CN105418013B - A kind of technique for producing green concrete with latter admixing method - Google Patents
A kind of technique for producing green concrete with latter admixing method Download PDFInfo
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- CN105418013B CN105418013B CN201510903861.5A CN201510903861A CN105418013B CN 105418013 B CN105418013 B CN 105418013B CN 201510903861 A CN201510903861 A CN 201510903861A CN 105418013 B CN105418013 B CN 105418013B
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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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a kind of technique for producing green concrete with latter admixing method, this product is using the modified oil palm fruit shell ash replacing partial cement of microorganism, prepare new concrete enhancing additive, then produce that the concrete set time that green concrete prepares is fast using latter admixing method, intensity is big, wear-resisting, it is pressure-resistant, it is impervious, long lifespan, steady quality.
Description
Technical field
The present invention relates to technical field of concrete production, especially a kind of technique for producing green concrete with latter admixing method.
Background technology
With the continuous progress of concrete technology, it is intended that concrete has more excellent performance, such as high intensity, senior engineer
The property made and and high-durability.In addition to common C10, C30, C40, the appearance of the high performance concrete of such as C60, C80 is such as caused
Domestic and foreign scholars and the interest of engineer, and have been applied in nuclear power nuclear island, marine structure, skyscraper, overpass and prevent
Ooze in wall engineering.Domestic research and application to high-strength high-performance concrete is started late, but high-performance coagulation nearly ten years
The research and application development of soil are very fast, and new, efficient, complex function type concrete admixture continually develop also promotes
The development of high performance concrete.
The ratio of mud of concrete can mainly be reduced by being added in concrete after additive, increased slump value and effectively controlled
The gradual loss of the slump processed, improves the workability and mobile performance and the mechanical property of concrete etc. of concrete.So coagulation
Native additive is a kind of important raw material in concrete production, and by pay attention to day by day and is widely used.Commerical ready-mixed concrete is in production
During, additive generally using with mix method, i.e. additive metering it is good after, first put the water measured into, put into together with water
Mixer carries out concrete stirring.And latter admixing method, refer to first put 75% water measured into mixer together with other materials
Stirring, then puts additive into remaining 25% water, then put into the concrete of stirring.Use the method instead
Afterwards, 10~15Kg cement can be saved per square concrete.
Oil palm belongs to perennial monocotyledon, is tropical woody oleiferous plants crop.Pulp, the kernel of oil palm are rich in grease,
The good reputation of " world oil king " is have in various oil crops.China introduces a fine variety existing more than the 80 years history of oil palm, now main distribution
In Hainan, Yunnan, Guangdong, Guangxi and other places.Palm oil is wide popular with consumers because nutritious, and yield is climbed steadily in recent years
Rise.Palm oil also produces the waste materials such as substantial amounts of oil palm fruit shell, fruit stone while consuming a large amount of oil palm fruits when refining, and these waste materials are past
Burnt toward in oil plant as the energy.Ashes after oil palm fruit shell, fruit stone burning are oil palm fruit shell ash, the material
Because having greater activity rich in amorphous glass body SiO2, someone is as a kind of new supplementary cementitious material.But
It is that it still suffers from active low, the shortcoming of setting time length.
The present invention is intended to provide a kind of technique that green concrete is produced with latter admixing method, this product is modified using microorganism
Oil palm fruit shell ash replacing partial cement, prepare new concrete enhancing additive, green then produced using latter admixing method
The concrete set time that concrete is prepared is fast, and intensity is big, wear-resisting, pressure-resistant, impervious, long lifespan, steady quality.
The content of the invention
It is an object of the invention to provide provide a kind of technique for producing green concrete with latter admixing method for base.
Technical scheme is as follows：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) modified oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix (spray
Spill the quality of bacterium solution for oil palm fruit shell ash quality 1%), 35 DEG C of constant temperature place 2-4hr, then 120 DEG C of drying again, will dry afterwards
Oil palm fruit shell ash after dry continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to number
Amount compares 1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
(3) concrete is prepared：
The water that first 75% is measured and cement (the 60% of the cement is substituted with modified oil palm fruit shell ash), coarse aggregate,
Fine aggregate puts mixer stirring into together, then additive is put to remaining 25% water into, then put into stirring
In concrete.
The addition of the concrete admixture is 0.5%.
Use instead after the method, 10-15Kg cement can be saved per side's concrete
Latter admixing method saves the mechanism of cement：
The mechanism of action that additive improves concrete mix mobility mainly includes peptizaiton and wetting action.It is scattered
Effect：After cement plus water is mixed and stirred, due to the interaction of gravitation between cement granules molecule so that 10%~30% water is wrapped
Being rolled among cement granules to flow freely, and reduce the mobility of mixture.When add additive after its ion by
Electrostatic force is adsorbed in cement particle surface, makes cement particle surface with the formation Coulomb repulsion of same electric charge, promotes cement
Particle disperse and discharge parcel moisture make its participate in flowing, so as to add the mobility of concrete batching system.Wetting action：
The free energy reduction of system is to soak after liquid-solid two phase contact.The wetting that can change solid-liquid system using surfactant is made
With, and surfactant can form adsorption layer after surface of solids absorption, can significantly change the wetting action of the surface of solids.Cause
This, additive can increase the wetting property of cement, it is preferably spontaneously wet out by water, so that hydrated sheath and fine micelle are easily formed,
Concrete batching system mobility is set further to improve.
