CN103964784A - Cement mortar for repairing corrosion damage of concrete structure and preparation method of cement mortar - Google Patents
Cement mortar for repairing corrosion damage of concrete structure and preparation method of cement mortar Download PDFInfo
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- CN103964784A CN103964784A CN201410190246.XA CN201410190246A CN103964784A CN 103964784 A CN103964784 A CN 103964784A CN 201410190246 A CN201410190246 A CN 201410190246A CN 103964784 A CN103964784 A CN 103964784A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to cement mortar for repairing corrosion damage of a concrete structure and a preparation method of the cement mortar. At present, a cement-based mortar repair material which is generally used aiming at the concrete corrosion damage lacks pertinence and effectiveness for corrosion damage, and a repair failure problem still exists. The method comprises the following steps: dissolving a water reducing agent and a corrosion inhibitor into mixing water, and stirring and standing without precipitation; putting Portland cement, flyash, silica fume, quartz sand and an expanding agent into a stirring machine in proportion for dry stirring, and then adding the liquid for mixing and stirring for 2-3 minutes; adding the mixing water for stirring to obtain the cement mortar. The compound corrosion inhibitor adopted by the invention is good in cement adaptability, has good compatibility with additives such as the water reducing agent and the expanding agent, has no adverse effect on the strength of materials, and can improve the mobility of mixtures. The mortar has high matrix density, good antiseptic and corrosion-inhibiting capacity and good bonding performance, volume stability and constructability.
Description
Technical field
the invention belongs to building material technical field, be specifically related to a kind of sand-cement slurry of repairing for concrete structure Damage of Corroded and preparation method thereof.
Background technology
Steel Concrete is the class material of construction being most widely used in highway, bridge and Industrial buildings engineering, and along with structured material Years Of Service increases, the deteriorated problem of weather resistance highlights day by day.Concrete durability statistics shows, Damage of Corroded Reinforced Concrete is main lasting hazard, and it exceedes other disease such as freeze-thaw cycle, sulphate attack to structure influence degree.The deteriorated mode of Damage of Corroded is the expansion stress that corrosion product produces; reinforcing bar and concrete adhesive property are reduced; expansion stress can cause concrete surface generation to be peeled off along muscle crack or cover cracking simultaneously; external agency is easier to invade inside concrete; cause corrosion speed of reaction to be multiplied, structural bearing capacity is brought to unpredicted impact.For repair materials and the technical research of Damage of Corroded Reinforced Concrete, become the direction of paying close attention to of concrete structure reparation and field of reinforcement.
Singularity based on concrete Damage of Corroded and complicacy, propose following performance requirement to repair materials:
(1) excellent resistance rust antiseptic property: rebar passivation film stable existence, inhibition corrosion development after repairing;
(2) higher degree of compactness: effectively stop Cl
-, CO
2and H
2the intrusion of the objectionable impuritiess such as O;
(3) good volume stability: shrinking percentage is less, do not produce shrinkage cracking between mortar and substrate concrete;
(4) higher cohesive strength: can closely and not come off with substrate concrete bonding;
(5) good mechanical property: ultimate compression strength is not less than substrate concrete and has certain toughness;
(6) in the time that different component, different sites are repaired, mortar mobility has larger setting range.
Repair materials need performance index up to standard be 28d ultimate compression strength >=35MPa, 28d interface binding intensity >=1.5MPa, 28d shrinking percentage≤1%,, mortar mixture denseness is adjustable between 60 ~ 90mm, reinforcing bar mortar polarized potential stable.
The cement-based mortar repair materials that China for concrete Damage of Corroded and is generally used now, resistance to compression, the mechanical properties such as folding strength are outstanding, but for the special Damage of Corroded feature of concrete, material property lacks specific aim and validity, repairing effect is only that protective layer replacement covers and strength enhancing, and corrosion-prevention rust-resistance, the reparation Problem of Failure of the initiations such as physical compatibility is not good still exists, comprehensive repair effect can not reach re-set target, and part resistance rust composition is containing poisonous, objectionable constituent, be there is to potential threat in HUMAN HEALTH and environment protection, and high containing rust inhibitor repair materials price, contain effectively carrying out of corrosion concrete repair.
