CN109574529A - A kind of functional form recycled aggregate and preparation method and application reducing regeneration concrete workability gradual loss - Google Patents
A kind of functional form recycled aggregate and preparation method and application reducing regeneration concrete workability gradual loss Download PDFInfo
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- CN109574529A CN109574529A CN201811485396.8A CN201811485396A CN109574529A CN 109574529 A CN109574529 A CN 109574529A CN 201811485396 A CN201811485396 A CN 201811485396A CN 109574529 A CN109574529 A CN 109574529A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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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- 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
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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
- 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
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Abstract
The present invention discloses a kind of functional form recycled aggregate and preparation method and application for reducing regeneration concrete workability gradual loss, recycled aggregate is dried first, remove the moisture in the mortar voids of recycled aggregate surface, recycled aggregate after obtained drying is totally immersed in 1 in high efficiency water reducing agent~for 24 hours, then it pulls out and is dried in the shade at aeration-drying at room temperature to get the functional form recycled aggregate of regeneration concrete workability gradual loss is reduced.Its preparation for being used for regenerative concrete, the Slump Time losing of Large of regeneration concrete can be effectively reduced, the especially 1h slump is up to 180-200mm, than being added without, the 1h slump of the resulting regeneration concrete of the functional form recycled aggregate of reduction regeneration concrete workability gradual loss of the invention improves 111-150%, and early strength and 28 days compression strength are preferable, early strength is 13.9-15.2MPa, and 28 days compression strength is 24-8-25.7Mpa.
Description
Technical field
The present invention relates to a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss and its preparation sides
Method and application belong to the recycled concrete field in architectural engineering.
Background technique
Regenerated aggregate concrete application is in engineering at present, and there are still many technical bottlenecks.Recycled aggregate surface is different from day
There is a large amount of old mortar package on right aggregate, surface, and porosity is very high.This objectively causes recycled aggregate water absorption rate very
Height, rate of water absorption are fast.Therefore, the regeneration concrete prepared with recycled aggregate, especially high aggregate Replacement rate regeneration concrete work
The property made is poor, and Slump Time losing of Large is very big, is generally all expressed as gradual loss, i.e., loss concrete delivery at any time to building site
Afterwards, often lost mobility, can not normal construction, this is also one of the main bugbear of regeneration concrete engineer application.
Currently, water can be added in the regeneration concrete of partially hardened so that its recovered part by having the building site of construction experience
Mobility, so as to normal construction.But this method will cause concrete disintegration, bleeding, and the concrete after hardening will appear
Pitted skin, honeycomb and other issues.Therefore, this method and undesirable.
A small amount of water-reducing agent is added in the regeneration concrete that mobility reduces can effectively improve its workability, but due to being fortune
It is added at one time after sending to building site, but the part serious slurries of dehydration situation are still difficult to restore mobility.
Summary of the invention
An object of the present invention is to be added at one time after being transported to building site in order to solve above-mentioned regeneration concrete to subtract
Aqua, but the part serious slurries of dehydration situation are still difficult to restore the technical problems such as mobility and provide a kind of reduction concrete
The functional form recycled aggregate of regeneration concrete workability gradual loss, functional form recycled aggregate substitution is above-mentioned in the prior art
Partial regeneration aggregate be incorporated into regeneration concrete after, the Slump Time losing of Large of resulting regeneration concrete can obviously subtract
It is few, after regeneration concrete is transported to building site, still has good mobility, can be directly used for pouring construction.
The second object of the present invention is to provide a kind of above-mentioned reduction concrete regenerating workability of concrete gradual loss
The preparation method of functional form recycled aggregate, the preparation method due to being made only with high efficiency water reducing agent and recycled aggregate, because
This preparation method has many advantages, such as that preparation is simple, and preparation cost is cheap.
The third object of the present invention is to provide a kind of functional form of above-mentioned reduction regeneration concrete workability gradual loss
Recycled aggregate is used for the preparation method of regeneration concrete.
