阅读说明：本技术 一种以装修垃圾分拣物为原料生产再生骨料的方法 (Method for producing recycled aggregate by using sorted decoration garbage as raw material ) 是由 过震文 宰正浩 徐斌 何昌轩 叶琪 王辉 于 2019-08-30 设计创作，主要内容包括：本发明公开一种以装修垃圾分拣物为原料生产再生骨料的方法,其特征在于,对经过破碎处理后粒径在5－15mm、15－30mm的骨料外表,包裹一层经配置的水泥浆体,经充分养护后,形成轻质再生骨料。经本发明处理过的装修垃圾分拣物,由于均匀的包裹了一层水泥浆料,各项性能均有所改善,尤其是吸水率指标的改善,体现在吸水率的一致性。可作为多领域,多方面的材料替代。具体来说,该再生骨料能作为轻质混凝土骨料、墙体板材的原料使用；或可以替代同粒径天然石材,作为屋顶花园导水材料使用；当添加了彩色颜料包裹后,可作为景观绿化表面的覆盖料使用,既可以替代轻质陶粒使用,又可调节石子的色彩。(The invention discloses a method for producing recycled aggregate by using sorted decoration garbage as raw materials, which is characterized in that a layer of prepared cement paste is wrapped on the surface of the aggregate with the particle size of 5-15 mm and 15-30 mm after crushing treatment, and the lightweight recycled aggregate is formed after full maintenance. The decorative garbage sorting object treated by the invention is uniformly coated with a layer of cement slurry, so that various performances are improved, particularly the water absorption index is improved, and the water absorption index is reflected in the consistency of water absorption. Can be used as a substitute for materials in multiple fields and aspects. Specifically, the recycled aggregate can be used as a raw material of lightweight concrete aggregate and wall plates; or can replace natural stone with the same grain diameter to be used as a water guide material of roof gardens; when the colorful pigment is added for coating, the coating can be used as a covering material for landscaping surfaces, can replace light ceramsite, and can adjust the color of stones.)

1. A method for producing recycled aggregate by using sorted decoration garbage as raw materials is characterized in that a layer of prepared cement slurry is wrapped on the surface of the aggregate with the particle size of 5-15 mm and 15-30 mm after crushing treatment, and the lightweight recycled aggregate is formed after full maintenance.

2. The method for producing recycled aggregate from the sorted decoration garbage as claimed in claim 1, wherein the inorganic pigment is added during the covering of the cement paste, and the cement paste is fully cured to form the colored lightweight recycled aggregate.

3. The method for producing recycled aggregate from the sorted decoration garbage as claimed in claim 1, wherein the production method comprises the steps of:

step 1, taking the sorted decoration garbage as a raw material, and soaking the crushed aggregates with the particle sizes of 5-15 mm and 15-30 mm in water to fully absorb water;

step 2, stirring and mixing ordinary portland cement and dry fly ash in a weight ratio of 1: 1-2 to obtain powder;

step 3, continuously feeding the water-soaked aggregate and the prepared powder into a rotating granulator according to the weight ratio of 1: 0.1-0.15, and discharging the aggregate out of the granulator after the aggregate is wrapped by cement slurry by the granulator, and feeding the aggregate into a vibrating screening machine to screen out redundant powder; returning the sieved powder material to a granulator, and feeding the sieved aggregate into a next vibrating conveying maintenance machine; the materials are primarily cured and lose viscosity in the vibration conveying process, and then enter a finished product curing room for static curing, so that the cement paste wrapped by the materials is finally cured.

4. The method for producing recycled aggregate from the sorted decoration refuse as claimed in claim 3, wherein the Portland cement is R-type Portland cement.

5. The method for producing recycled aggregate from the sorted decoration refuse as claimed in claim 2, wherein the inorganic pigment of iron oxide group is added in an amount of 4-6% by mass of the total mass, and is uniformly mixed with Portland cement and dry fly ash.

6. The method for producing recycled aggregate from the sorted decoration garbage as claimed in claim 3, wherein the sulphoaluminate cement is selected to replace the Portland cement or the accelerator is added in the step 2 in order to control the setting time of the coating slurry.