Summary of the invention
The object of this invention is to provide a kind of sand-cement slurry of repairing for concrete structure Damage of Corroded and preparation method thereof, can be used for concrete local Damage of Corroded reparation, there is more excellent corrosion-prevention rust-resistance and volume stability.
The technical solution adopted in the present invention is:
The sand-cement slurry of repairing for concrete structure Damage of Corroded, is characterized in that:
Component by following weight part is made:
Silicate cement 300-330 part;
Flyash 30-40 part;
Silicon ash 20-30 part;
Quartz sand 550-600 part;
Swelling agent 30-40 part;
Water reducer 4-6 part;
Rust inhibitor 1-3 part;
And account for the mixing water of compound gross weight umber 11 ~ 15%.
Described silicate cement is P.O 42.5 or P.O 42.5R ordinary Portland cement.
Described flyash is I level flyash.
Described silicon ash is activated grammite.
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand.
Described swelling agent is calcium sulphoaluminate class swelling agent, is selected from Sino-t60 type or ZWL type swelling agent.
Described water reducer is naphthalenesulfonate water reducer, is selected from ZWL-II type or HSP-NGX type water reducer.
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
The preparation method of the sand-cement slurry of repairing for concrete structure Damage of Corroded, is characterized in that:
Realized by following steps:
Step 1: take raw material by the proportioning of following weight part:
Silicate cement 300-330 part;
Flyash 30-40 part;
Silicon ash 20-30 part;
Quartz sand 550-600 part;
Swelling agent 30-40 part;
Water reducer 4-6 part;
Rust inhibitor 1-3 part;
And account for the mixing water of compound gross weight umber 11 ~ 15%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes;
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
Described silicate cement is P.O 42.5 or P.O 42.5R ordinary Portland cement;
Described flyash is I level flyash;
Described silicon ash is activated grammite;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent is calcium sulphoaluminate class swelling agent, is selected from Sino-t60 type or ZWL type swelling agent;
Described water reducer is naphthalenesulfonate water reducer, is selected from ZWL-II type or HSP-NGX type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
The present invention has the following advantages:
The rust inhibitor adopting in the present invention, cement adaptability is good, and the admixture such as water reducer, swelling agent between there is good consistency, after mixing sand-cement slurry, the strength of materials is had no adverse effect, and can be in the mobility of to a certain degree improving sand-cement slurry mixture.The mortar matrix density of repair materials of the present invention is higher, corrosion-prevention rust-resistance ability is better, has good adhesive property, volume stability and application property, can significantly reduce Cl
-, CO
2the erosion degree of the objectionable impurities such as gas, moisture, improve the resistivity of concrete substrate and the corrosion potential of Corrosion Reinforcement, be a kind of desirable corrosion concrete structure repair materials, can be widely used in the Damage of Corroded reparation of the concrete workses such as highway, bridge and Industrial buildings.
Embodiment
Below in conjunction with embodiment, the present invention will be described in detail.
The preparation method of the sand-cement slurry of repairing for concrete structure Damage of Corroded involved in the present invention, is realized by following steps:
Step 1: take raw material by the proportioning of following weight part:
Silicate cement 300-330 part;
Flyash 30-40 part;
Silicon ash 20-30 part;
Quartz sand 550-600 part;
Swelling agent 30-40 part;
Water reducer 4-6 part;
Rust inhibitor 1-3 part;
And account for the mixing water of compound gross weight umber 11 ~ 15%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes;
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
Wherein:
Described silicate cement is for meeting P.O 42.5 or the P.O 42.5R ordinary Portland cement of GB/T 175-2007 " silicate cement, ordinary Portland cement " regulation;
Described flyash is for meeting the I level flyash of GB/T 1596-2005 " for the flyash of cement and concrete " regulation;
Described silicon ash is for meeting the activated grammite of GB/T 27690-2011 " mortar and the reinforcement of concrete silicon ash " regulation;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent, for meeting the calcium sulphoaluminate class swelling agent of GB 23439-2009 " cement expansive material " regulation, can be chosen Sino-t60 type or ZWL type swelling agent;
Described water reducer, for meeting the naphthalenesulfonate water reducer of GB 8076-2008 " concrete admixture " regulation, can be chosen ZWL-II type or HSP-NGX type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
Embodiment 1:
Step 1: take raw material by the proportioning of following weight part:
300 parts of silicate cements;
40 parts, flyash;
20 parts of silicon ashes;
600 parts of quartz sands;
30 parts of swelling agents;
6 parts of water reducers;
1 part of rust inhibitor;
And account for the mixing water of compound gross weight umber 15%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes.