Technical solution of the present invention
A kind of functional form recycled aggregate reducing regeneration concrete workability gradual loss, passes through the side included the following steps
Method is prepared:
(1), recycled aggregate is dried controlled at 105 ± 5 DEG C, removes the water in the mortar voids of recycled aggregate surface
Point, the recycled aggregate after being dried；
The recycled aggregate is that partial size is 5-25mm, using Vertical Mill technique preparation or using Hubei Province be broken into shape it is standby,
Or the recycled aggregate for rinsing preparation after type through clear water is broken into using Hubei Province；
(2), the recycled aggregate after step (1) resulting drying is totally immersed in 1 in high efficiency water reducing agent~for 24 hours, efficiently
Water-reducing agent is obtained since immersional wetting and capillarity can be filled up completely in the gap of the recycled aggregate surface mortar after drying
Suction has the recycled aggregate after the drying of high efficiency water reducing agent；
The high efficiency water reducing agent is that the polycarboxylic acid that national standard " concrete admixture " (GB8076-2008) is defined efficiently subtracts
Aqua, water-reducing rate 25-50%, preferably 803 high efficiency water reducing agents in various embodiments of the present invention, but it is not intended to limit other polycarboxylic acids
Analog high efficiency water reducing agent reduces the application of the functional form recycled aggregate of regeneration concrete workability gradual loss in preparation；
The above-mentioned resulting recycled aggregate inhaled after having the drying of high efficiency water reducing agent is detected to the absorptivity of high efficiency water reducing agent
It is calculated by mass percentage as 3.3-6.2%；
(3), pulling the resulting suction of step (2) out has the recycled aggregate after the drying of high efficiency water reducing agent, at room temperature aeration-drying
(because water-reducing agent is organic substance, high temperature will cause the destruction of diminishing agent molecule) is dried in the shade to get regeneration concrete work is reduced in place
The functional form recycled aggregate of property gradual loss.
A kind of functional form recycled aggregate of above-mentioned reduction regeneration concrete workability gradual loss is used for regeneration concrete
Preparation, especially be used for C20 or C30 regeneration concrete preparation, by preparation 1m3The amount of regeneration concrete calculates, and makes
Standby raw material composition and content used are as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S95, S105 or S115；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is that the polycarboxylic acid that national standard " concrete admixture " (GB8076-2008) is defined efficiently subtracts
Aqua, water-reducing rate 25-50%, preferably 803 high efficiency water reducing agents in the embodiment of the present invention, but it is not intended to limit other polycarboxylic acids
High efficiency water reducing agent reduces the application of the functional form recycled aggregate of regeneration concrete workability gradual loss in preparation.
A kind of functional form recycled aggregate of above-mentioned reduction regeneration concrete workability gradual loss is used for regeneration concrete
Preparation, the specific steps are as follows:
Firstly, by recycled aggregate, functional form recycled aggregate, yellow ground, the water of reduction regeneration concrete workability gradual loss
Mud, flyash, miberal powder put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains containing reduction
The regeneration concrete of the functional form recycled aggregate of regeneration concrete workability gradual loss.
Advantageous effects of the invention
A kind of functional form recycled aggregate of reduction regeneration concrete workability gradual loss of the invention, is regenerated coarse aggregate
Be filled high efficiency water reducing agent in the gap of surface mortar and obtained, thus its be used for regeneration concrete preparation after, it is resulting to contain drop
In the regeneration concrete transportational process of the functional form recycled aggregate of low regeneration concrete workability gradual loss, regenerated due to reducing
It will be slow in the functional form recycled aggregate of workability of concrete gradual loss and release high efficiency water reducing agent, since high efficiency water reducing agent is
It is gradually precipitated from the gap of functional form recycled aggregate for reducing regeneration concrete workability gradual loss, therefore mixed in regeneration
Solidifying soil is transported from mixing plant into the overall process in building site, and high efficiency water reducing agent can mend the mobility of regeneration concrete
It repays, so that regeneration concrete is still able to maintain good mobility after being delivered to building site.To compensate for it is in the prior art again
Growing concrete is transported to the defect that water-reducing agent influence liquidity is added at one time behind building site.
