CN102603256A - Cement-based structure repair mortar and preparation method - Google Patents
Cement-based structure repair mortar and preparation method Download PDFInfo
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- CN102603256A CN102603256A CN2012100780752A CN201210078075A CN102603256A CN 102603256 A CN102603256 A CN 102603256A CN 2012100780752 A CN2012100780752 A CN 2012100780752A CN 201210078075 A CN201210078075 A CN 201210078075A CN 102603256 A CN102603256 A CN 102603256A
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Abstract
The invention relates to the field of new building materials, in particular to a cement-based structure repair mortar and a preparation method. The cement-based structure repair mortar comprises the raw materials of cement, aggregate, wollastonite, unslaked lime, a high efficiency slushing agent and an expanding agent. The proportions of the raw materials by weight are as follows: 40-50% of the ordinary portland cement, 45-55% of the aggregate, 0.8-1.5% of the high efficiency slushing agent, 1-2% of the lime, 1-2% of the wollastonite, 2-6% of the expanding agent and water accounting for 10-15% of the total weight of powders. The repair mortar prepared by the preparation method has the advantages of high early strength, good self-compaction performance, minimum inflation and no shrinkage, the preparation process is simple, and the cost is low. The performance of the cement-based structure repair mortar can be adjusted according to reinforced need, the cement-based structure repair mortar can be used for structure reinforcement, also can be used for rush-repair work, and has wide range of application.
Description
Technical field
The present invention relates to belong to field, new building material field, specifically relate to a kind of cement based structure repair mortar and preparation method.
Background technology
Along with high speed development of national economy, people are to the also constantly development of demand of building, and no matter many existing buildings are state of appearance or functions of use, all can't satisfy the requirement of the modern life, are badly in need of reinforcing and transforming.Cement based reinforcing and repairing mortar is a kind of maximum material of using, and advantage such as it has, and good endurance, intensity are high, nontoxic, pollution-free, low price, flexibility are strong is able to number of applications in structural strengthening.
Traditional cement base reinforcement material exists that intensity is low, splitting resistance is poor, durability index can not be satisfied the demand; The particle of aggregate is excessive or too small; To the shortcomings such as environmental compatibility difference of reinforcing, the security of serious threat concrete structure and weather resistance, even cause the Important Project accident; Thereby limited the application in structural strengthening.
The preparation of cement based structure repair mortar is generally carried out the development of cement based structure repair mortar to concrete works category both at home and abroad at present; Promptly carry out the development that certain has special purpose or possesses the reinforcement material of a certain characteristics; Such as high-strength, large fluidity etc.; And to raw-material kind, specification of quality height, strict to construction process requirement, the scope of application is little.And cement based structure repair mortar exists the contradiction between the different qualities in the application of reality, and is bigger such as the contraction ratio of the high reinforcement material of early strength, is easy to generate microfracture; After adding hardening accelerator later strength there is certain influence again; The type of aggregate and size produce restraining effect to the microdilatancy performance of reinforcement material; Thereby the production and the application of cement based structure repair mortar have been limited.
Summary of the invention
The objective of the invention is to overcome existing cement based structure repair mortar to shortcomings such as raw-material requirements are high, construction technology is complicated, exist contradiction between the different performance, the scope of application is little, thereby provide that a kind of construction technology is simply cheap, the also preparation method of cement based structure repair mortar widely of scope that fast reinforcement material, the flexibility firmly of characteristics such as high-early-strength, high fluidity, suitable operable time, microdilatancy are used more by force.
The present invention adopts following technical scheme to realize:
The present invention provides cement based structure repair mortar and preparation method, and starting material comprise: cement, aggregate, silicon ash, unslaked lime, high efficiency water reducing agent; Adopt following process step:
1) batching: by weight: ordinary Portland cement 40-50%, aggregate 45-55%, high efficiency water reducing agent 0.8-1.5%, calcium lime powder 1-2%, silicon ash 1-2%, swelling agent 2-6%; Water is the 10-15% of powder gross weight;
Described aggregate adopts two kinds of different sand mechanical stirring of thickness to mix;
The weight ratio of fine sand and coarse sand is 1 ~ 4:1 in the described aggregate;
The fineness modulus of described coarse sand is 3.8-4.9; The fineness modulus of fine sand is 2.3-3.1
Described, the fineness of calcium lime powder is controlled at the 60-100 order, the response speed requirement, and adopt ash: the ratio of water=1:2, heat-up rate 6-12 minute temperature is raised to 75 ℃ from 20 ℃.
