CN114276114A - Early-strength rapid-hardening anti-permeability crack repairing material - Google Patents
Early-strength rapid-hardening anti-permeability crack repairing material Download PDFInfo
- Publication number
- CN114276114A CN114276114A CN202111659261.0A CN202111659261A CN114276114A CN 114276114 A CN114276114 A CN 114276114A CN 202111659261 A CN202111659261 A CN 202111659261A CN 114276114 A CN114276114 A CN 114276114A
- Authority
- CN
- China
- Prior art keywords
- component
- parts
- cement
- early
- hardening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an early-strength rapid-hardening anti-permeability crack repairing material, which comprises the following components: the component A and the component B are independently packaged, and the mass ratio of the component A to the component B is 1: 1; wherein, the component A is a solid powder component which consists of 65-85 parts of cement, 2-8 parts of nano silicon dioxide, 3-5 parts of nano calcium carbonate, 10-20 parts of anhydrous gypsum, 0.5-1.0 part of water reducing agent and 1-5 parts of redispersible rubber powder by mass, and the content of the early-strength quick-hardening cement in the cement is between 10 and 25 percent; the component B is a liquid component and consists of: 60-80 parts of water, 5-20 parts of soluble silicate, 0.02-0.15 part of lithium carbonate, 1-3 parts of polyaluminium sulfate and 1-2 parts of stabilizer. The repair material of the invention has high cement ratio and good fluidity without bleeding, and can simultaneously meet the requirements of perfusion repair of micro cracks and wide cracks; the material also has the advantages of strong bonding force, quick hardening, high strength, low shrinkage rate and the like, and the repaired part has the advantages of high compressive strength, good impermeability and frost resistance and the like.
Description
Technical Field
The invention relates to a concrete crack repairing material, in particular to an early-strength rapid-hardening anti-permeability crack repairing material.
Background
Concrete, which is a brittle material commonly used in buildings, high-speed rail plates, dams, airports, etc., may cause cracks due to its own factors and the external environment. These cracks grow gradually with time under the action of factors such as environment, and the service life of the concrete is affected, so that the cracks need to be repaired in time. The cracks are classified into ultra-fine cracks of 0.4mm or less, fine cracks of 0.4mm to 4mm, and wide and large cracks of 4mm or more according to their widths.
For the ultra-fine cracks, at present, organic resin emulsion materials are mainly adopted for filling and repairing, and epoxy resin emulsion, polyurea resin emulsion, polyurethane emulsion, acrylic polymer emulsion and the like are commonly used. The emulsion has good fluidity, can easily infiltrate into narrow concrete cracks, and achieves the repairing function mainly by exerting the film forming property and the caking property of materials. However, the organic resin emulsion materials are only suitable for repairing ultrafine cracks, and if the organic resin emulsion materials are used for repairing fine cracks with a crack width of 0.4mm-4mm, the organic resin emulsion materials do not have ideal repairing effects because the organic resin emulsion materials are not enough in strength and environmental tolerance and are easy to crack.
At present, grouting repair is only suitable for wide and large cracks, and the effect of repairing fine cracks in a grouting mode is poor. The main reasons for this are: the water-cement ratio of the existing grouting material is about 0.3-0.5, the fluidity of the slurry is extremely poor, the slurry is difficult to permeate into the interior of a micro crack to achieve the repairing effect, and the bleeding layering of the slurry can be caused when the fluidity of the slurry is improved by simply increasing the water-cement ratio, so that the filling effect cannot be ensured; the existing high-fluidity crack repairing material can not be quickly solidified and hardened after being filled into the crack, has poor bonding property and can not meet the repairing requirement.