Further, the preparation of the functional form recycled aggregate of a kind of reduction regeneration concrete workability gradual loss of the invention
Method, since only with the techniques such as impregnating, drying, preparation process is simple, further, due to preparing raw materials only
There are water-reducing agent and recycled aggregate, therefore preparation cost is cheap.
Further, the functional form recycled aggregate of a kind of reduction regeneration concrete workability gradual loss of the invention is used
In the preparation of C20-C30 regeneration concrete, the final resulting functional form for containing reduction regeneration concrete workability gradual loss
The C20-C30 regeneration concrete 1h slump of recycled aggregate regenerates coagulation up to 180-200mm, than being added without reduction of the invention
The 1h slump of the resulting regeneration concrete of functional form recycled aggregate of native workability gradual loss improves 111-150%, and early
Phase intensity and 28 days compression strength are preferable, and early strength 13.9-15.2MPa, 28 days compression strength is 24-8-25.7Mpa.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, lead to below
Crossing specific embodiment, the present invention will be described in detail, but is not intended to limit the present invention.
The information of the specification and manufacturer of various raw materials or reagent used in various embodiments of the present invention is as follows:
Contain the functional form regeneration for reducing regeneration concrete workability gradual loss described in Application Example of the present invention
In C20 the or C30 regeneration concrete of aggregate:
" normal concrete mix physical performance tries according to GB/T50080-2002 for initial slump (mm), the 1h slump (mm)
Test method standard " it is tested；
3 days, 7 days, 28 days compression strength (Mpa) is according to GB/T50081-2002 " normal concrete mechanical property test
Method standard " it is measured.
Embodiment1
A kind of functional form recycled aggregate reducing regeneration concrete workability gradual loss, passes through the side included the following steps
Method is prepared:
(1), recycled aggregate is dried controlled at 100 DEG C, to remove in the mortar voids of regenerated coarse aggregate surface
Moisture, the recycled aggregate after being dried；
The recycled aggregate is that Hubei Province of partial size 5-25mm is broken into the recycled aggregate of shape；
(2), the recycled aggregate after step (1) resulting drying is totally immersed in high efficiency water reducing agent for 24 hours, water-reducing agent by
In the gap that immersional wetting and capillarity can be filled up completely the regenerated coarse aggregate surface mortar after drying, obtaining inhaling has height
Recycled aggregate after imitating the drying of water-reducing agent；
The high efficiency water reducing agent is 803 high efficiency water reducing agents, inhales the Regenerated Bone after having the drying of high efficiency water reducing agent through detection
It is 6.2% that the absorptivity of high efficiency water reducing agent, which is calculated by mass percentage, in material；
(3), pulling the resulting suction of step (2) out has the recycled aggregate after the drying of high efficiency water reducing agent, at room temperature aeration-drying
It dries in the shade to reduce the functional form recycled aggregate of regeneration concrete workability gradual loss in place.
Application Example 1
Embodiment 1 it is resulting it is a kind of reduce regeneration concrete workability gradual loss functional form recycled aggregate be used for C20
The preparation of regeneration concrete, by preparation 1m3The amount of C20 regeneration concrete calculates, preparation raw material composition used and content
It is as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S95；
The recycled aggregate is that Hubei Province of partial size 5-25mm is broken into the standby recycled aggregate of shape；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
A kind of resulting functional form recycled aggregate use for reducing regeneration concrete workability gradual loss of the above embodiments 1
Specifically comprise the following steps: in the preparation process of C20 regeneration concrete
Firstly, by recycled aggregate, functional form recycled aggregate, yellow ground, the water of reduction regeneration concrete workability gradual loss
Mud, flyash, miberal powder put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains containing reduction
The C20 regeneration concrete of the functional form recycled aggregate of regeneration concrete workability gradual loss.