Described, high efficiency water reducing agent is the 0.8-1.5% of cement weight;
Described, the 3-5% of swelling agent cement weight
2) powder: cement and aggregate mixed by the said ratio mechanical stirring obtain powder A; Calcium lime powder and silicon ash mix by the said ratio mechanical stirring, obtain powder material B; With powder A and the powder material B ratio by weight 1:0.02-0.04, hand mixing mixes and obtains powder C;
Described, the mechanical stirring time is 2-5 minute, stirs;
3) solution: will be set by step 1) high efficiency water reducing agent, swelling agent and the water of said ratio are mixed, and hand mixing is even, obtains solution D;
4) with step 2) powder C that obtains and the mixing of the solution D that arrives of step 3), hand mixing is even, promptly makes cement based structure repair mortar of the present invention.
Described, 3-6 minute hand mixing time, stir;
Beneficial effect of the present invention is following:
1, the cement based structure repair mortar strength for preparing of the present invention is high, and 28 days intensity is the highest can to reach 81.8Mpa;
2, the cement based structure repair mortar early strength for preparing of the present invention is high, and intensity can reach 19.6 Mpa in 2 hours, and 1d intensity can reach 45.9 Mpa;
3, the cement based structure repair mortar for preparing of the present invention has micro-expansibility, and vertical rate of expansion can reach 0.6% in 3 hours, was the pure antimony-doped tin oxide nano powder of homogeneous phase;
4, the cement based structure repair mortar for preparing of the present invention adopts common sand, and is with low cost;
5, the cement based structure repair mortar degree of mobilization for preparing of the present invention is big, can reach 360mm, can self-compacting, and the reinforcing at the position that can be used for being not easy to vibrating;
6, preparing method's technical process of the present invention is simple, suitability for industrialized production that can either mass-producing, and also short run preparation at the scene is applicable to the requirement of different structure.
Embodiment
Embodiment 1
1) be 4.6 coarse sand with the fineness modulus of 1 weight part with 1.5 weight part fineness modulus is that 2.52 fine sand mixes, under the stirring of stirrer, mixes, obtain aggregate;
2) with aggregate and ordinary Portland cement by weight the mixed of 1:1, under the stirring of stirrer, mix, obtain powder A; With silicon ash and the unslaked lime mixed of 1:1 by weight, under the stirring of stirrer, mix, obtain powder material B;
3) with step 2) the powder A that obtains, powder material B be by weight the ratio of 1:0.03, and hand mixing 3-6 minute, mix, obtain powder C;
4) get by weight the water of powder C: water=1:0.13, get 1% high efficiency water reducing agent of contained ordinary Portland cement weight among the powder C, 5% swelling agent is dissolved in the above-mentioned water, hand mixing is even, obtains solution D;
5) the powder C that step 3) is obtained mixes by weight 1:0.18 with the solution D that step 4) obtains, and hand mixing 3-6 minute, has promptly made cement based structure repair mortar.
Cement based structure repair mortar has been carried out performance test:
Cement based structure repair mortar performance test result
It is thus clear that it is high to use the present invention to make cement based structure repair mortar strength, can have good workability, and has micro-expansibility.
Embodiment 2
1) be 4.6 coarse sand with the fineness modulus of 1 weight part with 1.5 weight part fineness modulus is that 2.52 fine sand mixes, under the stirring of stirrer, mixes, obtain aggregate;
2) with aggregate and ordinary Portland cement by weight the mixed of 1:1, under the stirring of stirrer, mix, obtain powder A; With silicon ash and the unslaked lime mixed of 1:1 by weight, under the stirring of stirrer, mix, obtain powder material B;
3) with step 2) the powder A that obtains, powder material B be by weight the ratio of 1:0.03, and hand mixing 3-6 minute, mix, obtain powder C;
4) get by weight the water of powder C: water=1:0.15, get 1% high efficiency water reducing agent of contained ordinary Portland cement weight among the powder C, 5% swelling agent is dissolved in the above-mentioned water, hand mixing is even, obtains solution D;
5) the powder C that step 3) is obtained mixes by weight 1:0.20 with the solution D that step 4) obtains, and hand mixing 3-6 minute, has promptly made cement based structure repair mortar.
Cement based structure repair mortar has been carried out performance test:
Cement based structure repair mortar performance test result
It is thus clear that it is high to use the present invention to make cement based structure repair mortar strength, can have good workability, and has micro-expansibility.
Embodiment 3
1) be 4.6 coarse sand with the fineness modulus of 1 weight part with 1.5 weight part fineness modulus is that 2.52 fine sand mixes, under the stirring of stirrer, mixes, obtain aggregate;
2) with aggregate and ordinary Portland cement by weight the mixed of 1:1, under the stirring of stirrer, mix, obtain powder A; With silicon ash and the unslaked lime mixed of 1:1 by weight, under the stirring of stirrer, mix, obtain powder material B;
3) with step 2) the powder A that obtains, powder material B be by weight the ratio of 1:0.04, and hand mixing 3-6 minute, mix, obtain powder C;
4) get by weight the water of powder C: water=1:0.13, get 1% high efficiency water reducing agent of contained ordinary Portland cement weight among the powder C, 5% swelling agent is dissolved in the above-mentioned water, hand mixing is even, obtains solution D;
5) the powder C that step 3) is obtained mixes by weight 1:0.18 with the solution D that step 4) obtains, and hand mixing 3-6 minute, has promptly made cement based structure repair mortar.