The prior application CN112321324A of the applicant discloses a bi-component material for repairing the micro cracks of high-strength concrete, wherein the component A comprises 50-70 parts of water, 3-10 parts of auxiliary agent and 20-40 parts of water-soluble silicate, wherein the auxiliary agent is a penetrating agent, a dispersing agent and a preservative agent which is a pH regulator; the component B comprises 50-70 parts of superfine cement, 0.1-0.6 part of calcium oxide/magnesium oxide, 5-8 parts of calcium oxide active material, 20-30 parts of aggregate, 1-5 parts of rubber powder and 0.5-3 parts of auxiliary agent, wherein the aggregate is heavy calcium carbonate, quartz powder, nano silicon or nano calcium carbonate, and the auxiliary agent is rheological agent, pour point regulator and polycarboxylic acid water reducer powder. The material is used for repairing micro cracks of 0.4mm-4 mm. The material A and the material B are not mixed, and the use method for repairing the cracks comprises the following steps: wetting the micro cracks of the concrete by using the powder A, spraying the powder B to the micro cracks, compacting, spraying the top surface of the concrete A, and curing. The patent mainly uses A to form a large amount of hydrophilic groups for the material B to combine on the surface of the concrete, then utilizes the characteristic that particles of fine powder B can be sprayed into the fine cracks to react with the hydrophilic groups and combine in the fine cracks to play a role in blocking, and finally sprays A as a cover surface to further react with unreacted components in the material B. In the patent, the component B is in the form of powder, and the powder is sprayed and filled into the fine cracks by means of a spray gun and the like. The method is fashionable and operable for repairing the micro cracks on the top surface of the building, depends on the effective amount of powder entering the cracks and remaining for the micro cracks on the wall surface to a great extent, and is not suitable for repairing wide cracks.
Therefore, it is necessary to develop a material capable of satisfying both the repair requirements for fine cracks and wide cracks.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides an early-strength and rapid-hardening anti-permeability crack repairing material which can simultaneously meet the repairing requirements of micro cracks and wide cracks, has the advantages of no bleeding, strong bonding force, low shrinkage rate, high hardening speed, high early strength and the like while considering high cement ratio and high fluidity, can be put into use after repairing construction for 24 hours for the micro cracks, and has high later-stage compressive strength, good anti-permeability and good anti-freezing property of repaired parts.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, the present invention provides an early strength and rapid hardening type impervious crack repairing material, which comprises: the component A and the component B are independently packaged, and the mass ratio of the component A to the component B is 1: 1;
wherein, the weight portions of the components are counted,
the component A is a solid powder component and consists of 65-85 parts of cement, 2-8 parts of nano silicon dioxide, 3-5 parts of nano calcium carbonate, 10-20 parts of anhydrous gypsum, 0.5-1.0 part of water reducing agent and 1-5 parts of redispersible rubber powder; the cement contains 10-25% of early strength quick hardening cement by mass percent; the component B is a liquid component and consists of 60-80 parts of water, 5-20 parts of soluble silicate, 0.02-0.15 part of lithium carbonate, 1-3 parts of polyaluminium sulfate and 1-2 parts of stabilizer.
According to a preferred embodiment of the invention, the cement is portland cement or a combination of portland cement and early strength quick-setting cement. Wherein the common cement can be PO42.5 or PI42.5 portland cement. Preferably, the ordinary cement and the early-strength rapid-hardening cement are combined according to the mass ratio of 70-80: 10-20. The early-strength quick-hardening cement has poor durability, cannot be applied in large quantity, and can play a role in early-strength quick-hardening when being added in a small quantity in common portland cement.
According to the preferred embodiment of the invention, the cement is ultrafine cement, and the specific surface area is not less than 450 square meters per Kg.
According to a preferred embodiment of the present invention, the water reducing agent is a polycarboxylic acid water reducing agent.
According to a preferred embodiment of the invention, the soluble silicate is potassium silicate, sodium silicate or a combination of both.
According to a preferred embodiment of the present invention, the stabilizer preferably includes, but is not limited to, at least one of a polyvinyl alcohol stabilizer, a polyethylene glycol stabilizer, and a polydimethylsiloxane-based stabilizer; more preferably a polyvinyl alcohol stabilizer.
In a second aspect, the invention provides a method for repairing cracks by using the early-strength and rapid-hardening anti-permeability crack repairing material, which comprises the following steps:
firstly, mixing all the components of the component B in a liquid stirrer, and uniformly stirring at a high speed;
and then uniformly mixing the components of the component A in a solid mixer, mixing the components with the component B according to the mass ratio of 1:1, fully stirring for 5-10min, and immediately pouring the mixture to a crack.
