CN111138146A - Preparation method of quick-setting cement-based repair mortar - Google Patents
Preparation method of quick-setting cement-based repair mortar Download PDFInfo
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- CN111138146A CN111138146A CN202010024526.9A CN202010024526A CN111138146A CN 111138146 A CN111138146 A CN 111138146A CN 202010024526 A CN202010024526 A CN 202010024526A CN 111138146 A CN111138146 A CN 111138146A
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- repair mortar
- cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a preparation method of quick-setting cement-based repair mortar, which comprises the following steps of: 17-20% of sulphoaluminate cement, 1-3% of Portland cement, 2-4% of slag powder, 0.5-1.0% of water glass, 0.1-0.2% of defoaming agent, 0.2-0.4% of early strength agent and 72-75% of quartz sand; carrying out dry mixing on sulphoaluminate cement, portland cement, slag powder, water glass and quartz sand in advance to obtain a solid material; then mechanically stirring the defoaming agent, the early strength agent and the water to obtain a mixed liquid; then adding the mixed liquid into a forced stirrer; adding the mixed solid material into the mixed liquid, and stirring for not less than 120s, wherein if the slurry is not in a homogeneous state after stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; and stirring to obtain the repair mortar. The quick-setting cement-based repair mortar provided by the invention has the advantages of short setting time, high early strength, no shrinkage of later strength and good compatibility with a concrete matrix.
Description
Technical Field
The invention relates to a preparation method of quick-setting cement-based repair mortar, belonging to the technical field of building materials.
Background
In recent years, reinforced concrete bridges, roads, culverts, aqueducts and large concrete dams are seriously aged or even damaged due to the serious carbonization, the corrosion of reinforcing steel bars, the freeze thawing and the corrosion of concrete structures. The phenomena of aging and damage of the concrete structure in the world are solved by dismantling the old concrete structure and then building a new concrete structure, so that not only can great pressure be applied to the economic development of China to cause great waste of resources, but also a great deal of construction waste can be discarded at will.
Several repair mortars currently available on the market present the following problems: the organic repair mortar is expensive, has poor compatibility with a concrete matrix and has an unattractive repair effect; the common inorganic repair mortar has low early strength, and a concrete facility cannot be normally used in an open manner within a short time after being repaired, so that the overall repair efficiency of the concrete facility is influenced; the later strength of the pure special cement inorganic repair mortar is reversed, so that the repair quality is not high, and the situation of secondary repair may exist in a short time. Therefore, it is necessary to develop a quick-setting cement-based repair mortar with short setting time, high early strength and good compatibility with concrete matrix.
Disclosure of Invention
Aiming at the defects of the existing repair mortar, the invention provides a preparation method of quick-setting cement-based repair mortar, and the repair mortar has the advantages of short setting time, high early strength, no shrinkage of later strength and good compatibility with a concrete matrix.
The invention aims to realize the purpose, and the preparation method of the quick-setting cement-based repair mortar is characterized by comprising the following steps:
step 1), preparing raw materials, wherein the raw materials comprise the following components in parts by weight: 17-20% of sulphoaluminate cement, 1-3% of Portland cement, 2-4% of slag powder, 0.5-1.0% of water glass, 0.1-0.2% of defoaming agent, 0.2-0.4% of early strength agent and 72-75% of quartz sand;
step 2), pre-dry-mixing sulphoaluminate cement, silicate cement, slag powder, water glass and quartz sand to obtain a uniformly-mixed solid material;
step 3), mechanically stirring the defoaming agent, the early strength agent and water to obtain a mixed liquid, wherein the weight of the water is controlled to be 10-12% of that of the solid material; then adding the mixed liquid into a forced stirrer;
step 4), adding the mixed solid materials into the mixed liquid, and stirring by using a forced stirrer, wherein the stirring time is not less than 120s, and if the slurry is not in a uniform state after the stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; and stirring to obtain the repair mortar.
