CN104310909A - Nano modified polymer repair mortar and preparation method thereof - Google Patents
Nano modified polymer repair mortar and preparation method thereof Download PDFInfo
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- CN104310909A CN104310909A CN201410558464.4A CN201410558464A CN104310909A CN 104310909 A CN104310909 A CN 104310909A CN 201410558464 A CN201410558464 A CN 201410558464A CN 104310909 A CN104310909 A CN 104310909A
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Abstract
The invention relates to nano modified polymer repair mortar which comprises the following components by mass percent: 15-25% of cement, 30-50% of quartz sand, 0.4-0.8% of polymer, 0.02-0.04% of a defoaming agent, 0.3-0.6% of nano SiO2, 0.15-0.3% of a water reducing agent and the balance of water, wherein the sum of the components is 100%. A preparation method of the nano modified polymer repair mortar comprises the steps of taking all the components according to the mass fraction ratio; firstly, enabling nano SiO2 dispersion liquid and the polycarboxylic acid water reducing agent to be dissolved in water, and evenly mixing to obtain a mixture; and after that, mixing the cement, the quartz sand, the polymer, the defoaming agent and the mixture in a mixer. According to the prepared nano modified polymer repair mortar, the hydration speed of the repair mortar is remarkably accelerated, and the density of the repair mortar is obviously improved; particularly, the performances of mechanics, durability and construction of the repair mortar can be improved in the environment with relatively low temperature, so that the repair mortar is especially suitable for repairing a reinforced concrete structure.
Description
Technical field
The present invention relates to a kind of preparation method possessing the concrete structure reparation nano modification polymer mortar of early strong and applicable winter low temperature construction function.
Background technology
Polymer cement mortar, as a kind of cement based repair materials of widespread use, has good water-retaining property, bending tensile strength high strong with the cohesive force of original basic unit, is comparatively widely used in the reparation field of concrete structure.But polymer mortar also exists that time of coagulation is long, early strength is low, ultimate compression strength is low, especially cause the problems such as the serious variation of properties when envrionment temperature is down to below 10 DEG C because hydration rate crosses slow.For these problems, efficient manner must be taked to improve the hydration rate, early strength, ultimate compression strength etc. of polymkeric substance repairing mortar under all temps environment, especially mechanics and the endurance quality of repairing mortar under winter low temperature environment is improved, not only be conducive to the shortening of duration and the carrying out of rapid rush-repair engineering, be also conducive to the improvement of polymkeric substance repairing mortar construction quality.
invention Inner holds
The object of the invention is to overcome deficiency of the prior art, a kind of nano modification polymkeric substance repairing mortar and preparation method thereof is provided.
Nano modification polymkeric substance repairing mortar of the present invention, its component and massfraction as follows:
Cement 15% ~ 25%;
Quartz sand 30% ~ 50%;
Polymkeric substance 0.4% ~ 0.8%;
Defoamer 0.02% ~ 0.04%;
Nano-meter SiO_2
20.3% ~ 0.6%;
Water reducer 0.15% ~ 0.3%;
All the other are water, and said components sum is 100%.
In the present invention, described cement is 42.5 grades of silicate cements.
In the present invention, described quartz sand is 16-28 object No. 4 quartz sands and 28-46 object No. 5 quartz sands mixture according to weight ratio 1:1.
In the present invention, described polymkeric substance is ethylene-vinyl acetate copolymer.
In the present invention, the organic silicon polyether composite anti-foaming agent of described defoamer to be non-volatile matter be 24-26%.
In the present invention, described Nano-meter SiO_2
2particle diameter be 30-50nm.
In the present invention, described water reducer is polycarboxylate water-reducer.
The preparation method of nano modification polymkeric substance repairing mortar of the present invention, comprises the following steps:
1) each component is got by the massfraction proportioning of above-mentioned nano modification polymkeric substance repairing mortar; Be the Nano-meter SiO_2 of 30% by water, solid content
2dispersion liquid and solid content are that the polycarboxylate water-reducer of 38-42% is uniformly mixed in advance according to proportioning.
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 4min ~ 6min, obtain nano modification polymkeric substance repairing mortar.