But concrete be a kind of nonuniformity, not etc. to multiphase mixing material.Cement, admixture, bone in whipping process
Material and the mud brought into by aggregate etc. all can reduce the use function of additive to additional dosage form into extra absorption.Mixed after
After method, water is allowed first to participate in stirring, the additional adsorption with regard to additive can be substantially reduced, so as to play the work(of additive to a greater extent
Effect.
There are extremely a variety of microorganisms and be proved to have a variety of functions in the Nature, the present invention is first using specific compound
Microorganism is modified to oil palm fruit shell ash, has had been surprisingly found that and concrete quality is greatly improved.
The present invention is advantageous in that：
The present invention provides a kind of technique that green concrete is produced with latter admixing method, and this product is using the modified oil of microorganism
The grey replacing partial cement of brown shell, prepares new concrete enhancing additive, then produces green coagulation using latter admixing method
The concrete set time that soil is prepared is fast, and intensity is big, wear-resisting, pressure-resistant, impervious, long lifespan, steady quality.
Embodiment
Embodiment 1：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) modified oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix (spray
Spill the quality of bacterium solution for oil palm fruit shell ash quality 1%), 35 DEG C of constant temperature place 2hr, then 120 DEG C of drying again, afterwards will drying
Oil palm fruit shell ash afterwards continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to number
Amount compares 1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
(3) concrete is prepared：
The water and cement that first 75% is measured, river sand, rubble put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring.
The cement：River sand：Rubble：The mass ratio of water total amount is：0.9：1.5：2：0.25；
The 60% of the cement is substituted with modified oil palm fruit shell ash；
The addition of the concrete admixture is 0.5%.
Embodiment 2：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) modified oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix (spray
Spill the quality of bacterium solution for oil palm fruit shell ash quality 1%), 35 DEG C of constant temperature place 4hr, then 120 DEG C of drying again, afterwards will drying
Oil palm fruit shell ash afterwards continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to number
Amount compares 1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
(3) concrete is prepared：
The water and cement that first 75% is measured, river sand, rubble put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring.
The cement：River sand：Rubble：The mass ratio of water total amount is：0.9：1.5：2：0.25；
The 60% of the cement is substituted with modified oil palm fruit shell ash；
The addition of the concrete admixture is 0.5%.
Embodiment 3：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) modified oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix (spray
Spill the quality of bacterium solution for oil palm fruit shell ash quality 1%), 35 DEG C of constant temperature place 3hr, then 120 DEG C of drying again, afterwards will drying
Oil palm fruit shell ash afterwards continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to number
Amount compares 1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
(3) concrete is prepared：
The water and cement that first 75% is measured, river sand, rubble put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring.
The cement：River sand：Rubble：The mass ratio of water total amount is：0.9：1.5：2：0.25；
The 60% of the cement is substituted with modified oil palm fruit shell ash；
The addition of the concrete admixture is 0.5%.
Embodiment 4：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) modified oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix (spray
Spill the quality of bacterium solution for oil palm fruit shell ash quality 1%), 35 DEG C of constant temperature place 2hr, then 120 DEG C of drying again, afterwards will drying
Oil palm fruit shell ash afterwards continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to number
Amount compares 1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
(3) concrete is prepared：
The water and cement that first 75% is measured, river sand, rubble put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring.
The cement：River sand：Rubble：The mass ratio of water total amount is：0.9：1.5：2：0.25；
The 60% of the cement is substituted with modified oil palm fruit shell ash；
The addition of the concrete admixture is 0.5%.
Embodiment 5：
Comparative example, uses unmodified oil palm fruit shell ash：
A kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
(1) concrete admixture is prepared：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, drips while stirring
Plus acrylic monomers, time for adding controls in 45min, drips constant temperature one hour, be cooled to 45 DEG C, hydramine is added dropwise, during dropwise addition
Between control in 50min, it is finished product to drip off constant temperature 50 DEG C one hour；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
(2) oil palm fruit shell ash is prepared：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then 120 DEG C of drying again, afterwards by after drying
Oil palm fruit shell ash continues to calcine 100min at a temperature of being placed in 520 DEG C, levigate again；
(3) concrete is prepared：
The water and cement that first 75% is measured, river sand, rubble put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring.
The cement：River sand：Rubble：The mass ratio of water total amount is：0.9：1.5：2：0.25；
The 60% of the cement is substituted with modified oil palm fruit shell ash；
The addition of the concrete admixture is 0.5%.
