CN101503284B - Anti-erosion agent and masonry mortar material containing the same - Google Patents
Anti-erosion agent and masonry mortar material containing the same Download PDFInfo
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- CN101503284B CN101503284B CN200910058596XA CN200910058596A CN101503284B CN 101503284 B CN101503284 B CN 101503284B CN 200910058596X A CN200910058596X A CN 200910058596XA CN 200910058596 A CN200910058596 A CN 200910058596A CN 101503284 B CN101503284 B CN 101503284B
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Abstract
The invention discloses an erosion-resisting agent, comprising the following compositions in portion by weight: 100 portions of fly ash, 5 to 20 portions of PVA resin, 0.5 to 2 portions of OP addition agent, and 1 to 10 portions of oxalic acid or borate. The erosion-resisting agent of the invention can effectively resist erosion of environmental water (including acidic rain water which contains SO4<2->, HCO3<->, H<+>, Mg<+2>, NH4<+> and other erosive ions and alkali metal salt thereof and which has pH lower than 5), can effective improve the performance of sulphate resisting crystal of masonry mortar with larger cement water ratio, and can meet the requirement of environmental water erosion resistance of the mortar rubble pulp. The invention also discloses a masonry mortar material for the mortar rubble containing the erosion-resisting agent, has excellent performance of environmental water erosion resistance, and can greatly improve the durability of a side slope protection structure in environmental water erosion resistance.
Description
Technical field
The present invention relates to material of construction, especially a kind of anti-Environmental Water erosive anti-erosion agent and contain the masonry mortar material of this anti-erosion agent.
Background technology
In the draining (waterways, lateral sulcus) and slope supporting and protection works (mortar rubble masonry pavement) along the line of railway, highway; Usually to use the mortar flag stone masonry structure; It is a kind of masonry structure with masonry of cement mortar sheet or block stone material; Protecting the domatic erosion that does not receive extraneous factor, or reinforce domatic in case sloping body landing causes disaster accident.
Masonry structure in the side slope protection engineering generally contacts with soil, rock stratum and underground water; Owing to build composition and the cellular structure characteristics of masonry structure by laying bricks or stones with sand-cement slurry; When containing corrosive mediums such as vitriol, carbonate, water in these ground; Masonry mortar will receive the erosion of these surrounding mediums and cause the variation of composition, structure and the deterioration of use properties, has a strong impact on the service life and the traffic safety of mortar flag stone masonry structure thing in the side slope protection engineering.Because these corrosive mediums have bigger water-soluble; Mainly be that carrier infiltrates porous masonry mortar inside with water; Through with the adverse reaction of cement-hydrate or unhydrated cement granules, or the surface crystallization in being exposed to atmospheric environment causes that masonry mortar forms the variation of structure.Therefore, must adopt an effective measure and improve the anti-Environmental Water erosion performance of mortar flag stone masonry structure thing cement for building mortar, with weather resistance and the operation security of guaranteeing railway and highway subgrade construction.
Contained in Environmental Water and the ground have rodent material mainly to comprise SO to sand-cement slurry
4 2-, HCO
3 -, H
+, Mg
2+, NH
4 +Etc. aggressiveness ion and an alkali metal salt thereof, its erosion mechanism has chemical action and physical action.
The chemical erosion mechanism of action mainly is to contain aggressiveness ionic Environmental Water invasion water cement-based material inside; With the ion in its hole solution or the cement-hydrate generation chemical reaction of hole wall; Form soluble substance or swelling property material or do not have the gelling material; And the cement-based material The Nomenclature Composition and Structure of Complexes is changed, and cause material internal to produce volumetric expansion or surface erosion, cause the works surface cracking, peel off, corrosion and performance degradation.So; The chemical erosion performance of the anti-Environmental Water of sand-cement slurry depends on cement-hydrate more---portlandite and aluminate hydrate, reduce the content of these hydrates, and can significantly improve the anti-Environmental Water erosion performance of sand-cement slurry; Thereby, improve the weather resistance of mortar flag stone works.
