CN115073074A - Environment-friendly solid waste recycled concrete and preparation method thereof - Google Patents

Environment-friendly solid waste recycled concrete and preparation method thereof Download PDF

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Publication number
CN115073074A
CN115073074A CN202211015345.5A CN202211015345A CN115073074A CN 115073074 A CN115073074 A CN 115073074A CN 202211015345 A CN202211015345 A CN 202211015345A CN 115073074 A CN115073074 A CN 115073074A
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China
Prior art keywords
parts
recycled concrete
environment
solid waste
sand
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Pending
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CN202211015345.5A
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Chinese (zh)
Inventor
马晶艳
李公民
李岩
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Pingquan Rock Building Materials Co ltd
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Pingquan Rock Building Materials Co ltd
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Priority to CN202211015345.5A priority Critical patent/CN115073074A/en
Publication of CN115073074A publication Critical patent/CN115073074A/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/023—Fired or melted materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • C04B18/142—Steelmaking slags, converter slags
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/005—Halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/38—Polysaccharides or derivatives thereof
    • C04B24/383—Cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to the technical field of environment-friendly building materials, and provides environment-friendly solid waste recycled concrete and a preparation method thereof, wherein the environment-friendly solid waste recycled concrete comprises the following components in parts by weight: 30-35 parts of cement, 10-16 parts of water, 145 parts of recycled aggregate 120-wall sand-broken sand, 8-10 parts of steel slag, 12-20 parts of fly ash, 120 parts of sand 110-wall sand-broken sand, 55-59 parts of stone, 20-25 parts of ceramic powder, 0.02-0.06 part of air entraining agent, 0.2-0.5 part of water reducing agent, 0.24-0.6 part of 2-fluoro-4-hydroxybenzoic acid and 0.12-0.3 part of cellulose hydrogen phthalate. Through above-mentioned technical scheme, the problem that recycled concrete slump loss is big, compressive strength and rupture strength are low over time among the prior art has been solved.