Using comparative examples 1
A kind of C20 regeneration concrete without containing the functional form recycled aggregate for reducing regeneration concrete workability gradual loss
Preparation, by preparing every 1m3The amount of C20 regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S95；
The recycled aggregate is that Hubei Province of partial size 5-25mm is broken into the standby recycled aggregate of shape；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
The above-mentioned C20 regeneration concrete without containing the functional form recycled aggregate for reducing regeneration concrete workability gradual loss
Preparation process specifically comprise the following steps:
Firstly, recycled aggregate, yellow ground, cement, flyash, miberal powder are put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, it is mixed to finally obtain C20 regeneration
Solidifying soil.
Above-mentioned Application Example 1 is resulting to contain the functional form recycled aggregate for reducing regeneration concrete workability gradual loss
C20 regeneration concrete and application comparative examples 1 it is resulting without containing reduce regeneration concrete workability gradual loss function
It can the initial slump (mm) of C20 regeneration concrete of type recycled aggregate, the 1h slump (mm), 3 days, 7 days, 28 days pressure resistances
Degree (MPa) see the table below:
As can be seen from the above table, in Application Example 1 using reduction regeneration concrete workability of the invention through when damage
The functional form recycled aggregate of mistake is resulting to contain the resulting functional form for reducing regeneration concrete workability gradual loss of embodiment 1
The C20 regeneration concrete of recycled aggregate, either initial slump, the 1h slump, 3 days, 7 days, compare after 28 days compression strength
Using the functional form recycled aggregate institute for not using reduction regeneration concrete workability gradual loss of the invention in comparative examples 1
The C20 regeneration without containing the resulting functional form recycled aggregate for reducing regeneration concrete workability gradual loss of embodiment 1 obtained
The corresponding performance indicator of concrete all increases, and the especially 1h slump improves 120%, analyzes its reason, it may be possible to
Due in the preparation process of C20 regeneration concrete, being added to the function of reduction regeneration concrete workability gradual loss of the invention
The resulting C20 regeneration containing the functional form recycled aggregate for reducing regeneration concrete workability gradual loss after energy type recycled aggregate
Concrete, in transportational process, due in the functional form recycled aggregate of reduction regeneration concrete workability gradual loss of the invention
It will be slow and release high efficiency water reducing agent, since high efficiency water reducing agent is from reduction regeneration concrete workability gradual loss of the invention
Functional form recycled aggregate gap in be gradually precipitated, therefore transport from mixing plant to the complete of building site in C20 regeneration concrete
In the process, high efficiency water reducing agent can compensate the mobility of C20 regeneration concrete, so that C20 regeneration concrete is defeated
Good mobility is still able to maintain after sending to building site.
Embodiment 2
A kind of functional form recycled aggregate reducing regeneration concrete workability gradual loss, passes through the side included the following steps
Method is prepared:
(1), recycled aggregate is dried controlled at 100 DEG C, to remove the moisture in the mortar voids of recycled aggregate surface,
Recycled aggregate after being dried；
The recycled aggregate is partial size 5-25mm, using the recycled aggregate of Vertical Mill technique preparation；
(2), recycled aggregate after step (1) resulting drying is totally immersed in 12h in high efficiency water reducing agent, water-reducing agent due to
Immersional wetting and capillarity can be filled up completely in the gap of the regenerated coarse aggregate surface mortar after drying, and obtaining inhaling has efficiently
Recycled aggregate after the drying of water-reducing agent；
The high efficiency water reducing agent is 803 high efficiency water reducing agents, inhales the Regenerated Bone after having the drying of high efficiency water reducing agent through detection
It is 3.3% that the absorptivity of high efficiency water reducing agent, which is calculated by mass percentage, in material；
(3), pulling the resulting suction of step (2) out has the recycled aggregate after the drying of high efficiency water reducing agent, at room temperature aeration-drying
It dries in the shade to reduce the functional form recycled aggregate of regeneration concrete workability gradual loss in place.
