CN101525223A - High fly ash commercial concrete or ready-mixed concrete - Google Patents
High fly ash commercial concrete or ready-mixed concrete Download PDFInfo
- Publication number
- CN101525223A CN101525223A CN200910061212A CN200910061212A CN101525223A CN 101525223 A CN101525223 A CN 101525223A CN 200910061212 A CN200910061212 A CN 200910061212A CN 200910061212 A CN200910061212 A CN 200910061212A CN 101525223 A CN101525223 A CN 101525223A
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- CN
- China
- Prior art keywords
- concrete
- ready
- mixed concrete
- fly ash
- aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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 high fly ash commercial concrete or ready-mixed concrete or a preparation method thereof. The high fly ash commercial concrete or ready-mixed concrete is made from gelled material, aggregate, chemical additive and water; wherein, the gelled material comprises cement and fly ash; the aggregate comprises fine aggregate and coarse aggregate; and the chemical additive is polycarboxylate-based high performance water reducer. The usage of the gelled material is 360-480kg/m<3>concrete; wherein, the concrete is 47%-69wt% of the total gelled material; and the fly ash is 31%-53wt% of the total gelled material. The concrete has good workability, suitable strength and strength development, lower hydration temperature rising, higher volume stabilization, higher cracking resistance, impermeability, frost resistance, corrosion stability, resistance to carbonizing, alkali-resistant-aggregate reaction and chloride-resistant diffusibility.
Description
Technical field
The invention belongs to civil engineering material technical field, particularly a kind of commerical ready-mixed concrete of high fly ash or ready-mixed concrete.
Background technology
Concrete material is the requisite structured materials of all capital constructions, also is the artificial material that purposes is the widest, consumption is maximum, traces it to its cause, and concrete material is the matrix material with complex construction with the simplest production technique manufacturing.The modern concrete science and technology is exactly will be by certain technique means, and the relation between the various performances of the kind of each composition material of balance concrete, consumption and concrete constantly makes concrete high-performanceization to greatest extent.Raising along with operating technique and civilized construction level, especially the continuous reinforcement of environmental consciousness, concentrate ready-mixed concrete, ready mixed concrete or commerical ready-mixed concrete to become the main force that makes concrete material, this just lays a good foundation for the commerical ready-mixed concrete high performance.
With the weather resistance be distinctive marks, take into account concrete concrete mix workability and intensity and strength development, that take into full account save energy resource and environment protection and be called high performance concrete.The required concrete material of modern building or structure must be a high-performance concrete material.To the finding discovery of the commerical ready-mixed concrete quality of production,, concrete quality generally lower to the modern concrete technology level of understanding fluctuates greatly, cement consumption is too much, water-cement ratio is bigger than normal, is the subject matter that exists according at present.On the other hand, the concrete structure cracking phenomena can be found everywhere, and has had a strong impact on the weather resistance of concrete structure.And the main factor that influences concrete durability is its volume stability, and its macro manifestations mainly contains: the 1. shrinkage strain that causes such as plastic shrinkage, self-constriction, chemical shrinkage, dry shrinkage; 2. the aquation temperature rise causes the inner and outside temperature difference that produces of large volume concrete structural, causes the concrete structure cracking; The discordant of the tensile stress that 3. early stage tensile strength development and shrinkage strain produce; 4. the non-homogeneity of concrete material self and instability etc.Modern building or structures are not only had higher requirement to the mechanical property of concrete material, more the durability index of concrete material and the weather resistance of concrete structure are more and more paid attention to, and corresponding techniques requirement, the producer of concrete material---commerical ready-mixed concrete stirring station proposed.
Summary of the invention
The objective of the invention is to overcome the problem of above-mentioned existence, and a kind of commerical ready-mixed concrete or ready-mixed concrete of high fly ash are provided.By adopting polycarboxylate high performance water-reducing agent, reduce water-cement ratio significantly, by high fly ash; optimize concrete mix; make concrete high-performanceization, when guaranteeing that early age strength of concrete satisfies construction requirement, guarantee the late strength of concrete steady progression.
For realizing purpose of the present invention, the technical scheme of employing is:
A kind of commerical ready-mixed concrete of high fly ash or ready mixed concrete, it is to be made by gelling material, aggregate, chemical admixture and water, gelling material is made up of cement and flyash, and aggregate is made up of fine aggregate and coarse aggregate, and chemical admixture is a polycarboxylate high performance water-reducing agent.
The consumption of above-mentioned gelling material is 360～480kg/m
3Concrete.
In the above-mentioned gelling material, cement is 42.5 strength grades and above silicate cement or ordinary Portland cement, and its consumption is 47%～69wt% of binder total amount; Flyash is low calcium of GB I level, II level or high-calcium fly ass, and its consumption is 31%～53wt% of binder total amount.