The strength grade of the sulphoaluminate cement is 52.5.
The strength grade of the portland cement is 42.5 grade or 52.5 grade.
The grain diameter of the slag powder is mainly distributed between 1 and 13 mu m, and the grain diameter of the slag powder is D50:3 to 5 mu m.
The modulus of the water glass is 2.0 or 2.3.
The defoaming agent is one of B-340 and B-367.
The early strength agent is one of calcium chloride, triethanolamine and lithium carbonate.
The content of silica in the quartz sand is more than 96 percent.
When the obtained repair mortar is used, the repair mortar is applied to a place needing to be repaired, manually inserted and tamped or mechanically vibrated to be dense, and the surface of the repair mortar is trowelled, humidified and maintained to a specified age and then put into use.
The method is advanced and scientific, and the preparation method of the quick-setting cement-based repair mortar provided by the invention comprises the following specific steps: weighing the components according to the weight ratio, and pre-dry-mixing sulphoaluminate cement, portland cement, slag powder, water glass and quartz sand to uniformly mix solid materials for later use; mechanically stirring the defoaming agent, the early strength agent and the water, and adding the mixture into a forced stirrer, wherein the water consumption is controlled to be 10-12% of the solid mass of the repair mortar; adding the mixed solid material into the mixed liquid, and stirring for at least 120s, wherein if the slurry is not in a homogeneous state after stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; and finally, applying the slurry to a place needing to be repaired, manually tamping or mechanically vibrating to compact, trowelling the surface of the slurry, humidifying and maintaining the slurry to a specified age, and putting the slurry into use.
In the invention, in a ternary gelling system consisting of sulphoaluminate cement, portland cement and slag powder, the sulphoaluminate cement and the portland cement can mutually promote hydration to obtain higher early strength, and the later strength of the sulphoaluminate cement is higher than that of the sulphoaluminate cement singly; the addition of the slag powder can reduce the alkalinity of the system, reduce the carbonization of a hardened body and prolong the service life of the hardened body; the addition of the slag powder can also fill the pores and capillary pores of the mortar by utilizing the micro aggregate effect, improve the pore structure and improve the compactness of the mortar.
The defoaming agent can inhibit the generation of an elastic film on the surface of the liquid and inhibit the generation of bubbles in slurry, thereby increasing the compactness of the repair mortar and further increasing the strength of the repair mortar; the early strength agent is added, so that the compound system can be accelerated to generate ettringite in early stage, and the early strength of the compound system is improved; the addition of the water glass can excite the potential gelling activity of the slag powder, so that the early strength of the composite system is further improved; the quartz sand is used as aggregate, plays a role in supporting and compacting the repair mortar, and ensures the good volume stability of the repair mortar.
Has the advantages that: the quick-setting cement-based repair mortar prepared by the invention has quick setting time and high early strength, and can be used for repair projects needing to be put into use quickly; the later strength is high, the repair durability is good, and the secondary repair rate can be effectively reduced; the compatibility with a cement matrix is good, the good repairing effect is ensured, and the durability of the repairing engineering is improved.
In conclusion, the invention discloses quick-setting repair mortar, which comprises the raw materials of sulphoaluminate cement, portland cement, slag powder, water glass, a defoaming agent, an early strength agent and quartz sand. The invention has the advantages of quick setting, high early strength and good compatibility with a cement matrix by optimizing the mortar composition. The sulphoaluminate cement, the Portland cement and the slag powder are compounded, so that the repair mortar has higher early strength and higher later strength; the water glass can excite the potential gelling activity of the slag powder, so that the early strength of the repair mortar is further improved; the defoaming agent can eliminate the influence of the hole defect in the composite system on the mechanical property and the construction performance of the repair mortar as much as possible; the early strength agent can accelerate the hydration speed of the slurry and promote the improvement process of the early strength of the repair mortar. The invention can be widely applied to the repair and reinforcement of roads, bridges, buildings and other projects.
