阅读说明：本技术 一种利用废弃混凝土制作的再生骨料及制作方法 (Recycled aggregate prepared from waste concrete and preparation method ) 是由 梁冠军 尤超 安静 张涛 李西 张瑞 林祖宏 于 2020-06-19 设计创作，主要内容包括：本发明提供了一种利用废弃混凝土制作的再生骨料,包含以下各成分的重量份的组成：5mm-15mm混凝土骨料450份-500份、15mm-30mm混凝土骨料250份-350份、TRC材料190份-278份、掺和料225份-325份、添加剂90份-150份和水120份-160份,在对废弃混凝土进行制作再生骨科的过程中,对破碎出的骨料进行筛选、除砂和清洗处理,使得骨料表面得以清洁处理,从而在建筑体在制作的过程中保证各组成成分之间的紧密性和强度,在再生骨料的再加工过程中掺入多组掺和料和添加剂,可以有效的提高制成品的整体强度,并通过内置的TRC材料可以提高再生骨料成品砌块的坚硬程度,并且所采用的材料均为废气材料,这样实现了节能减排和绿色环保的目标。(The invention provides a recycled aggregate prepared from waste concrete, which comprises the following components in parts by weight: 450-500 parts of 5mm-15mm concrete aggregate, 250-350 parts of 15mm-30mm concrete aggregate, 190-278 parts of TRC material, 225-325 parts of admixture, 90-150 parts of additive and 120-160 parts of water, in the process of manufacturing regenerative orthopedics from waste concrete, the crushed aggregate is screened, desanded and cleaned, so that the surface of the aggregate is cleaned, thereby ensuring the tightness and the strength among all the components in the manufacturing process of the building body, a plurality of groups of admixture and additive are mixed in the reprocessing process of the recycled aggregate, the integral strength of a finished product can be effectively improved, the hardness degree of a recycled aggregate finished product building block can be improved through a built-in TRC material, and the adopted materials are waste gas materials, so that the aims of energy conservation, emission reduction and environmental protection are fulfilled.)

1. The utility model provides a recycled aggregate who utilizes waste concrete preparation which characterized in that: comprises the following components in parts by weight: 450-500 parts of 5mm-15mm concrete aggregate, 250-350 parts of 15mm-30mm concrete aggregate, 190-278 parts of TRC material, 225-325 parts of admixture, 90-150 parts of additive and 120-160 parts of water.

2. The recycled aggregate made of waste concrete according to claim 1, wherein: comprises the following components in parts by weight: 475 parts of 8mm concrete aggregate, 300 parts of 23mm concrete aggregate, 245 parts of TRC material, 275 parts of admixture, 120 parts of additive and 140 parts of water.

3. The recycled aggregate made of waste concrete according to claim 1, wherein: the concrete aggregate is obtained by extracting waste concrete in a damaged way and is divided into coarse aggregate and fine aggregate.

4. The recycled aggregate made of waste concrete according to claim 1, wherein: the TRC material selects a proper amount of discontinuous short fibers or continuous long fibers as a reinforcing material and is in a net structure.

5. The recycled aggregate made of waste concrete according to claim 1, wherein: the blending material is an active mineral blending material.

6. The recycled aggregate made of waste concrete according to claim 1, wherein: the active mineral admixture adopts one or more of fly ash, granulated blast furnace slag powder, zeolite powder and silica fume.

7. The recycled aggregate made of waste concrete according to claim 1, wherein: the additive is one or the combination of more than two of a naphthalene-based high-efficiency water reducing agent, a polycarboxylic acid high-performance water reducing agent and an aliphatic high-efficiency water reducing agent.

8. The method for preparing recycled aggregate from waste concrete according to claims 1 to 7, wherein the method comprises the following steps: the manufacturing method comprises the following steps:

the method comprises the following steps: preparing waste concrete recycled aggregate: a. concrete crushing and sorting: putting the waste concrete into a crusher body for crushing treatment, arranging three layers of screens in the crusher, wherein the aperture of the screen positioned above is 30-50 mm, the aperture of the screen positioned in the middle is 15-30 mm, the aperture of the screen positioned in the lower layer is 5-15 mm, and one side of each screen is provided with a discharge port for screening regenerative orthopedics with different thicknesses; b. rolling and desanding treatment: respectively placing aggregates with different thicknesses in a rolling type screening machine for screening, and carrying out stirring cleaning treatment on the orthopedics department through an internal stirring rod, wherein the rotating speed of the stirring rod is 280-400 r/min, the stirring time is controlled within 30-50 min, the steps are repeated twice, and the sand on the surface of the orthopedics department is removed: c. regenerated orthopedics cleaning treatment: placing the screened regenerated bone in a water pool for rolling type cleaning treatment, and airing after cleaning;

step two: TRC material preparation treatment: the material of the fiber woven net is waste fiber material and is woven by a weaving machine, and the fiber woven net is woven into a net structure.

Step three: preparing enhanced recycled aggregate: sequentially putting 5mm-15mm concrete aggregate, 15mm-30mm concrete aggregate, TRC material and water into a stirrer for stirring treatment, injecting lime during stirring, carrying out primary stirring, controlling the rotating speed to be 300-450 r/min and controlling the stirring time to be 40-50 min, injecting admixture and additive into the mixture, carrying out secondary stirring, controlling the rotating speed to be 250-300 r/min and controlling the stirring time to be 20-30 min, carrying out block making treatment on the mixture by a block making machine after stirring is finished, and finally carrying out drying treatment.

Technical Field

The invention relates to the technical field of waste concrete recycling, in particular to a recycled aggregate prepared from waste concrete and a preparation method thereof.

