阅读说明：本技术 一种建筑固废再生水泥混合材 (Building solid waste recycled cement admixture ) 是由 郑道泽 于 2021-01-08 设计创作，主要内容包括：本发明涉建筑固废再生水泥及技术领域,尤其为一种建筑固废再生水泥混合材,包括以下步骤：S1,建筑固废破碎预处理；S2,破碎；S3,成分分析；S4,烘干；S5,研磨筛分；S6,加入混合,强度测定,通过建筑固废的产生数量巨大,在水泥生产中得到充分应用,将进一步实现节能降耗,即消除了废物,又降低了对环境的污染,节约了耕地,建筑垃圾做水泥混合材和其他天然的或人工的的混合材相比具有在城市边来源广,价格也有优势,性能方面较非活性混合材的石灰石、砂岩、河沙等活性高,可部分代替其他混合材；使用后可以降低水泥的成本,减少污染,具有很好的经济效益和社会效益有很好的推广价值。(The invention relates to the technical field of construction solid waste recycled cement, in particular to a construction solid waste recycled cement admixture, which comprises the following steps: s1, carrying out crushing pretreatment on the building solid waste; s2, crushing; s3, component analysis; s4, drying; s5, grinding and screening; s6, adding mixing and strength measurement, wherein the quantity of the generated construction solid wastes is huge, the construction solid wastes are fully applied to cement production, energy conservation and consumption reduction are further realized, wastes are eliminated, the pollution to the environment is reduced, cultivated land is saved, the construction wastes are used as cement mixing materials, compared with other natural or artificial mixing materials, the construction wastes have wide sources and advantages on city side, the cost is also superior, the performances are higher than those of limestone, sandstone, river sand and the like of non-active mixing materials, and other mixing materials can be partially replaced; after the cement is used, the cost of the cement can be reduced, the pollution is reduced, and the cement has good economic benefits and social benefits and has good popularization value.)

1. The building solid waste recycled cement admixture is characterized by comprising the following steps:

s1, carrying out crushing pretreatment on the building solid waste;

s2, crushing;

s3, component analysis;

s4, drying;

s5, grinding and screening;

and S6, adding and mixing, and measuring the strength.

2. The building solid waste recycled cement admixture as claimed in claim 1, wherein the S2 is crushed by a crusher, and the average particle size is 15 mm.

3. The construction solid waste regeneration of claim 1The cement admixture is characterized in that the S3 component analysis comprises the following main components: CaO: 35.62, MgO: 3.11, SiO₂27.83、Al₂O₃8.76、Fe₂O₃4.50; loss on ignition: 14.18 of; the compression strength ratio of the physical examination is as follows: 70 percent.

4. The building solid waste recycled cement admixture as claimed in claim 1, wherein the drying of S4 is to dry the building solid waste at 105-110 ℃ until the moisture content is less than 1.0%.

5. The building solid waste recycled cement admixture as claimed in claim 1, wherein the S5 grinding and sieving is to grind the crushed solid waste to a screen residue of 1.0-3.0% with 80 μm square hole sieve, and the specific surface area after grinding is 350 ± 10m²/Kg。

6. The building solid waste recycled cement admixture as claimed in claim 1, wherein said S6 is added for mixing, strength measurement: mixing the finely ground construction waste with Portland cement and a proper amount of gypsum, wherein the mixing amount of the construction waste is 30 percent, and the using amount of the gypsum is adjusted to ensure that SO is used₃Content of SO in Portland cement₃The 3d compressive strength and the 28d compressive strength of the test sample are respectively measured, for the test sample which is difficult to form, the water adding amount can be increased by 0.01 water cement ratio, and the fluidity of the cement mortar is not less than 180 mm.

Technical Field

The invention relates to the technical field of construction solid waste recycled cement, in particular to a construction solid waste recycled cement admixture.

Background

The urban construction in China is continuously and rapidly expanded, the urban reconstruction and the rapid development of the building industry are accompanied by a great amount of building demolition garbage to trap cities and towns. It is estimated that 0.7-1.3 million tons of building demolition waste will be generated for every 1 million square meters of old building demolition. A large amount of construction waste is directly transported to suburbs of cities and towns without any treatment, is stacked in the open air, occupies land, continuously pollutes soil, water sources, riverways, vegetation and the like, and the comprehensive recycling of the construction waste plays an important role in solving the problems of enclosing difficulties and environmental pollution faced by cities and towns. At present, the research on building demolition mainly focuses on the aspects of recycled aggregate, recycled concrete and the like, and the construction waste cannot be recycled in all components. In addition, a large amount of natural resources and energy are consumed in the production process of cement products, and resources and energy can be saved by consuming a large amount of solid wastes. The construction waste has more active mineral components and has the condition of being recycled as a cement active mixed material. Research and practice prove that 30 percent of waste concrete and 10 percent of solid waste of clay bricks can reach the strength grade of P.O 42.5 d respectively, and the early strength of cement can be partially and effectively improved within 20 percent of the mixing amount of the waste concrete or within 10 percent of the mixing amount of waste clay brick powder. Through the classification and activity excitation technology of the construction waste, the construction waste has better popularization and application prospects in the cement industry as a mixed material.