7. The method for producing recycled aggregate from the sorted decoration garbage as claimed in claim 6, wherein the accelerating agent is sodium aluminate or sodium carbonate, and the mixing amount is 5-10% (by weight) of the cement amount.

Technical Field

The invention belongs to the technical field of garbage disposal, in particular to the technical field of treatment of decoration garbage, and discloses a method for producing recycled aggregate by using a decoration garbage sorting object as a raw material.

Background

With the development of economy and the progress of science and technology, more and more decoration and decoration garbage are generated for residents. The garbage refers to garbage generated by decoration, and is different from household garbage in that decoration and decoration garbage is mostly broken cement, useless wood strips, blocks and the like, and generally has no recycling value. The treatment of garbage is also different from that of domestic garbage. The construction waste is different from the disposal of the construction waste, and the construction waste refers to residue soil, waste materials, residual mud and other wastes generated in the process of constructing, laying, dismantling and repairing various buildings, structures, pipe networks and the like by construction units or individuals. Generally has no recycling value.

After sorting and impurity removal treatment is carried out on the existing decoration and decoration garbage, a material with broken bricks (broken red bricks and broken light building blocks) and broken mortar as main components can be obtained, and the material is crushed and screened to obtain the following materials with three grain sizes (or other grain sizes are adopted according to requirements):

specification of	Powder and granular material	First aggregate	Aggregate II
				Particle size	0－5mm	5－15mm	15－30mm

The powder material in the table can be directly used by being mixed with raw materials for manufacturing baking-free bricks or other concrete small components.

The aggregate I and the aggregate II in the table have low strength, high crushing value, large water absorption difference and non-uniform apparent color and luster because the main components are broken bricks and mortar, and are difficult to be directly utilized as raw materials in engineering or other aspects.

Therefore, after the first aggregate and the second aggregate are improved by adopting any technical means, the requirements of improving the strength, reducing the crushing value, reducing the difference of water absorption and changing (unifying) color are met, so that the application range of the aggregate is expanded, the component which is most difficult to utilize in decoration garbage is changed in performance so as to be suitable for the related technical requirements to be utilized, and the improvement of the use value becomes the proposition of research.

Disclosure of Invention

The invention aims to provide a method for producing recycled aggregate by using a decoration garbage sorting object as a raw material, so as to solve the problems in the prior art.

The specific technical scheme of the invention is as follows:

a method for producing recycled aggregate by using sorted decoration garbage as raw materials comprises the steps of wrapping a layer of prepared cement paste on the surface of aggregate with the particle sizes of 5-15 mm and 15-30 mm after crushing treatment, and forming light recycled aggregate after full maintenance.

Furthermore, inorganic pigment can be doped when the cement paste is coated, and the color lightweight recycled aggregate is obtained after full curing.

The more specific production method comprises the following steps:

1. the method comprises the following steps of (1) taking a decoration garbage sorting object as a raw material, and soaking aggregates with particle sizes of 5-15 mm and 15-30 mm after crushing treatment in water to enable the aggregates to fully absorb water;

2. stirring and mixing ordinary portland cement and dry fly ash in a weight ratio of 1: 1-2 to obtain powder;

3. the aggregate soaked by water and the prepared powder are continuously put into a rotating granulator according to the weight ratio of 1: 0.1-0.15, the surface of the aggregate can stick and absorb the prepared powder due to the moisture content to form an adhesive layer, and the strength of the adhesive layer is enhanced in the rotating process of the granulator, so that the granulator is not easy to separate from . After the aggregates are wrapped by the cement paste by the granulator, the aggregates are automatically discharged out of the granulator and enter a vibrating screening machine to screen out redundant powder materials; the powder material under the screen is returned to the ball forming mill, and the aggregate on the screen enters the next vibrating conveying maintenance machine.

Furthermore, in the steps, as the cement slurry wrapped by the aggregate is limited by the technical index of cement condensation time, the surface of the prepared material has certain viscosity, and the materials are mutually bonded and difficult to separate if direct accumulation and maintenance are carried out at the moment, therefore, the technical mode of vibration conveying and maintenance is adopted, the vibration conveying mode is selected, the conveying trough body is of a steel structure, and the top and two sides of the trough body can be subjected to heat preservation and heating (steam heating); the materials are primarily cured and lose viscosity in the vibration conveying process, and then enter a finished product curing room for static curing, so that the cement paste wrapped by the materials is finally cured.