Description

Environment-friendly solid waste recycled concrete and preparation method thereof
Technical Field
The invention relates to the technical field of environment-friendly building materials, in particular to environment-friendly solid waste recycled concrete and a preparation method thereof.
Background
Along with the Chinese urbanization constructionIn the rapid development stage, the building industry is rapidly developed, the consumption of building materials in China is increased day by day, and the building energy consumption and garbage are increased continuously. The consumption of concrete as the most important building material in China is greatly increased all the time. The main raw materials of the concrete are cement and sand. The huge consumption of concrete in China causes mass production of cement and over exploitation of sandstone, and during the production process of cement, a large amount of energy is consumed and a large amount of harmful gas (CO) is discharged 2 、SO 2 Etc.), while the uncontrolled development and use of sandstone resources are wasted, it causes a series of environmental problems such as increasingly deficient resources and landslide. The problems of occupation of limited natural resources and damage to the ecological environment due to mass production and use of concrete are not optimistic, and the problem of accumulation of waste concrete is also becoming more severe.
Therefore, the waste concrete is added into cement, sand, stone and the like to prepare the recycled concrete, so that the accumulation of the waste concrete and the over-exploitation of the sand can be reduced. However, the recycled concrete has relatively high voids and high water absorption, and this causes problems of high slump loss and low strength of the recycled concrete with time.
Disclosure of Invention
The invention provides environment-friendly solid waste recycled concrete and a preparation method thereof, and solves the problems of great slump loss and low compressive strength and flexural strength of recycled concrete in the prior art.
The technical scheme of the invention is as follows:
the environment-friendly solid waste recycled concrete comprises the following components in parts by weight: 30-35 parts of cement, 10-16 parts of water, 145 parts of recycled aggregate 120-wall sand-broken sand, 8-10 parts of steel slag, 12-20 parts of fly ash, 120 parts of sand 110-wall sand-broken sand, 55-59 parts of stone, 20-25 parts of ceramic powder, 0.02-0.06 part of air entraining agent, 0.2-0.5 part of water reducing agent, 0.24-0.6 part of 2-fluoro-4-hydroxybenzoic acid and 0.12-0.3 part of cellulose hydrogen phthalate.
As a further technical scheme, the particle size of the recycled aggregate is 5-12 mm.
As a further technical scheme, the grain diameter of the ceramic powder is 10-50 μm.
As a further technical scheme, the air entraining agent is tea saponin powder.
As a further technical scheme, the mass ratio of the 2-fluoro-4-hydroxybenzoic acid to the cellulose hydrogen phthalate is 2: 1.
As a further technical scheme, the mass ratio of the steel slag to the fly ash is 2: 3.
As a further technical scheme, the water reducing agent is a polycarboxylic acid water reducing agent.
The invention also provides a preparation method of the environment-friendly solid waste recycled concrete, which comprises the following steps:
s1, adding ceramic powder into one fourth of the water, uniformly stirring, adding recycled aggregate, and stirring again to obtain a mixture;
and S2, adding the rest components into the mixture, uniformly stirring, and pouring and maintaining to obtain the recycled concrete.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, the ceramic powder and the recycled aggregate are mixed firstly, so that the fluidity of the recycled aggregate can be improved, the ceramic powder particles can play a role in filling the recycled aggregate, more free water can be released while doping, and the slump, compressive strength and flexural strength of recycled concrete are improved.
2. The steel slag and the fly ash are added in proportion, the steel slag contains more free calcium oxide, the free calcium oxide generates calcium hydroxide in the hydration process, the hydration of the fly ash can be promoted, hydration products such as calcium silicate and calcium aluminate are generated, and SiO in the fly ash 2 And Al 2 O 3 The composite material is relatively more, can promote the hydration of the steel slag, reduce the expansion problem caused by slow hydration in the later period, and improve the safety and the slump, the compressive strength and the breaking strength of the recycled concrete.
3. The addition of the 2-fluoro-4-hydroxybenzoic acid and the cellulose hydrogen phthalate in the invention can improve the fluidity and cohesiveness of the recycled concrete, thereby improving the comprehensive performance of the recycled concrete.
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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
Example 1
The preparation method of the environment-friendly solid waste recycled concrete comprises the following steps:
s1, weighing the components of the recycled concrete according to the weight parts in the table 1 for later use;
s2, adding ceramic powder into one fourth of the water, uniformly stirring, adding the recycled aggregate, and stirring again to obtain a mixture;
s3, adding cement, steel slag, fly ash, sand, stones, tea saponin powder, a polycarboxylic acid water reducing agent, 2-fluoro-4-hydroxybenzoic acid, cellulose hydrogen phthalate and the rest water into the mixture, uniformly stirring, and pouring and maintaining to obtain the recycled concrete.
Wherein the particle size of the recycled aggregate is 5-8mm, and the particle size of the ceramic powder is 10-30 mu m.
Example 2
The preparation method of the environment-friendly solid waste recycled concrete comprises the following steps:
s1, weighing the components of the recycled concrete according to the weight parts in the table 1 for later use;
s2, adding ceramic powder into one fourth of the water, uniformly stirring, adding recycled aggregate, and stirring again to obtain a mixture;
s3, adding cement, steel slag, fly ash, sand, stones, tea saponin powder, a polycarboxylic acid water reducing agent, 2-fluoro-4-hydroxybenzoic acid, cellulose hydrogen phthalate and the rest water into the mixture, uniformly stirring, and pouring and maintaining to obtain the recycled concrete.
Wherein the particle size of the recycled aggregate is 6-10mm, and the particle size of the ceramic powder is 20-30 mu m.
Example 3
The preparation method of the environment-friendly solid waste recycled concrete comprises the following steps:
s1, weighing the components of the recycled concrete according to the weight parts in the table 1 for later use;
s2, adding ceramic powder into one fourth of the water, uniformly stirring, adding recycled aggregate, and stirring again to obtain a mixture;