Application Example 2
A kind of resulting functional form recycled aggregate use for reducing regeneration concrete workability gradual loss of the above embodiments 2
In the preparation of C20 regeneration concrete, by preparation 1m3The amount of C20 regeneration concrete calculates, preparation raw material composition used and
Content is as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S105；
The recycled aggregate is partial size 5-25mm, using the recycled aggregate of Vertical Mill technique preparation；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
A kind of resulting functional form recycled aggregate use for reducing regeneration concrete workability gradual loss of the above embodiments 2
Specifically comprise the following steps: in the preparation process of C20 regeneration concrete
Firstly, by recycled aggregate, functional form recycled aggregate, yellow ground, the water of reduction regeneration concrete workability gradual loss
Mud, flyash, miberal powder put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains containing reduction
The C20 regeneration concrete of the functional form recycled aggregate of regeneration concrete workability gradual loss.
Using comparative examples 2
A kind of C20 regeneration concrete without containing the functional form recycled aggregate for reducing regeneration concrete workability gradual loss
Preparation, by preparation 1m3The amount of C20 regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S105；
The recycled aggregate is partial size 5-25mm, using the recycled aggregate of Vertical Mill technique preparation；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
The above-mentioned C20 without containing the functional form recycled aggregate for reducing regeneration concrete workability gradual loss regenerates coagulation
The preparation process of soil specifically comprises the following steps:
Firstly, recycled aggregate, yellow ground, cement, flyash, miberal powder are put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, it is mixed to finally obtain C20 regeneration
Solidifying soil.
Above-mentioned Application Example 2 is resulting to contain the functional form recycled aggregate for reducing regeneration concrete workability gradual loss
C20 regeneration concrete and the application initial slump (mm) of the resulting C20 regeneration concrete of comparative examples 2, the 1h slump
(mm), 3 days, 7 days, 28 days compression strength (MPa) see the table below:
As can be seen from the above table, in Application Example 2 using reduction regeneration concrete workability of the invention through when damage
The functional form recycled aggregate of mistake is resulting to contain the resulting functional form for reducing regeneration concrete workability gradual loss of embodiment 2
The C20 regeneration concrete of recycled aggregate, either initial slump, the 1h slump, 3 days, 7 days, compare after 28 days compression strength
Using the functional form recycled aggregate institute for not using reduction regeneration concrete workability gradual loss of the invention in comparative examples 2
The C20 regeneration without the resulting functional form recycled aggregate for reducing regeneration concrete workability gradual loss of embodiment 2 obtained is mixed
The corresponding performance indicator for coagulating soil all increases, and the especially 1h slump improves 111%.
Embodiment 3
A kind of functional form recycled aggregate reducing regeneration concrete workability gradual loss, passes through the side included the following steps
Method is prepared:
(1), regenerated coarse aggregate is dried controlled at 105 DEG C, removes the moisture in the mortar voids of recycled aggregate surface,
Recycled aggregate after being dried；
The recycled aggregate is partial size 5-25mm, rinses the recycled aggregate of preparation after Hubei Province is broken through clear water；
(2), the recycled aggregate after step (1) resulting drying is totally immersed in 1h in high efficiency water reducing agent, efficient diminishing
Agent is inhaled since immersional wetting and capillarity can be filled up completely in the gap of the regenerated coarse aggregate surface mortar after drying
Recycled aggregate after having the drying of high efficiency water reducing agent；
The high efficiency water reducing agent is 803 high efficiency water reducing agents, inhales the Regenerated Bone after having the drying of high efficiency water reducing agent through detection
It is 4.2% that the absorptivity of high efficiency water reducing agent, which is calculated by mass percentage, in material；
(3), pulling the resulting suction of step (2) out has the recycled aggregate after the drying of high efficiency water reducing agent, at room temperature aeration-drying
It dries in the shade to reduce the functional form recycled aggregate of regeneration concrete workability gradual loss in place.
