CN109761559A - The composite material and preparation method with monitoring is conserved for bridge concrete structure - Google Patents
The composite material and preparation method with monitoring is conserved for bridge concrete structure Download PDFInfo
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- CN109761559A CN109761559A CN201910145627.9A CN201910145627A CN109761559A CN 109761559 A CN109761559 A CN 109761559A CN 201910145627 A CN201910145627 A CN 201910145627A CN 109761559 A CN109761559 A CN 109761559A
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Abstract
The present invention relates to a kind of composite material and preparation methods conserved for bridge concrete structure with monitoring, the composite material is made of A, B two-component, component A includes portland cement, quartz sand, carbon fiber, miberal powder, bentonite and water-reducing agent, and B component includes carbon nanotube, silicon ash, dispersing agent, defoaming agent and water.The composite material has excellent buckle resistance energy, deformation adaptability, good interface performance and alert and resourceful characteristic, and can realize the real-time monitoring of weak area configuration state, can be applied to maintenance and the monitoring field of bridge tunnel.
Description
Technical field
The present invention relates to belong to the maintenance of bridge concrete structure and monitoring technical field, and in particular to a kind of mixed for bridge
The composite material and preparation method of Xtah Crude Clay structure maintenance and monitoring.
Background technique
In concrete-bridge construction project, always exists and lay particular stress on structural bearing capacity design, ignore military service durability Design
Mistake theory lacks effective maintenance, maintenance and monitoring to engineering structure, so that in-service concrete bridge after bridge is built up in addition
The endurance issues of girder construction are increasingly prominent, usually exist concrete reinforcement corrosion, cover to reinforcement carbonization, Chloride Attack,
The durabilities such as freeze-thaw damage deteriorate problem, cause concrete cracking to peel off, leak the diseases such as muscle.Up to now, China about has more than
100000 bridge block safeties and durability are insufficient.There is the relationship that intercouples between bridge durability and safety, structure is durable
Property deterioration be bound to cause safety reduction.If Bridge Management & Maintenance unit pays little attention to endurance issues, the later period is on the one hand caused to be supported
Shield maintenance cost dramatically increases, and on the other hand since durability deficiency jeopardizes engineering safety, bridge structure is caused to be destroyed even
It collapses, causes casualties and economic loss.
The maintenance technology in the field or product are not mature enough at present, flexibility, cooperative transformation ability, interface adaptability compared with
Difference, can not structure and materials behavior after real-time monitoring maintenance, cause after maintenance in the short period (usually 3 ~ 5 years or so),
Bridge concrete structure is in outside environmental elements (load stress, CO2, villaumite, water etc.) under repeated action, there have been different journeys
The secondary lasting hazard of degree, seriously affects the service performance of bridge.
Summary of the invention
It is conserved and the composite material of monitoring and its preparation the object of the present invention is to provide a kind of for bridge concrete structure
Method, it is ensured that the safety in utilization of bridge concrete structure utmostly improves the durability of bridge structure, extends it and is on active service the longevity
The period is ordered, maintenance and monitoring expense in works life cycle management are reduced.
The technical scheme adopted by the invention is as follows:
The composite material with monitoring is conserved for bridge concrete structure, it is characterised in that:
The composite material is made of A, B two-component, and component A is made of the substance of following parts by weight:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
B component is made of the substance of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water.
Carbon fiber described in component A is selected from one of T300 type or SYT45 type carbon fiber.
Portland cement described in component A is one of P.O 42.5 or P.O 42.5R ordinary portland cement；
Quartz sand described in component A is the middle sand that fineness modulus is 2.2 ~ 2.7；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A be calcium sulphoaluminate class swelling agent, one in Sino-t60 type or ZWL type swelling agent
Kind；
Water-reducing agent described in component A be naphthalene sulfonate water-reducing agent, one in II type of ZWL- or HSP-NGX type water-reducing agent
Kind.
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000.
Silicon ash described in B component is high activity silicon ash, and specific surface area is not less than 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is selected from 101 type organic silicon defoamer of ZK-XP.
The preparation method with the composite material monitored is conserved for bridge concrete structure, it is characterised in that:
It is realized by following steps:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made；
Step 3: B component raw material is weighed by the proportion of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water；
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made；
Step 5: being poured slowly into component A material in step 2 for B component material in step 4, by two component materials in blender
Material is stirred until homogeneous mixing and can be prepared by composite material, and mixing time is no less than 3min；
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides, connection electricity before step 5 composite material initial set
Source, potentiometer, divider resistance, can normal use after 7 ~ 28d of conventional maintenance.
Carbon fiber described in component A is selected from one of T300 type or SYT45 type carbon fiber.