s3, adding cement, steel slag, fly ash, sand, stones, tea saponin powder, a polycarboxylic acid water reducing agent, 2-fluoro-4-hydroxybenzoic acid, cellulose hydrogen phthalate and the rest water into the mixture, uniformly stirring, and pouring and maintaining to obtain the recycled concrete.
Wherein the particle size of the recycled aggregate is 10-12mm, and the particle size of the ceramic powder is 40-50 μm.
Example 4
Compared with the example 1, the weight parts of the components in the example 4 are weighed according to the table 1, and the rest is the same as the example 1.
Example 5
Compared with the example 1, the weight parts of the components in the example 5 are weighed according to the table 1, and the rest is the same as the example 1.
Comparative example 1
In comparison with example 3, comparative example 1 was conducted without adding 2-fluoro-4-hydroxybenzoic acid and cellulose hydrogen phthalate, and the other examples were conducted in the same manner as example 3.
Comparative example 2
In comparison with example 3, the components in comparative example 2 were weighed in the amounts shown in Table 1, and the rest were the same as in example 3.
Comparative example 3
Compared with example 3, the weight parts of the components in comparative example 3 are weighed according to the table 1, and the rest is the same as example 3.
Comparative example 4
The preparation method of the environment-friendly solid waste recycled concrete comprises the following steps:
the components of the recycled concrete are weighed according to the weight parts in the example 3, and the recycled concrete is obtained by pouring and maintaining after being uniformly stirred, and the rest is the same as that in the example 3.
TABLE 1 recycled concrete Components parts by weight (parts)
Figure 127087DEST_PATH_IMAGE002
Experimental example 1
The slump and strength of the recycled concrete obtained in examples 1 to 5 and comparative examples 1 to 4 were measured.
Determining the slump of the recycled concrete according to GB/T50080-2016 standard of test method for the performance of common concrete mixtures;
the compressive strength of the recycled concrete is measured according to GB/T50081-2019 standard of mechanical property test method of common concrete;
and (3) determining the breaking strength of the recycled concrete according to GB/T50081-2019 'test method standard for physical and mechanical properties of concrete'.
TABLE 2 slump and strength of recycled concrete obtained in examples 1 to 5 and comparative examples 1 to 4
Figure 231178DEST_PATH_IMAGE004
In comparison with example 3, comparative example 1 was prepared without adding 2-fluoro-4-hydroxybenzoic acid and cellulose hydrogen phthalate, comparative example 2 was prepared with 1:1 of 2-fluoro-4-hydroxybenzoic acid and cellulose hydrogen phthalate, and comparative example 3 was prepared with 3:2 of steel slag and fly ash, and it can be seen from Table 2 that the slump, compressive strength, and flexural strength of the recycled concrete prepared in comparative examples 1-4 were lower than those of examples 1-5. Compared with the example 3, the comparative example 4 directly and uniformly mixes all the components of the recycled concrete, and the comprehensive performance of the obtained recycled concrete is lower than that of the example 3, which shows that the comprehensive performance of the recycled concrete can be improved by mixing the ceramic powder and the recycled aggregate.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The environment-friendly solid waste recycled concrete is characterized by comprising the following components in parts by weight: 30-35 parts of cement, 10-16 parts of water, 145 parts of recycled aggregate 120-wall sand-broken sand, 8-10 parts of steel slag, 12-20 parts of fly ash, 120 parts of sand 110-wall sand-broken sand, 55-59 parts of stone, 20-25 parts of ceramic powder, 0.02-0.06 part of air entraining agent, 0.2-0.5 part of water reducing agent, 0.24-0.6 part of 2-fluoro-4-hydroxybenzoic acid and 0.12-0.3 part of cellulose hydrogen phthalate.
2. The environment-friendly solid waste recycled concrete according to claim 1, wherein the recycled aggregate has a particle size of 5-12 mm.
3. The environment-friendly solid waste recycled concrete according to claim 1, wherein the ceramic powder has a particle size of 10-50 μm.
4. The environment-friendly solid waste recycled concrete according to claim 1, wherein the air-entraining agent is tea saponin powder.
5. The environment-friendly solid waste recycled concrete according to claim 1, wherein the mass ratio of the 2-fluoro-4-hydroxybenzoic acid to the cellulose hydrogen phthalate is 2: 1.
6. The environment-friendly solid waste recycled concrete according to claim 1, wherein the mass ratio of the steel slag to the fly ash is 2: 3.
7. The environment-friendly solid waste recycled concrete of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
8. The preparation method of the environment-friendly solid waste recycled concrete according to claim 1, which is characterized by comprising the following steps:
s1, adding ceramic powder into one fourth of the water, uniformly stirring, adding recycled aggregate, and stirring again to obtain a mixture;
and S2, adding the rest components into the mixture, uniformly stirring, and pouring and maintaining to obtain the recycled concrete.
CN202211015345.5A 2022-08-24 2022-08-24 Environment-friendly solid waste recycled concrete and preparation method thereof Pending CN115073074A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115504743A (en) * 2022-10-20 2022-12-23 深圳市恒星建材有限公司 Environment-friendly concrete and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1428374A (en) * 2001-12-27 2003-07-09 伊斯曼柯达公司 Improved products with gap
CN101077828A (en) * 2006-05-23 2007-11-28 入江正明 Cement micro-powder and composition for prefabricated concrete using the same
CN102584127A (en) * 2012-02-28 2012-07-18 江苏大学 Regenerated aggregate type vegetation ecological concrete and preparation method thereof
CN109095865A (en) * 2018-10-29 2018-12-28 中国建材检验认证集团北京天誉有限公司 A kind of recycled high performance concrete material and preparation method thereof
CN113233825A (en) * 2021-06-03 2021-08-10 金华职业技术学院 Recycled concrete beneficial to improving impermeability and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1428374A (en) * 2001-12-27 2003-07-09 伊斯曼柯达公司 Improved products with gap
CN101077828A (en) * 2006-05-23 2007-11-28 入江正明 Cement micro-powder and composition for prefabricated concrete using the same
CN102584127A (en) * 2012-02-28 2012-07-18 江苏大学 Regenerated aggregate type vegetation ecological concrete and preparation method thereof
CN109095865A (en) * 2018-10-29 2018-12-28 中国建材检验认证集团北京天誉有限公司 A kind of recycled high performance concrete material and preparation method thereof
CN113233825A (en) * 2021-06-03 2021-08-10 金华职业技术学院 Recycled concrete beneficial to improving impermeability and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115504743A (en) * 2022-10-20 2022-12-23 深圳市恒星建材有限公司 Environment-friendly concrete and preparation method thereof

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