Preferably, when the crack is a micro crack or a crack on a non-structural support concrete structure, the crack can be put into use after being repaired for 24 hours;
when the cracks are wide cracks or cracks on a concrete structure of the structural support body, the concrete can be put into use after being maintained for 28 days after repair construction. The maintenance method after repair construction is natural maintenance, heat preservation is needed when the temperature is lower than 5 ℃, water spraying maintenance is needed when the temperature is higher than 35 ℃, too fast water loss is avoided, and the humidity is controlled to be 60-70% RH.
(III) advantageous effects
The technical effects of the scheme of the invention mainly comprise:
(1) the repair material comprises a solid powder component and a liquid component which are independently packaged, wherein a certain amount of nano silicon dioxide and nano calcium carbonate are added into the solid powder component. The nano silicon oxide and the nano calcium carbonate have the characteristics of high activity and high specific surface area, and are used as micro aggregates to be filled in a cementing material system, so that the early hydration rate of the set cement can be further improved, the cement hydration reaction process is accelerated, a homogeneous system is quickly achieved through the cement hydration reaction, the slurry consistency is improved, and bleeding stratification is prevented (the homogeneous system is obtained by completing the hydration process without bleeding after the components are mixed). In addition, the invention can give consideration to high cement ratio, improve fluidity and permeability to fine cracks, and simultaneously avoid the problem of bleeding stratification.
(2) The main component of the liquid component of the repair material is water, and a certain amount of potassium/sodium silicate, lithium carbonate, polyaluminium sulfate, stabilizer and the like are added, and the liquid component is used for replacing the water in the traditional prepared repair mortar. The potassium/sodium silicate and the lithium carbonate in the liquid component play roles in accelerating the hydration reaction rate of the cement and increasing the early hardening strength of the material, and are compounded with polyaluminium sulfate, so that the setting time is further greatly shortened, and the setting material has high early strength.
(3) The nano silicon dioxide and the nano calcium carbonate added in the solid powder component have very small particles, and are filled in the tiny pores of a cementing material system, so that the dry shrinkage condition is prevented. Meanwhile, the cement component of the solid powder component contains a certain amount of early-strength quick-hardening cement, and micro-expansion is generated under the action of lithium carbonate, so that the dry shrinkage rate of the material is further reduced. The liquid component and the solid component are mixed to produce a series of chemical and hydration reactions, so that the slurry is quickly coagulated to produce strength.
In conclusion, the repair material has low bleeding property while considering high water-cement ratio (about 1:1) and good fluidity, and can meet the requirements of perfusion repair on micro cracks (0.4-1mm) and wide cracks (more than or equal to 4 mm); the repairing material also has the advantages of strong bonding force, quick hardening, high strength, low shrinkage rate and the like, the repaired part has the advantages of high compressive strength, good impermeability and frost resistance and the like after being repaired, the repairing material can be put into use after 24 hours for repairing the micro cracks, the construction period is short, and the material is easy to obtain and has low cost.
Detailed Description
For better explanation of the present invention to facilitate understanding, the present invention provides an early strength, rapid hardening, impervious crack repairing material in detail with reference to the following embodiments, which comprises: the component A and the component B are independently packaged, and the mass ratio of the component A to the component B is 1: 1;
wherein, the component A is a solid powder component which comprises the following components in parts by mass: 65-85 parts of cement, 2-8 parts of nano silicon dioxide, 3-5 parts of nano calcium carbonate, 10-20 parts of anhydrous gypsum, 0.5-1.0 part of water reducing agent and 1-5 parts of redispersible rubber powder, wherein the cement contains a certain proportion of early strength quick hardening cement, and the content of the early strength quick hardening cement is 10-25%; the component B is a liquid component and consists of: 60-80 parts of water, 5-20 parts of soluble silicate, 0.02-0.15 part of lithium carbonate, 1-3 parts of polyaluminium sulfate and 1-2 parts of stabilizer.
Preferably, the cement in the A component is ordinary cement or a combination of ordinary cement and early-strength quick-hardening cement. Wherein the common cement can be PO42.5 or PI42.5 portland cement. Preferably, the ordinary cement and the early-strength rapid-hardening cement are combined according to the mass ratio of 70-80: 10-20. Furthermore, the cement is superfine cement, and the specific surface area is not less than 450 square meters per Kg.