Above-mentioned fine aggregate is mountain sand, river sand or machine-processed sand, and its fineness modulus is that 1.6～2.2 thin level sand or fineness modulus are 2.3～3.0 thick level sand, or is that fineness modulus is 3.1～3.7 thick level sand, and grating is qualified;
Above-mentioned coarse aggregate is rock rubbles commonly used such as gravel or limestone gravel, sandstone rubble, quartzite rubble, basaltic broken stone, granite stones, and maximum particle diameter is not more than 40.0mm; Can be 4.75mm～21.5mm continuous grading, or 4.75mm～40.0mm continuous grading, also can be 4.75mm～10.0mm, 10.0mm～21.5mm two gratings, or be 4.75mm～10.0mm, 10.0mm～21.5mm, 21.5mm～40.0mm three gratings.
Above-mentioned concrete water-cement ratio is 0.25～0.45 (ratio of mixing water weight and gelling material weight in every cubic meter of concrete).
The present invention utilizes polycarboxylate high performance water-reducing agent to have the characteristics of high water reducing rate, reduced water-cement ratio significantly, realized high fly ash technological line, give full play to the micro aggregate effect and the secondary hydration active effect of flyash, by coordination, concrete strength and the strength development of concrete mix high workability and other performances and the coordination of shrinkage strain, the coordination of concrete strength and strength development and aquation temperature rise, preparation has the high-performance commerical ready-mixed concrete material of high workability, higher-strength and strength development, high-durability.The strength grade of gained high performance concrete of the present invention is contained C30～C60.
Compared with prior art, the commerical ready-mixed concrete that adopts technological line of the present invention and method to prepare has good workability or workability is beneficial to Concrete Construction, have proper intensity and strength development design requirements and service requirements to satisfy structural concrete, has lower aquation temperature rise and higher volumes stability, than high cracking resistance and have impermeability concurrently, frost resistance, corrosion stability, anti-carbonization is to satisfy life requirement, characteristics with high fly ash, to satisfy the requirement of concrete technology Sustainable development, also reduce the consumption of cement simultaneously, reduced production cost.
Embodiment
Preferred implementation of the present invention (comparing) with the normal concrete of mixing naphthalene series high-efficiency water-reducing agent:
Starting material: intensity is not less than silicate cement or the ordinary Portland cement of 42.5MPa, GB I level or II level flyash, fineness is at 1.7～2.2 thin level sand or 2.3～3.0 intermediate sand (natural sand or artificial sand), the rubble of particle diameter in 5～31.5mm scope, polycarboxylate high performance water-reducing agent and naphthalene series high-efficiency water-reducing agent, the water of usefulness as a comparison, according to the listed proportioning of table 1, metering respectively.
The preparation method: the metering system of system, particularly mixing water metering system are mixed and stirred in requirement and the chemical admixture metering system should have higher precision, and error should be below 0.03%; Simultaneously, also should in time adjust the consumption of mixing water according to water ratio thick, fine aggregate; The error in dipping of flyash is not more than 2%.At first sand is dropped into stirrer, again cement and flyash are dropped into stirrer respectively, then stone is dropped into stirrer, at last polycarboxylate high performance water-reducing agent (or the naphthalene series high-efficiency water-reducing agent of usefulness) is as a comparison added in the forced concrete mixer and stirred 120 seconds, promptly can be made into apparent density and be about 2450kg/m
3The high-performance commerical ready-mixed concrete, resultant concrete has the listed various performances of table 2.
Sand coarse aggregate ratio is the ratio of fine aggregate weight and aggregate gross weight in every side's concrete, the size of sand coarse aggregate ratio directly affects the workability of fresh concrete, therefore, the size of sand coarse aggregate ratio should be adjusted according to the kind of fine aggregate, the thickness degree of fine aggregate and the workability of fresh concrete, for example, when fine aggregate thickness degree is identical, adopt the sand coarse aggregate ratio of natural sand lower than the sand coarse aggregate ratio that adopts machine-processed sand, when the fine aggregate kind is identical, adopt lower than adopting than the sand coarse aggregate ratio of coarse sand than the sand coarse aggregate ratio of fine sand.
The high fly ash commerical ready-mixed concrete of table 1 proportioning (pumping) unit: weight percent (%)
As can be seen from Table 1:
1. with the raising of strength grade of concrete, the consumption of gelling material improves in the concrete, and doping quantity of fly ash reduces.
2. when strength grade of concrete was identical, its gel material content of concrete of employing naphthalene series high-efficiency water-reducing agent is higher than mixed the concrete gel material content of polycarboxylic acid series high-performance, and the volume of flyash is less than the latter.