Background

With the acceleration of urbanization, the demand of society for concrete is rapidly increasing. The coarse and fine aggregate as an important raw material of concrete is obviously insufficient, so that huge amounts of waste concrete are reasonably recycled, the problem that natural primary coarse and fine aggregate is lacked is solved, the treatment cost of the waste concrete is saved, the environmental protection is facilitated, and the effect that good social and economic benefits cannot be underestimated is achieved. The discharge amount of the building garbage is increased year by year, the proportion of renewable components is also continuously improved, but most of the building garbage is not treated at all and is transported to the suburb or the periphery of the city for simple landfill or open-air stockpiling, which wastes land and resources and pollutes the environment; in addition, with the increasing population, the demand of sandstone aggregate for the construction industry is increasing. For a long time, as the sandstone aggregate is wide and easy to obtain and low in price, the sandstone aggregate is regarded as an inexhaustible raw material and is mined randomly, so that the resource is exhausted, the mountain landslide and the riverbed diversion are caused, and the natural environment is seriously damaged. The production and utilization of the construction waste recycled aggregate have important significance for saving resources, protecting the environment and realizing the sustainable development of the construction industry.

The existing process for manufacturing the regenerative bone by using the waste concrete has the following problems: (1) when the regenerated orthopaedics is used for manufacturing a building body, the internal components are single, so that the strength of the manufactured building body cannot meet the requirement, and cracks are easy to generate in the using process; (2) the preparation and the processing mode of the recycled aggregate of discarded concrete preparation are comparatively simple, and the treatment effect on orthopedics surface is not good, leads to easily that the regenerated orthopedics is relatively poor at the in-process intensity of refabrication, influences the intensity of regenerated orthopedics building body.

Disclosure of Invention

Aiming at the defects, the invention aims to provide the recycled aggregate prepared from the waste concrete and the preparation method thereof, which can effectively improve the cleanliness of the recycled aggregate extraction and the strength of the recycled aggregate finished product by improving the processing method, and realize the aims of energy conservation, emission reduction and environmental protection.

The invention is realized by the following technical scheme:

a recycled aggregate prepared from waste concrete comprises the following components in parts by weight: 450-500 parts of 5mm-15mm concrete aggregate, 250-350 parts of 15mm-30mm concrete aggregate, 190-278 parts of TRC material, 225-325 parts of admixture, 90-150 parts of additive and 120-160 parts of water.

The improvement of the technical scheme comprises the following components in parts by weight: 475 parts of 8mm concrete aggregate, 300 parts of 23mm concrete aggregate, 245 parts of TRC material, 275 parts of admixture, 120 parts of additive and 140 parts of water.

As an improvement of the technical scheme, the concrete aggregate is obtained by extracting waste concrete damage and is divided into coarse aggregate and fine aggregate.

As an improvement of the technical scheme, the TRC material selects proper discontinuous short fibers or continuous long fibers as a reinforcing material and is in a net structure

As an improvement of the technical scheme, the admixture is an active mineral admixture.

As an improvement of the technical scheme, the active mineral admixture adopts one or more of fly ash, granulated blast furnace slag powder, zeolite powder and silica fume.

As an improvement of the technical scheme, the additive is one or a combination of more than two of a naphthalene-based high-efficiency water reducing agent, a polycarboxylic acid high-performance water reducing agent and an aliphatic high-efficiency water reducing agent.

The manufacturing method comprises the following steps:

the method comprises the following steps: preparing waste concrete recycled aggregate: a. concrete crushing and sorting: putting the waste concrete into a crusher body for crushing treatment, arranging three layers of screens in the crusher, wherein the aperture of the screen positioned above is 30-50 mm, the aperture of the screen positioned in the middle is 15-30 mm, the aperture of the screen positioned in the lower layer is 5-15 mm, and one side of each screen is provided with a discharge port for screening regenerative orthopedics with different thicknesses; b. rolling and desanding treatment: respectively placing aggregates with different thicknesses in a rolling type screening machine for screening, and carrying out stirring cleaning treatment on the orthopedics department through an internal stirring rod, wherein the rotating speed of the stirring rod is 280-400 r/min, the stirring time is controlled within 30-50 min, the steps are repeated twice, and the sand on the surface of the orthopedics department is removed: c. regenerated orthopedics cleaning treatment: placing the screened regenerated bone in a water pool for rolling type cleaning treatment, and airing after cleaning;

step two: TRC material preparation treatment: the material of the fiber woven net is waste fiber material and is woven by a weaving machine, and the fiber woven net is woven into a net structure.

Step three: preparing enhanced recycled aggregate: sequentially putting 5mm-15mm concrete aggregate, 15mm-30mm concrete aggregate, TRC material and water into a stirrer for stirring treatment, injecting lime during stirring, carrying out primary stirring, controlling the rotating speed to be 300-450 r/min and controlling the stirring time to be 40-50 min, injecting admixture and additive into the mixture, carrying out secondary stirring, controlling the rotating speed to be 250-300 r/min and controlling the stirring time to be 20-30 min, carrying out block making treatment on the mixture by a block making machine after stirring is finished, and finally carrying out drying treatment.

The invention has the beneficial effects that:

(1) in the process of manufacturing the recycled aggregate from the waste concrete, the crushed aggregate is screened, desanded and cleaned, so that the surface of the aggregate is cleaned, and the tightness and strength of the components are ensured in the process of manufacturing the building body.

(2) A plurality of groups of admixtures and additives are mixed in the reprocessing process of the recycled aggregate, so that the overall strength of a finished product can be effectively improved, the hardness degree of a recycled aggregate finished product building block can be improved through a built-in TRC material, and the adopted materials are waste gas materials, so that the aims of energy conservation, emission reduction and environmental protection are fulfilled.

Detailed Description