CN103193425A - High-strength pumping anti-crack concrete prepared by slag aggregate and production method of concrete - Google Patents
High-strength pumping anti-crack concrete prepared by slag aggregate and production method of concrete Download PDFInfo
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- CN103193425A CN103193425A CN2013101215881A CN201310121588A CN103193425A CN 103193425 A CN103193425 A CN 103193425A CN 2013101215881 A CN2013101215881 A CN 2013101215881A CN 201310121588 A CN201310121588 A CN 201310121588A CN 103193425 A CN103193425 A CN 103193425A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a high-strength pumping anti-crack concrete prepared by a slag aggregate and a production method of the high-strength pumping anti-crack concrete. By adopting the high-strength pumping anti-crack concrete prepared by the slag aggregate and disclosed by the invention, the mineral waste residue can be effectively recycled; various requirements of engineering application can be satisfied and the high-strength pumping anti-crack concrete is good for improving the durability of the concrete. The high-strength pumping anti-crack concrete prepared by the slag aggregate and disclosed by the invention is prepared from the following raw materials in parts by weight: 140-175 parts by weight of water, 490-550 parts by weight of gel material, 1000-1200 parts by weight of coarse aggregate, 600-800 parts by weight of fine aggregate, 10-20 parts by weight of an inner maintaining agent and a water reducing agent, wherein the mass mixing amount is 1.0-2.0% of the total mass of the gel material; the gel material consists of 430-460 parts by weight of cement and 60-90 parts by weight of mineral admixtures; the coarse aggregate is macadam; the fine aggregate is high-titanium heavy-slag sand; and the inner maintaining agent is starch grafted anion-non-ionic group inner maintaining material. The production method of the high-strength pumping anti-crack concrete prepared by the slag aggregate and disclosed by the invention comprises the following steps of: a, mixing high-titanium heavy-slag sand and macadam with gel material, and uniformly stirring; b, adding partial water and uniformly stirring; and c, adding remaining water and raw materials and uniformly stirring to acquire the high-strength pumping anti-crack concrete. The concrete disclosed by the invention is excellent in physical properties and good in durability property, and can well satisfy the engineering requirements.
Description
Technical field
The present invention relates to concrete and preparation method thereof, belong to concrete field.
Background technology
It is a kind of that the cooling of the melted gangue that produces when high-titanium dry slag is smelting vanadium-titanium magnetite by blast furnace forms is main stone material by mineral such as titanaugite, uhligites, has porous, high-strength, characteristics such as chemical stability is good.At present, both at home and abroad high titanium blast furnace slag utilize technique means, only can satisfy the demand of general civil building engineering, do not have and utilize it to prepare the bibliographical information of the method for bridge high performance concrete.Adopt high-titanium dry slag sand to gather materials as thickness, the preparation high performance concrete is applied to bridge, motorway and also has following point: at first, the high-titanium dry slag sand grating is relatively poor, and dust content is higher, and surface irregularity is unfavorable for for the preparation high-strength concrete.Secondly, high-titanium dry slag sand is a kind of porous material, more common river sand apparent density is big, and surfaceness is bigger, in the concrete pumping process owing to be subjected to the usefulness of doing of pumping pressure, high-titanium dry slag sand very easily adsorbs admixture and absorption portion moisture, thereby influences concrete work energy, is unfavorable for the pump concrete pumping construction.When if the initial slump of concrete is excessive, under the pumping pressure effect, can disengage part moisture in the high-titanium dry slag sand hole, cause concrete to be prone to and take off end phenomenon, be unfavorable for the pump concrete pumping construction equally.Therefore, high-titanium dry slag sand is applied to also have certain problem in the application of High Strength Pump Concrete at present.Climb steel and be faced with the high-titanium dry slag situation that pile up like a mountain, be badly in need of a kind of method of efficiently utilizing the titanium slag sand; Simultaneously, the annual need of the construction of Panzhihua City consumes a large amount of sand, owing to be located in Upper Yangtze River, and the sandstone scarcity of gathering materials, the natural sand cost is quite high, and the excessive fried stone that cuts into a mountain will cause destroying vegetation.Therefore, utilize high-titanium dry slag sand preparation High Strength Pump Concrete, be conducive to continuous development of society economy, to saving natural resources, reduce engineering cost, aspect such as preserve the ecological environment all has great importance.