The physical erosion mechanism of action mainly is the destruction of salt crystallization to sand-cement slurry, and the dehydration of first salt and the volume change in the hydration process again cause and expand and shrink, and under different temperature and humidity conditions, can be SODIUM SULPHATE ANHYDROUS 99PCT Na like sodium sulfate
2SO
4, seven aqueous sodium persulfate Na
2SO
47H
2O, sal glauberi Na
2SO
410H
2O etc., their molecular volume is different, when transforming each other between these several kinds of salt crystal, volume change can take place.Other inorganic salt also are like this; Its two be salt crystallization produces in the hole solution in sand-cement slurry acts on the crystallization pressure on the hole wall, cause the mortar cracking destruction.For the mortar flag stone structure; Because its back side contacts with underground water with ground; And its front surface is exposed in the atmospheric environment, and underground water infiltrates the masonry mortar between slabstone from its back side, evaporates atmospheric environment from its front surface again; Salt will produce the physical erosion destruction in the crystallization of mortar upper layer.So, stop Environmental Water to be infiltrated or the salt crystallization, just can improve the ability of the anti-salt crystalline fracture of masonry mortar.
Therefore, sand-cement slurry receives the erosion damage effect of Environmental Water, and its internal cause is that the hydrate that is subject to the aggressiveness ion erosion is contained in sand-cement slurry inside and Environmental Water can be infiltrated the inner capillary porosity duct of mortar.
Masonry mortar is generally mixed by silicate cement, Sha Heshui, is material of construction commonly used in a kind of civil engineering work.More existing patents relate to this material of construction, but the construction of the masonry mortar that these patents relate generally to and mechanical property.For example; The CN200710036822.5 patented claim discloses a kind of highly effective water-keeping thickening material and has reached by its masonry mortar that makes; This highly effective water-keeping thickening material is made up of inorganic mineral material and pluronic polymer; Major function is to improve the water-retentivity of masonry mortar, and related pluronic polymer is treated starch, sulfonated lignin, polyvalent alcohol system and mixture, higher polyol, carboxylate salt and multipolymer thereof and T 46155 and verivate thereof etc.These pluronic polymers have certain effect for the water-retentivity of improving masonry mortar, but have little effect for the improvement of the anti-Environmental Water erosion performance of masonry mortar, can not satisfy the life requirement of some side slope protection engineerings.The disclosed a kind of masonry mortar of CN97100700.4 patented claim; Only relate to and in Portland cement, add fibrous material, swelling agent, air and softening agent etc.; To improve the anti-seismic performance of mortar, do not relate to the anti-Environmental Water erosion performance of masonry mortar yet.The disclosed a kind of mortar special additive for building of CN03116914.7 patented claim; Form by naphthalene sulfonic acidformaldehyde condensation product, sugared calcium, methylcellulose gum, X 2073, zeolite powder; Mainly improve the workability such as cohesiveness, denseness, water-retentivity, stability of mortar; Though the admixture that this patent relates to has certain improvement effect through reducing water consumption to the mortar weather resistance, to the anti-Environmental Water erosion performance of mortar to improve effect also very limited.The disclosed sand-cement slurry admixture of CN03118188.0 patented claim mainly is made up of tensio-active agent, cement mortar and thickening material etc.; Like X 2073, sodium lauryl sulphate, wooden calcium sulfonate, calcium nitrite, SODIUM SULPHATE ANHYDROUS 99PCT, CMC 99.5 etc., its function also is to improve the workability of sand-cement slurry.
For improving sand-cement slurry sulfate resistance type Environmental Water erosion performance, the general both at home and abroad sulphate-resistant cement preparation masonry mortar that adopts, the mineral composition of sulphate-resistant cement is different from ordinary Portland cement, C in the sulphate-resistant cement grog
3A and C
3S content is lower, need just can make with specific proportioning raw materials, thereby the price comparison of this cement is expensive, and on market, is not easy to obtain.
Summary of the invention
The purpose of this invention is to provide a kind of anti-erosion agent, it can effectively improve the sulfate resistance crystal property of big wc masonry mortar, satisfies the requirement of the anti-Environmental Water erosive of mortar flag stone mortar.
Another object of the present invention provides a kind of mortar flag stone that contains above-mentioned anti-erosion agent and uses masonry mortar material, and it has good anti-Environmental Water erosion performance, can increase substantially the anti-Environmental Water erosive of side slope protection works weather resistance.
In order to realize the foregoing invention purpose, the technical scheme that the present invention adopts is following:
A kind of anti-erosion agent is made up of components such as flyash, PVA resin, OP auxiliary agent, oxalic acid or borates, and the weight part proportioning of each component is:
100 parts in flyash, 5～20 parts of PVA resins,
0.5～2 part of OP auxiliary agent, 1～10 part of oxalic acid or borate.
