphic marble powder aerated concrete bricks added with hollow polymer microspheres is lower than that of bricks without addition, indicating that hollow polymer microspheres can reduce dry bulk density. At the same time, the metamorphic marble powder aerated concrete bricks with added marble powder, hollow polymer microspheres and resin have higher strength. Among them, the performance of metamorphic marble powder aerated concrete bricklaying provided by Example 5 is the best, indicating that the ratio of raw materials and the preparation method are more scientific and reasonable.

In summary, a metamorphic marble powder aerated concrete brickwork uses marble powder as a raw material to improve the mechanical strength of aerated concrete brickwork, reduce deformation, improve temperature resistance, reduce costs, utilize waste, and protect the environment. The particle size of marble powder is small, and it can be more evenly dispersed in aerated concrete bricklaying, which can enhance the mechanical balance of aerated concrete bricklaying. Hollow polymer microspheres can fill the defects caused by shrinkage during the shrinkage process. At the same time, due to the hollow structure, when impacted or shaken, the external force can be decomposed to play a buffering role, and it has better resistance Impact and shock resistance, and the structure of hollow polymer microspheres can reduce the dry bulk density of bricklaying. The resin curing reaction forms a three-dimensional cross-linked network structure. The hollow polymer microspheres, marble powder and resin have a synergistic effect, which makes the internal structure of the solidified aerated concrete brickwork more compact, and enhances the strength and resistance of the aerated concrete brickwork. Impact resistance, prevent cracking. Improve acid and alkali resistance. The water-retaining agent and expansion agent act on the aerated concrete brickwork, and work together with the resin to make the solidification effect of the aerated concrete bricklaying good. A method for preparing metamorphic marble powder aerated concrete bricklaying, the method has simple preparation process, strong controllability, and is suitable for large-scale production.

The embodiments described above are some, not all, embodiments of the present invention. The detailed description of the embodiments of the invention is not intended to limit the scope of the claimed invention but to represent only selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Claims (10)

1. a kind of rotten Marble Powder aerated concrete brick laying, it is characterised in that count in parts by weight, prepare the rotten Dali The raw material of rock dust aerated concrete brick laying includes：30~50 parts of cement, 30~50 parts of sand, 40~60 parts of marble powder are hollow poly- 1~3 part of compound microballoon, 5~15 parts of resin, 1~3 part of curing agent, 1~3 part of swelling agent, 1~3 part of water-loss reducer, it is preferable that described 35~45 parts of cement, 35~45 parts of the sand, 45~55 parts of the marble powder, 1~3 part of the polymeric hollow microsphere, institute State 8~12 parts of resin, 1~3 part of the curing agent, 1~3 part of the swelling agent, 1~3 part of the water-loss reducer.

2. rotten Marble Powder aerated concrete brick laying according to claim 1, it is characterised in that the marble powder bag Include at least one of rotten Marble Powder, artificial marble dead meal and limestone rubble powder.

3. rotten Marble Powder aerated concrete brick laying according to claim 2, it is characterised in that the marble powder bag Mass ratio is included as 1~5:1~2:3 rotten Marble Powder, artificial marble dead meal and limestone rubble powder.

4. rotten Marble Powder aerated concrete brick laying according to claim 1, it is characterised in that the hollow polymer The particle diameter of microballoon is 1~10 μm.

5. rotten Marble Powder aerated concrete brick laying according to claim 1, it is characterised in that count in parts by weight, The raw material also includes 1~3 part of organosilicon microballoon.

6. rotten Marble Powder aerated concrete brick laying according to claim 1, it is characterised in that the resin includes double At least one of phenol A types epoxy resin, polyurethane modified epoxy resin and glycerol epoxy resin.

7. a kind of preparation method of rotten Marble Powder aerated concrete brick laying as described in any one of claim 1 to 6, it is special Sign is, including：Raw material is mixed with water, pour into mould it is quiet stop, cut after conserved in still kettle.

8. the preparation method of rotten Marble Powder aerated concrete brick laying according to claim 7, it is characterised in that described The mass ratio of raw material and the water is 5~7:1.

9. the preparation method of rotten Marble Powder aerated concrete brick laying according to claim 7, it is characterised in that bag Include：By the cement, the sand, the marble powder, the polymeric hollow microsphere, the water-loss reducer and the swelling agent Mixed with the water, add the resin and mixed with the curing agent.

10. the preparation method of rotten Marble Powder aerated concrete brick laying according to claim 9, it is characterised in that mixed Compound is quiet under conditions of 30~40 DEG C after pouring into mould to stop 2~5h.