Preferably, the water reducing agent is a polycarboxylic acid-based water reducing agent.
Preferably, the soluble silicate in the B component is potassium silicate, sodium silicate or a combination of both.
Preferably, the stabilizer in the B component preferably includes, but is not limited to, at least one of a polyvinyl alcohol stabilizer, a polyethylene glycol stabilizer, and a polydimethylsiloxane-based stabilizer; more preferably a polyvinyl alcohol stabilizer.
The nano silicon dioxide and the nano calcium carbonate in the component A are both nano materials, have high activity and very large specific surface area, and have the main functions of (1) being used as micro aggregate (having very high chemical activity, so that the product has better properties such as high strength, impermeability and the like) to be filled in a cementing material system, thereby improving the early hydration rate of cement and accelerating the hydration reaction process of the cement. (2) The high activity of the nano silicon dioxide is utilized to promote the hydration of the cement, and the addition of the nano calcium carbonate enables the hardened material to have higher compressive strength. The two nano materials are combined to obtain better material performance. The anhydrous gypsum in the component A is used for reducing the heat of hydration, slowing down the hydration reaction and leading the hydration reaction to be carried out more fully and uniformly. The dispersible latex powder in the component A mainly plays roles in improving the viscosity of the slurry, reducing the bleeding rate and improving the adhesion with the concrete substrate. In the component A, the water reducing agent can reduce the water consumption for mixing. Most of them belong to anionic surfactants, such as lignosulfonate, naphthalene sulfonate formaldehyde polymer, etc. After the concrete mixture is added, the cement particles are dispersed, the workability of the cement particles can be improved, the unit water consumption is reduced, and the fluidity of the concrete mixture is improved.
The cement in the component A is preferably the combination of ordinary cement and early-strength quick-hardening cement according to the mass ratio of 70-80: 10-20. The early-strength quick-hardening cement has poor durability, cannot be applied in large quantity, and can play a role in early-strength quick-hardening when being added in a small quantity when being combined with common cement.
In the component B, lithium carbonate is a setting accelerator or a catalyst for cement hydration reaction, the addition of the lithium carbonate can greatly improve the setting speed and effectively enhance the early strength of the hardening of the material, but only the use of the lithium carbonate has certain influence on the later strength of the material; in the invention, a certain amount of potassium/sodium silicate and lithium carbonate are added in the component B for combination, and the combination of the potassium/sodium silicate and the lithium carbonate can not only promote the coagulation speed, but also improve the later strength of the material, so that the early and later strengths of the material are higher. The polyaluminium sulfate is an early strength agent, and the technical effect is optimal when the polyaluminium sulfate is used in the invention compared with other early strength agents, such as sodium sulfate or calcium formate and the like. In the component B, lithium carbonate, potassium/sodium silicate and polyaluminium sulfate jointly act, so that the coagulation time can be greatly shortened, the hydration reaction is rapidly carried out, the material has high early strength, and the plugging and repairing effect on the repaired part is rapidly realized. A certain stabilizer is also added into the component B, and the stabilizer preferably comprises but is not limited to at least one of a polyvinyl alcohol stabilizer, a polyethylene glycol stabilizer and a polydimethylsiloxane-based stabilizer; more preferably polyvinyl alcohol. The main functions of the stabilizer comprise: the hydration heat of hydration reaction is reduced, the hydration process is controllable, and the problems of material internal defects and the like caused by a violent hydration hardening reaction process are prevented. In addition, the addition of the stabilizer increases the overall viscosity of the slurry, slows down the sedimentation speed of particles and ensures that the material does not bleed while keeping high fluidity.
After the powder of the component B and the powder of the component A are mixed and reacted according to the mass ratio of 1:1, the slurry has a certain micro-expansion effect after being coagulated and hardened, and the dry shrinkage rate of the material is effectively reduced. Specifically, the nano silicon oxide and the nano calcium carbonate in the component A have a micro-aggregate effect, and can fill and block pores in the cementing material to prevent the material from shrinking after hardening; meanwhile, the micro-expansion effect generated by the intrinsic hydration of cement (especially early-strength rapid-hardening cement) is combined, so that the dry shrinkage rate of the material can be effectively reduced, and the hardened material has high compressive strength, good impermeability and frost resistance; the crack on the micro-crack or the non-structural support concrete structure can be used after being repaired for 24 hours, and the crack on the wide crack or the structural support concrete structure needs to be maintained for 28 days and then is used.