Detailed Description
Example 1:
firstly, uniformly mixing 306g of 52.5 sulphoaluminate cement, 54g of 42.5 Portland cement, 72g of slag powder, 18g of 2.0 modulus water glass and 1296g of quartz sand to obtain a uniformly mixed solid material;
then mechanically stirring 1.8g of B-340 antifoaming agent, 3.6g of triethanolamine early strength agent and 180g of water to obtain mixed liquid, and then adding the mixed liquid into a forced stirrer;
finally, adding the mixed solid material into the mixed liquid, and stirring by using a forced stirrer, wherein the stirring time is not less than 120s, and if the slurry is not in a uniform state after the stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; the mortar was stirred and prepared into slurry, and the results of the performance tests are shown in Table 1.
Example 2:
firstly, 342g of 52.5 sulphoaluminate cement, 54g of 52.5 Portland cement, 54g of slag powder, 10.8g of 2.3 modulus water glass and 1350g of quartz sand are uniformly mixed to obtain a uniformly mixed solid material;
then 3.6g of B-367 antifoaming agent, 7.2g of calcium chloride early strength agent and 200g of water are mechanically stirred to obtain mixed liquid, and then the mixed liquid is added into a forced stirrer;
finally, adding the mixed solid material into the mixed liquid, and stirring by using a forced stirrer, wherein the stirring time is not less than 120s, and if the slurry is not in a uniform state after the stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; the mortar was stirred and prepared into slurry, and the results of the performance tests are shown in Table 1.
Example 3:
firstly, uniformly mixing 360g of 52.5 sulphoaluminate cement, 18g of 52.5 Portland cement, 72g of slag powder, 18g of 2.3 modulus water glass and 1350g of quartz sand to obtain a uniformly mixed solid material;
then mechanically stirring 3.6g of B-340 antifoaming agent, 7.2g of lithium carbonate early strength agent and 220g of water to obtain a mixed liquid, and then adding the mixed liquid into a forced stirrer;
finally, adding the mixed solid material into the mixed liquid, and stirring by using a forced stirrer, wherein the stirring time is not less than 120s, and if the slurry is not in a uniform state after the stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; the mortar was stirred and prepared into slurry, and the results of the performance tests are shown in Table 1.
Table 1 results of performance testing of examples
Note: the maintenance time corresponding to the standard index is 6h
The performances of the high-fluidity rapid repair mortar measured in the table 1 all meet the related performances specified in the standard JC/T2381-.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (9)
1. The preparation method of the quick-setting cement-based repair mortar is characterized by comprising the following steps:
step 1), preparing raw materials, wherein the raw materials comprise the following components in parts by weight: 17-20% of sulphoaluminate cement, 1-3% of Portland cement, 2-4% of slag powder, 0.5-1.0% of water glass, 0.1-0.2% of defoaming agent, 0.2-0.4% of early strength agent and 72-75% of quartz sand;
step 2), pre-dry-mixing sulphoaluminate cement, silicate cement, slag powder, water glass and quartz sand to obtain a uniformly-mixed solid material;
step 3), mechanically stirring the defoaming agent, the early strength agent and water to obtain a mixed liquid, wherein the weight of the water is controlled to be 10-12% of that of the solid material; then adding the mixed liquid into a forced stirrer;
step 4), adding the mixed solid materials into the mixed liquid, and stirring by using a forced stirrer, wherein the stirring time is not less than 120s, and if the slurry is not in a uniform state after the stirring is finished, the stirring time can be prolonged to 180s, but the total stirring time is not more than 240 s; and stirring to obtain the repair mortar.
2. The method for preparing the quick-setting cement-based repair mortar of claim 1, wherein the sulphoaluminate cement has a strength grade of 52.5.
3. The method for preparing a rapid-setting cement-based repair mortar according to claim 1, wherein the strength grade of the portland cement is 42.5 grade or 52.5 grade.
