CN103273564A - High-performance concrete temperature control and maintenance method under strong wind gobi environment - Google Patents
High-performance concrete temperature control and maintenance method under strong wind gobi environment Download PDFInfo
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Abstract
The invention discloses a high-performance concrete temperature control and maintenance method under a strong wind gobi environment. The method includes the steps of immediately covering a concrete pouring surface with moisturizing materials and spraying water to conduct moisturizing maintenance after concrete pouring surface finishing construction is completed, conducting temperature reduction through a net awning and by spraying water in the day, conducting heat preservation by covering the concrete pouring surface with the moisturizing materials at night, conducting form removal when intensity of poured concrete meets form removal requirements and the central temperature of the concrete starts to be reduced, removing the net awning, meanwhile, covering the concrete pouring surface with the moisturizing materials and spraying water to conduct the maintenance until a suitable age, removing the covered moisturizing materials after water spraying maintenance is completed, and conducting middle and later period maintenance by coating with a curing agent with brushes. The high-performance concrete temperature control and maintenance method under the strong wind gobi environment solves the difficult technical problems of temperature cracking, shrinkage cracking, delayed crazing and performance degradation of concrete under the strong wind gobi environment with the high-temperature characteristic, the dry characteristic, the strong wind characteristic and the large temperature difference characteristic.
Description
Technical field
The present invention relates to a kind of concrete temperature control and maintenance process, particularly temperature control and the maintenance process of high performance concrete under the environment of a kind of high wind Gobi desert belongs to the concrete technology field.
Background technology
Some areas, province climatic environments such as the western Xinjiang of China, Gansu are extremely abominable, and newly-built concrete works is faced with great test.Be example with newly built railway Lanzhou to Urumchi second two-wire red building river to Hami Duan Zhanqian engineering the 2nd bid section, it is domestic that this bid section circuit all is positioned at Hami City, circuit institute is arid continental climate district, temperate zone in the area belongs to, and approach cigarette Dun Feng district is with dry, rainfall is little, ice period is long, and day and night temperature is big, spring and autumn many high wind, summer is very brief and hot, and winter, very long and severe cold was its principal character.Annual January is the coldest, and July is the hottest, the hottest month poor (annual temperature range) more greatly 37.2 ℃ with the coldest month temperature on average, and the extreme highest temperature is 43 ℃, and extremely lowest temperature is-32 ℃, and extreme maximum temperature difference per day is more than 25 ℃; Annual precipitation is less than 40mm, and annual evaporation total amount is about 2800mm, and evaporation capacity is about 80 times of rainfall, average of the whole year relative humidity 30%～40%; Instantaneous maximum wind surpasses 40m/s, can reach 13 grades, and the whole year, day with wind of gale force concentrated on for 3～August about 90 days more than 8 grades.
This be under the high wind Gobi desert environment of feature with high temperature, drying, high wind and the big temperature difference, particularly for members such as structural section complexity, unidirectional large size prefabricated T beam and large volume pier shafts, concrete very easily forms the serious deterioration that contraction fissure, thermal cracking, later stage are huddled up the crack and every performance is taken place.In addition, for prefabricated T beam and pier shaft, standard is to core temperature and temperature difference requirement strictness, and is specific as follows: require between curing period the temperature difference between the concrete core and top layer, top layer and environment should not surpass 20 ℃ (beam body concretes should not above 15 ℃); Concrete core temperature is the highest should not be greater than 70 ℃ (beam body concretes should not greater than 60 ℃).Adopting which kind of temperature control and maintenance measure, is the key that addresses the above problem, and also is a great problem that the Lanzhou-Xinjiang second two-wire high performance concrete faces.
Temperature control method commonly used behind the present domestic casting of concrete in mass is surface heat preservation, but because environment temperature is above 40 ℃ under the environment of high wind Gobi desert, and this kind temperature control method further raises concrete core temperature on the contrary, uses also improper at this; And domestic maintenance process commonly used at present is water curing and sealed maintenance method, but these two kinds of maintenance process required curing periods, are longer, and very easily blown open by high wind owing to curing water under the environment of high wind Gobi desert very easily evaporates, seals with plastic sheeting, required manpower is more, maintenance effect can not guarantee, and can not prevent the be full of cracks in later stage, can not satisfy concrete curing requirements under this mal-condition.Therefore developing under the environment of a kind of high wind Gobi desert reasonably concrete temperature control and maintenance measure is the key that guarantees concrete quality under this environmental condition.