Compared with the prior application, the invention has the main innovation that:
(1) the bleeding phenomenon is not generated under the condition of realizing a high cement ratio of 1:1, and the characteristics of slurry fluidity, perfusability of perfusing into a micro crack, no bleeding stratification and the like are considered.
(2) The component A of the invention uses the common cement and the early strength rapid hardening cement in a matching way, controls the content of the common rapid hardening cement, plays a role in early strength rapid hardening (greatly shortens the setting time and enables the setting material to have high early strength), but the proportion cannot be too large, thus easily causing poor durability and insufficient later strength of the repaired part. A small amount of nano-silica and a small amount of nano-calcium carbonate are jointly used as the micro-aggregate, the promotion effect of the high activity of the nano-silica on the hydration of cement is utilized, and the addition of the nano-calcium carbonate enables the hardened material to have higher compressive strength. The two nano materials are combined to obtain better material performance, prevent the material from shrinking after hardening, and have no bleeding under the condition of high cement ratio.
(3) A certain amount of anhydrous gypsum is added into the component A for reducing the hydration heat and slowing down the hydration reaction so that the hydration reaction is more fully and uniformly carried out.
(4) The component B of the invention jointly takes effect of lithium carbonate, soluble silicate and polyaluminium sulfate, can greatly shorten the coagulation time, rapidly carry out hydration reaction, enable the material to have very high early strength, and rapidly play a role in plugging and repairing the repaired part. The stabilizer of the component B can reduce hydration reaction hydration heat, so that the hydration process is controllable, the problems of material internal defects and the like caused by a severe hydration hardening reaction process are solved, the overall viscosity of the slurry is increased, the particle settling speed is slowed down, and the material is ensured not to bleed on the premise of high cement ratio and high fluidity; thereby satisfying the repair of the micro cracks and the wide cracks by the way of pouring slurry or scraping slurry.
The following are preferred embodiments of the present invention.
Example 1
The embodiment provides a method for repairing and constructing a micro crack by using an early-strength rapid-hardening anti-permeability crack repairing material, which comprises the following steps:
(1) preparing an early-strength rapid-hardening anti-permeability crack repairing material:
the component A is changed to contain: 70 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 6 parts of nano silicon dioxide, 4 parts of nano calcium carbonate, 15 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder.
The component B comprises: 75 parts of water, 15 parts of potassium silicate, 0.1 part of lithium carbonate, 2 parts of polyaluminium sulfate and 1.5 parts of polyvinyl alcohol stabilizer. The above parts are all parts by mass.
(2) Repairing construction:
the repaired site is cleaned with dust as necessary. Then, all materials in the component B are mixed in a liquid stirrer and are uniformly stirred at a high speed; and uniformly mixing the materials in the component A in a solid mixer, mixing the materials with the component B according to the mass ratio of 1:1, stirring for 6min, and quickly pouring the mixture to a micro crack to be repaired.
Example 2
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 1, a component A is changed to contain: 75 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 2 parts of nano silicon dioxide, 5 parts of nano calcium carbonate, 15 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Example 3
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 1, a component A is changed to contain: 80 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 8 parts of nano silicon dioxide, 3 parts of nano calcium carbonate, 15 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Example 4
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 1, a component A is changed to contain: 70 parts of PO42.5 cement, 20 parts of early strength quick-hardening cement, 8 parts of nano silicon dioxide, 3 parts of nano calcium carbonate, 15 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Example 5
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 1, a component B is changed to contain: 75 parts of water, 14 parts of potassium silicate, 0.10 part of lithium carbonate, 2 parts of polyaluminium sulfate and 2 parts of polyvinyl alcohol stabilizer. The A component is the same as in example 1.
Example 6
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 5, a component B is changed to contain: 60 parts of water, 5 parts of potassium silicate, 0.15 part of lithium carbonate, 2 parts of polyaluminium sulfate and 1.5 parts of polyvinyl alcohol stabilizer. The A component is the same as in example 1.