Summary of the invention
The technical problem to be solved in the present invention provides high-strength pumping anti-crack concrete and the production method thereof that a kind of slag gathers materials and prepares, and utilizes the mineral waste residue effectively to dissolve, and not only can satisfy every requirement that engineering is used, and be conducive to promote concrete weather resistance.
The high-strength pumping anti-crack concrete that slag of the present invention gathers materials and prepares, formed by the raw material of following weight part:
Water 140～175 weight parts,
Gelatinous material 490～550 weight parts,
Coarse aggregate 1000～1200 weight parts,
Fine aggregate 600～800 weight parts,
Interior curing agent 10～20 weight parts,
The quality volume of water reducer is 1.0～2.0% of gelling material quality;
Wherein, as preferred version, gelatinous material is made up of the cement of 430～460 weight parts and the mineral admixture of 60～90 weight parts; Coarse aggregate is rubble; Fine aggregate is high-titanium dry slag sand; Interior curing agent is conserving material in starch-grafted negatively charged ion-non-ionic group.
Further, in order to improve the concrete water-reducing effect, described water reducer is preferably polycarboxylic acid series high efficiency water reducing agent.As preferred version, polycarboxylic acid series high efficiency water reducing agent by organic silicone oil defoamer 5～10wt%, colophonium pyrolytic polymer air entrapment agent 1～2wt%, ether of cellulose tackifier 2.5～5wt%, reduce component 7.5～15wt%, be composited with the polycarboxylic acid series mother liquor; Reducing component is made up of according to mass ratio 1:1～1:2 lower alcohol epoxy compounds and the alkyl polyoxyethylene ether of C1～C3.
Above-mentioned high-efficiency water-reducing agent of poly-carboxylic acid aims at the present invention's development.Because the needs of high-strength and pumping technology under strictness control water consumption prerequisite, in order to satisfy suitable slurry content and suitable flowability properties, simultaneously, have the performance that early strength is good, contraction is low, later strength is good.Invent a kind of high-titanium dry slag sand High Strength Pump Concrete admixture that aims at by different components in the adjustment admixture.Because the specific surface area of high-titanium dry slag sand is bigger, friction resistance is big on the one hand, and is more serious to admixture absorption on the other hand, causes the concrete initialization to be not in good state, and divergence is on the low side, can't satisfy the requirement of concrete construction.For this reason, the present invention is by a certain amount of bleed component that contains anion surfactant of admixture, make concrete produce a large amount of identical charges and the equally distributed microbubble of energy in the process of mixing and stirring, these microbubbles play " ball " effect, effectively improve concrete initial extension degree.The affiliation that adds of concrete admixture is introduced air pocket at inside concrete, not only bad for the concrete original state of improvement, and also harmful to concrete physical and mechanical property and long durability.A kind of interfacial state that can change system destroys or the material of inhibition foam can be eliminated air pocket by introducing.This defoamer has higher surface activity, can form new surface film or change the original surface film, reduces the intensity of foam, and then effectively reduces the growing amount of air pocket in the concrete.For avoiding concrete generation because of segregation plugging phenomenon in the pumping process, admixture is a certain amount of in admixture has a glutinous component of increasing of water conservation and thickening power, make its polymer long-chain can be at cement granules, form stable spatial flexible network structure between cement and the aggregate, improve the cohesion of fresh concrete, and the chemical group that it contains such as hydroxyl associate into hydrogen bond with Sauerstoffatom on the ehter bond with water molecules, free-water is become in conjunction with water, has enough water during with the assurance hydrated cementitious, so the cement slurry viscosity is risen, effectively avoids in the pumping process generation because of segregation plugging phenomenon.For reducing concrete shrinkage, in admixture, increase a kind of significantly reduced component of reducing of concrete pore solution surface tension that makes, fundamentally reduce concrete and produced self-constriction, the hole refinement, there is not tangible primary crackle to produce, concrete structure is finer and close, improves concrete resistance to cleavage, reduces to shrink.Defoamer selects for use organic silicone oil 5～10%, air entrapment agent to select for use colophonium pyrolytic polymer 1～2%, tackifier to select ether of cellulose 2.5～5% for use, reduce epoxy compounds that component selects lower alcohol for use mixes with alkyl polyoxyethylene ether and gets.Account for content and the compound a kind of concrete admixture of high-titanium dry slag sand that is applicable to that obtains of water reducer that adds dosage by adjusting above each composition.