Summary of the invention
The purpose of this invention is to provide temperature control and the maintenance process of high performance concrete under the environment of a kind of high wind Gobi desert, to overcome the deficiencies in the prior art, solve thermal cracking, contraction fissure, delayed crazing and the performance degradation problem of high performance concrete under the environment of high wind Gobi desert.
The objective of the invention is to be achieved through the following technical solutions.
Temperature control and the maintenance process of high performance concrete is characterized in that under the environment of a kind of high wind Gobi desert, after concreting is received surface construction and finished, cover material which can retain moisture immediately and moisture-keeping maintaining is carried out in watering; Adopt daytime mode sunshade mesh shed and watering to lower the temperature, adopt night the mode of covering insulation material to be incubated; When the concrete strength of building reaches that form removal requires and the concrete central temperature is carried out form removal when beginning to lower the temperature, and remove sunshade mesh shed, cover material which can retain moisture simultaneously and the maintenance of sprinkling water to the suitable length of time; The watering maintenance finishes the back and removes the covering material which can retain moisture, brushes sealing compound and carries out the middle and later periods maintenance.
Described high wind Gobi desert environment refers to the climatic environment of features such as high temperature, drying, high wind and the big temperature difference.
Described high performance concrete is a kind of novel High Technique Concrete, is the concrete that adopts the modern concrete fabrication techniques on the basis that increases substantially the normal concrete performance.It, guarantees emphasis such as durability, workability, applicability, intensity and volume stabilities at different purposes requirements with the leading indicator of durability as design.For this reason, high performance concrete generally adopts high-quality raw material, adds mineral admixture and high efficiency water reducing agent, and takes low water binder ratio formulated.The general desired strength grade of high performance concrete is more than C40 reaches, and electric flux is less than 1500C, and frost resistance is greater than 300 circulations.
The component of described high performance concrete and constituent content are: additive 4.0-5.0kg/m
3, water consumption 145-160kg/m
3, sand 600-750kg/m
3, rubble 1000-1100kg/m
3With Binder Materials 420～500kg/m
3, wherein, in the gross mass of gel rubber material, the quality percentage composition of each component is in the gel rubber material:
Flyash 10～30%;
Breeze 15～50%.
Preferably, the component of described high performance concrete and constituent content are: additive 4.25-4.9kg/m
3, sand 720-728kg/m
3, rubble 1080-1047kg/m
3, Binder Materials 420～590kg/m
3, water-cement ratio 0.315～0.365.
Preferably, in the gross mass of gel rubber material, the quality percentage composition of each component is in the gel rubber material:
Flyash 10～15%;
Breeze 15～20%.
Described material which can retain moisture is selected from geotextiles, plastic sheeting and water-saving moisturizing film.
Describedly sunshade mesh shedly refer to that with reinforcing bar as skeleton, with the sunshade screen cloth a kind of sunshade as sun shading material, both sunshading and temperature reducing prevented again that high wind from blowing down.
Described insulation material is selected from cotton-wadded quilt, geotextiles, canvas and oilcloth.
Described sealing compound is to be selected from acrylic compounds, water-borne acrylic type, polygalacto matrix class, synthetic resin and modified acrylic acid sealing compound.Preferably, sealing compound is selected from acrylic acid-methyl acrylate-methyl methacrylate copolymer emulsion, acrylic acid-methyl acrylate-ethylene copolymerization emulsions, polyacrylic acid-paraffin wax emulsions blend, ethylene-vinyl acetate copolymer emulsion and neoprene latex.
Described form removal and to remove the sunshade mesh shed time be after the concreting 2～5 days is preferably 3 days.
Refer to after the concreting 6～9 days in covering material which can retain moisture of the present invention and maintenance to the suitable length of time of sprinkling water, be preferably 7 days.
