阅读说明：本技术 一种废旧岩棉成球应用于混凝土的方法 (Method for applying waste rock wool balls to concrete ) 是由 陈维英 张学雷 崔东波 孙晓光 孙培旺 张余鑫 蒋希民 穆广杰 李平 王欢 闫敏 于 2020-10-29 设计创作，主要内容包括：本发明属于固废资源化利用技术领域和建筑材料应用领域,具体涉及一种废旧岩棉成球应用于混凝土的方法,该方法首先对废旧岩棉进行磨细处理,比表面积达到350-550m~2/kg；其次,利用胶凝材料或者黏土与磨细的废旧岩棉机械混合均匀,圆盘成球,经过适当养护和自然晾干后,制备成轻骨料；再次,按照混凝土的配合比设计规范,将一定比例的小球代替部分轻骨料掺加到混凝土原料中,配制成不同综合性能的混凝土。采用本方法可以最大程度处置废旧岩棉,实现25-100公斤/方的处置量,同时实现不同综合性能的混凝土的生产。(The invention belongs to the technical field of solid waste resource utilization and the application field of building materials, and particularly relates to a method for applying waste rock wool to concrete in a balling mode 2 Per kg; secondly, mechanically and uniformly mixing the waste rock wool which is ground by using a cementing material or clay, balling by using a disc, and preparing the light aggregate after proper maintenance and natural drying; thirdly, according to the design specification of the mixing proportion of the concrete, the balls with a certain proportion replace part of the lightweight aggregate to be added into the concrete raw materials to prepare the concrete with different comprehensive properties. By adopting the method, the waste rock wool can be treated to the maximum extent, the treatment amount of 25-100 kg/square can be realized, and the production of concrete with different comprehensive properties can be realized.)

1. A method for applying waste rock wool balls to concrete is characterized in that waste rock wool is ground in a sample preparation grinder to form balls with the specific surface area of 350-550m²And (2) preparing the fine powder/kg, preparing the fine powder and a cementing material or clay into small balls, maintaining, naturally airing, and applying the aired small balls as a lightweight aggregate to concrete.

2. The method for applying waste rock wool balls to concrete according to claim 1, wherein the cementing material is one of a pure inorganic cementing material and an organic-inorganic compound cementing material.

3. The method for applying waste rock wool balls to concrete according to claim 2, wherein the mass ratio of the organic gel material to the inorganic gel material in the organic-inorganic compound gel material is 1:4-2: 3.

4. The method for applying waste rock wool balls to concrete according to claim 2 or 3, wherein the organic cementing material is one or a mixture of more of epoxy resin adhesive, polyurethane adhesive and phenolic resin adhesive in any proportion; the inorganic cementing material is one or two of cement and water glass which are mixed in any proportion.

5. The method for applying the waste rock wool balls to the concrete as claimed in claim 2, wherein the mass percentage of the waste rock wool is 10-30% in the process of preparing the pellets A from the organic-inorganic compound cementing material and the waste rock wool.

6. The method for applying waste rock wool balls to concrete according to claim 5, wherein the balls A can be used as lightweight aggregate in high-performance concrete, and comprise the following components in parts by mass per cubic concrete: 250-400 parts of small ball A, 450 parts of P.O 52.5 cement, 150 parts of mineral powder, 25-30 parts of silica fume and 700 parts of river sand.

7. The method for applying waste rock wool balls to concrete according to claim 2, wherein the mass percentage of the waste rock wool is 10% -20% in the process of preparing the pellets B from the inorganic cementing material and the waste rock wool.

8. The method for applying waste rock wool balls to concrete according to claim 7, wherein the balls B can be used as lightweight aggregate in common concrete, and comprise the following components in parts by weight per cubic concrete: 350-500 parts of small ball B, 350 parts of P.O 42.5 cement, 150 parts of mineral powder, 30-50 parts of fly ash and 800 parts of machine-made sand.

9. The method for applying waste rock wool balls to concrete according to claim 2, wherein the mass percentage of the waste rock wool is 10% -20% in the process of preparing the pellets C from clay and the waste rock wool.

10. The method for applying waste rock wool balls to concrete as claimed in claim 9, wherein the small balls C can be used as lightweight aggregate in light Lc5-Lc10 concrete or ordinary cushion concrete, and the method comprises the following components in parts by mass per cubic concrete: 350-500 parts of small ball C, 200 parts of P.O 42.5 cement, 60-100 parts of mineral powder, 150 parts of fly ash and 1000 parts of machine-made sand.

Technical Field

The invention belongs to the technical field of solid waste resource utilization and the application field of building materials, and particularly relates to a method for applying waste rock wool balls to concrete.