Compared with prior art, the invention has the beneficial effects as follows:
Preparation technology of the present invention is simple, and obtained polymkeric substance repairing mortar is specially adapted to the reparation of skeleton construction.By the modification of nano material in the present invention, the hydration rate of repairing mortar can be significantly improved on the one hand, thus improve its early strength, shorten the duration of a project; The compaction rate of repairing mortar can be significantly improved on the other hand, thus improve its endurance quality; Especially, the mechanics of repairing mortar under lower temperature environments, durable and workability can be improved, make polymer mortar also can keep good performance under northern China and hot-summer and cold-winter area winter construction environment.
Embodiment
Below by way of example, the present invention is further described.
Embodiment 1
1) each component is got by massfraction proportioning: cement 25%; Quartz sand (28 No. 4, object quartz sands and 28 objects No. 5 quartz sands are according to the mixture of weight ratio 1:1) 50%; Polymkeric substance (ethylene-vinyl acetate copolymer) 0.8%; Organic silicon polyether composite anti-foaming agent (non-volatile matter is 26%) 0.04%; Nano-meter SiO_2
20.3%; Polycarboxylate water-reducer 0.3%; All the other are water, and said components sum is 100%.
Be the Nano-meter SiO_2 of 30% by water, solid content
2the polycarboxylate water-reducer of dispersion liquid and solid content 38% is uniformly mixed in advance according to proportioning.
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 5min, obtain nano modification polymkeric substance repairing mortar.
The mortar obtained by aforesaid method is watered and builds up 40*40*160mm test specimen, maintenance at the standard conditions, mechanical property test is carried out according to " polymer-modified cement mortar testing regulation ", contrasting with the intensity by nano modification of nano material will do not added: 1d folding strength is promoted to 3.7MPa from 2.5MPa, increasing degree about 45%; 1d ultimate compression strength is promoted to 12.6MPa from 9.7MPa, increasing degree about 30%.3d folding strength is promoted to 6.5MPa from 5.5MPa, increasing degree about 18%; 3d ultimate compression strength is promoted to 30.0MPa from 26.5MPa, increasing degree about 13%.28d folding strength drops to 10.9MPa from 11.8MPa, the range of decrease 7.6%; The ultimate compression strength of 28d is 61.9MPa and 59.1MPa respectively, the range of decrease 4.5%.
Embodiment 2
1) each component is got by massfraction proportioning: cement 25%; Quartz sand (16 No. 4, object quartz sands and 28 objects No. 5 quartz sands are according to the mixture of weight ratio 1:1) 50%; Polymkeric substance (ethylene-vinyl acetate copolymer) 0.8%; Organic silicon polyether composite anti-foaming agent (non-volatile matter is 26%) 0.04%; Nano-meter SiO_2
20.6%; Polycarboxylate water-reducer 0.3%; All the other are water, and said components sum is 100%.
Be the Nano-meter SiO_2 of 30% by water, solid content
2the polycarboxylate water-reducer of dispersion liquid and solid content 38% is uniformly mixed in advance according to proportioning.
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 4min, obtain nano modification polymkeric substance repairing mortar.
The mortar obtained by aforesaid method is watered and builds up 40*40*160 test specimen, maintenance at the standard conditions, mechanical property test is carried out according to " polymer-modified cement mortar testing regulation ", contrasting with the intensity by nano modification of nano material will do not added: 1d folding strength is promoted to 4.2MPa from 2.5MPa, increasing degree about 62%; 1d ultimate compression strength is promoted to 14.4MPa from 9.7MPa, increasing degree about 48%.3d folding strength is promoted to 5.9MPa from 5.5MPa, increasing degree about 7.3%; 3d ultimate compression strength is promoted to 28.8MPa from 26.5MPa, increasing degree about 8.7%.28d folding strength drops to 8.3MPa from 11.8MPa, the range of decrease 30%; 28d ultimate compression strength drops to 54.3MPa from 61.9MPa, the range of decrease 12%.