The concrete fundamental property of the high fly ash of table 2
As can be seen from Table 2:
1. when proportioning is identical, adopt the concrete of machine-processed sand as fine aggregate, its intensity is higher than the concrete of employing river sand as fine aggregate.
2. adopt the concrete of polycarboxylate high performance water-reducing agent, its mixture initial flow is better, and the loss of mobile time dependent is little, helps long-distance transportation, helps hot weather construction.
3. concrete intensity all can meet the demands.
Be the various performance perameters of high-performance commerical ready-mixed concrete of the present invention below:
Have mix flowability preferably, the slump is 50～220mm, and slump-loss 0～10% in 1 hour; Concrete mix homogeneity is not preferably emanated, bleeding not; The presetting period of concrete mix is 12～16 hours, and final setting time is 14～18 hours; Proper intensity and strength development, especially later strength increase very fast; Good splitting resistance, 28 days drying shrinkage value 100～200 * 10 of concrete
-6Lower hydration heat, the 7 day length of time is smaller or equal to 45.0 ℃ smaller or equal to 30.0 ℃ the 3 day length of time for the concrete thermal insulation warming; Higher endurance quality, the resisting erosion of sulfate coefficient is not less than 0.90, and has higher alkali resistant-aggregate reaction and resisting chloride ion penetration diffusion.
Claims (5)
1, a kind of commerical ready-mixed concrete of high fly ash or ready mixed concrete, it is to be made by gelling material, aggregate, admixture and water, it is characterized in that: gelling material is made up of cement and flyash, and aggregate is made up of fine aggregate and coarse aggregate, and admixture is a polycarboxylate high performance water-reducing agent.
2, the commerical ready-mixed concrete of high fly ash according to claim 1 or ready mixed concrete is characterized in that: the consumption of described gelling material is 360～480kg/m
3Concrete.
3, according to the commerical ready-mixed concrete or the ready mixed concrete of claim 1 and 2 described high fly ashs, it is characterized in that: in the described gelling material, cement is 42.5 strength grades and above silicate cement or ordinary Portland cement, and its consumption is 47%～69wt% of binder total amount; Flyash is low calcium of GB I level, II level or high-calcium fly ass, and its consumption is 31%～53wt% of binder total amount.
4, the commerical ready-mixed concrete of high fly ash according to claim 1 or ready mixed concrete, it is characterized in that: described fine aggregate is mountain sand, river sand or machine-processed sand, its fineness modulus is that 1.6～2.2 thin level sand or fineness modulus are 2.3～3.0 thick level sand, or be that fineness modulus is 3.1～3.7 thick level sand, and grating is qualified; Described coarse aggregate is rock rubbles commonly used such as gravel or limestone gravel, sandstone rubble, quartzite rubble, basaltic broken stone, granite stones, and maximum particle diameter is not more than 40.0mm; Can be 4.75mm～21.5mm continuous grading, or 4.75mm～40.0mm continuous grading, also can be 4.75mm～10.0mm, 10.0mm～21.5mm two gratings, or be 4.75mm～10.0mm, 10.0mm～21.5mm, 21.5mm～40.0mm three gratings.
5, the commerical ready-mixed concrete of high fly ash according to claim 1 and 2 or ready mixed concrete is characterized in that: described concrete water-cement ratio is 0.25～0.45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910061212A CN101525223A (en) | 2009-03-20 | 2009-03-20 | High fly ash commercial concrete or ready-mixed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910061212A CN101525223A (en) | 2009-03-20 | 2009-03-20 | High fly ash commercial concrete or ready-mixed concrete |
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| Publication Number | Publication Date |
|---|---|
| CN101525223A true CN101525223A (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910061212A Pending CN101525223A (en) | 2009-03-20 | 2009-03-20 | High fly ash commercial concrete or ready-mixed concrete |
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| CN (1) | CN101525223A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337715A (en) * | 2010-07-26 | 2012-02-01 | 贵州中建建筑科研设计院有限公司 | Granite concrete pavior brick and its manufacturing method |