Temperature control and the maintenance process of high performance concrete have following beneficial effect under the environment of disclosed high wind of the present invention Gobi desert:
(1) applicability is strong, is applicable to temperature control and the maintenance of various concrete components under high temperature, drying, high wind and the big temperature difference Gobi desert environment;
(2) use the sunshade screen cloth as sun shading material, both can stop sun direct projection to cause the temperature of concrete component to raise, can prevent that again high wind from blowing down sunshade;
(3) all are sunshade mesh shed, geotextiles and waterproof canvas etc. all can have enough to meet the need recycling;
(4) watering curing period shorter, both can save water resource and human resources, can guarantee maintenance effect again;
(5) disposable brushing sealing compound carries out the later stage maintenance to concrete, and the concrete component behind the brushing sealing compound can directly be exposed in the natural environment, and is easy to operate, has reduced the cost of labor of long-term watering maintenance;
(6) technical barrier of concrete thermal cracking, contraction fissure, delayed crazing and performance degradation under the high wind Gobi desert environment that to have solved with high temperature, drying, high wind and the big temperature difference be feature.
Description of drawings
Fig. 1 is the temperature control of high performance concrete under the environment of high wind Gobi desert and the flow chart of maintenance;
Fig. 2 is the temperature control result of the test of covering and heat insulating maintenance process commonly used;
Fig. 3 is temperature control method test result of the present invention;
Fig. 4 is beam body core boring sampling picture;
Fig. 5 is the concrete sample electron scanning micrograph of covering and heat insulating commonly used and watering moisture-keeping maintaining, is that (a) is for amplifying 1000 times apart from surperficial 1cm place among the figure; (b) be to amplify 10000 times apart from surperficial 1cm place;
Fig. 6 is the concrete sample electron scanning micrograph of maintenance of the present invention, and (a) amplifies 1000 times apart from surperficial 1cm place among the figure, (b) is to amplify 10000 times apart from surperficial 1cm place.
The specific embodiment
Further set forth the present invention below in conjunction with specific embodiment, should be understood that these embodiment only are used for explanation the present invention and are not used in restriction protection scope of the present invention.
Concrete component: newly built railway Lanzhou to Urumchi second two-wire red building river to Hami Duan Zhanqian engineering the 2nd bid section cigarette Dun Feng district large volume pier shaft.This concrete mixture ratio and main match ratio parameter see Table 1.
Table 1 pier shaft concrete mix and main match ratio parameter
Concrete temperature control and maintenance scheme are: after the concreting, lower the temperature with sunshade mesh shed covering and watering daytime, covering waterproof canvas night is incubated, form removal and remove sunshade mesh shed behind the concreting 3d, coat geotextiles and plastic sheeting simultaneously, geotextiles and plastic sheeting are removed in the maintenance of sprinkling water behind the concreting 7d, brush sealing compound.
The concrete construction time is in September, 2010, evening, 11:00 began concreting, atmospheric temperature is 25 ℃ before building, relative humidity is 25%, 27 ℃ of concrete molding temperatures, 29 ℃ of die plate temperature, the same day, the lowest temperature was 6 ℃, 38 ℃ of the highest temperatures have high wind more than 10 grades in January after the concreting.
Concrete temperature control and maintenance construction operation and points for attention:
(1) after operations such as the formwork erection of large volume pier shaft, reinforcing bar binding finish, lay concrete component core, top layer and environment temperature temperature element, set up sunshade mesh shed skeleton, around the pier shaft and top and sunshade mesh shed distance all should be greater than 1m.
(2) during concreting, important parameters such as detail record raw material temperature, die plate temperature, environment temperature, concrete temperature, concrete slump, slump-loss and concrete 's air-containing.
(3) after concreting finishes, connect the temperature measurement data line, continue to carry out temperature test before the form removal.
(4) after concreting finishes, set up sunshade mesh shed screen cloth, simultaneously to template and the ground cooling moisture-retaining of sprinkling water.
(5) the pier shaft end face is wiped one's face after construction finishes, and covers geotextiles immediately, and continues watering and preserve moisture.
(6) before the form removable, cover waterproof canvas night and be incubated, open the canvas heat radiation daytime.