Portland cement described in component A is one of P.O 42.5 or P.O 42.5R ordinary portland cement；
Quartz sand described in component A is the middle sand that fineness modulus is 2.2 ~ 2.7；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A be calcium sulphoaluminate class swelling agent, one in Sino-t60 type or ZWL type swelling agent
Kind；
Water-reducing agent described in component A be naphthalene sulfonate water-reducing agent, one in II type of ZWL- or HSP-NGX type water-reducing agent
Kind.
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000.
Silicon ash described in B component is high activity silicon ash, and specific surface area is not less than 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is selected from 101 type organic silicon defoamer of ZK-XP.
The invention has the following advantages that
(1) physical and mechanical property of composite material is excellent, ungauged regions, high intensity, high cracking resistance, with old concrete substrate cohesive force
By force, especially buckle resistance can protrude, and under bridge course under cyclic loading, have excellent deformation adaptability.
(2) excellent durability of composite material, water permeability resistance, freeze thawing resistance cyclicity, chlorine ion erosion and resistance rust
Rust-preventing characteristic is stronger, and service life is higher than the structure design time limit.
(3) composite material has alert and resourceful characteristic, in the pre-buried electrode in composite material two sides before initial set, connects power supply, voltage
The equipment such as meter, divider resistance are, it can be achieved that conserve position load situation and internal injury situation to bridge concrete structure
Long-term real-time monitoring.
(4) application property of composite material is excellent, and can manually plaster also mechanically spraying, and work progress is fallen without stream, without branch
Mould, construction efficiency are high.
Specific embodiment
The present invention will be described in detail With reference to embodiment.
The generally existing concrete reinforcement corrosion of bridge concrete structure, cover to reinforcement carbonization, Chloride Attack, freeze thawing are broken
The durabilities such as bad deteriorate problem, cause concrete cracking to peel off, leak the diseases such as muscle, jeopardize engineering safety.It is commonly used
Traditional curing material, deformation adaptability, the problems such as flexibility is bad, the old and new's Material Physics compatibility is poor, are prominent, often
Lead to maintenance failure, disease aggravation.The present invention relates to a kind of composite materials conserved for bridge concrete structure with monitoring, should
Composite material has excellent buckle resistance energy, deformation adaptability, good interface performance and alert and resourceful characteristic, and can realize
The real-time monitoring of weak area configuration state can be applied to maintenance and the monitoring field of bridge tunnel.
Above-mentioned to be made of for the maintenance of bridge concrete structure and the composite material of monitoring A, B two-component, component A is by following
The substance of parts by weight is made:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
B component is made of the substance of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water.
Wherein:
Carbon fiber described in component A is selected from one of T300 type or SYT45 type carbon fiber；Silicate described in component A
Cement is one of P.O 42.5 or P.O 42.5R ordinary portland cement；Quartz sand described in component A is fineness modulus
For 2.2 ~ 2.7 middle sand；Miberal powder described in component A is ground granulated blast furnace slag；Bentonite described in component A is sulphur aluminic acid
Calcium class swelling agent is selected from one of Sino-t60 type or ZWL type swelling agent；Water-reducing agent described in component A is naphthalene sulfonate
Water-reducing agent is selected from one of II type of ZWL- or HSP-NGX type water-reducing agent.
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000；Silicon described in B component
Ash is high activity silicon ash, and specific surface area is not less than 20000m2/kg；Dispersing agent described in B component is nanometer silica gel；In B component
The defoaming agent is selected from 101 type organic silicon defoamer of ZK-XP；Water described in B component is domestic water.
The above-mentioned preparation method conserved for bridge concrete structure with the composite material monitored, is realized by following steps:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made；
Step 3: B component raw material is weighed by the proportion of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water；
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made；
Step 5: being poured slowly into component A material in step 2 for B component material in step 4, by two component materials in blender
Material is stirred until homogeneous mixing and can be prepared by composite material, and mixing time is no less than 3min；
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides, connection electricity before step 5 composite material initial set
Source, potentiometer, divider resistance, can normal use after 7 ~ 28d of conventional maintenance.
Concrete structure material after maintenance under stress state, is in elastic stage, and volume resistivity can be answered with pressure
The increase of power and reduce, there is good correlations between resistance change rate and compression increment.Implement concrete structure maintenance
When with monitoring, the volume resistivity at maintenance position is measured using two-probe method: in the stage that pours that two stainless steel electrodes are pre-buried
Enter composite material both ends, then connect D.C. regulated power supply, voltmeter, ammeter and divider resistance with conducting wire, after conserving 28d
Into normal maintenance and monitoring state, to the volume resistivity change rate and stress of the composite material in the case where structural stress acts on
Correlation curve is demarcated, by survey calculation real-time volume resistivity, realize to weak area structural stress state in real time from
Monitoring.