The weight part proportioning of above-mentioned each component can be preferably:
100 parts in flyash, 10～15 parts of PVA resins,
1～2 part of OP auxiliary agent, 5～10 parts of oxalic acid or borates.
In above-mentioned each component:
Flyash is the dry powder coal ash that thermal power plant discharges, and can be the low calcium fly ash of I level or II level, and is best with the low calcium fly ash of I level.Flyash both can dilute in the silicate series cement Environmental Water had been corroded more sensitive C
3The content of A mineral, the portlandite Ca (OH) that can form with hydrated cementitious again
2Pozzolanic reaction taking place, reduce Environmental Water is corroded more sensitive portlandite content, is increased in Environmental Water and corrodes the content of hydrated calcium silicate C-S-H more stable, that calcium silicon is more less than C/S down, thereby, significantly improve the anti-Environmental Water erosion performance of masonry mortar.
The PVA resin is meant polyvinyl alcohol resin, on its macromolecular chain, contains many hydroxyl OH
-, this macromolecular compound has multiple function.One of which, they have absorption sulfate ion SO
4 2-Function, as shown in Figure 1.When the Environmental Water of sulphate-containing ion was infiltrated masonry mortar inside, they adsorbed sulfate ion, can suppress chemistry and the physical erosion effect of sulfate ion to masonry mortar effectively; Its two, they can improve the adhesive property on masonry mortar and slabstone surface, increase the cohesive strength between masonry mortar and slabstone; Its three, they can improve the workability such as water-retentivity, flowability of masonry mortar.Thereby, improved the physical mechanics and the anti-Environmental Water erosion performance of masonry mortar.
The OP auxiliary agent is one type of alkylphenol and ethylene oxide condensate tensio-active agent (polyoxyethylene octylphenol ether); Commonly used for printing and dyeing and textile industry, they can reduce the surface tension of water, thereby; They and PVA resin-bonded; Can in the masonry mortar mixture, introduce the sealed porosity of micro-aperture, this not only can improve the workability of masonry mortar, and can significantly improve the impermeability and the frost resistance of masonry mortar; Preferred OP-10 (octyl phenol polyoxy ethene (10) ether).
Oxalic acid or borate are the adjustable solidification agents of some silicate cements; Oxalic acid has blood coagulation enhancing effect, and borate such as Sodium Tetraborate, potassium borate etc. have delayed coagulation; Therefore, they can regulate the setting and harden time of masonry mortar, and simultaneously, they also can form complex compound with portlandite, PVA resin etc., improve the anti-Environmental Water erosion performance of masonry mortar effectively.
Above-mentioned anti-erosion agent can prepare through following method: earlier the PVA resin carried out mechanical powder and becomes fine powder, and then that flyash, PVA resin, OP auxiliary agent and oxalic acid or borate etc. are even in stirrer for mixing, promptly make anti-erosion agent of the present invention.
Above-mentioned anti-erosion agent can be used for preparing various masonry mortars or other sand-cement slurry.
Contain the masonry mortar of above-mentioned anti-erosion agent, form by following components in weight portions:
60～90 parts of silicate series cements, 10～40 parts of anti-erosion agents, 200～400 parts in sand, the consumption of water is with the value that requires of the workability that satisfies masonry mortar and intensity, and optimum value is 40～60 parts.
The weight part proportioning of above-mentioned each component can be preferably:
70～88 parts of silicate series cements, 12～30 parts of anti-erosion agents, 200～300 parts in sand,
The consumption of water is 40～60 parts.
Silicate series cement in the said components can be selected from PI silicate cement, PII silicate cement, ordinary Portland cement, Portland blast; Can preferably adopt the not ordinary Portland cement of limy stone flour.
Above-mentioned masonry mortar can prepare through following method: adopt the ordinary mortar stirrer as mortar mixing plant, earlier sand, water and anti-erosion agent are joined in the stirrer, stirred 5～10 minutes, add cement then and continue to stir, until the uniform mortar of formation.
Compared with prior art, the invention has the beneficial effects as follows:
Anti-erosion agent of the present invention can effectively be resisted Environmental Water and (comprise and contain SO
4 2-, HCO
3 -, H
+, Mg
+ 2, NH
4 +Etc. aggressiveness ion and an alkali metal salt thereof, and pH is lower than 5 acidic rain water) corrode, can effectively improve the sulfate resistance crystal property of big wc masonry mortar, satisfy the requirement of the anti-Environmental Water erosive of mortar flag stone mortar.Thereby the mortar flag stone that contains above-mentioned anti-erosion agent is used masonry mortar material, has good anti-Environmental Water erosion performance, can increase substantially the anti-Environmental Water erosive of side slope protection works weather resistance.