Embodiment 6：
Continuation detects that its result is such as shown in Table 1 to concrete reinforcing aids made from embodiment 1-5.
Table 1
The concrete of the present invention also has the anti-freezing property and shrinkage of improved concrete.
Curing age was reached after 28 days, after 200 Frozen-thawed cycleds, tested the mass loss of concrete test block
Rate and relative dynamic elastic modulus, finding the quality and volume of embodiment 5 has the loss no more than 2%, and embodiment 1-4 is almost examined
Mass loss and contraction are not detected, the modified modification oil palm fruit shell ash of this explanation microorganism replaces cement, with extremely notable
Improvement effect.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (3)
1. a kind of method that green concrete is produced with latter admixing method, it is characterised in that step is as follows：
（1）Prepare concrete admixture：
Polyether macromonomer is added in water, sulfonate heats up 60 DEG C, sulfonation half an hour, adds initiator, third is added dropwise while stirring
Acrylic monomer, time for adding is controlled in 45min, drips constant temperature one hour, is cooled to 45 DEG C, and hydramine, time for adding control is added dropwise
System is in 50min, and it one hour is finished product to drip off constant temperature 50 DEG C；
The mass ratio of the sulfonate and polyether macromonomer is 1:3,
The mass ratio of the initiator and polyether macromonomer is 1:2.5；
Environmental protection colourless transparent liquid shape concrete admixture is made；
（2）Prepare modified oil palm fruit shell ash：
The former ash remained after oil palm fruit shell is burnt is levigate with ball mill, then uniform to spray composite bacteria liquid and mix, 35 DEG C of perseverances
Temperature places 2-4hr, then 120 DEG C of drying, continues to calcine at a temperature of the oil palm fruit shell ash after drying is placed in into 520 DEG C afterwards
100min, it is levigate again；
The formula of the composite bacteria liquid is：According to bacillus megaterium, bacillus pumilus, production gastral cavity Candida is according to quantity ratio
1：1：2 are configured to the composite bacteria liquid that bacterium number content is 600,000,000/ml；
（3）Prepare concrete：
The water and cement that first 75% is measured, coarse aggregate, fine aggregate put mixer stirring into together, then put additive into
In remaining 25% water, then put into the concrete of stirring；
The 60% of wherein described cement is substituted with modified oil palm fruit shell ash.
2. the method according to claim 1 that green concrete is produced with latter admixing method, it is characterised in that：
The step（2）In, the quality of sprinkling bacterium solution is the 1% of oil palm fruit shell ash quality.
3. the method according to claim 2 that green concrete is produced with latter admixing method, it is characterised in that：
The addition of the concrete admixture is 0.5%.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10717674B2 (en) | 2010-04-27 | 2020-07-21 | Biomason, Inc. | Methods for the manufacture of colorfast masonry |
| WO2018081542A1 (en) | 2016-10-31 | 2018-05-03 | Biomason, Inc. | Microorganism loaded aggregate and manufacturing methods |
| US10221097B1 (en) | 2017-08-30 | 2019-03-05 | Imam Abdulrahman Bin Faisal University | Date palm ash based cement compositions |
| WO2019071175A1 (en) * | 2017-10-05 | 2019-04-11 | Biomason, Inc. | Biocementation method and system |
| CN109503065A (en) * | 2018-11-14 | 2019-03-22 | 铜仁市万山区建辉新型环保建材有限公司 | A kind of anti-corrosion concrete and preparation method thereof |
| CN109437689A (en) * | 2018-12-07 | 2019-03-08 | 重庆金鸿纬科技有限公司 | A kind of technique of assembled architecture green concrete |
| CN112777969A (en) * | 2021-01-05 | 2021-05-11 | 佛山市洵腾科技有限公司 | Environment-friendly interlocking block and preparation method thereof |
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|---|---|---|---|---|
| CN101270369A (en) * | 2008-05-06 | 2008-09-24 | 清华大学 | Microorganism cause concrete or concrete, producing method and application thereof |
| CN103539400A (en) * | 2013-05-15 | 2014-01-29 | 浙江建设职业技术学院 | Green high-performance concrete with superfine oil palm fruit shell ash |
| CN104086112A (en) * | 2014-06-25 | 2014-10-08 | 江苏奥莱特新材料有限公司 | Multifunctional enhancement-type concrete admixture and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270369A (en) * | 2008-05-06 | 2008-09-24 | 清华大学 | Microorganism cause concrete or concrete, producing method and application thereof |
| CN103539400A (en) * | 2013-05-15 | 2014-01-29 | 浙江建设职业技术学院 | Green high-performance concrete with superfine oil palm fruit shell ash |
| CN104086112A (en) * | 2014-06-25 | 2014-10-08 | 江苏奥莱特新材料有限公司 | Multifunctional enhancement-type concrete admixture and preparation method thereof |
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