CN111574152A - CMA concrete with strength grade of C25 for masonry structure and preparation method thereof - Google Patents
CMA concrete with strength grade of C25 for masonry structure and preparation method thereof Download PDFInfo
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- CN111574152A CN111574152A CN202010421765.8A CN202010421765A CN111574152A CN 111574152 A CN111574152 A CN 111574152A CN 202010421765 A CN202010421765 A CN 202010421765A CN 111574152 A CN111574152 A CN 111574152A
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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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
A CMA concrete with strength grade of C25 for masonry structure is prepared from CMA, cement, powdered coal ash, coarse sand, fine sand, broken stone, water and water-reducing agent in the proportion of kg/m3): CMA: cement: fly ash: coarse sand: fine sand: crushing stone: water: the water reducing agent is: 11.75: 223.25: 95: 432: 432: 1015: 165: 5.8; pouring cement, fly ash, coarse sand, fine sand and broken stone which are weighed according to the proportion into a stirrer for stirring, adding water with a solid water reducing agent melted into the stirred materials in the stirrer for stirring, and discharging to obtain the prepared concrete mixture; preparing the concrete mixture into a test block, and performing mechanical test on the test block, wherein the 28-day compressive strength value of the test block is 25.37 MPa; the invention has the advantages of ecological environmental protection, low production cost, heat preservation, heat insulation and high firmness, and has great application value.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to CMA concrete with a masonry structure strength grade of C25 and a preparation method thereof.
Background
In recent years, with global energy crisis and environmental issues becoming more prominent, the industry generating electricity and heat by combustion of biomass is rapidly developing. Biomass is combusted to generate heat or is subjected to thermochemical conversion technology to obtain various energy products in gas, liquid and solid states, and the residual substances of the energy products are biomass ash. A large amount of biomass ash is produced in various countries of the world each year. It is estimated that the worldwide production of biomass ash is already close to the production of fly ash annually, and how to treat and utilize the biomass ash is a problem to be solved at present. A great deal of research is currently carried out to show that biomass ash can be used in the production of building materials, in particular for the production of cement and concrete, which provides great potential for the engineering application of biomass ash.
Cow dung Ash (bottle Manure Ash) is called CMA for short, and is biomass Ash generated after cow dung is combusted or incinerated. The preliminary research result shows that the CMA has the activity property of volcanic ash, can be used as a substitute for cement and fly ash and is used in concrete production. In remote Tibetan areas and pasturing areas in the west and north of China, the dried cow dung is used as fuel and is a necessity for human life, and CMA generated after the cow dung is combusted is generally discarded and dumped according to garbage. The cow dung treatment of large-scale cow farms at home and abroad has two channels: firstly, directly dumping and burying the garbage according to the garbage wastes, and partially using the garbage as organic fertilizers; and secondly, incineration power generation. Incineration of cow dung generates fuel gas and releases heat, and simultaneously, CMA accounting for about 1/3 of dry cow dung weight is left. If a large amount of cow dung and CMA are not properly treated, the environment is polluted, the soil is damaged, farmlands are occupied, and the local ecological environment is damaged.
Disclosure of Invention
The invention aims to provide the CMA concrete with the strength grade of C25 for the masonry structure and the preparation method thereof, which can realize the waste utilization of cow dung and CMA, and the product is applied to the field of buildings through reasonable proportion and process, has the advantages of ecological environmental protection, low production cost, high heat preservation, heat insulation and firmness, and has great application value.
In order to achieve the purpose, the invention adopts the technical scheme that:
a CMA concrete with strength grade of C25 for masonry structure is prepared from CMA, cement, powdered coal ash, coarse sand, fine sand, broken stone, water and water-reducing agent in the proportion of kg/m3): CMA: cement: fly ash: coarse sand: fine sand: crushing stone: water: the water reducing agent is: 11.75: 223.25: 95: 432: 432: 1015: 165: 5.8.
a preparation method of CMA concrete with a masonry structure strength grade of C25 comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 70-90 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 3-5min, and discharging to obtain the prepared concrete mixture.
