1. A pc component waste regeneration technology is characterized in that: the pc component waste recycling process comprises the following steps:

1) and (3) preparing pc component waste regeneration raw materials: pc component waste, paint remover, sodium hydroxide and water;

2) adding the pc component waste block obtained in the step 1) and the water obtained in the step 1) into a stirrer together, and uniformly mixing and stirring the materials by the stirrer to separate a protective film, dust, sundries and the like attached to the surface of the pc component waste;

3) sequentially adding the paint remover and sodium hydroxide in the step 1) into a stirrer, and separating paint attached to the pc component waste through soaking of the paint remover and the sodium hydroxide and uniformly mixing and stirring of the stirrer;

4) taking out the pc component waste without the protective film, dust, paint and sundries in the step 3), washing with water, and dehydrating and drying to obtain recyclable pc component waste;

5) putting the pc component waste recyclable in the step 4) into a crusher, and crushing the pc component waste into a pc component waste block with similar size and volume;

6) and the regeneration process comprises the following raw material preparation: the pc component waste block obtained in the step 5), recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water;

7) weighing and mixing the pc component waste block in the step 6) and the recycled aggregate in proportion, adding the polyethylene glycol 600 in the step 6), and uniformly stirring to obtain a mixed material A;

8) uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent in the step 6) and the mixed material A in the step 7), preserving heat, standing and stacking, and naturally cooling to room temperature to obtain a mixed material B;

9) and uniformly mixing the river sand, the cement and the residual water in the step 6) with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc component waste.

2. A pc component scrap recycling process according to claim 1, characterised in that: the paint remover in the step 1) comprises the following components in percentage by weight: 15% of isopropanol, 12% of surfactant, 5% of triethanolamine, 40% of distilled water, 10% of anisole, 8% of propylene glycol, 5% of formic acid and 5% of dimethyl ether.

3. A pc component scrap recycling process according to claim 1, characterised in that: in the step 2), the temperature of the water in the stirrer is continuously heated and kept at 40 ℃.

4. A pc component scrap recycling process according to claim 1, characterised in that: in the step 3), the water temperature in the stirrer is continuously heated and kept at 55-60 ℃.

5. A pc component scrap recycling process according to claim 1, characterised in that: and 4) adding the paint remover and the sodium hydroxide into the stirrer in sequence, and heating to 90-100 ℃.

6. A pc component scrap recycling process according to claim 1, characterised in that: and 8), keeping the heat preservation and static stacking time at 3 h.

7. A pc component scrap recycling process according to claim 1, characterised in that: step 8) the temperature of the heat-preserving static stacking is kept at 50 ℃.

Background

PC is the english abbreviation for precast concrete (precast concrete) and is known in the field of housing industrialization as a PC member. Such as prefabricated reinforced concrete column foundation, prefabricated steel structure steel column foundation, street lamp billboard column reinforced concrete foundation and prefabricated floor slab. The corresponding traditional cast-in-place concrete needs site moulding, site pouring and site maintenance. The concrete prefabricated member is widely applied to the fields of buildings, traffic, water conservancy and the like, and plays an important role in national economy.

The PC component has the advantages of high efficiency, energy conservation, environmental protection, cost reduction, service function and performance improvement and the like. In the international construction field, the application form of the PC project is different from country to country and from region to region, and the PC project still belongs to the development and research stage in the continental region of China. In recent years, various new building concepts such as building industrialization, energy conservation and emission reduction, quality safety, ecological environment protection and the like bring development opportunities for PC components, a large amount of infrastructure construction in the urbanization process, large-scale guarantee rooms are urgently needed to standardize and quickly construct high-quality buildings, and wide space is provided for the PC components.

After the building is dismantled, a large amount of pc component waste exists in the construction site, and usually, the pc component waste can be recycled, but because a protective film, paint and the like are attached to the surface of part of the pc component waste, the pc component waste is difficult to recycle, so that how to recycle the pc component waste and effectively reduce the environmental burden is a social problem to be solved urgently.

Disclosure of Invention

In order to solve the technical problems, the invention provides a pc component waste recycling process, which aims to solve the problem that the surface of the c component waste is adhered with a protective film, paint and the like, so that the recycling is difficult.