Embodiment 3
1) each component is got by massfraction proportioning: cement 15%; Quartz sand (16 No. 4, object quartz sands and 46 objects No. 5 quartz sands are according to the mixture of weight ratio 1:1) 30%; Polymkeric substance (ethylene-vinyl acetate copolymer) 0.4%; Organic silicon polyether composite anti-foaming agent (non-volatile matter is 26%) 0.02%; Nano-meter SiO_2
20.3%; Polycarboxylate water-reducer 0.15%; All the other are water, and said components sum is 100%.
By the Nano-meter SiO_2 of water, solid content 30%
2the polycarboxylate water-reducer of dispersion liquid and solid content 38% is uniformly mixed in advance according to proportioning.
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 4min, obtain nano modification polymkeric substance repairing mortar.
The mortar obtained by aforesaid method is watered and builds up 40*40*160 test specimen, (6 DEG C) maintenance at low ambient temperatures, humidity condition is supported identical with mark, mechanical property test is carried out according to " polymer-modified cement mortar testing regulation ", contrasting with the intensity by nano modification of nano material will do not added: 1d folding strength is promoted to 3.7MPa from 2.7MPa, increasing degree about 37%; 1d ultimate compression strength is promoted to 12.1MPa from 8.3MPa, increasing degree about 46%.3d folding strength is promoted to 4.8MPa from 4.2MPa, increasing degree about 14%; 3d ultimate compression strength is promoted to 19.3MPa from 16.4MPa, increasing degree about 18%.28d folding strength is promoted to 7.8MPa from 7.2MPa, increasing degree about 8.3%; 28d ultimate compression strength is promoted to 52.4MPa from 49.8MPa, increasing degree about 5.2%.
Embodiment 4
1) each component is got by massfraction proportioning: cement 15%; Quartz sand (28 No. 4, object quartz sands and 46 objects No. 5 quartz sands are according to the mixture of weight ratio 1:1) 30%; Polymkeric substance (ethylene-vinyl acetate copolymer) 0.4%; Organic silicon polyether composite anti-foaming agent (non-volatile matter is 26%) 0.02%; Nano-meter SiO_2
20.6%; Polycarboxylate water-reducer 0.15%; All the other are water, and said components sum is 100%.
By the Nano-meter SiO_2 of water, solid content 30%
2the polycarboxylate water-reducer of dispersion liquid and solid content 38% is uniformly mixed in advance according to proportioning.
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 4min, obtain nano modification polymkeric substance repairing mortar.
The mortar obtained by aforesaid method is watered and builds up 40*40*160 test specimen, (6 DEG C) maintenance at low ambient temperatures, humidity condition is supported identical with mark, mechanical property test is carried out according to " polymer-modified cement mortar testing regulation ", contrasting with the intensity by nano modification of nano material will do not added: 1d folding strength is promoted to 4.3MPa from 2.7MPa, increasing degree about 59%; 1d ultimate compression strength is promoted to 13.4MPa from 8.3MPa, increasing degree about 61%.3d folding strength is promoted to 4.5MPa from 4.2MPa, increasing degree about 7.1%; 3d ultimate compression strength is promoted to 18.6MPa from 16.4MPa, increasing degree about 13%.28d folding strength is reduced to 6.8MPa from 7.2MPa, the range of decrease about 5.6%; 28d ultimate compression strength is promoted to 50.7MPa from 49.8MPa, increasing degree about 1.8%.
Method of the present invention, adopts Nano-meter SiO_2
2dispersion liquid carries out modification to polymkeric substance repairing mortar, can effectively promote its early strength, improve the performance that it uses in low temperature environment, thus gives polymkeric substance repairing mortar more extensive and better repairing performance.A large amount of aeration performance is produced in order to prevent mixing of polymkeric substance, be mixed with defoamer to draw bubble, simultaneously because the good dispersion effect of water reducer also can the Beneficial Effect that develop cement early strength of more effective performance nano silicon, thus obtain not only possess early strength high, draw sticky excellent performance, but also have the repair materials of good resistance to low temperature.
What more than enumerate is only specific embodiments of the invention.Obviously, the invention is not restricted to above examples of implementation, in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all should think protection scope of the present invention.