The cement is 42.5R ordinary portland cement.
The cow dung comes from Shaanxi province salted-yang breeding dairy farms, and the cow dung is dried in the sun and burnt to obtain CMA.
The fly ash adopts III-grade separation fly ash.
The sand adopts Chinese ISO standard sand and natural sand, wherein the fineness modulus of the natural sand is 2.39, the sand in the area II has the apparent density of 2.60g/cm3。
The crushed stone is basalt, and the diameter of the crushed stone is between 10mm and 30 mm.
The water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is 30%.
The invention has the beneficial effects that:
1. the CMA replaces part of cement to be used for manufacturing the concrete, so that the production cost of the concrete is reduced, the waste CMA pollutes the environment, the recycling of the waste CMA not only solves the environmental problem, but also realizes the recycling of waste, and saves natural resources.
2. The early-stage research finds that the micro-morphology of the CMA is flocculent, the flocculent form is more beneficial to heat preservation and heat insulation, and the CMA is added into concrete to play a role in heat preservation and heat insulation so as to realize the self-heat preservation of the concrete.
In conclusion, the invention has the advantages of ecological environmental protection, low production cost, heat preservation, heat insulation and high firmness, and has great application value.
Detailed Description
The present invention is further illustrated by the following specific examples.
A CMA concrete with strength grade of C25 for masonry structure is prepared from CMA, cement, powdered coal ash, coarse sand, fine sand, broken stone, water and water-reducing agent in the proportion of kg/m3): CMA: cement: fly ash: coarse sand: fine sand: crushing stone: water: the water reducing agent is: 11.75: 223.25: 95: 432: 432: 1015: 165: 5.8; prepared using the following 5 examples.
Example 1
A preparation method of CMA concrete with a masonry structure strength grade of C25 comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 70 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 5min, and discharging to obtain the prepared concrete mixture.
Example 2
A preparation method of CMA concrete with a masonry structure strength grade of C25 comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand, broken stone and the like into a stirrer to be stirred for 75 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 4.5min, and discharging to obtain the prepared concrete mixture.
Example 3
A preparation method of CMA concrete with a masonry structure strength grade of C25 comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand, broken stone and the like into a stirrer to be stirred for 80 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 4min, and discharging to obtain the prepared concrete mixture.
Example 4
A preparation method of CMA concrete with a masonry structure strength grade of C25 comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand, broken stone and the like into a stirrer to be stirred for 85 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 3.5min, and discharging to obtain the prepared concrete mixture.
Example 5
The CMA concrete for the masonry structure with the strength grade of C25 comprises the following specific preparation steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand, broken stone and the like into a stirrer to be stirred for 90 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 3min, and discharging to obtain the prepared concrete mixture.
Pouring the mixture into a cubic mold with the side length of 150X 150mm, vibrating and compacting, curing the mold under the conditions of constant temperature and constant humidity for 2 days, demolding, curing for 26 days to obtain a CMA concrete test block, and performing a mechanical test on the test block. The 28-day compressive strength value of the test block is 25.37MPa, and meets the regulation of standard GB/T50081-2016 of common concrete mechanical property test method.
The conditions of constant temperature and constant humidity are as follows: the temperature in the curing chamber is constant at 20 +/-2 ℃, and the humidity is kept above 95% RH.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (10)
1. The utility model provides a CMA concrete that is used for masonry structure intensity grade to be C25, comprises CMA, cement, fly ash, coarse sand, fine sand, rubble, water and water-reducing agent, its characterized in that: the mixing ratio is (unit: kg/m)3): CMA: water (W)Mud: fly ash: coarse sand: fine sand: crushing stone: water: the water reducing agent is: 11.75: 223.25: 95: 432: 432: 1015: 165: 5.8.
2. the CMA concrete for masonry structure strength grade C25 of claim 1, wherein: the cow dung comes from Shaanxi province salted-yang breeding dairy farms, and the cow dung is dried in the sun and burnt to obtain CMA.