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
Wherein:
Described silicate cement is for meeting P.O 42.5 ordinary Portland cements of GB/T 175-2007 " silicate cement, ordinary Portland cement " regulation;
Described flyash is for meeting the I level flyash of GB/T 1596-2005 " for the flyash of cement and concrete " regulation;
Described silicon ash is for meeting the activated grammite of GB/T 27690-2011 " mortar and the reinforcement of concrete silicon ash " regulation;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent is for meeting the calcium sulphoaluminate class swelling agent of GB 23439-2009 " cement expansive material " regulation, as Sino-t60 type swelling agent;
Described water reducer is for meeting the naphthalenesulfonate water reducer of GB 8076-2008 " concrete admixture " regulation, as ZWL-II type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
This example gained sand-cement slurry the performance test results is as follows:
(1) denseness: 65mm
(2) 28d shrinking percentage: 0.06%
(3) 28d ultimate compression strength: 49MPa
(4) 28d folding strength: 9.5MPa
(5) 28d cohesive strength: 2.34MPa
(6) 0 ~ 30min polarized potential: 735 ~ 635mV
(7) steel bar corrosion: harmless.
Embodiment 2:
Step 1: take raw material by the proportioning of following weight part:
315 parts of silicate cements;
35 parts, flyash;
25 parts of silicon ashes;
575 parts of quartz sands;
35 parts of swelling agents;
5 parts of water reducers;
2 parts of rust inhibitors;
And account for the mixing water of compound gross weight umber 13%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes.
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
Wherein:
Described silicate cement is for meeting P.O 42.5 ordinary Portland cements of GB/T 175-2007 " silicate cement, ordinary Portland cement " regulation;
Described flyash is for meeting the I level flyash of GB/T 1596-2005 " for the flyash of cement and concrete " regulation;
Described silicon ash is for meeting the activated grammite of GB/T 27690-2011 " mortar and the reinforcement of concrete silicon ash " regulation;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent is for meeting the calcium sulphoaluminate class swelling agent of GB 23439-2009 " cement expansive material " regulation, as Sino-t60 type swelling agent;
Described water reducer is for meeting the naphthalenesulfonate water reducer of GB 8076-2008 " concrete admixture " regulation, as ZWL-II type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
This example gained sand-cement slurry the performance test results is as follows:
(1) denseness: 81mm
(2) 28d shrinking percentage: 0.04%
(3) 28d ultimate compression strength: 43.2MPa
(4) 28d folding strength: 8.0MPa
(5) 28d cohesive strength: 2.01MPa
(6) 0 ~ 30min polarized potential: 694 ~ 570mV
(7) steel bar corrosion: harmless.
Embodiment 3:
Step 1: take raw material by the proportioning of following weight part:
330 parts of silicate cements;
30 parts, flyash;
30 parts of silicon ashes;
550 parts of quartz sands;
40 parts of swelling agents;
4 parts of water reducers;
3 parts of rust inhibitors;
And account for the mixing water of compound gross weight umber 11%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes.
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
Wherein:
Described silicate cement is for meeting the P.O 42.5R ordinary Portland cement of GB/T 175-2007 " silicate cement, ordinary Portland cement " regulation;
Described flyash is for meeting the I level flyash of GB/T 1596-2005 " for the flyash of cement and concrete " regulation;
Described silicon ash is for meeting the activated grammite of GB/T 27690-2011 " mortar and the reinforcement of concrete silicon ash " regulation;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent is for meeting the calcium sulphoaluminate class swelling agent of GB 23439-2009 " cement expansive material " regulation, as ZWL type swelling agent;
Described water reducer is for meeting the naphthalenesulfonate water reducer of GB 8076-2008 " concrete admixture " regulation, as HSP-NGX type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
This example gained sand-cement slurry the performance test results is as follows:
(1) denseness: 73mm
(2) 28d shrinking percentage: 0.08%
(3) 28d ultimate compression strength: 50.9MPa
(4) 28d folding strength: 10.5MPa
(5) 28d cohesive strength: 2.28MPa
(6) 0 ~ 30min polarized potential: 730 ~ 675mV
(7) steel bar corrosion: harmless.