Description of drawings
Fig. 1 is PVA resin (a) and its absorption SO
4 2-The infrared spectrogram of back (b);
Fig. 2 is that the masonry mortar of embodiment 1～4 is immersed in rate of expansion in the sulfate liquor with the soak time change curve;
Fig. 3 is that the masonry mortar of embodiment 5～7 partly soaks coefficient against corrosion in the sulfate liquor with the soak time change curve.
Among Fig. 3, S0 is the mortar specimen of embodiment 5, and S1.2 is the mortar specimen of embodiment 6, and S2 is the mortar specimen of embodiment 7.
Embodiment
Below in conjunction with embodiment the present invention is made further detailed description.
But should this be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment.
The composition of anti-erosion agent and proportioning are: 100 parts of low calcium fly ash of II level, and 5 parts of PVA resins, 1 part of OP-10,5 parts of oxalic acid stir into mixture with these materials.
Adopt clinker mineral to consist of 57.7%C
3S, 19.6%C
2S, 10.6%C
3A and 5.8%C
4The anti-erosion agent and the sand of the ordinary Portland cement of AF (OPC), above-mentioned composition are mixed the system masonry mortar.The masonry mortar proportioning of embodiment 1～4 is seen table 1, and wherein, embodiment 1 is a Comparative Examples.
The masonry mortar proportioning of table 1 embodiment 1～4
| Cement | Anti-erosion agent | Water | Sand | |
| |
100 | 0 | 50 | 275 |
| |
90 | 10 | 50 | 275 |
| |
80 | 20 | 50 | 275 |
| |
70 | 30 | 50 | 275 |
Earlier sand and anti-erosion agent are added and stir 5～10 minutes in the entry, again ordinary Portland cement is added successively, under 120 rev/mins high speed, stir again, obtain new sand cutting and starch.With new sand cutting slurry difference moulding 25 * 25 * 285mm
3Prism and 50 * 50 * 50mm
3Cube specimen, the demoulding after 24 hours when cube specimen ultimate compression strength reaches 20.0MPa, is immersed in 23 ℃ 5%Na
2SO
4In the solution, measure the line length rate of expansion of prism test specimen when soaking for 1,2,3,4,8,12,16,24,36,52,65,78,91 and 104 weeks, its result is as shown in Figure 2.
Can see that from Fig. 2 the line length rate of expansion of the prism mortar specimen of embodiment 1 (not conforming to anti-erosion agent) is with 5%Na
2SO
4Soak time in the solution prolongs and sharply increases, and when being dipped into for 35 weeks, its linear expansivity reaches 0.6%, mortar specimen this moment cracking destruction already.And the line length rate of expansion of prism mortar specimen that contains anti-erosion agent (embodiment 2～4) is with 5%Na
2SO
4The variation of the soak time in the solution is relevant with the content of anti-erosion agent; When anti-erosion agent content is 20 (embodiment 3); When being dipped into for 110 weeks, the line length rate of expansion of prism mortar specimen has only 0.05%, shows the erosion performance of fabulous anti-sulfur acid salt environment water.
Be immersed in 5%Na
2SO
4In the solution, the time and intensity rate of loss when cracking appears in the cubes mortar specimen is as shown in table 2.Can see; When being dipped into 8 months, the mortar specimen of embodiment 1 ftractures, and its resistance to compression and folding strength retention rate have only 73.7% and 30.3% respectively; The mortar specimen of embodiment 3 is after soaking more than 2 years; Its resistance to compression and folding strength conservation rate are respectively 84.7% and 153% all greater than 80%, present the erosion performance of good anti-sulfur acid salt environment water.
Table 2 is immersed in masonry mortar test specimen cracking time and strength retention ratio in the sulfate liquor
Table 3 is immersed in the mass loss rate of masonry mortar in the sulphuric acid soln
In the sulphuric acid soln of 0.1N (equivalent concentration unit) and 1N, soaked 4 days, the test result of cubes mortar specimen mass loss rate is as shown in table 3.Can see that the mortar specimen mass loss rate of embodiment 1 is respectively 1.15% and 6.24%.And the mortar specimen mass loss rate of embodiment 2～4 reduces with the increase of anti-erosion agent content in the mortar; When anti-erosion agent content is 20; The mortar specimen of embodiment 3 is immersed in the sulphuric acid soln of 0.1N and 1N; Its mass loss rate has only 0.42% and 5.18%, compares with the test specimen of embodiment 1, has reduced by 63.5% and 17% respectively.So anti-erosion agent has significantly improved the erosion performance of the resistance to acid Environmental Water of masonry mortar.