Example 7
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 5, a component B is changed to contain: 80 parts of water, 20 parts of potassium silicate, 0.15 part of lithium carbonate, 2 parts of polyaluminium sulfate and 1.5 parts of polyvinyl alcohol stabilizer. The A component is the same as in example 1.
Example 8
The embodiment provides an early-strength rapid-hardening anti-permeability crack repairing material, and specifically, on the basis of embodiment 5, a component B is changed to contain: 80 parts of water, 20 parts of potassium silicate, 0.05 part of lithium carbonate, 2.5 parts of polyaluminium sulfate and 1.5 parts of polyvinyl alcohol stabilizer. The A component is the same as in example 1.
Comparative example 1
The comparative example provides an early-strength rapid-hardening type anti-seepage crack repairing material, and on the basis of example 1, the material comprises a component A and a component B. The component A contains: 70 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 25 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Comparative example 2
The comparative example provides an early strength rapid hardening type anti-permeability crack repairing material, which comprises a component A and a component B. The component A contains: 70 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 6 parts of nano silicon dioxide, 19 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Comparative example 3
The comparative example provides an early strength rapid hardening type anti-permeability crack repairing material, which comprises a component A and a component B. The component A contains: 70 parts of PO42.5 cement, 10 parts of early strength quick-hardening cement, 5 parts of nano calcium carbonate, 20 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
Comparative example 4
The comparative example provides an early strength rapid hardening type anti-permeability crack repairing material, which comprises a component A and a component B. The A component is the same as in example 1. The component B is as follows: 80 parts of water, 0.10 part of lithium carbonate, 2 parts of polyaluminium sulfate and 1.5 parts of polyvinyl alcohol stabilizer.
Comparative example 5
The comparative example provides an early strength rapid hardening type anti-permeability crack repairing material, which comprises a component A and a component B. The A component is the same as in example 1.
The component B is as follows: 75 parts of water, 15 parts of potassium silicate and 1.5 parts of polyvinyl alcohol stabilizer.
Comparative example 6
The comparative example provides an early-strength rapid-hardening type anti-seepage crack repairing material, and on the basis of example 1, the material comprises a component A and a component B. The component A contains: 70 parts of PO42.5 cement, 6 parts of nano silicon dioxide, 4 parts of nano calcium carbonate, 15 parts of anhydrous gypsum, 0.8 part of polycarboxylic acid water reducing agent and 4 parts of redispersible rubber powder. The B component was the same as in example 1.
On a concrete test block, the crack is repaired according to the repair construction in the embodiment 1, and the test data is as follows:
example test data
Comparative example test data
In conclusion, the repair material has low bleeding property while considering high water-cement ratio (the water-cement ratio is close to 1:1) and good fluidity, and can meet the requirements of pouring and repairing micro cracks and wide cracks; the repairing material also has the advantages of strong bonding force, quick hardening, high strength, low shrinkage rate and the like, and the repaired part has the advantages of high compressive strength, good impermeability and frost resistance and the like. And the properties are directly related to the components and the proportion of the materials in the solid powder component (A component) and the liquid component (B component). When only nano-silica or only nano-calcium carbonate is added to the solid powder component, the final material cannot achieve the material properties of the embodiments of the present invention. Likewise, when only potassium silicate or only polyaluminium sulfate and lithium carbonate were added to liquid component B, the final material still failed to achieve the material properties of the inventive examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An early-strength rapid-hardening anti-permeability crack repairing material is characterized by comprising the following components: the component A and the component B are independently packaged, and the mass ratio of the component A to the component B is 1: 1;
wherein, the weight portions of the components are counted,
the component A is a solid component and consists of 65-85 parts of cement, 2-8 parts of nano silicon dioxide, 3-5 parts of nano calcium carbonate, 10-20 parts of anhydrous gypsum, 0.5-1.0 part of water reducing agent and 1-5 parts of redispersible rubber powder; the cement contains 10-25% of early strength quick hardening cement by mass percent;
the component B is a liquid component and consists of 60-80 parts of water, 5-20 parts of soluble silicate, 0.02-0.15 part of lithium carbonate, 1-3 parts of polyaluminium sulfate and 1-2 parts of stabilizer.