It is cited that content of the present invention is not limited to embodiment, and the conversion of any equivalence that those of ordinary skill in the art take technical solution of the present invention by reading specification sheets of the present invention, is claim of the present invention and contains.
Claims (10)
1. the sand-cement slurry of repairing for concrete structure Damage of Corroded, is characterized in that:
Component by following weight part is made:
Silicate cement 300-330 part;
Flyash 30-40 part;
Silicon ash 20-30 part;
Quartz sand 550-600 part;
Swelling agent 30-40 part;
Water reducer 4-6 part;
Rust inhibitor 1-3 part;
And account for the mixing water of compound gross weight umber 11 ~ 15%.
2. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 1, is characterized in that:
Described silicate cement is P.O 42.5 or P.O 42.5R ordinary Portland cement.
3. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 2, is characterized in that:
Described flyash is I level flyash.
4. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 3, is characterized in that:
Described silicon ash is activated grammite.
5. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 4, is characterized in that:
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand.
6. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 5, is characterized in that:
Described swelling agent is calcium sulphoaluminate class swelling agent, is selected from Sino-t60 type or ZWL type swelling agent.
7. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 6, is characterized in that:
Described water reducer is naphthalenesulfonate water reducer, is selected from ZWL-II type or HSP-NGX type water reducer.
8. sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 7, is characterized in that:
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
9. the preparation method of the sand-cement slurry of repairing for concrete structure Damage of Corroded, is characterized in that:
Realized by following steps:
Step 1: take raw material by the proportioning of following weight part:
Silicate cement 300-330 part;
Flyash 30-40 part;
Silicon ash 20-30 part;
Quartz sand 550-600 part;
Swelling agent 30-40 part;
Water reducer 4-6 part;
Rust inhibitor 1-3 part;
And account for the mixing water of compound gross weight umber 11 ~ 15%;
Water reducer, rust inhibitor are dissolved in the mixing water of 30-40%, stir 1 ~ 2 minute to leaving standstill without precipitation;
Step 2: silicate cement, flyash, silicon ash, quartz sand, swelling agent are put into stirrer dry mixing 1 ~ 2 minute in proportion, then add the liquid mixing that step 1 obtains to stir 2 ~ 3 minutes;
Step 3: stir 2 ~ 3 minutes in the solid-liquid compound that adds step 2 to obtain residue mixing water.
10. the preparation method of sand-cement slurry of repairing for concrete structure Damage of Corroded according to claim 9, is characterized in that:
Described silicate cement is P.O 42.5 or P.O 42.5R ordinary Portland cement;
Described flyash is I level flyash;
Described silicon ash is activated grammite;
Described quartz sand is that fineness modulus is 2.2 ~ 2.6 medium sand;
Described swelling agent is calcium sulphoaluminate class swelling agent, is selected from Sino-t60 type or ZWL type swelling agent;
Described water reducer is naphthalenesulfonate water reducer, is selected from ZWL-II type or HSP-NGX type water reducer;
Described rust inhibitor is the mixture that trolamine, thanomin and Sodium Benzoate are composited with mass ratio 1:2:1.
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|---|---|---|---|
| CN201410190246.XA CN103964784B (en) | 2014-05-07 | 2014-05-07 | For sand-cement slurry that concrete structure Damage of Corroded is repaired and preparation method thereof |
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| CN106320388A (en) * | 2016-08-22 | 2017-01-11 | 中铁第勘察设计院集团有限公司 | Construction process and method for erosion-resistant protective layer of concrete foundation in salty soil zone |
| CN106316254A (en) * | 2016-08-22 | 2017-01-11 | 中铁第勘察设计院集团有限公司 | Saline soil area concrete foundation anti-corrosion protective layer material and preparation method thereof |
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