Mortar specimen is carried out carbonization test in standard carbonization test case, with carbon containing sour water and CO in the simulation masonry mortar Chinese People's Anti-Japanese Military and Political College gas
2The performance of gas after mortar specimen exposes different time, is rived it, measures the carbonation depth of test specimen, and the result is as shown in table 4.The result shows, compares with embodiment 1, and the masonry mortar that contains the embodiment 2～4 of anti-erosion agent has anti-preferably carbon containing sour water and CO
2The erosion performance of gas.
Table 4 contains the resistant to carbon dioxide erosion performance of the masonry mortar of anti-erosion agent
Above-mentioned test-results shows; Anti-erosion agent can effectively improve the anti-Environmental Water erosion performance of masonry mortar; Masonry mortar with the anti-erosion agent preparation can significantly improve the weather resistance of mortar flag stone structure in containing aggressiveness ionic Environmental Water in the subgrade protection project.
The composition of anti-erosion agent and proportioning are: 100 parts of low calcium fly ash of II level, and 10 parts of PVA resins, 2 parts of OP-10,10 parts of Sodium Tetraboratees stir into mixture with these materials.
Adopt clinker mineral to consist of 57.7%C
3S, 19.6%C
2S, 10.6%C
3A and 5.8%C
4The anti-erosion agent and the sand of the ordinary Portland cement of AF (OPC), above-mentioned composition are mixed the system masonry mortar.The masonry mortar proportioning of embodiment 5～7 is seen table 5, and wherein, embodiment 5 is Comparative Examples.
Earlier sand and anti-erosion agent are added and stir 5～10 minutes in the entry, again ordinary Portland cement is added successively, under 120 rev/mins high speed, stir again, obtain new sand cutting and starch.With new sand cutting slurry difference moulding φ 25 * 150mm
3The right cylinder test specimen, the demoulding after 24 hours was placed under the standard conditions maintenance 28 days.Adopt the salt Crystal Physics erosion action in the half soak test simulation use, half that is about to test specimen is immersed in 23 ℃ 5%Na
2SO
4In the solution, half is exposed in 23 ℃ of room airs, measures the folding strength of right cylinder test specimen when immersion 1,2,3,4 and June, with the initial folding strength of test specimen and at 5%Na
2SO
4Partly soak the ratio of test specimen folding strength behind the different time in the solution, calculate coefficient against corrosion, its result is as shown in Figure 3.
The masonry mortar proportioning of table 5 embodiment 5～7
| Cement | Anti-erosion agent | | Sand | |
| Embodiment | ||||
| 5 | 100 | 0 | 80 | 275 |
| |
88 | 12 | 80 | 275 |
| Embodiment 7 | 70 | 30 | 80 | 275 |
Can see by Fig. 3, at 5%Na
2SO
4After partly soaking 6 months in the solution; The coefficient against corrosion of the mortar specimen of the embodiment 5 of Comparative Examples has only 0.62; Do not reach request for utilization; And contain the embodiment 6 of anti-erosion agent and the mortar specimen coefficient against corrosion of embodiment 7 reaches 0.9, and show that anti-erosion agent can effectively improve the sulfate resistance crystal property of big wc masonry mortar, satisfy the requirement of the anti-Environmental Water erosive of mortar flag stone mortar.
Embodiment 8～11
The composition of anti-erosion agent and proportioning are: 100 parts of low calcium fly ash of I level, and 20 parts of PVA resins, 2 parts of OP-10,10 parts of Sodium Tetraboratees stir into mixture with these materials.
The masonry mortar proportioning of embodiment 8～11: adopt among the embodiment 8 and 9 of PI type silicate cement, the sand consumption is 400 parts; Adopt in Portland fly (PF) embodiment 10 and 11, the sand consumption is 300 parts.The mixing water amount confirms that with the workability of masonry mortar so that the building construction operation, cement and anti-erosion agent consumption are seen table 6.