The proportion of the construction waste to the waste bricks and the concrete is approximately 1:1, and the cement pavement is completely made of cement concrete. Bricks and tiles in the construction waste are obtained by calcining clay at high temperature, belong to artificial volcanic ash in the cement industry and are good active mixed materials, 50% of limestone in concrete is beneficial to the early strength of cement after being added, and the limestone and the bricks and tiles are good mixed materials for adjusting the advantage complementation of the early and later strength of the cement in a coexisting state, so that the construction waste-solid regenerated cement mixed material is provided.

Disclosure of Invention

The invention aims to provide a building solid waste recycled cement admixture to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the building solid waste recycled cement admixture comprises the following steps:

s1, carrying out crushing pretreatment on the building solid waste;

s2, crushing;

s3, component analysis;

s4, drying;

s5, grinding and screening;

and S6, adding and mixing, and measuring the strength.

Preferably, the S2 is crushed by a crusher, and the average particle size is 15 mm.

Preferably, the S3 component analysis mainly comprises the following components: CaO:35.62、MgO：3.11、SiO₂27.83、Al₂O₃8.76、Fe₂O₃4.50; loss on ignition: 14.18 of; the compression strength ratio of the physical examination is as follows: 70 percent.

Preferably, the S4 drying step is to dry the construction solid waste at 105-110 ℃ until the moisture content is less than 1.0%.

Preferably, the S5 grinding and screening are carried out, the crushed solid wastes are ground until the residue of a square-hole sieve with the size of 80 mu m is 1.0-3.0%, and the specific surface area after grinding is 350 +/-10 m²/Kg。

Preferably, the S6 is added and mixed, and the strength is measured: mixing the finely ground construction waste with Portland cement and a proper amount of gypsum, wherein the mixing amount of the construction waste is 30 percent, and the using amount of the gypsum is adjusted to ensure that SO is used₃Content of SO in Portland cement₃The 3d compressive strength and the 28d compressive strength of the test sample are respectively measured, for the test sample which is difficult to form, the water adding amount can be increased by 0.01 water cement ratio, and the fluidity of the cement mortar is not less than 180 mm.

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

in the invention, the cement admixture meets the basic requirements of circular economy and sustainable development strategy which are vigorously advocated in China at present: the urban building rubbish is prevented from being stacked and buried, environmental pollution caused by treatment modes such as burying and the like is avoided, precious land resources are occupied, the urban surrounding environment is improved, air is purified, urban underground water source pollution is reduced and avoided, and no environmental burden is left: the method effectively reduces the health damage to urban residents due to environmental pollution, water pollution and air pollution, has very important environmental protection significance and environmental benefit, and therefore, the method utilizes the urban construction waste to produce high-quality ecological cement in a resource manner, not only can bring direct economic benefit to cement factories, but also solves the problem of difficult treatment of the urban construction waste at present, makes direct great contribution to the development of national energy conservation and emission reduction and circular economy, enables cement enterprises to be converted from polluted households into green industry which makes outstanding contribution to treatment, pollution solution and building of blue-sky-blue-day living families, has extremely high social benefit and economic benefit, further realizes energy conservation and consumption reduction by means of huge generation quantity of the construction solid waste, is fully applied in cement production, eliminates waste, reduces pollution to the environment and saves cultivated land, compared with other natural or artificial mixed materials, the building waste as the cement mixed material has wide sources and also has advantages of price at the side of a city, has higher activity than inactive mixed materials in performance, such as limestone, sandstone, river sand and the like, and can partially replace other mixed materials; after the cement is used, the cost of the cement can be reduced, the pollution is reduced, the cement can be used together with waste residues specified by other countries, for example, the proportion of the cement is more than 30%, tax can be avoided according to national policies, and the cement has good economic benefits and social benefits and good popularization value.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

The invention provides a technical scheme that:

the building solid waste recycled cement admixture comprises the following steps:

s1, carrying out crushing pretreatment on the building solid waste;

s2, crushing;

s3, component analysis;

s4, drying;

s5, grinding and screening;

and S6, adding and mixing, and measuring the strength.

And S2 is crushed by a crusher, and the average particle size is 15 mm.

The S3 component analysis comprises the following main components: CaO: 35.62, MgO: 3.11, SiO₂27.83、Al₂O₃8.76、Fe₂O₃4.50; loss on ignition: 14.18 of; the compression strength ratio of the physical examination is as follows: 70 percent.

And S4, drying the building solid waste at 105-110 ℃ until the moisture content is less than 1.0%.