Background

Along with the continuous development of rock wool industry, the rock wool waste material is more and more, and rock wool is as insulation material, and the quantity is big, abandons promptly after once only generally, if can't carry out effective processing, will certainly produce negative effects to the environment. Rockwool waste is made up of two parts, one resulting from the process of building demolition and the other from the process of building construction.

The waste rock wool is difficult to degrade, pollutes the environment and has the harm of causing cancer to people. At present most rock wool waste material is all dumped and is buried, and this part waste residue waste material quantity is few then thousands tons many then tens of thousands tons every year, dumps and buries not only extravagant manpower, power of transportation, faces very big environmental protection pressure moreover. How to find a reasonable recycling mode for rock wool waste materials and ensure the healthy and durable development of the rock wool industry is a problem to be urgently solved by the industry at present.

At present, many researchers are studying the comprehensive utilization technology of waste rock wool, for example, waste rock wool is used as a mineral admixture to improve the comprehensive performance of a cement-based cementing material, but the addition amount of waste rock wool fiber is small and only accounts for 2% (by volume). The waste rock wool is modified and applied to sewage treatment, although the treatment effect is good, new solid waste is finally generated, and the problem is not solved fundamentally.

Disclosure of Invention

Aiming at the technical problems existing at present, the invention provides a method for applying waste rock wool balls to concrete, the method can maximally utilize the waste rock wool comprehensively, and the waste rock wool balls are applied to the concrete, so that secondary pollution is avoided, and the problem that the waste rock wool is difficult to treat is fundamentally solved.

The technical scheme of the invention is as follows:

a method for applying waste rock wool balls to concrete comprises grinding waste rock wool into 550m powder with a specific surface area of 350-²And (2) preparing the fine powder/kg, preparing the fine powder and a cementing material or clay into small balls, maintaining, naturally airing, and applying the aired small balls as a lightweight aggregate to concrete.

Preferably, the cementing material is one of a pure inorganic cementing material and an organic-inorganic compound cementing material; further preferably, the weight ratio of the organic gel material to the inorganic gel material in the organic-inorganic compound gel material is 1:4-2: 3.

The waste rock wool and the organic-inorganic compound cementing material are mixed to prepare a small ball, and the small ball is marked as a small ball A; the waste rock wool and the inorganic cementing material are mixed to prepare a small ball, which is marked as a small ball B; the small ball made by mixing the waste rock wool and the clay is marked as small ball C.

Preferably, the organic cementing material is one or a mixture of more of epoxy resin adhesive, polyurethane adhesive and phenolic resin adhesive in any proportion; the inorganic cementing material is one or two of cement and water glass which are mixed in any proportion.

Preferably, in the process of preparing the pellets A from the organic-inorganic compound cementing material and the waste rock wool, the mass percent of the waste rock wool is 10-30%. The water absorption of the small ball A is 8 percent15% by volume weight of 400-600kg/m³The strength is 10-15MPa according to the detection of the cylinder pressure strength of the lightweight aggregate.

Further preferably, the pellets A can be used as lightweight aggregate in high-performance concrete (Lc60-Lc80), and comprise the following components in parts by mass per cubic concrete: 250-400 parts of small ball A, 450 parts of P.O 52.5 cement, 150 parts of mineral powder, 25-30 parts of silica fume and 700 parts of river sand; the compressive strength of the concrete is 60-80MPa, and the volume weight is 1850kg/m³。

Preferably, in the process of preparing the pellets B from the inorganic cementing material and the waste rock wool, the mass percent of the waste rock wool is 10-20%. The water absorption of the small ball B is 15-25 percent, and the volume weight is 800kg/m³The strength is 6-10MPa according to the detection of the cylinder pressure strength of the lightweight aggregate.

Further preferably, the pellets B can be used as lightweight aggregate in ordinary concrete (Lc25-Lc55), comprising, in parts by weight (kg) per cubic concrete: 350-500 parts of small ball B, 350 parts of P.O 42.5 cement, 150 parts of mineral powder, 30-50 parts of fly ash and 800 parts of machine-made sand; the compressive strength of the concrete is 30-50MPa, and the volume weight is 1850-³。

Preferably, in the process of preparing the pellets C from the clay and the waste rock wool, the mass percent of the waste rock wool is 10-20%. The water absorption rate is 25-35 percent, and the volume weight is 800kg/m³The strength is 0.5-2MPa according to the detection of the cylinder pressure strength of the lightweight aggregate.