The invention relates to a purpose and an effect of a pc component waste regeneration process, which are achieved by the following specific technical means:

a pc component scrap recycling process comprising the steps of:

1) and (3) preparing pc component waste regeneration raw materials: pc component waste, paint remover, sodium hydroxide and water;

2) adding the pc component waste block obtained in the step 1) and the water obtained in the step 1) into a stirrer together, and uniformly mixing and stirring the materials by the stirrer to separate a protective film, dust, sundries and the like attached to the surface of the pc component waste;

3) sequentially adding the paint remover and sodium hydroxide in the step 1) into a stirrer, and separating paint attached to the pc component waste through soaking of the paint remover and the sodium hydroxide and uniformly mixing and stirring of the stirrer;

4) taking out the pc component waste without the protective film, dust, paint and sundries in the step 3), washing with water, and dehydrating and drying to obtain recyclable pc component waste;

5) putting the pc component waste recyclable in the step 4) into a crusher, and crushing the pc component waste into a pc component waste block with similar size and volume;

6) and the regeneration process comprises the following raw material preparation: the pc component waste block obtained in the step 5), recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water;

7) weighing and mixing the pc component waste block in the step 6) and the recycled aggregate in proportion, adding the polyethylene glycol 600 in the step 6), and uniformly stirring to obtain a mixed material A;

8) uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent in the step 6) and the mixed material A in the step 7), preserving heat, standing and stacking, and naturally cooling to room temperature to obtain a mixed material B;

9) and uniformly mixing the river sand, the cement and the residual water in the step 6) with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc component waste.

Preferably, the paint remover in the step 1) comprises the following components in percentage by weight: 15% of isopropanol, 12% of surfactant, 5% of triethanolamine, 40% of distilled water, 10% of anisole, 8% of propylene glycol, 5% of formic acid and 5% of dimethyl ether.

Preferably, the temperature of the water in the mixer is kept at 40 ℃ during the step 2).

Preferably, the temperature of the water in the mixer is kept at 55-60 ℃ during the step 3).

Preferably, the paint remover and the sodium hydroxide in the step 4) are sequentially added into a stirrer, and then the temperature is heated to 90-100 ℃.

Preferably, the heat-preserving standing and stacking time in the step 8) is maintained at 3 h.

Preferably, the temperature of the heat-preserving static stack in step 8) is maintained at 50 ℃.

Compared with the prior art, the invention has the following beneficial effects:

the method comprises the steps of pretreating the pc component waste, separating protective films, dust, miscellaneous materials and the like attached to the surface of the pc component waste by uniformly stirring and water through a stirrer, separating paint attached to the pc component waste by subsequently adding a paint remover, soaking in sodium hydroxide and uniformly stirring through the stirrer, taking out the pc component waste without the protective films, the dust, the paint and the miscellaneous materials, washing with water, dehydrating and drying to obtain the recyclable pc component waste, putting the recyclable pc component waste into a crusher, and crushing the recyclable pc component waste into pc component waste blocks with similar sizes and volumes for later use.

When preparing the recycled concrete containing the pc component waste, preparing recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water, firstly weighing and mixing a to-be-used pc component waste block and the recycled aggregate according to a proportion, adding the polyethylene glycol 600, stirring uniformly to obtain a mixed material A, then uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent and the mixed material A, preserving heat, standing and stacking for 3h, naturally cooling to room temperature to obtain a mixed material B, finally uniformly mixing and stirring river sand, cement and the rest water with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc member waste material. And also replaces the natural aggregate in the traditional concrete, reduces the consumption of the natural aggregate in the construction industry, and greatly reduces the production cost.

Detailed Description

The following examples further describe embodiments of the present invention in detail. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "leading," "trailing," and the like are used in an orientation or positional relationship indicated for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

the invention provides a pc component waste regeneration process, which comprises the following steps:

1) and (3) preparing pc component waste regeneration raw materials: pc component waste, paint remover, sodium hydroxide and water;

2) adding the pc component waste block obtained in the step 1) and the water obtained in the step 1) into a stirrer together, and uniformly mixing and stirring the materials by the stirrer to separate a protective film, dust, sundries and the like attached to the surface of the pc component waste;

3) sequentially adding the paint remover and sodium hydroxide in the step 1) into a stirrer, and separating paint attached to the pc component waste through soaking of the paint remover and the sodium hydroxide and uniformly mixing and stirring of the stirrer;

4) taking out the pc component waste without the protective film, dust, paint and sundries in the step 3), washing with water, and dehydrating and drying to obtain recyclable pc component waste;

5) putting the pc component waste recyclable in the step 4) into a crusher, and crushing the pc component waste into a pc component waste block with similar size and volume;

6) and the regeneration process comprises the following raw material preparation: the pc component waste block obtained in the step 5), recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water;

7) weighing and mixing the pc component waste block in the step 6) and the recycled aggregate in proportion, adding the polyethylene glycol 600 in the step 6), and uniformly stirring to obtain a mixed material A;

8) uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent in the step 6) and the mixed material A in the step 7), preserving heat, standing and stacking, and naturally cooling to room temperature to obtain a mixed material B;

9) and uniformly mixing the river sand, the cement and the residual water in the step 6) with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc component waste.