Cement based structure repair mortar has been carried out performance test:
Cement based structure repair mortar performance test result
It is thus clear that it is high to use the present invention to make cement based structure repair mortar strength, can have good workability, and has micro-expansibility.
Embodiment 4
1) be 4.6 coarse sand with the fineness modulus of 1 weight part with 3 weight part fineness modulus is that 2.52 fine sand mixes, under the stirring of stirrer, mixes, obtain aggregate;
2) with aggregate and ordinary Portland cement by weight the mixed of 1:1, under the stirring of stirrer, mix, obtain powder A; With silicon ash and the unslaked lime mixed of 1:1 by weight, under the stirring of stirrer, mix, obtain powder material B;
3) with step 2) the powder A that obtains, powder material B be by weight the ratio of 1:0.03, and hand mixing 3-6 minute, mix, obtain powder C;
4) get by weight the water of powder C: water=1:0.13, get 1% high efficiency water reducing agent of contained ordinary Portland cement weight among the powder C, 5% swelling agent is dissolved in the above-mentioned water, hand mixing is even, obtains solution D;
5) the powder C that step 3) is obtained mixes by weight 1:18 with the solution D that step 4) obtains, and hand mixing 3-6 minute, has promptly made cement based structure repair mortar.
Cement based structure repair mortar has been carried out performance test:
Cement based structure repair mortar performance test result
It is thus clear that it is high to use the present invention to make cement based structure repair mortar strength, can have good workability, and has micro-expansibility.
Embodiment 5
1) be 4.6 coarse sand with the fineness modulus of 4 weight parts with 1 weight part fineness modulus is that 2.52 fine sand mixes, under the stirring of stirrer, mixes, obtain aggregate;
2) with aggregate and ordinary Portland cement by weight the mixed of 1:1, under the stirring of stirrer, mix, obtain powder A; With silicon ash and the unslaked lime mixed of 1:1 by weight, under the stirring of stirrer, mix, obtain powder material B;
3) with step 2) the powder A that obtains, powder material B be by weight the ratio of 1:0.03, and hand mixing 3-6 minute, mix, obtain powder C;
4) get by weight the water of powder C: water=1:0.13, get 1% high efficiency water reducing agent of contained ordinary Portland cement weight among the powder C, 5% swelling agent is dissolved in the above-mentioned water, hand mixing is even, obtains solution D;
5) the powder C that step 3) is obtained mixes by weight 1:18 with the solution D that step 4) obtains, and hand mixing 3-6 minute, has promptly made cement based structure repair mortar.
Cement based structure repair mortar has been carried out performance test:
Cement based structure repair mortar performance test result
It is thus clear that it is high to use the present invention to make cement based structure repair mortar strength, can have good workability, and has micro-expansibility.
Claims (16)
1. cement based structure repair mortar, starting material comprise: cement, aggregate, silicon ash, unslaked lime, high efficiency water reducing agent, swelling agent; By weight: cement 40-50%, aggregate 45-55%, high efficiency water reducing agent 0.8-1.5%, unslaked lime 1-2%, silicon ash 1-2%, swelling agent 2-6%; Water is the 10-15% of powder gross weight.
2. cement based structure repair mortar as claimed in claim 1 is characterized in that: aggregate adopts two kinds of different sand mechanical stirring of thickness to mix.
3. cement based structure repair mortar as claimed in claim 1 is characterized in that: the weight ratio of fine sand and coarse sand is 1 ~ 4:1 in the step 1) aggregate.
4. cement based structure repair mortar as claimed in claim 1 is characterized in that: the fineness modulus of step 1) coarse sand is 3.8-4.9; The fineness modulus of fine sand is 2.3-3.1.
5. cement based structure repair mortar as claimed in claim 1, it is characterized in that: the fineness of the calcium lime powder in the step 1) is controlled at the 60-100 order, adopts the ratio of unslaked lime: water=1:2.
6. cement based structure repair mortar as claimed in claim 1 is characterized in that: the high efficiency water reducing agent in the step 1) is the 0.8-1.5% of cement weight.
7. cement based structure repair mortar as claimed in claim 1 is characterized in that: the 3-5% of the swelling agent by mass of cement in the step 1).