Grinding and sieving S5, grinding the crushed solid wastes to 80 mu m square hole sieve residue of 1.0-3.0%, and grinding the solid wastes to obtain powder with the specific surface area of 350 +/-10 m²/Kg。

The S6 is added and mixed, and the strength is measured: mixing the finely ground construction waste with Portland cement and a proper amount of gypsum, wherein the mixing amount of the construction waste is 30 percent, and the using amount of the gypsum is adjusted to ensure that SO is used₃Content of SO in Portland cement₃The 3d compressive strength and the 28d compressive strength of the test sample are respectively measured, for the test sample which is difficult to form, the water adding amount can be increased by 0.01 water cement ratio, and the fluidity of the cement mortar is not less than 180 mm.

The cement admixture meets the basic requirements of circular economy and sustainable development strategy which are vigorously advocated in China at present: the urban building rubbish is prevented from being stacked and buried, environmental pollution caused by treatment modes such as burying and the like is avoided, precious land resources are occupied, the urban surrounding environment is improved, air is purified, urban underground water source pollution is reduced and avoided, and no environmental burden is left: the method effectively reduces the health damage to urban residents due to environmental pollution, water pollution and air pollution, has very important environmental protection significance and environmental benefit, and therefore, the method utilizes the urban construction waste to produce high-quality ecological cement in a resource manner, not only can bring direct economic benefit to cement factories, but also solves the problem of difficult treatment of the urban construction waste at present, makes direct great contribution to the development of national energy conservation and emission reduction and circular economy, enables cement enterprises to be converted from polluted households into green industry which makes outstanding contribution to treatment, pollution solution and building of blue-sky-blue-day living families, has extremely high social benefit and economic benefit, further realizes energy conservation and consumption reduction by means of huge generation quantity of the construction solid waste, is fully applied in cement production, eliminates waste, reduces pollution to the environment and saves cultivated land, compared with other natural or artificial mixed materials, the building waste as the cement mixed material has wide sources and also has advantages of price at the side of a city, has higher activity than inactive mixed materials in performance, such as limestone, sandstone, river sand and the like, and can partially replace other mixed materials; after the cement is used, the cost of the cement can be reduced, the pollution is reduced, the cement can be used together with waste residues specified by other countries, for example, the proportion of the cement is more than 30%, tax can be avoided according to national policies, and the cement has good economic benefits and social benefits and good popularization value.

Example (b): the construction solid waste is pretreated by crushing, then is crushed by a crusher, the average particle size is 15mm, and then the composition analysis is carried out, wherein the main components are as follows: CaO: 35.62, MgO: 3.11, SiO227.83, Al2O38.76, Fe2O34.50; loss on ignition: 14.18 of; the compression strength ratio of the physical examination is as follows: 70 percent, drying the building solid waste at 105-110 ℃ until the water content is less than 1.0 percent, grinding and sieving, grinding the crushed solid waste until the residue of a square-hole sieve with the size of 80 mu m is 1.0-3.0 percent, adding and mixing the ground solid waste with the specific surface area of 350 +/-10 m 2/Kg: the finely ground construction waste is mixed with Portland cement and a proper amount of gypsum, the mixing amount of the construction waste is 30 percent, the using amount of the gypsum is adjusted to ensure that the content of SO3 is basically the same as the content of SO3 in the Portland cement, the 3d compression strength and the 28d compression strength of a test sample are respectively measured, for a test body which is difficult to form, the water adding amount can be increased progressively according to the 0.01 water cement ratio, the fluidity of cement mortar is not less than 180mm, and the cement admixture meets the basic requirements of circular economy and sustainable development strategy which are vigorously advocated in China at present: the urban building rubbish is prevented from being stacked and buried, environmental pollution caused by treatment modes such as burying and the like is avoided, precious land resources are occupied, the urban surrounding environment is improved, air is purified, urban underground water source pollution is reduced and avoided, and no environmental burden is left: the method effectively reduces the health damage to urban residents due to environmental pollution, water pollution and air pollution, has very important environmental protection significance and environmental benefit, and therefore, the method utilizes the urban construction waste to produce high-quality ecological cement in a resource manner, not only can bring direct economic benefit to cement factories, but also solves the problem of difficult treatment of the urban construction waste at present, makes direct great contribution to the development of national energy conservation and emission reduction and circular economy, enables cement enterprises to be converted from polluted households into green industry which makes outstanding contribution to treatment, pollution solution and building of blue-sky-blue-day living families, has extremely high social benefit and economic benefit, further realizes energy conservation and consumption reduction by means of huge generation quantity of the construction solid waste, is fully applied in cement production, eliminates waste, reduces pollution to the environment and saves cultivated land, compared with other natural or artificial mixed materials, the building waste as the cement mixed material has wide sources and also has advantages of price at the side of a city, has higher activity than inactive mixed materials in performance, such as limestone, sandstone, river sand and the like, and can partially replace other mixed materials; after the cement is used, the cost of the cement can be reduced, the pollution is reduced, the cement can be used together with waste residues specified by other countries, for example, the proportion of the cement is more than 30%, tax can be avoided according to national policies, and the cement has good economic benefits and social benefits and good popularization value.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.