Wherein, the paint remover in the step 1) comprises the following components in percentage by weight: 15% of isopropanol, 12% of surfactant, 5% of triethanolamine, 40% of distilled water, 10% of anisole, 8% of propylene glycol, 5% of formic acid and 5% of dimethyl ether.

Wherein the water temperature in the stirrer in the step 2) is continuously heated and kept at 40 ℃.

Wherein, in the step 3), the water temperature in the stirrer is continuously heated and kept at 55-60 ℃.

Wherein, the paint remover and the sodium hydroxide are sequentially added into the stirrer in the step 4), and then the temperature is heated to 90-100 ℃.

Wherein, the heat preservation and static placement stacking time in the step 8) is maintained at 3 h.

Wherein, the temperature of the heat-preserving static stacking is kept at 50 ℃ in the step 8).

Table 1: the recycled concrete prepared in example 1 was poured into concrete blocks of 2m × 0.25m, and the concrete blocks were then placed in clear water and brine (30% by mass aqueous sodium chloride solution) and cured to a predetermined age, and the flexural strength (MPa) of the concrete was measured by a concrete pressure tester, and the results are shown in the following table:

example 2:

the invention provides a pc component waste regeneration process, which comprises the following steps:

1) and (3) preparing pc component waste regeneration raw materials: pc component waste, paint remover, sodium hydroxide and water;

2) adding the pc component waste block obtained in the step 1) and the water obtained in the step 1) into a stirrer together, and uniformly mixing and stirring the materials by the stirrer to separate a protective film, dust, sundries and the like attached to the surface of the pc component waste;

3) sequentially adding the paint remover and sodium hydroxide in the step 1) into a stirrer, and separating paint attached to the pc component waste through soaking of the paint remover and the sodium hydroxide and uniformly mixing and stirring of the stirrer;

4) taking out the pc component waste without the protective film, dust, paint and sundries in the step 3), washing with water, and dehydrating and drying to obtain recyclable pc component waste;

5) putting the pc component waste recyclable in the step 4) into a crusher, and crushing the pc component waste into a pc component waste block with similar size and volume;

6) and the regeneration process comprises the following raw material preparation: the pc component waste block obtained in the step 5), recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water;

7) weighing and mixing the pc component waste block in the step 6) and the recycled aggregate in proportion, adding the polyethylene glycol 600 in the step 6), and uniformly stirring to obtain a mixed material A;

8) uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent in the step 6) and the mixed material A in the step 7), preserving heat, standing and stacking, and naturally cooling to room temperature to obtain a mixed material B;

9) and uniformly mixing the river sand, the cement and the residual water in the step 6) with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc component waste.

Wherein, the paint remover in the step 1) comprises the following components in percentage by weight: 15% of isopropanol, 12% of surfactant, 5% of triethanolamine, 40% of distilled water, 10% of anisole, 8% of propylene glycol, 5% of formic acid and 5% of dimethyl ether.

Wherein the water temperature in the stirrer in the step 2) is continuously heated and kept at 40 ℃.

Wherein, in the step 3), the water temperature in the stirrer is continuously heated and kept at 55-60 ℃.

Wherein, the paint remover and the sodium hydroxide are sequentially added into the stirrer in the step 4), and then the temperature is heated to 90-100 ℃.

Wherein, the heat preservation and static placement stacking time in the step 8) is maintained at 1.5 h.

Wherein, the temperature of the heat-preserving static stacking is kept at 45 ℃ in the step 8).