Embodiment 1:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
330 parts of portland cement
515 parts of quartz sand
7 parts of carbon fiber
32 parts of miberal powder
30 parts of bentonite
4.5 parts of water-reducing agent
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made.
Step 3: B component raw material is weighed by the proportion of following parts by weight:
18 parts of carbon nanotube
20 parts of silicon ash
9 parts of dispersing agent
9 parts of defoaming agent
105 parts of water
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made.
Step 5: B component material in step 4 is poured slowly into component A material in step 2, by two groups in blender
Dividing material to be stirred until homogeneous mixing can be prepared by composite material, and mixing time is no less than 3min.
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides before step 5 composite material initial set, even
The equipment such as power supply, potentiometer, divider resistance are connect, it can normal use after 7 ~ 28d of conventional maintenance.
Wherein:
Portland cement described in component A is 42.5 ordinary portland cement of P.O；
Quartz sand described in component A is the middle sand that fineness modulus is 2.4；
Carbon fiber described in component A is T300 type carbon fiber；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A is Sino-t60 type calcium sulphoaluminate class swelling agent；
Water-reducing agent described in component A is HSP-NGX type naphthalene sulfonate water-reducing agent；
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000；
Silicon ash described in B component is high activity silicon ash, specific surface area 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is 101 type organic silicon defoamer of ZK-XP；
Water described in B component is domestic water.
Embodiment 2:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
310 parts of portland cement
650 parts of quartz sand
5 parts of carbon fiber
45 parts of miberal powder
40 parts of bentonite
4 parts of water-reducing agent
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made.
Step 3: B component raw material is weighed by the proportion of following parts by weight:
12 parts of carbon nanotube
15 parts of silicon ash
5 parts of dispersing agent
5 parts of defoaming agent
90 parts of water
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made.
Step 5: B component material in step 4 is poured slowly into component A material in step 2, by two groups in blender
Dividing material to be stirred until homogeneous mixing can be prepared by composite material, and mixing time is no less than 3min.
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides before step 5 composite material initial set, even
The equipment such as power supply, potentiometer, divider resistance are connect, it can normal use after 7 ~ 28d of conventional maintenance.
Wherein:
Portland cement described in component A is 42.5 ordinary portland cement of P.O；
Quartz sand described in component A is the middle sand that fineness modulus is 2.4；
Carbon fiber described in component A is SYT45 type carbon fiber；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A is Sino-t60 type calcium sulphoaluminate class swelling agent；
Water-reducing agent described in component A is HSP-NGX type naphthalene sulfonate water-reducing agent；
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000；
Silicon ash described in B component is high activity silicon ash, specific surface area 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is 101 type organic silicon defoamer of ZK-XP；
Water described in B component is domestic water.
Embodiment 3:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
350 parts of portland cement
700 parts of quartz sand
3 parts of carbon fiber
30 parts of miberal powder
35 parts of bentonite
5 parts of water-reducing agent
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made.
Step 3: B component raw material is weighed by the proportion of following parts by weight:
12 parts of carbon nanotube
12 parts of silicon ash
5 parts of dispersing agent
5 parts of defoaming agent
110 parts of water
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made.
Step 5: B component material in step 4 is poured slowly into component A material in step 2, by two groups in blender
Dividing material to be stirred until homogeneous mixing can be prepared by composite material, and mixing time is no less than 3min.
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides before step 5 composite material initial set, even
The equipment such as power supply, potentiometer, divider resistance are connect, it can normal use after 7 ~ 28d of conventional maintenance.
Wherein:
Portland cement described in component A is 42.5 ordinary portland cement of P.O；
Quartz sand described in component A is the middle sand that fineness modulus is 2.7；
Carbon fiber described in component A is T300 type carbon fiber；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A is ZWL type calcium sulphoaluminate class swelling agent；
Water-reducing agent described in component A is HSP-NGX type naphthalene sulfonate water-reducing agent；
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000；
Silicon ash described in B component is high activity silicon ash, specific surface area 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is 101 type organic silicon defoamer of ZK-XP；
Water described in B component is domestic water.
The contents of the present invention are not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And to any equivalent transformation that technical solution of the present invention is taken, all are covered by the claims of the invention.
Claims (10)
1. conserving the composite material with monitoring for bridge concrete structure, it is characterised in that:
The composite material is made of A, B two-component, and component A is made of the substance of following parts by weight:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
B component is made of the substance of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water.