4. The method for preparing the quick-setting cement-based repair mortar according to claim 1, wherein the slag powder mainly has a particle size distribution of 1-13 μm and a particle size distribution of D50:3-5 μm.
5. The method for preparing a quick-setting cement-based repair mortar according to claim 1, wherein the water glass has a modulus of one of 2.0 and 2.3.
6. The method for preparing the quick-setting cement-based repair mortar according to claim 1, wherein the defoaming agent is one of B-340 and B-367.
7. The method for preparing the quick-setting cement-based repair mortar according to claim 1, wherein the early strength agent is one of calcium chloride, triethanolamine and lithium carbonate.
8. The method for preparing the quick-setting cement-based repair mortar according to claim 1, wherein the silica content of the quartz sand is more than 96%.
9. The method for preparing a rapid-setting cement-based repair mortar as claimed in claim 1, wherein the repair mortar obtained is applied to a site to be repaired, manually inserted or mechanically vibrated to compact the repair mortar, and the surface of the repair mortar is leveled and maintained for a predetermined period of time before being put into use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010024526.9A CN111138146A (en) | 2020-01-10 | 2020-01-10 | Preparation method of quick-setting cement-based repair mortar |
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| CN202010024526.9A CN111138146A (en) | 2020-01-10 | 2020-01-10 | Preparation method of quick-setting cement-based repair mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929404A (en) * | 2021-11-29 | 2022-01-14 | 广东碧通百年科技有限公司 | Building repair reinforcing mortar |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211358A (en) * | 2014-09-11 | 2014-12-17 | 中国中材国际工程股份有限公司 | Rapid-hardening early strength high-ductility cement-based composite material and preparation method thereof |
| CN104926253A (en) * | 2015-06-03 | 2015-09-23 | 河南汇能路桥科技有限公司 | Pavement/bridge deck concrete fast mending material and application thereof |
| KR101609697B1 (en) * | 2015-08-13 | 2016-04-06 | 주식회사 모던비앤씨 | Cement mortar compositions un-split in water and repairing method of concrete structure therewith |
| CN106587862A (en) * | 2016-12-12 | 2017-04-26 | 江苏中铁奥莱特新材料股份有限公司 | Superfine quick-setting self-compacting repair mortar and preparation method thereof |
| CN107324738A (en) * | 2017-08-29 | 2017-11-07 | 李建州 | A kind of Cement Concrete Pavement Reconstruction material and Cement Concrete Pavement Reconstruction method |
| CN107793098A (en) * | 2017-09-13 | 2018-03-13 | 南京工业大学 | High-fluidity rapid repair mortar |
-
2020
- 2020-01-10 CN CN202010024526.9A patent/CN111138146A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211358A (en) * | 2014-09-11 | 2014-12-17 | 中国中材国际工程股份有限公司 | Rapid-hardening early strength high-ductility cement-based composite material and preparation method thereof |
| CN104926253A (en) * | 2015-06-03 | 2015-09-23 | 河南汇能路桥科技有限公司 | Pavement/bridge deck concrete fast mending material and application thereof |
| KR101609697B1 (en) * | 2015-08-13 | 2016-04-06 | 주식회사 모던비앤씨 | Cement mortar compositions un-split in water and repairing method of concrete structure therewith |
| CN106587862A (en) * | 2016-12-12 | 2017-04-26 | 江苏中铁奥莱特新材料股份有限公司 | Superfine quick-setting self-compacting repair mortar and preparation method thereof |
| CN107324738A (en) * | 2017-08-29 | 2017-11-07 | 李建州 | A kind of Cement Concrete Pavement Reconstruction material and Cement Concrete Pavement Reconstruction method |
| CN107793098A (en) * | 2017-09-13 | 2018-03-13 | 南京工业大学 | High-fluidity rapid repair mortar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929404A (en) * | 2021-11-29 | 2022-01-14 | 广东碧通百年科技有限公司 | Building repair reinforcing mortar |
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Application publication date: 20200512 |