2. The early strength and rapid hardening type impervious crack healing material according to claim 1, wherein the cement is portland cement or a combination of portland cement and early strength and rapid hardening cement. Wherein the common cement can be PO42.5 or PI42.5 portland cement.
3. The early-strength rapid-hardening type anti-permeability crack repairing material as claimed in claim 2, wherein the cement is a combination of ordinary cement and early-strength rapid-hardening cement according to a mass ratio of 70-80: 10-20.
4. The early strength rapid hardening type anti-permeability crack repairing material according to claim 2 or 3, wherein the cement is ultrafine cement, and the specific surface area is not less than 450 square meters per Kg.
5. The early-strength rapid-hardening anti-seepage crack repairing material of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
6. The early strength, rapid hardening, impervious fracture healing material of claim 1 wherein said soluble silicate is potassium silicate, sodium silicate or a combination of both.
7. The early strength, rapid hardening, impervious crack healing material of claim 1 wherein said stabilizer preferably comprises but is not limited to at least one of polyvinyl alcohol stabilizer, polyethylene glycol stabilizer and polydimethylsiloxane based stabilizer.
8. A method for fracture repair using the early strength and early hardening type impervious fracture repair material according to any one of claims 1 to 7, wherein the method comprises:
firstly, mixing all the components of the component B in a liquid stirrer, and uniformly stirring at a high speed;
and then uniformly mixing the components of the component A in a solid mixer, mixing the components with the component B according to the mass ratio of 1:1, fully stirring for 5-10min, and immediately pouring the mixture to a crack.
9. The method of claim 8, wherein when the crack is a micro crack or a crack on a non-structurally supported concrete structure, the crack is ready for use 24 hours after repair construction;
when the cracks are wide cracks or cracks on a concrete structure of the structural support body, the concrete can be put into use after being maintained for 28 days after repair construction.
10. The method of claim 9, wherein the post-repair curing method comprises: and (4) natural maintenance, wherein heat preservation is needed when the temperature is lower than 5 ℃, water spraying maintenance is needed when the temperature is higher than 35 ℃, too fast water loss is avoided, and the humidity is controlled at 60-70% RH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659261.0A CN114276114A (en) | 2021-12-30 | 2021-12-30 | Early-strength rapid-hardening anti-permeability crack repairing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659261.0A CN114276114A (en) | 2021-12-30 | 2021-12-30 | Early-strength rapid-hardening anti-permeability crack repairing material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114276114A true CN114276114A (en) | 2022-04-05 |
Family
ID=80879012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111659261.0A Pending CN114276114A (en) | 2021-12-30 | 2021-12-30 | Early-strength rapid-hardening anti-permeability crack repairing material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114276114A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115557757A (en) * | 2022-11-14 | 2023-01-03 | 安徽省交通控股集团有限公司 | Anti-scouring adjustable-setting dado concrete suitable for underwater construction |
| CN115724687A (en) * | 2022-11-14 | 2023-03-03 | 北京易晟元环保工程有限公司 | Multi-component material for repairing concrete cracks of cooling tower and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278066A (en) * | 2016-08-10 | 2017-01-04 | 上海亚瓦新型建筑材料有限公司 | Fast hard impervious gap filler |
| CN107698226A (en) * | 2017-09-06 | 2018-02-16 | 合诚工程咨询集团股份有限公司 | A kind of cement-silicate injecting paste material |
| CN110627458A (en) * | 2019-09-03 | 2019-12-31 | 中国能源建设集团甘肃省电力设计院有限公司 | High-early-strength cement-based rapid repairing material and preparation method thereof |
| CN111072366A (en) * | 2019-12-30 | 2020-04-28 | 浙江斯力柯新材料科技有限公司 | Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof |
-
2021