Application Example 3
A kind of resulting functional form recycled aggregate use for reducing regeneration concrete workability gradual loss of the above embodiments 3
In the preparation of C30 regeneration concrete, by preparation 1m3The amount of C30 regeneration concrete calculates, preparation raw material composition used and
Content is as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S115；
The recycled aggregate is partial size 5-25mm, rinses the recycled aggregate of preparation after Hubei Province is broken through clear water；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
A kind of resulting functional form recycled aggregate use for reducing regeneration concrete workability gradual loss of the above embodiments 3
Specifically comprise the following steps: in the preparation process of C30 regeneration concrete
Firstly, by recycled aggregate, functional form recycled aggregate, yellow ground, the water of reduction regeneration concrete workability gradual loss
Mud, flyash, miberal powder put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains containing reduction
The C30 regeneration concrete of the functional form recycled aggregate of regeneration concrete workability gradual loss.
Using comparative examples 3
It is a kind of without the resulting functional form recycled aggregate for reducing regeneration concrete workability gradual loss of embodiment 3
The preparation of C30 regeneration concrete, by preparation 1m3Without the resulting reduction regeneration concrete workability gradual loss of embodiment 3
The amount of the C30 regeneration concrete of functional form recycled aggregate calculates, and preparation raw material composition used and content are as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S115；
The recycled aggregate is partial size 5-25mm, rinses the recycled aggregate of preparation after Hubei Province is broken through clear water；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
The above-mentioned functional form recycled aggregate without the resulting reduction regeneration concrete workability gradual loss of embodiment 3
The preparation process of C30 regeneration concrete specifically comprises the following steps:
Firstly, recycled aggregate, yellow ground, cement, flyash, miberal powder are put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains without containing drop
The C30 regeneration concrete of the functional form recycled aggregate of low regeneration concrete workability gradual loss.
As can be seen from the above table, in Application Example 3 using reduction regeneration concrete workability of the invention through when damage
The functional form recycled aggregate of mistake is resulting to contain the resulting functional form for reducing regeneration concrete workability gradual loss of embodiment 3
The C30 regeneration concrete of recycled aggregate, either initial slump, the 1h slump, 3 days, 7 days, compare after 28 days compression strength
Using the functional form recycled aggregate institute for not using reduction regeneration concrete workability gradual loss of the invention in comparative examples 3
The C30 regeneration without the resulting functional form recycled aggregate for reducing regeneration concrete workability gradual loss of embodiment 3 obtained is mixed
The corresponding performance indicator for coagulating soil all increases, and the especially 1h slump improves 150%.
In conclusion a kind of functional form recycled aggregate of reduction regeneration concrete workability gradual loss of the invention, by
In preparation process, it is added to the functional form recycled aggregate of reduction regeneration concrete workability gradual loss of the invention, transport
In the process, it will be slow in the functional form recycled aggregate due to reducing regeneration concrete workability gradual loss and release efficient diminishing
Agent is transported in regeneration concrete from mixing plant since high efficiency water reducing agent is gradually precipitated from the gap of recycled aggregate
Into the overall process in building site, high efficiency water reducing agent can compensate the mobility of concrete, so that regeneration concrete is defeated
Good mobility is still able to maintain after sending to building site.Therefore the Slump Time losing of Large of regeneration concrete can be finally effectively reduced,
The especially 1h slump is up to 180-200mm, i.e., than being added without reduction regeneration concrete workability gradual loss of the invention
The 1h slump of the resulting regeneration concrete of functional form recycled aggregate improves 111-150%, therefore it is mixed to effectively reduce regeneration
Solidifying soil workability gradual loss, and the early strength of resulting regeneration concrete and 28 days compression strength are preferable, early strength
For 13.9-15.2MPa, 28 days compression strength is 24.8-25.7MPa.
The above content is only basic explanation and preferred embodiment of the invention, and is appointed made by technical solution according to the present invention
What equivalent transformation, is within the scope of protection of the invention.
Claims (9)
1. a kind of preparation method for the functional form recycled aggregate for reducing regeneration concrete workability gradual loss, it is characterised in that tool
Body includes the following steps:
(1), recycled aggregate is dried controlled at 105 ± 5 DEG C, removes the moisture in the mortar voids of recycled aggregate surface, obtains
Recycled aggregate after to drying；
The recycled aggregate is that partial size is 5-25mm, using the preparation of Vertical Mill technique or using Hubei Province to be broken into shape standby or adopt
The recycled aggregate of preparation is rinsed after being broken into type with Hubei Province through clear water；
(2), the recycled aggregate after step (1) resulting drying is totally immersed in 1 in high efficiency water reducing agent~for 24 hours, obtaining inhaling has
Recycled aggregate after the drying of high efficiency water reducing agent；
The high efficiency water reducing agent is the Polycarboxylic Superplasticizer that national standard GB8076-2008 " concrete admixture " defines,
Its water-reducing rate is 25-50%；
(3), pull out step (2) inhale have the recycled aggregate after the drying of high efficiency water reducing agent, dry in the shade at aeration-drying at room temperature to get
Reduce the functional form recycled aggregate of regeneration concrete workability gradual loss.
2. a kind of preparation of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as described in claim 1
Method, it is characterised in that recycled aggregate described in step (1) is the production of Shanghai Jian Gong Materials Co., Ltd；
High efficiency water reducing agent described in step (2) is 803 high efficiency water reducing agents.
3. a kind of function for reduction regeneration concrete workability gradual loss that preparation method as claimed in claim 1 or 2 obtains
It can type recycled aggregate.
4. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 3 is for again
The preparation of raw type concrete, it is characterised in that:
By preparation 1m3The amount of regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The cement is P.O42.5 ordinary portland cement；
The flyash is II flyash for meeting national Specification；
The miberal powder is ground granulated blast furnace slag, grade S95, S105 or S115；
The yellow ground is common yellow ground, fineness modulus 2.3-3.0；
The high efficiency water reducing agent is the Polycarboxylic Superplasticizer that national standard GB8076-2008 " concrete admixture " defines,
Water-reducing rate is 25-50%；
Specific step is as follows for its preparation process:
Firstly, by recycled aggregate, functional form recycled aggregate, yellow ground, cement, the powder of reduction regeneration concrete workability gradual loss
Coal ash, miberal powder put into blender, stir and evenly mix；
Then, tap water, high efficiency water reducing agent are added under stirring condition, continues to be stirred until homogeneous, finally obtains and is regenerated containing reduction
The regeneration concrete of the functional form recycled aggregate of workability of concrete gradual loss.
5. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 4 is for again
The preparation of raw type concrete, it is characterised in that the high efficiency water reducing agent is 803 high efficiency water reducing agents.
6. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 3 is used for
The preparation of C20 regenerative concrete, it is characterised in that:
By preparation 1m3The amount of C20 regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The miberal powder is ground granulated blast furnace slag, grade S95, S105 or S115；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
7. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 6 is used for
The preparation of C20 regenerative concrete, it is characterised in that:
By preparation 1m3The amount of C20 regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The miberal powder is ground granulated blast furnace slag, grade S95；
The recycled aggregate is that Hubei Province of partial size 5-25mm is broken into the standby recycled aggregate of shape.
8. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 6 is used for
The preparation of C20 regenerative concrete, it is characterised in that:
By preparation 1m3The amount of C20 regeneration concrete calculates, and preparation raw material composition used and content are as follows:
The miberal powder is ground granulated blast furnace slag, grade S105；
The recycled aggregate is partial size 5-25mm, using the recycled aggregate of Vertical Mill technique preparation.
9. a kind of functional form recycled aggregate for reducing regeneration concrete workability gradual loss as claimed in claim 3 is used for
The preparation of C30 regenerative concrete, by preparation 1m3The amount of C30 regeneration concrete calculates, preparation raw material composition used and
Content is as follows:
The miberal powder is ground granulated blast furnace slag, grade S95, S105 or S115；
The high efficiency water reducing agent is 803 high efficiency water reducing agents.
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