Claims (8)
1. a nano modification polymkeric substance repairing mortar, it is characterized in that its component and massfraction as follows:
Cement 15% ~ 25%;
Quartz sand 30% ~ 50%;
Polymkeric substance 0.4% ~ 0.8%;
Defoamer 0.02% ~ 0.04%;
Nano-meter SiO_2
20.3% ~ 0.6%;
Water reducer 0.15% ~ 0.3%;
All the other are water, and said components sum is 100%.
2. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described cement is 42.5 grades of silicate cements.
3. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described quartz sand is 16-28 object No. 4 quartz sands and 28-46 object No. 5 quartz sands mixture according to weight ratio 1:1.
4. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described polymkeric substance is ethylene-vinyl acetate copolymer.
5. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described defoamer to be non-volatile matter is the organic silicon polyether composite anti-foaming agent of 24-26%.
6. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described Nano-meter SiO_2
2particle diameter be 30-50nm.
7. nano modification polymkeric substance repairing mortar according to claim 1, is characterized in that described water reducer is polycarboxylate water-reducer.
8. prepare the method for nano modification polymkeric substance repairing mortar according to claim 1, it is characterized in that comprising the following steps:
1) each component is got by claim 1 proportioning; Be the Nano-meter SiO_2 of 30% by water, solid content
2dispersion liquid and solid content are that the polycarboxylate water-reducer of 38-42% is uniformly mixed in advance according to proportioning;
2) mixture of cement, quartz sand, polymkeric substance, defoamer and step 1) gained is added in stirrer carry out mix, time 4min ~ 6min, obtain nano modification polymkeric substance repairing mortar.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104628354A (en) * | 2015-02-11 | 2015-05-20 | 浙江大学 | Nano modified self-penetrating water-based repair material and preparation method thereof |
| US9802865B1 (en) | 2016-09-13 | 2017-10-31 | Nano And Advanced Materials Institute Limited | Nano-modified alkali-activated cementitious materials for rapid repair |
| CN108383446A (en) * | 2018-03-15 | 2018-08-10 | 山东大学 | A kind of Ultrastrength cement base repair materials that metal-organic framework materials are modified |
| CN109437753A (en) * | 2018-12-08 | 2019-03-08 | 广州建研科技有限公司 | A kind of inorganic stone and its production technology |
| CN109437659A (en) * | 2018-12-08 | 2019-03-08 | 广州建研科技有限公司 | A kind of inorganic nano stoste |
| CN110642575A (en) * | 2019-11-09 | 2020-01-03 | 韶关市第一建筑工程有限公司 | Machine-sprayed thick-layer polymer repair mortar and preparation method thereof |
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| CN101838494A (en) * | 2010-05-19 | 2010-09-22 | 东莞市金牛有机硅科技有限公司 | Process for preparing permeable building silicon rubber waterproof coating and product thereof |
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2014
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| CN101838494A (en) * | 2010-05-19 | 2010-09-22 | 东莞市金牛有机硅科技有限公司 | Process for preparing permeable building silicon rubber waterproof coating and product thereof |
Non-Patent Citations (1)
| Title |
|---|
| 孟睿覃: "不同温度下纳米SiO2对PMC材料性能和微结构的影响研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104628354A (en) * | 2015-02-11 | 2015-05-20 | 浙江大学 | Nano modified self-penetrating water-based repair material and preparation method thereof |
| US9802865B1 (en) | 2016-09-13 | 2017-10-31 | Nano And Advanced Materials Institute Limited | Nano-modified alkali-activated cementitious materials for rapid repair |
| CN108383446A (en) * | 2018-03-15 | 2018-08-10 | 山东大学 | A kind of Ultrastrength cement base repair materials that metal-organic framework materials are modified |
| CN109437753A (en) * | 2018-12-08 | 2019-03-08 | 广州建研科技有限公司 | A kind of inorganic stone and its production technology |
| CN109437659A (en) * | 2018-12-08 | 2019-03-08 | 广州建研科技有限公司 | A kind of inorganic nano stoste |
| CN110642575A (en) * | 2019-11-09 | 2020-01-03 | 韶关市第一建筑工程有限公司 | Machine-sprayed thick-layer polymer repair mortar and preparation method thereof |
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Application publication date: 20150128 |