Table 2: the recycled concrete prepared in example 2 was poured into concrete blocks of 2m × 0.25m, and the concrete blocks were then placed in clear water and brine (30% by mass aqueous sodium chloride solution) and cured to a predetermined age, and the flexural strength (MPa) of the concrete was measured by a concrete pressure tester, and the results are shown in the following table:

example 3:

the invention provides a pc component waste regeneration process, which comprises the following steps:

1) and (3) preparing pc component waste regeneration raw materials: pc component waste, paint remover, sodium hydroxide and water;

2) adding the pc component waste block obtained in the step 1) and the water obtained in the step 1) into a stirrer together, and uniformly mixing and stirring the materials by the stirrer to separate a protective film, dust, sundries and the like attached to the surface of the pc component waste;

3) sequentially adding the paint remover and sodium hydroxide in the step 1) into a stirrer, and separating paint attached to the pc component waste through soaking of the paint remover and the sodium hydroxide and uniformly mixing and stirring of the stirrer;

4) taking out the pc component waste without the protective film, dust, paint and sundries in the step 3), washing with water, and dehydrating and drying to obtain recyclable pc component waste;

5) putting the pc component waste recyclable in the step 4) into a crusher, and crushing the pc component waste into a pc component waste block with similar size and volume;

6) and the regeneration process comprises the following raw material preparation: the pc component waste block obtained in the step 5), recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water;

7) weighing and mixing the pc component waste block in the step 6) and the recycled aggregate in proportion, adding the polyethylene glycol 600 in the step 6), and uniformly stirring to obtain a mixed material A;

8) uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent in the step 6) and the mixed material A in the step 7), preserving heat, standing and stacking, and naturally cooling to room temperature to obtain a mixed material B;

9) and uniformly mixing the river sand, the cement and the residual water in the step 6) with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc component waste.

Wherein, the paint remover in the step 1) comprises the following components in percentage by weight: 15% of isopropanol, 12% of surfactant, 5% of triethanolamine, 40% of distilled water, 10% of anisole, 8% of propylene glycol, 5% of formic acid and 5% of dimethyl ether.

Wherein the water temperature in the stirrer in the step 2) is continuously heated and kept at 40 ℃.

Wherein, in the step 3), the water temperature in the stirrer is continuously heated and kept at 55-60 ℃.

Wherein, the paint remover and the sodium hydroxide are sequentially added into the stirrer in the step 4), and then the temperature is heated to 90-100 ℃.

Wherein, the heat preservation and static placement stacking time in the step 8) is maintained at 3.5 h.

Wherein, the temperature of the heat-preserving static stacking is kept at 55 ℃ in the step 8).

Table 3: the recycled concrete prepared in example 3 was poured into a concrete block of 2m x 0.25m, and the concrete block was then cured in clear water and brine (30% by mass sodium chloride aqueous solution) for a predetermined period of time, and the flexural strength (MPa) of the concrete was measured by a concrete pressure tester, and the results are shown in the following table:

comparing the numerical values of the experimental results shown in tables 1-3 in examples 1-3, weighing and mixing a pc component waste block and a recycled aggregate according to a proportion, adding polyethylene glycol 600, uniformly stirring to obtain a mixed material A, uniformly mixing and stirring with a polycarboxylic acid high-performance water reducing agent, keeping the temperature, standing, stacking for 3 hours, keeping the temperature at 50 ℃, subsequently naturally cooling to room temperature to obtain a mixed material B, uniformly mixing and stirring with river sand, cement and the rest water, and obtaining the recycled concrete containing the pc component waste with optimal performance data;

firstly, pretreating pc component waste, separating protective films, dust, miscellaneous materials and the like attached to the surface of the pc component waste by uniformly stirring and mixing with water through a stirrer, separating paint attached to the pc component waste by subsequently adding a paint remover and sodium hydroxide for soaking and uniformly mixing and stirring through the stirrer, then taking out the pc component waste without the protective films, the dust, the paint and the miscellaneous materials, washing with water, dehydrating and drying to obtain recyclable pc component waste, putting the recyclable pc component waste into a crusher, and crushing the recyclable pc component waste into pc component waste blocks with similar sizes and volumes for later use;

when preparing the recycled concrete containing the pc component waste, preparing recycled aggregate, river sand, a polycarboxylic acid high-performance water reducing agent, cement, polyethylene glycol 600 and water, firstly weighing and mixing a to-be-used pc component waste block and the recycled aggregate according to a proportion, adding the polyethylene glycol 600, stirring uniformly to obtain a mixed material A, then uniformly mixing and stirring the polycarboxylic acid high-performance water reducing agent and the mixed material A, preserving heat, standing and stacking for 3h, naturally cooling to room temperature to obtain a mixed material B, finally uniformly mixing and stirring river sand, cement and the rest water with the mixed material B, and uniformly mixing to obtain the recycled concrete containing the pc member waste material. And also replaces the natural aggregate in the traditional concrete, reduces the consumption of the natural aggregate in the construction industry, and greatly reduces the production cost.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.