| CN102531487A (en) * | 2011-12-09 | 2012-07-04 | 平顶山市恒基混凝土有限公司 | Heat resistance concrete and preparation method thereof |
| CN103936360A (en) * | 2014-03-17 | 2014-07-23 | 乌海市公路工程有限公司 | High-performance concrete and its preparation method |
| CN104370505A (en) * | 2013-08-16 | 2015-02-25 | 山西华通蓝天环保有限公司 | High mixing amount active fly ash modified green concrete and producing method thereof |
| CN105236861A (en) * | 2015-09-14 | 2016-01-13 | 安徽芜湖飞琪水泥制品有限公司 | Anti-cracking cement pile material composition and anti-cracking cement pile preparation method |
| CN105731919A (en) * | 2016-01-05 | 2016-07-06 | 葛洲坝集团试验检测有限公司 | Concrete with ultrahigh content of mixed fly ash |
| CN109776051A (en) * | 2019-02-28 | 2019-05-21 | 中国建筑第八工程局有限公司 | Low-cost high-strength concrete |
| CN109970409A (en) * | 2019-03-18 | 2019-07-05 | 北京国旺混凝土有限公司 | A kind of commerical ready-mixed concrete and preparation method thereof of high intensity |
| CN112358258A (en) * | 2020-11-11 | 2021-02-12 | 宁夏大学 | Concrete for improving sulfate freeze resistance and test method |
| CN113072338A (en) * | 2021-03-30 | 2021-07-06 | 山东京博环保材料有限公司 | Commercial concrete prepared by using FCC (fluid catalytic cracking) waste catalyst and preparation method thereof |
| CN113816693A (en) * | 2021-10-21 | 2021-12-21 | 深圳市港龙混凝土有限公司 | High-performance premixed concrete and preparation method thereof |
| CN114477907A (en) * | 2022-02-18 | 2022-05-13 | 涉县清漳水泥制造有限公司 | Premixed pump concrete prepared from coal-made oil residues and preparation method thereof |
| CN114605114A (en) * | 2022-03-07 | 2022-06-10 | 中交路桥建设有限公司 | High-strength white concrete with whiteness larger than 85 |
| CN115073071A (en) * | 2022-06-27 | 2022-09-20 | 宁夏赛马科进混凝土有限公司 | Underwater cast-in-place pile concrete produced by utilizing high-volume fly ash and recycled fine aggregate |
-
2009
- 2009-03-20 CN CN200910061212A patent/CN101525223A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337715A (en) * | 2010-07-26 | 2012-02-01 | 贵州中建建筑科研设计院有限公司 | Granite concrete pavior brick and its manufacturing method |
| CN102531487A (en) * | 2011-12-09 | 2012-07-04 | 平顶山市恒基混凝土有限公司 | Heat resistance concrete and preparation method thereof |
| CN102531487B (en) * | 2011-12-09 | 2014-03-05 | 平顶山市恒基混凝土有限公司 | Heat resistance concrete and preparation method thereof |
| CN104370505A (en) * | 2013-08-16 | 2015-02-25 | 山西华通蓝天环保有限公司 | High mixing amount active fly ash modified green concrete and producing method thereof |
| CN103936360A (en) * | 2014-03-17 | 2014-07-23 | 乌海市公路工程有限公司 | High-performance concrete and its preparation method |
| CN105236861A (en) * | 2015-09-14 | 2016-01-13 | 安徽芜湖飞琪水泥制品有限公司 | Anti-cracking cement pile material composition and anti-cracking cement pile preparation method |
| CN105731919A (en) * | 2016-01-05 | 2016-07-06 | 葛洲坝集团试验检测有限公司 | Concrete with ultrahigh content of mixed fly ash |
| CN109776051A (en) * | 2019-02-28 | 2019-05-21 | 中国建筑第八工程局有限公司 | Low-cost high-strength concrete |
| CN109970409A (en) * | 2019-03-18 | 2019-07-05 | 北京国旺混凝土有限公司 | A kind of commerical ready-mixed concrete and preparation method thereof of high intensity |
| CN112358258A (en) * | 2020-11-11 | 2021-02-12 | 宁夏大学 | Concrete for improving sulfate freeze resistance and test method |
| CN113072338A (en) * | 2021-03-30 | 2021-07-06 | 山东京博环保材料有限公司 | Commercial concrete prepared by using FCC (fluid catalytic cracking) waste catalyst and preparation method thereof |
| CN113816693A (en) * | 2021-10-21 | 2021-12-21 | 深圳市港龙混凝土有限公司 | High-performance premixed concrete and preparation method thereof |
| CN113816693B (en) * | 2021-10-21 | 2022-07-12 | 深圳市港龙混凝土有限公司 | High-performance premixed concrete and preparation method thereof |
| CN114477907A (en) * | 2022-02-18 | 2022-05-13 | 涉县清漳水泥制造有限公司 | Premixed pump concrete prepared from coal-made oil residues and preparation method thereof |
| CN114605114A (en) * | 2022-03-07 | 2022-06-10 | 中交路桥建设有限公司 | High-strength white concrete with whiteness larger than 85 |
| CN115073071A (en) * | 2022-06-27 | 2022-09-20 | 宁夏赛马科进混凝土有限公司 | Underwater cast-in-place pile concrete produced by utilizing high-volume fly ash and recycled fine aggregate |
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Open date: 20090909 |