(7) concreting is after 3 days, form removal, and remove sunshade mesh shed.
(8) the concrete pier shaft after the form removal should cover geotextiles and plastic sheeting immediately, and lasting watering is preserved moisture.
(9) concreting removed geotextiles and plastic sheeting after 7 days, stopped watering, carried out the removing surface of concrete pier shaft immediately, and brushed three auspicious C type sealing compounds.
(10) after sealing compound was brushed, the concrete pier shaft directly was exposed in the natural environment.
Construction effect: adopt the present invention to carry out temperature control and the maintenance of pier shaft, concrete core temperature is up to 68 ℃, and core table maximum temperature difference, table ring maximum temperature difference are respectively 14.4 ℃ and 13.9 ℃, and concrete surface layer does not have early crack, later stage does not almost have be full of cracks, satisfies related specifications and designing requirement.
Embodiment 2
The construction object that present embodiment is selected is the prefabricated T beam of newly built railway Lanzhou to Urumchi second two-wire red building river to Hami Duan Zhanqian engineering the 2nd mark Hami precasting yard, compare with domestic temperature control commonly used at present and maintenance scheme by temperature control of the present invention and maintenance scheme, the implementation result of temperature control of the present invention and maintenance scheme is described.
Table 2 prefabricated T beam concrete mix and main match ratio parameter
Prefabricated T beam span is 16m, and concrete mix sees Table 2.The concrete construction time is in September, 2010, morning, 8:00 began concreting, atmospheric temperature is 23 ℃ before building, relative humidity is 20%, 26 ℃ of concrete molding temperatures, 28 ℃ of die plate temperature, the same day, the lowest temperature was 4 ℃, 41 ℃ of the highest temperatures have high wind more than 10 grades in January after the concreting.
(1) temperature control and maintenance contrast test scheme
Temperature control and maintenance contrast test scheme see Table 3.
Table 3 temperature control and maintenance contrast test scheme
(2) the early stage temperature control comparative test result of prefabricated T beam
Fig. 2 and Fig. 3 are for adopting the temperature test result of the prefabricated T beam of two kinds of temperature control methods respectively, as seen from the experiment, adopt the waterproof canvas insulation of covering to carry out the temperature control of prefabricated T beam, after the concreting in 3 days, the ambient temperature range that records is 30 ℃～50 ℃, the core maximum temperature is 68 ℃, and table ring maximum temperature difference can not meet the demands greater than 20 ℃.And adopt the temperature control measures of cooling on daytime of the present invention and night insulation, the environment temperature of building prefabricated T beam after 3 days is down between 20 ℃～35 ℃, the core maximum temperature is reduced to 54 ℃, and core table maximum temperature difference, table ring maximum temperature difference all are down to below 15 ℃, satisfy code requirement.Think, insulated curing commonly used is not suitable for concrete temperature control under the environment of high wind Gobi desert, concrete temperature control emphasis is to take cooling measure daytime during high temperature under the environment of high wind Gobi desert, take the insulation measure night during low temperature, both are in conjunction with the high ambient temperature that could reduce member significantly, and then reduce concrete core temperature significantly, dwindle the core table temperature difference and the table ring temperature difference, thereby reduce the risk in occurrence temperature crack.
(3) crack situation comparative test result
Carry out crack situation observation after 28 days and 2 years respectively at the maintenance of prefabricated T beam, observed result sees Table 4.As seen from the experiment, the crack of different length appears in the prefabricated T beam of covering and heat insulating maintenance commonly used and watering moisture-keeping maintaining in the time of 28 days, and particularly Number of Fractures increases considerably after 2 years, and fracture length also increases substantially, and be full of cracks is serious; And the maintenance measure of adopting lower the temperature the daytime of the present invention temperature control measures of night insulation and the maintenance later stage sealing compound maintenance of sprinkling water in early days to combine, prefabricated T beam free from flaw occurs in the time of 28 days, and still basic free from flaw and be full of cracks occur after 2 years.This explanation, temperature control and maintenance measure that the present invention adopts, not only better controlled the early stage thermal cracking of concrete, contraction fissure, and the maintenance of later stage sealing compound is fine has controlled dry shrinkage of concrete crack and be full of cracks.