Further preferably, the small ball C can be used as lightweight aggregate in lightweight concrete (Lc5-Lc10) or common cushion concrete, and comprises the following components in parts by weight (kg) per cubic concrete: 350-500 parts of small ball C, 200 parts of P.O 42.5 cement, 60-100 parts of mineral powder, 150 parts of fly ash, 1000 parts of machine-made sand, 5-20MPa of compressive strength of concrete and 1850-2000kg/m of volume weight³。

The invention consumes the solid waste rock wool which is difficult to dispose, and improves the utilization amount of the solid waste rock wool. The waste rock wool is made into the pellets, three disposal modes are adopted, the rock wool amount consumed by each mode is different, and the pellets with different strength and water absorption are obtained; the high-strength concrete has high requirements on the strength, the grain diameter and the mixing proportion of the pellets, so the pellet A consolidated by the organic-inorganic compound cementing material can be used in the high-strength concrete; the lightweight aggregate concrete has low requirements on the strength and the water absorption of the pellets, and the pellets C solidified by the clay can be used in the lightweight aggregate concrete; the strength of the common concrete is close to the middle of the former two types, so the inorganic cementing material and the solidified small balls B can be used in the common concrete.

The existing waste rock wool is troublesome to treat, most of the waste rock wool is discarded or stacked, the rock wool is large in size and light in weight, the occupied area is large, the long-term stacking can pollute the environment, the waste rock wool is made into rock wool fibers or rock wool powder to be added into a formula of concrete, the adding amount of the rock wool is small, and the peaceability of the rock wool in mortar is poor, so that the rock wool is easy to float on the surface. According to the invention, waste rock wool and gel material or clay are made into pellets and then are applied to concrete instead of a part of coarse aggregate, so that the mixing amount of the rock wool can be increased on one hand, and the workability of the rock wool in the concrete can be improved on the other hand. The invention provides a new method for treating rock wool solid waste. By adopting the method, the waste rock wool can be treated to the maximum extent, 25-100 kg of waste rock wool can be comprehensively treated by each concrete, and the treatment capacity of the waste rock wool is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following percentages are by mass.

Example 1:

a method for applying waste rock wool balls to concrete comprises the following steps:

(1) grinding waste rock wool into powder with specific surface area of 450m by using sample preparation grinder²Fine powder/kg;

(2) uniformly mixing 32 parts of phenolic resin, 48 parts of cement and 20 parts of waste rock wool fine powder to form a small ball A, then performing water culture for 7 days, and naturally drying;

(3) the water absorption, volume weight and strength of the obtained pellets were measured, and the results were as follows:

name (R)	Water absorption (%)	Volume weight (kg/m)3)	Strength (MPa)
				Numerical value	10	500	13.8

(4) The high-performance concrete is prepared by uniformly mixing 300 parts of the small ball A, 400 parts of P.O 52.5 cement, 100 parts of mineral powder, 25 parts of silica fume and 680 parts of river sand. The compressive strength of the concrete is 65MPa, and the volume weight is 1615kg/m³The treatment amount of rock wool is 60kg/m³。

Example 2:

a method for applying waste rock wool balls to concrete comprises the following steps:

(1) grinding waste rock wool into powder with specific surface area of 450m by using sample preparation grinder²Fine powder/kg;

(2) mixing 80 parts of cement and 20 parts of waste rock wool fine powder uniformly to form balls, then carrying out water culture for 7 days, and naturally drying;

(3) the water absorption, volume weight and strength of the obtained pellets were measured, and the results were as follows:

name (R)	Water absorption (%)	Volume weight (kg/m)3)	Strength (MPa)
				Numerical value	18	600	9.5

(4) The common concrete is prepared by uniformly mixing 400 parts of small ball B, 350 parts of P.O 42.5 cement, 100 parts of mineral powder, 50 parts of fly ash and 800 parts of machine-made sand. The concrete has a compressive strength of 50MPa and a volume weight of 1850kg/m³The treatment amount of rock wool is 80kg/m³。

Example 3:

a method for applying waste rock wool balls to concrete comprises the following steps:

(1) grinding waste rock wool into powder with specific surface area of 450m by using sample preparation grinder²Fine powder/kg;

(2) uniformly mixing 80 parts of clay and 20 parts of waste rock wool fine powder to form balls, and then naturally drying the balls;

(3) the water absorption, volume weight and strength of the obtained pellets were measured, and the results were as follows:

(4) the lightweight concrete is prepared by uniformly mixing 400 parts of small ball C, 100 parts of P.O 42.5 cement, 60 parts of mineral powder, 150 parts of fly ash and 1000 parts of machine-made sand. The concrete has a compressive strength of 10MPa and a volume weight of 1900kg/m³The treatment amount of rock wool is 80kg/m³。

According to the invention, waste rock wool and gel material or clay are made into pellets and then are applied to concrete instead of a part of coarse aggregate, so that the mixing amount of the rock wool can be increased on one hand, and the workability of the rock wool in the concrete can be improved on the other hand. The invention provides a new method for treating rock wool solid waste. By adopting the method, the waste rock wool can be treated to the maximum extent, 25-100 kg of waste rock wool can be comprehensively treated by each concrete, and the treatment capacity of the waste rock wool is improved.