Further, the Portland cement is R-type Portland cement.

Further, if it is necessary to prepare a colored lightweight recycled aggregate, an iron oxide-based inorganic pigment may be added to the aggregate in step 2 in an amount of 4 to 6% by mass of the total mass, and the mixture may be uniformly mixed with ordinary portland cement and dry fly ash.

Furthermore, in order to control the setting time of the wrapping slurry, sulphoaluminate cement can be used to replace ordinary portland cement in the step 2, or a proper amount of accelerating agent is added.

Furthermore, the accelerating agent is sodium aluminate or sodium carbonate, and the mixing amount is 5-10% (weight percentage) of the cement dosage.

The decorative garbage sorting object treated by the invention (the aggregates with the particle sizes of 5-15 mm and 15-30 mm, corresponding to the aggregates I and II) is uniformly coated with a layer of cement slurry, so that various performances are improved, particularly the water absorption index is improved, and the consistency of water absorption is reflected. Can be used as a substitute for materials in multiple fields and aspects. Specifically, the recycled aggregate can be used as a raw material of lightweight concrete aggregate and wall plates; or can replace natural stone with the same grain diameter to be used as a water guide material of roof gardens; when the colorful pigment is added for coating, the coating can be used as a covering material for landscaping surfaces, can replace light ceramsite, and can adjust the color of stones.

Detailed Description

A method for producing recycled aggregate by using sorted decoration garbage as raw materials comprises the steps of wrapping a layer of prepared cement paste on the surface of aggregate with the particle sizes of 5-15 mm and 15-30 mm after crushing treatment, and forming light recycled aggregate after full maintenance. The method comprises the following specific steps:

1. the method comprises the following steps of (1) taking a decoration garbage sorting object as a raw material, and soaking aggregates with particle sizes of 5-15 mm and 15-30 mm after crushing treatment in water to enable the aggregates to fully absorb water;

2. stirring and mixing R-type ordinary portland cement and dry fly ash in a weight ratio of 1: 1-2 to obtain powder;

3. the aggregate soaked by water and the prepared powder are continuously put into a rotating granulator according to the weight ratio of 1: 0.1-0.15, the surface of the aggregate can stick and absorb the prepared powder due to the moisture content to form an adhesive layer, and the strength of the adhesive layer is enhanced in the rotating process of the granulator, so that the granulator is not easy to separate from . After the aggregates are wrapped by the cement paste by the granulator, the aggregates are automatically discharged out of the granulator and enter a vibrating screening machine to screen out redundant powder materials; the powder material under the screen is returned to the ball forming mill, and the aggregate on the screen enters the next vibrating conveying maintenance machine.

In the steps, as the cement slurry wrapped by the aggregate is limited by the technical index of cement condensation time, the surface of the prepared material has certain viscosity, and the materials are mutually bonded and difficult to separate if direct stacking maintenance is carried out at the moment, therefore, the technical mode of vibration conveying maintenance is adopted, the vibration conveying mode is selected, the conveying trough body is of a steel structure, and the top and two sides of the trough body can be subjected to heat preservation and heating (steam heating); the materials are primarily cured and lose viscosity in the vibration conveying process, and then enter a finished product curing room for static curing, so that the cement paste wrapped by the materials is finally cured.

The main equipment is as follows:

the main technical indexes are as follows: water absorption Rate (% Unit)

As shown in the table, the sorted decoration garbage (aggregates with the particle sizes of 5-15 mm and 15-30 mm, corresponding to the aggregates I and II) treated by the invention are uniformly coated with a layer of cement slurry, so that various performances are improved, particularly the water absorption index is improved, and the consistency of the water absorption is reflected. Can be used as a substitute for materials in multiple fields and aspects. Specifically, the recycled aggregate can be used as a raw material of lightweight concrete aggregate and wall plates; or can replace natural stone with the same grain diameter to be used as a water guide material of roof gardens; when the colorful pigment is added for coating, the coating can be used as a covering material for landscaping surfaces, can replace light ceramsite, and can adjust the color of stones.