Table 4 crack comparative test result
(4) mechanical property comparative test result
The results are shown in Table 5 with the condition maintenance concrete sample compressive strength test that keeps sample.As seen from the experiment, with respect to covering and heat insulating commonly used and watering moisture-keeping maintaining method, the high 1.5MPa of intensity when adopting the concrete sample 3d that the inventive method carries out maintenance, the later stage is higher, the high 3.5MPa of intensity during 28d, the high 3.8MPa of intensity during 56d.Therefore, the present invention has played certain effect for the raising of mechanical performance of concrete.
Table 5 is with the condition maintenance concrete sample compressive strength test result that keeps sample
(5) comparative test result of endurance quality
When the beam body is built back 15 months, the beam body is carried out core boring sampling, test concrete charge pass and chloride diffusion coefficient, the core boring sampling picture is seen Fig. 4, result of the test sees Table 6.As seen from the experiment, with respect to covering and heat insulating commonly used and watering moisture-keeping maintaining method, temperature control and maintenance process that the present invention adopts, can reduce concrete electric flux, and reduce concrete chloride diffusion coefficient, concrete electric flux is 1224C in the time of 15 months, and concrete RCM method diffusion coefficient drops to 1.49 * 10
-12m
2/ s.Improved concrete durability.
Table 6 beam body concrete endurancing result
(6) microscopic test comparative analysis
Beam body surface layer concrete carries out the SEM micro-analysis during to 15 months, adopt the concrete scanning electron microscope analysis picture of covering and heat insulating commonly used and watering moisture-keeping maintaining to see Fig. 5, adopt the concrete scanning electron microscope analysis picture of temperature control of the present invention and maintenance measure maintenance to see Fig. 6.As seen from the experiment, the transition region microcrack is all very serious between the prefabricated T beam top layer concrete hydrating product of the covering and heat insulating that employing is commonly used and watering moisture-keeping maintaining and aggregate, and hydrated product is also more loose; And adopt temperature control maintenance method of the present invention, concrete hydrating product transition region with between aggregate to be combined closely, do not have microcrack, and hydrated product is very closely knit.
(7) conclusion (of pressure testing)
Adopt temperature control of the present invention and maintenance measure that prefabricated T beam under the environment of high wind Gobi desert is carried out maintenance, controlled concrete core temperature, the core table temperature difference and the table ring temperature difference preferably; Promoted cement aquation, improved concrete microstructure, improved concrete packing, improved concrete intensity and durability, thereby concrete early crack and delayed crazing risk have been reduced, the worldwide technological puzzle of distress in concrete under the high wind Gobi desert environment that to have solved with high temperature, drying, high wind and the big temperature difference be feature is a kind of comparatively desirable solution with temperature control and the maintenance process of distress in concrete under high temperature, drying, high wind and the big temperature difference high wind Gobi desert environment that is feature.
(8) should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (9)
1. temperature control and the maintenance process of high performance concrete under the high wind Gobi desert environment is characterized in that described temperature control and maintenance process are: after concreting is received surface construction and finished, cover material which can retain moisture immediately and moisture-keeping maintaining is carried out in watering; Adopt daytime mode sunshade mesh shed and watering to lower the temperature, adopt night the mode of covering insulation material to be incubated; When the concrete strength of building reaches that form removal requires and the concrete central temperature is carried out form removal when beginning to lower the temperature, and remove sunshade mesh shed, cover material which can retain moisture simultaneously and the maintenance of sprinkling water to the suitable length of time; The watering maintenance finishes the back and removes the covering material which can retain moisture, brushes sealing compound and carries out the middle and later periods maintenance.
2. temperature control and the maintenance process of high performance concrete under the environment of high wind as claimed in claim 1 Gobi desert is characterized in that the component of described high performance concrete and constituent content are: additive 4.0-5.0kg/m
3, water consumption 145-160kg/m
3, sand 600-750kg/m
3, rubble 1000-1100kg/m
3With Binder Materials 420～500kg/m
3, wherein, in the gross mass of gel rubber material, the quality percentage composition of each component is in the gel rubber material:
Cement 30～75%;
Flyash mixes 10～30%;
Breeze mixes 15～50%.
3. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1 is characterized in that described material which can retain moisture is selected from geotextiles, plastic sheeting and water-saving moisturizing film.
4. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1 is characterized in that, described sunshade mesh shed referring to reinforcing bar as skeleton, with the sunshade screen cloth a kind of sunshade as sun shading material.
5. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1 is characterized in that described insulation material is selected from cotton-wadded quilt, geotextiles, canvas and oilcloth.
6. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1, it is characterized in that described sealing compound is to be selected from acrylic compounds, water-borne acrylic type, polygalacto matrix class, synthetic resin and modified acrylic acid sealing compound.
7. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1 is characterized in that, described form removal and to remove the sunshade mesh shed time be after the concreting 2～5 days.
8. temperature control and the maintenance process of high performance concrete under a kind of high wind Gobi desert environment described in claim 1 is characterized in that, refers to after the concreting 6～9 days in described covering material which can retain moisture and maintenance to the suitable length of time of sprinkling water.
9. as the temperature control of high performance concrete under the environment of the arbitrary described high wind of claim 1-8 Gobi desert and the maintenance process application in concrete field.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978547A (en) * | 2014-06-04 | 2014-08-13 | 中国化学工程第三建设有限公司 | Long-wall structure concrete curing device and curing method thereof |
| CN104960088A (en) * | 2015-06-16 | 2015-10-07 | 乌海市公路工程有限公司 | Method for improving curve box girder appearance quality in high-temperature-difference region |
| CN107700488A (en) * | 2017-11-03 | 2018-02-16 | 山东水总有限公司 | A kind of tide-block sluice gate pier mass concrete insulated curing method and device |
| CN107967015A (en) * | 2017-12-29 | 2018-04-27 | 中国水利水电科学研究院 | Concrete environmental control system and method |
| CN110130664A (en) * | 2019-04-02 | 2019-08-16 | 上海大学 | A kind of mass concrete maintenance process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181663A (en) * | 2002-11-29 | 2004-07-02 | Ps Mitsubishi Construction Co Ltd | Manufacturing method for super-high strength precast concrete member |
| CN102029645A (en) * | 2010-10-25 | 2011-04-27 | 兰州交通大学 | Method for maintaining high-performance concrete under severe environment |
-
2013
- 2013-05-30 CN CN201310210817.7A patent/CN103273564B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181663A (en) * | 2002-11-29 | 2004-07-02 | Ps Mitsubishi Construction Co Ltd | Manufacturing method for super-high strength precast concrete member |
| CN102029645A (en) * | 2010-10-25 | 2011-04-27 | 兰州交通大学 | Method for maintaining high-performance concrete under severe environment |
Non-Patent Citations (2)
| Title |
|---|
| 于本田 等: "兰新铁路第二双线高性能混凝上施工质量的控制措施", 《工程质量》, vol. 29, no. 5, 31 May 2011 (2011-05-31), pages 6 - 11 * |
| 党振峰 等: "强风、大温差、戈壁环境风蚀高性能混凝土养护施工技术研究", 《甘肃科技纵横》, vol. 40, no. 2, 28 February 2011 (2011-02-28), pages 133 - 137 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978547A (en) * | 2014-06-04 | 2014-08-13 | 中国化学工程第三建设有限公司 | Long-wall structure concrete curing device and curing method thereof |
| CN104960088A (en) * | 2015-06-16 | 2015-10-07 | 乌海市公路工程有限公司 | Method for improving curve box girder appearance quality in high-temperature-difference region |
| CN107700488A (en) * | 2017-11-03 | 2018-02-16 | 山东水总有限公司 | A kind of tide-block sluice gate pier mass concrete insulated curing method and device |
| CN107967015A (en) * | 2017-12-29 | 2018-04-27 | 中国水利水电科学研究院 | Concrete environmental control system and method |
| CN110130664A (en) * | 2019-04-02 | 2019-08-16 | 上海大学 | A kind of mass concrete maintenance process |
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