2. the composite material according to claim 1 conserved for bridge concrete structure with monitoring, it is characterised in that:
Carbon fiber described in component A is selected from one of T300 type or SYT45 type carbon fiber.
3. the composite material according to claim 1 conserved for bridge concrete structure with monitoring, it is characterised in that:
Portland cement described in component A is one of P.O 42.5 or P.O 42.5R ordinary portland cement；
Quartz sand described in component A is the middle sand that fineness modulus is 2.2 ~ 2.7；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A be calcium sulphoaluminate class swelling agent, one in Sino-t60 type or ZWL type swelling agent
Kind；
Water-reducing agent described in component A be naphthalene sulfonate water-reducing agent, one in II type of ZWL- or HSP-NGX type water-reducing agent
Kind.
4. the composite material according to claim 1 conserved for bridge concrete structure with monitoring, it is characterised in that:
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000.
5. the composite material according to claim 1 conserved for bridge concrete structure with monitoring, it is characterised in that:
Silicon ash described in B component is high activity silicon ash, and specific surface area is not less than 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is selected from 101 type organic silicon defoamer of ZK-XP.
6. conserving the preparation method with the composite material monitored for bridge concrete structure, it is characterised in that:
It is realized by following steps:
Step 1: component A raw material is weighed by the proportion of following parts by weight:
300 ~ 350 parts of portland cement；
550 ~ 700 parts of quartz sand；
3 ~ 10 parts of carbon fiber；
25 ~ 45 parts of miberal powder；
30 ~ 50 parts of bentonite；
3 ~ 7 parts of water-reducing agent；
Step 2: portland cement, carbon fiber, miberal powder, bentonite, water-reducing agent are put into blender by predetermined ratio and are uniformly stirred
2min is mixed, quartz sand 1 ~ 2min of dry mixing is placed into, until siccative mixture stirs, component A material is made；
Step 3: B component raw material is weighed by the proportion of following parts by weight:
10 ~ 25 parts of carbon nanotube；
10 ~ 20 parts of silicon ash；
3 ~ 12 parts of dispersing agent；
3 ~ 12 parts of defoaming agent；
90 ~ 110 parts of water；
Step 4: carbon nanotube and silicon ash are added to the water, then add dispersing agent and defoaming agent, and mixed liquor is placed in ultrasonic disperse
In equipment, 60 ~ 90min of ultrasonic disperse is mixed, B component material is made；
Step 5: being poured slowly into component A material in step 2 for B component material in step 4, by two component materials in blender
Material is stirred until homogeneous mixing and can be prepared by composite material, and mixing time is no less than 3min；
Step 6: when implementing concrete structure maintenance, in the pre-buried electrode in its two sides, connection electricity before step 5 composite material initial set
Source, potentiometer, divider resistance, can normal use after 7 ~ 28d of conventional maintenance.
7. the preparation method according to claim 6 conserved for bridge concrete structure with the composite material monitored,
It is characterized in that:
Carbon fiber described in component A is selected from one of T300 type or SYT45 type carbon fiber.
8. the preparation method according to claim 6 conserved for bridge concrete structure with the composite material monitored,
It is characterized in that:
Portland cement described in component A is one of P.O 42.5 or P.O 42.5R ordinary portland cement；
Quartz sand described in component A is the middle sand that fineness modulus is 2.2 ~ 2.7；
Miberal powder described in component A is ground granulated blast furnace slag；
Bentonite described in component A be calcium sulphoaluminate class swelling agent, one in Sino-t60 type or ZWL type swelling agent
Kind；
Water-reducing agent described in component A be naphthalene sulfonate water-reducing agent, one in II type of ZWL- or HSP-NGX type water-reducing agent
Kind.
9. the preparation method according to claim 6 conserved for bridge concrete structure with the composite material monitored,
It is characterized in that:
Carbon nanotube described in B component is multi-walled carbon nanotube, and draw ratio is 100 ~ 1000.
10. the preparation method according to claim 6 conserved for bridge concrete structure with the composite material monitored,
It is characterized in that:
Silicon ash described in B component is high activity silicon ash, and specific surface area is not less than 20000m2/kg；
Dispersing agent described in B component is nanometer silica gel；
Defoaming agent described in B component is selected from 101 type organic silicon defoamer of ZK-XP.
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| CN111995314A (en) * | 2020-08-26 | 2020-11-27 | 山东交通学院 | Method for bridge detection and monitoring and composite material used in method |
| CN111995314B (en) * | 2020-08-26 | 2021-12-10 | 山东交通学院 | Method for bridge detection and monitoring and composite material used in method |
| CN112500081A (en) * | 2020-12-21 | 2021-03-16 | 湖北工业大学 | Self-monitoring cement-based composite material and preparation method thereof |
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