- 2021-12-30 CN CN202111659261.0A patent/CN114276114A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278066A (en) * | 2016-08-10 | 2017-01-04 | 上海亚瓦新型建筑材料有限公司 | Fast hard impervious gap filler |
| CN107698226A (en) * | 2017-09-06 | 2018-02-16 | 合诚工程咨询集团股份有限公司 | A kind of cement-silicate injecting paste material |
| CN110627458A (en) * | 2019-09-03 | 2019-12-31 | 中国能源建设集团甘肃省电力设计院有限公司 | High-early-strength cement-based rapid repairing material and preparation method thereof |
| CN111072366A (en) * | 2019-12-30 | 2020-04-28 | 浙江斯力柯新材料科技有限公司 | Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof |
Non-Patent Citations (7)
| Title |
|---|
| 刘燕燕主编: "《建筑材料》", 31 August 2020, 重庆大学出版社 * |
| 张伟等: "《建筑预拌砂浆应用指南》", 30 April 2020, 中国建材工业出版社 * |
| 张茂花: "《纳米路面混凝土的基本性能》", 30 June 2008, 东北林业大学出版社 * |
| 李伟等: "纳米混凝土的制备及其干缩性能研究", 《东北大学学报（自然科学版）》 * |
| 王迎军主编: "《新型材料科学与技术 无机材料卷（中册）》", 31 October 2016, 华南理工大学出版社 * |
| 程建坤: "无碱液态水泥速凝剂合成方法的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 陕西省建筑设计研究院编: "《建筑材料手册》", 30 April 1997, 中国建筑工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115557757A (en) * | 2022-11-14 | 2023-01-03 | 安徽省交通控股集团有限公司 | Anti-scouring adjustable-setting dado concrete suitable for underwater construction |
| CN115724687A (en) * | 2022-11-14 | 2023-03-03 | 北京易晟元环保工程有限公司 | Multi-component material for repairing concrete cracks of cooling tower and construction method |
| CN115724687B (en) * | 2022-11-14 | 2024-03-12 | 华能莱芜发电有限公司 | Multicomponent material for repairing concrete cracks of cooling tower and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110342883B (en) | Epoxy resin concrete material for 3D printing and preparation method thereof | |
| CN114276114A (en) | Early-strength rapid-hardening anti-permeability crack repairing material | |
| CN109626897A (en) | A kind of injecting paste material and its technique for the regulation of ballastless track of high-speed railway roadbed grout | |
| CN112679190B (en) | Reinforcing waterproof mortar for filling concrete bottom cavity | |
| CN102491670B (en) | WHDF-type water-reducing, seepage-proof and crack-resistant agent for concrete | |
| CN114524909B (en) | Ultra-high-strength concrete additive, preparation method thereof and ultra-high-strength concrete | |
| CN110078408A (en) | A kind of cement concrete salt resistance jelly mixed solution and its application method | |
| CN1559964A (en) | High performance concrete pumping agent controlling falling degree loss type | |
| CN111620648A (en) | Soil solidifying material and soil solidifying method thereof | |
| CN107814542A (en) | A kind of railway grouting material and its production method | |
| CN111320439A (en) | Concrete for renewable prefabricated part and preparation method thereof | |
| CN111848067B (en) | Grouting material for large bridge support and preparation method thereof | |
| CN106587841A (en) | High-ductility cement based composite material and preparation method thereof | |
| CN115677264B (en) | Concrete admixture and preparation method thereof | |
| CN111848066A (en) | Rapid road repairing mortar and construction process thereof | |
| CN111825418A (en) | Novel rapid repair cement based on magnesium oxysulfate cementing material and preparation method thereof | |
| CN115180900B (en) | Ultrahigh-performance premixed pervious concrete and preparation method thereof | |
| CN116813267A (en) | Quick-hardening quick-setting high-strength adhesive mortar for assembled concrete composite wallboard | |
| CN110304860B (en) | Concrete flexibilizer and concrete | |
| CN113200728A (en) | High-strength and high-durability cement-based premix material and preparation method thereof | |
| CN112174562A (en) | Multifunctional admixture composition special for high-strength concrete and preparation method thereof | |
| CN111138146A (en) | Preparation method of quick-setting cement-based repair mortar | |
| CN111848029A (en) | Lithium slag modified ultra-high performance concrete product and preparation method thereof | |
| CN115231895B (en) | Magnesium phosphate cement-based material, preparation method thereof and application thereof in preparation of waterproof building material | |
| CN113831085B (en) | Cement-styrene-acrylic emulsion and waterborne epoxy resin grouting material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |