CN104086147A - Reinforcing mortar special for wharf concrete structure - Google Patents
Reinforcing mortar special for wharf concrete structure Download PDFInfo
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- CN104086147A CN104086147A CN201410239189.XA CN201410239189A CN104086147A CN 104086147 A CN104086147 A CN 104086147A CN 201410239189 A CN201410239189 A CN 201410239189A CN 104086147 A CN104086147 A CN 104086147A
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Abstract
A disclosed reinforcing mortar special for a wharf concrete structure is characterized by comprising the compositions: portland cement, calcium sulphoaluminate cement, dihydrate gypsum, silica fume, fly ash, a super-plasticizer, a retarder, an antifoaming agent, crack-resistant fiber and different granularity-grade mixing sands. A hydrated product is compact in structure and is capable of effectively resisting permeation destroying of steam, carbon dioxide and chloride ion in marine environment; by employing special cement as a main gelling material, the reinforcing mortar is capable of resisting corrosion destroying of sulfates in seawater; the reinforcing mortar has good injection application property and quick-setting early-strength characteristic, and does not influence normal operation of wharfs when construction is performed; and the reinforcing mortar is excellent in early-stage plastic shrinkage performance and later-stage crack resistance, high in volume stability and relatively good in durability.
Description
Technical field
The invention belongs to concrete structure reinforcement building material field, be specifically related to the special reinforcing mortar of a kind of concrete structure of wharf.
Background technology
Concrete structure of wharf is the environment in humidity or alternation of wetting and drying for a long time, and continues to be subject to the erosion of villaumite and vitriol in ocean, more subjects to corrosion and destroys in advance compared with the concrete structure in normal atmospheric environment.The reinforcement technique of concrete structure of wharf, has obvious difference with the structural strengthening in normal atmospheric environment, should consider emphatically security and the weather resistance of follow-up working life of inner structure, to avoid under harsh environmental activity, and the inefficacy in advance of reinforcement system.Therefore, in the time of research reinforcement technique, should consider the weather resistance of reinforcement material self, guarantee that again the one-piece construction after reinforcing has good security and weather resistance.
Wire rope net sheet---spray reinforcing mortar surface layer reinforcement process and there is the advantages such as operation is simple, mechanization degree is high, labour intensity is low, reliable in quality, in concrete structure reinforcement engineering under normal atmospheric environment, obtained general application, injection is wherein reinforced mortar performance and is had decisive role for the weather resistance of reinforcement system.In concrete structure of wharf is reinforced, reinforcing mortar used under normal atmospheric environment simply can not be transplanted, and should take into full account execution conditions and environmental impact factor, the composition of design reinforcement mortar scientifically and rationally, to meet the basic demand of reinforcement system weather resistance.
Summary of the invention
The object of the present invention is to provide the special reinforcing mortar of a kind of concrete structure of wharf, meet in the residing erosion environment condition of harbour concrete, reinforce the requirement of self weather resistance and the reinforcement system overall durability of mortar.
The present invention is achieved by the following technical solutions:
The special reinforcing mortar of a kind of concrete structure of wharf, its composition comprises silicate cement, calcium sulphoaluminate cement, dihydrate gypsum, silicon ash, flyash, superplasticizer, retardant, defoamer, anti-crack fiber, graded sand, described each composition by mass percentage:
Preferably, described silicate cement is high sulfate resisting silicate cement.
Preferably, described aluminosulfate cement is fast gravity die aluminosulfate cement.
Preferably, the activated grammite that described silicon ash is greater than 90% for silicon-dioxide effective content.
Preferably, described flyash is the low calcium fly ash of II level.
Preferably, described superplasticizer is efficient polycarboxylate water-reducer.
Preferably, described retardant is boric acid or borax.
Preferably, described defoamer is organosilane defoamer.
Preferably, described anti-crack fiber is that filament diameter is 30 μ m, the polyvinyl alcohol staple fibre that length is 5mm～6mm.
Preferably, described graded sand is the 30-100 order clean water washed-out sand of particle diameter continuous distribution.
Principle of the present invention: harbour concrete is the environment in humidity or alternation of wetting and drying for a long time, and continue to be subject to the erosion of villaumite and vitriol in ocean, therefore reinforce the water-cement ratio (0.28～0.32) of mortar by reduction, eliminate mortar and mix and stir the bubble of introducing in process, the compactness of strengthen mortar internal structure, effectively prevents the infiltration of outside moisture, carbonic acid gas, chlorion and sulfate ion; Vitriol in ocean is to cause cement based to reinforce the principal element of mortar generation secondary ettringite expansion damage, by adopting high sulfate resisting silicate cement, and compound with aluminosulfate cement and dihydrate gypsum, reinforce the alkali content in mortar and the aluminate content that can react with vitriol and significantly reduced, the ability that reinforcing mortar is resisted sulphate attack improves greatly; The impact that the strengthening construction of concrete structure of wharf is subject to harbour uninterruptedly runs the many factors such as demand and tidal fluctuations, this operating efficiency that just requires to reinforce mortar is high, gain in strength is fast, in reinforcing mortar, add silicon ash, pumping and thixotropy are not only improved, meet the demand of efficient mechanical sprayed construction, and under the synergy of calcium sulphoaluminate cement and dihydrate gypsum component, further the early strength of strengthen mortar, improves early stage anti-plastic cracking and post compensation shrinkage; Polyvinyl alcohol fiber can form stronger chemical bonding effect with mortar matrix, the low calcium fly ash of secondary is conducive to reduce polyvinyl alcohol fiber too high slippage hardening effect of script in matrix, reduce the shaving effect of matrix to fiber, therefore significantly strengthen the later stage cracking resistance ability of reinforcing mortar, further improved the weather resistance of reinforcing mortar.
Harbour concrete is through life-time service, the hydration reaction of material inside finishes substantially, the dry shrinkage causing thus can be ignored, cubic deformation is only subject to ambient temperature and humidity variable effect, and newly-increased reinforcing mortar water cement ratio is lower, the aquation time length is longer, the cubic deformation that consequent chemical shrinkage and dry shrinkage cause is larger, interface formation additional stress will reinforced, affect the stability of reinforcement system, therefore the cubic deformation of reinforced material must be consistent with substrate concrete, and guarantee reinforcement system has good physical mechanics compatibility.By add the compensate for shrinkage component of aluminosulfate cement and dihydrate gypsum composition in reinforcing mortar, can in reinforcing mortar, form expansion component ettringite, effective compensation is reinforced the volumetric shrinkage of mortar, thereby reduce the additional stress of reinforcing interface, the volume stability of strengthen mortar and reinforcement system.
The special reinforcing mortar of a kind of concrete structure of wharf of the present invention has following beneficial effect:
(1) aquation resultant compact structure, can effectively resist the perviousness of steam in ocean environment, carbonic acid gas and chlorion and destroy;
(2) adopting special cement is main gelling material, can resist the erosion damage of vitriol in seawater;
(3) there is good sprayed construction and quick setting early strength characteristic, when construction, do not affect harbour and normally run;
(4) early stage anti-plastic shrinkage and later stage anti-cracking performance excellence, volume stability is high, and weather resistance is better.
Embodiment
Below embodiments of the invention are elaborated: the present embodiment is implemented under taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1:
The special reinforcing mortar of a kind of concrete structure of wharf, its each constituent mass per-cent is as follows:
Embodiment 2:
The special reinforcing mortar of a kind of concrete structure of wharf, its each constituent mass per-cent is as follows:
According to the method for above two embodiment, and select concrete representative on market to spray and reinforce mortar product sample as a comparison, under same condition construction, maintenance and testing method, obtain performance data and be described below shown in table 1:
Table 1
As seen from the above table, the early strength of the special reinforcing mortar of concrete structure of wharf is higher, less on the impact of the normal operation of harbour; The limited expansion rate of reinforcing mortar meets the related request to shrinkage compensated concrete in " Technical code for application of admixture in concrete " GB50119-2003 with restriction shrinking percentage, and volume stability is better; Because the water cement ratio of reinforcing mortar is very low, the anti-permeability strength of mortar is very high; The resisting erosion of sulfate coefficient of reinforcing mortar is very high, and the vitriol in seawater is had to good anticorrosion effect.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. the special reinforcing mortar of concrete structure of wharf, it is characterized in that, its composition comprises silicate cement, calcium sulphoaluminate cement, dihydrate gypsum, silicon ash, flyash, superplasticizer, retardant, defoamer, anti-crack fiber, graded sand, described each composition by mass percentage:
2. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described silicate cement is high sulfate resisting silicate cement.
3. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described aluminosulfate cement is fast gravity die aluminosulfate cement.
4. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, the activated grammite that described silicon ash is greater than 90% for silicon-dioxide effective content.
5. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described flyash is the low calcium fly ash of II level.
6. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described superplasticizer is efficient polycarboxylate water-reducer.
7. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described retardant is boric acid or borax.
8. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described defoamer is organosilane defoamer.
9. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described anti-crack fiber is that filament diameter is 30 μ m, the polyvinyl alcohol staple fibre that length is 5mm～6mm.
10. the special reinforcing mortar of a kind of concrete structure of wharf according to claim 1, is characterized in that, described graded sand is the 30-100 order clean water washed-out sand of particle diameter continuous distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410239189.XA CN104086147A (en) | 2014-03-20 | 2014-05-30 | Reinforcing mortar special for wharf concrete structure |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105538.9A CN103864393A (en) | 2014-03-20 | 2014-03-20 | Special reinforcing mortar for wharf concrete structure |
| CN201410105538.9 | 2014-03-20 | ||
| CN201410218791 | 2014-05-22 | ||
| CN201410218791.5 | 2014-05-22 | ||
| CN201410239189.XA CN104086147A (en) | 2014-03-20 | 2014-05-30 | Reinforcing mortar special for wharf concrete structure |
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| CN104086147A true CN104086147A (en) | 2014-10-08 |
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| CN201410239189.XA Pending CN104086147A (en) | 2014-03-20 | 2014-05-30 | Reinforcing mortar special for wharf concrete structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073076A (en) * | 2022-05-31 | 2022-09-20 | 四川能达工程检测有限公司 | Sulfate erosion resistant mortar and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255042A (en) * | 2008-04-11 | 2008-09-03 | 清华大学 | Mortar and concrete modified by emulsified asphalt |
| CN101941824A (en) * | 2010-08-10 | 2011-01-12 | 上海宝元化学建材有限公司 | Self-leveling mortar of composite cement |
-
2014
- 2014-05-30 CN CN201410239189.XA patent/CN104086147A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255042A (en) * | 2008-04-11 | 2008-09-03 | 清华大学 | Mortar and concrete modified by emulsified asphalt |
| CN101941824A (en) * | 2010-08-10 | 2011-01-12 | 上海宝元化学建材有限公司 | Self-leveling mortar of composite cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073076A (en) * | 2022-05-31 | 2022-09-20 | 四川能达工程检测有限公司 | Sulfate erosion resistant mortar and preparation method thereof |
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Application publication date: 20141008 |
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