Earlier sand and anti-erosion agent are added and stir 5～10 minutes in the entry, again PI type silicate cement or PF silicate cement are added, under 120 rev/mins high speed, stir again, obtain new sand cutting and starch.With new sand cutting slurry difference moulding φ 25 * 150mm
3Right cylinder, the demoulding after 24 hours, maintenance be after 28 days, the right cylinder test specimen is immersed in 23 ℃ 5%Na
2SO
4In the solution, measure test specimen at the folding strength that soaks at 1,3,6 o'clock, ratio---the coefficient against corrosion of test specimen folding strength and initial folding strength behind the calculating immersion certain hour, its result is as shown in table 6.
Table 6 contains the sulphate-corrosion resistance ability of the masonry mortar of anti-erosion agent
By the foregoing description; Can see that anti-erosion agent can significantly improve the sulphate-corrosion resistance ability of sand-cement slurry, when utilizing neat portland cement; The desirable higher value of the parameter of anti-erosion agent; When adopting Portland fly, the desirable smaller value of the parameter of anti-erosion agent just can satisfy the anti-erosion coefficient greater than 0.8 engine request.
Anti-erosion agent content (%) described in above-mentioned each embodiment all is that total amount with cement and anti-erosion agent is 100% to calculate.
Claims (10)
1. anti-erosion agent, it is characterized in that: it is made up of following components in weight portions:
100 parts in flyash, 5～20 parts of PVA resins,
0.5～2 part of OP auxiliary agent, 1～10 part of oxalic acid or borate.
2. anti-erosion agent according to claim 1 is characterized in that: the weight part proportioning of described each component is:
100 parts in flyash, 10～15 parts of PVA resins,
1～2 part of OP auxiliary agent, 5～10 parts of oxalic acid or borates.
3. anti-erosion agent according to claim 1 and 2 is characterized in that: described flyash is low calcium fly ash of I level or the low calcium fly ash of II level.
4. anti-erosion agent according to claim 3 is characterized in that: described flyash is the low calcium fly ash of I level.
5. anti-erosion agent according to claim 1 and 2 is characterized in that: described OP auxiliary agent is OP-10.
6. anti-erosion agent according to claim 1 and 2 is characterized in that: described borate is selected from Sodium Tetraborate, potassium borate.
7. contain the masonry mortar material of claim 1 or 2 described anti-erosion agents, form by following components in weight portions:
60～90 parts of silicate series cements, 10～40 parts of anti-erosion agents, 200～400 parts in sand;
The consumption of water is with the value that requires of the workability that satisfies masonry mortar and intensity.
8. masonry mortar material according to claim 7 is characterized in that: the weight part proportioning of described each component is:
70～88 parts of silicate series cements, 12～30 parts of anti-erosion agents, 200～300 parts in sand,
The consumption of water is 40～60 parts.
9. masonry mortar material according to claim 7 is characterized in that: described silicate series cement is selected from PI silicate cement, PII silicate cement, ordinary Portland cement, Portland blast.
10. masonry mortar material according to claim 7 is characterized in that: described silicate series cement adopts the not ordinary Portland cement of limy stone flour.
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| CN105948553A (en) * | 2016-05-17 | 2016-09-21 | 武汉理工大学 | Sulfate-resistant anti-corrosion agent for cement-based material |
| CN107894384B (en) * | 2017-11-10 | 2021-04-27 | 石家庄铁道大学 | Water-rich region fractured rock mass tunnel lining water pressure distribution test simulation system |
| CN107941671B (en) * | 2017-11-10 | 2020-08-11 | 石家庄铁道大学 | Water-rich region fractured rock mass tunnel lining water pressure distribution test simulation method |
| CN108793808B (en) * | 2018-07-16 | 2020-11-03 | 河海大学 | Concrete magnesium sulfate corrosion-resistant preservative based on plant extract and preparation method thereof |
| CN114644494B (en) * | 2022-04-22 | 2023-03-21 | 北京悦筑新天节能科技有限公司 | Flexible light leveling mortar and preparation method and application thereof |
| CN117567091B (en) * | 2023-11-22 | 2024-06-14 | 中国矿业大学 | Mine water corrosion-resistant coal-based solid waste filling paste and preparation method thereof |
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| CN1526676A (en) * | 2003-09-23 | 2004-09-08 | 昆明理工大学 | CBC composite material made of industrial slag and its production process |
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| CN1526676A (en) * | 2003-09-23 | 2004-09-08 | 昆明理工大学 | CBC composite material made of industrial slag and its production process |
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| Title |
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| 黄海.提高锚固体抗环境水侵蚀的注浆用水泥基砂浆的研究.《中国优秀硕士学位论文全文数据库 工程科II辑》.2007,(第05期),第9-10页. * |
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