8. cement based structure repair mortar and preparation method, starting material comprise: cement, aggregate, silicon ash, unslaked lime, high efficiency water reducing agent, swelling agent; Described cement based structure repair mortar and preparation method adopt following rapid:
1) batching: by weight: ordinary Portland cement 40-50%, aggregate 45-55%, high efficiency water reducing agent 0.8-1.5%, unslaked lime 1-2%, silicon ash 1-2%, swelling agent 2-6%; Water is the 10-15% of powder gross weight;
2) powder: cement and aggregate mixed by the said ratio mechanical stirring obtain powder A; Calcium lime powder and silicon ash mix by the said ratio mechanical stirring, obtain powder material B; With powder A and the powder material B ratio by weight 1:0.02-0.04, hand mixing mixes and obtains powder C;
3) solution: will be set by step 1) high efficiency water reducing agent, swelling agent and the water of said ratio are mixed, and hand mixing is even, obtains solution D;
4) with step 2) solution D that obtains of the powder C that obtains and step 3) mixes, and hand mixing is even, promptly makes cement based structure repair mortar of the present invention.
9. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the step 1) aggregate adopts two kinds of different sand mechanical stirring of thickness to mix.
10. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the weight ratio of fine sand and coarse sand is 1 ~ 4:1 in the step 1) aggregate.
11. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the fineness modulus of step 1) coarse sand is 3.8-4.9; The fineness modulus of fine sand is 2.3-3.1.
12. cement based structure repair mortar as claimed in claim 8 and preparation method; It is characterized in that: the fineness of the calcium lime powder in the step 1) is controlled at the 60-100 order; The speed of response requirement, adopt ash: the ratio of water=1:2, heat-up rate 6-12 minute temperature is raised to 75 ℃ from 20 ℃.
13. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the high efficiency water reducing agent in the step 1) is the 0.8-1.5% of cement weight.
14. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the 3-5% of the swelling agent by mass of cement in the step 1).
15. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: step 2) in the mechanical stirring time be 2-5 minute.
16. cement based structure repair mortar as claimed in claim 8 and preparation method is characterized in that: the hand mixing time in step 3), the step 4) is 3-6 minute.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803918A (en) * | 2013-12-20 | 2014-05-21 | 同济大学 | Porcelain powder waste mixed cement-based tiny-expansion crack repairing mortar and using method thereof |
| CN104829197A (en) * | 2015-04-22 | 2015-08-12 | 哈尔滨工程大学 | Bridge floor-repair aqueous polyurethane polymer-modified mortar and preparation method thereof |
| CN106278002A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of concrete duct resistant abrasion mending mortar |
| CN106542785A (en) * | 2016-09-30 | 2017-03-29 | 湖北工业大学 | Repairing concrete crack material and preparation method thereof and using method |
| CN108658550A (en) * | 2018-05-30 | 2018-10-16 | 黄旭东 | A kind of cement base mending mortar and preparation method thereof |
| CN110467397A (en) * | 2019-08-31 | 2019-11-19 | 中国水利水电第五工程局有限公司 | A kind of pre contract mortar and preparation method thereof |
| CN112645648A (en) * | 2021-01-20 | 2021-04-13 | 湖北工建科技产业投资有限公司 | Cement-based structure repair mortar |
| CN113698155A (en) * | 2021-10-12 | 2021-11-26 | 陕西秦汉恒盛新型建材科技股份有限公司 | Green multipurpose quick-setting type repair mortar and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803918A (en) * | 2013-12-20 | 2014-05-21 | 同济大学 | Porcelain powder waste mixed cement-based tiny-expansion crack repairing mortar and using method thereof |
| CN104829197A (en) * | 2015-04-22 | 2015-08-12 | 哈尔滨工程大学 | Bridge floor-repair aqueous polyurethane polymer-modified mortar and preparation method thereof |
| CN106278002A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of concrete duct resistant abrasion mending mortar |
| CN106542785A (en) * | 2016-09-30 | 2017-03-29 | 湖北工业大学 | Repairing concrete crack material and preparation method thereof and using method |
| CN106542785B (en) * | 2016-09-30 | 2019-03-26 | 湖北工业大学 | Repairing concrete crack material and preparation method thereof and application method |
| CN108658550A (en) * | 2018-05-30 | 2018-10-16 | 黄旭东 | A kind of cement base mending mortar and preparation method thereof |
| CN110467397A (en) * | 2019-08-31 | 2019-11-19 | 中国水利水电第五工程局有限公司 | A kind of pre contract mortar and preparation method thereof |
| CN112645648A (en) * | 2021-01-20 | 2021-04-13 | 湖北工建科技产业投资有限公司 | Cement-based structure repair mortar |
| CN113698155A (en) * | 2021-10-12 | 2021-11-26 | 陕西秦汉恒盛新型建材科技股份有限公司 | Green multipurpose quick-setting type repair mortar and preparation method thereof |
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Application publication date: 20120725 |