3. The CMA concrete for masonry structure strength grade C25 of claim 1, wherein: the cement is 42.5R ordinary portland cement; the fly ash adopts III-grade separation fly ash.
4. The CMA concrete for masonry structure strength grade C25 of claim 1, wherein: the sand adopts Chinese ISO standard sand and natural sand, wherein the fineness modulus of the natural sand is 2.39, the sand in the area II has the apparent density of 2.60g/cm3。
5. The CMA concrete for masonry structure strength grade C25 of claim 1, wherein: the crushed stone is basalt, and the diameter of the crushed stone is between 10mm and 30 mm.
6. The CMA concrete for masonry structure strength grade C25 of claim 1, wherein: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is 30%.
7. The method of any one of claims 1 to 6 for the preparation of CMA concrete for masonry structural strength grade C25, characterized in that: the method comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 70-90 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 3-5min (range value) together, and discharging to obtain the prepared concrete mixture.
8. The method for preparing CMA concrete for masonry structure strength grade C25 according to claim 7, wherein the method comprises the following steps: the preparation method comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 70 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 5min, and discharging to obtain the prepared concrete mixture.
9. The method for preparing CMA concrete for masonry structure strength grade C25 according to claim 7, wherein the method comprises the following steps: the preparation method comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 80 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 4min, and discharging to obtain the prepared concrete mixture.
10. The method for preparing CMA concrete for masonry structure strength grade C25 according to claim 7, wherein the method comprises the following steps: the preparation method comprises the following specific steps:
the method comprises the following steps: weighing the components, wherein each cubic meter of concrete has the mass of 11.75kg of CMA, 223.25kg of cement, 95kg of fly ash, 432kg of coarse sand, 432kg of fine sand, 1015kg of broken stone, 165kg of water and 5.8kg of water reducing agent;
step two: pouring the weighed CMA, cement, fly ash, coarse sand, fine sand and gravel into a stirrer to be stirred for 90 s;
step three: and (3) putting the solid water reducing agent into water to be melted and uniformly stirred, adding the water with the solid water reducing agent melted into the stirred material in the stirrer, stirring for 3min, and discharging to obtain the prepared concrete mixture.
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| CN202010421765.8A CN111574152A (en) | 2020-05-18 | 2020-05-18 | CMA concrete with strength grade of C25 for masonry structure and preparation method thereof |
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| CN202010421765.8A CN111574152A (en) | 2020-05-18 | 2020-05-18 | CMA concrete with strength grade of C25 for masonry structure and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216501A (en) * | 2021-04-29 | 2021-08-06 | 西京学院 | Cow dung ash self-heat-insulation building block and manufacturing method thereof |
| CN113651578A (en) * | 2021-08-30 | 2021-11-16 | 西京学院 | Double-doped biomass ash concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242393A (en) * | 2016-07-25 | 2016-12-21 | 铜陵海源超微粉体有限公司 | A kind of C25 concrete formulating method |
| CN109761563A (en) * | 2019-03-15 | 2019-05-17 | 西京学院 | A kind of biomass ash self-insulating concrete and preparation method thereof |
-
2020
- 2020-05-18 CN CN202010421765.8A patent/CN111574152A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242393A (en) * | 2016-07-25 | 2016-12-21 | 铜陵海源超微粉体有限公司 | A kind of C25 concrete formulating method |
| CN109761563A (en) * | 2019-03-15 | 2019-05-17 | 西京学院 | A kind of biomass ash self-insulating concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 袁远等: ""牛粪灰混凝土的综合研究"", 《科学技术创新》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216501A (en) * | 2021-04-29 | 2021-08-06 | 西京学院 | Cow dung ash self-heat-insulation building block and manufacturing method thereof |
| CN113651578A (en) * | 2021-08-30 | 2021-11-16 | 西京学院 | Double-doped biomass ash concrete and preparation method thereof |
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