Wherein, described cement is preferably the P.O.52.5 ordinary Portland cement.
Further, described rubble is preferably 5～25mm continuous grading, and tap density is preferably 1500～1700kg/m
3, water-intake rate is preferably 0.1～1.5%, and the crush values index is preferably 6～16%;
Further, described high-titanium dry slag sand fineness modulus is preferably 2.5～3.2, and apparent density is 2600～3300kg/m
3Further, the structural formula of the interior conserving material of starch-grafted negatively charged ion-non-ionic group is shown in formula I
Wherein, the preparation method of conserving material is as follows in the starch-grafted negatively charged ion-non-ionic group shown in the formula I:
A, starch pasting: the kaolin of the tapioca (flour) of 0.15 weight part and 0.04 weight part is dissolved in the distilled water of 3 weight parts, and temperature is 70～80 ℃, stirs evenly, and gelatinization 30min obtains solution 1;
B, free radical cause: take by weighing the ceric ammonium nitrate of 0.0012 weight part and the ammonium persulphate of 0.0108 weight part, be dissolved in the distilled water of 2 weight parts, temperature is 60～70 ℃, stirs evenly, and adds a step and obtains in the solution 1, and reaction 10min obtains solution 2;
C, graft copolymerization: take by weighing the monomer acrylamide of 0.416 weight part, monomer 2-acrylamido-2 methyl propane sulfonic acid and 0.0045 parts by weight of cross-linking agent of 0.132 weight part, be dissolved in the distilled water of 3 weight parts, temperature is 60～70 ℃, stir evenly, join in the solution 2, reaction obtains solution 3, and solution 3 is for colourless spawn or contain the gel strong solution; Wherein, the control of the dropping time of monomer acrylamide and monomer 2-acrylamido-2 methyl propane sulfonic acid is in 2～4h;
D, hydrolysis: 0.13～0.14 weight part NaOH is dissolved in the distilled water of 4 weight parts, joins in the solution 3, hydrolysis 30min obtains crude product;
E, dehydration, washing: with the crude product dehydration, with ethanol or acetone head product is soaked 6～12h then, washing obtains pure products;
F, drying, pulverizing: with the pure products drying that the e step obtains, pulverize, namely.
By a kind of High hydrophilous resin material that contains a large amount of strong hydrophilicity groups and be three-dimensional netted crosslinking structure of admixture as interior maintenance component, utilize the chemical bond between polymer molecule and the water molecules to absorb and preservation moisture, form the maintenance environment that continues water supply at inside concrete, important effect is played in the development of concrete strength.Interior curing agent is the interior conserving material of the starch-grafted negatively charged ion-non-ionic group of independent research, shown in formula I, has and absorb water-releases water function preferably, and concrete is played interior maintenance action.High water-retaining capacity in being somebody's turn to do under the curing agent alkaline environment is because anionic property monomer and non-ionic monomer have high-hydrophilic-SO
3H and-NH
2Determined.-SO
3The divalence of H, Tricationic have fine tolerance, and-NH
2Have good stability to hydrolysis, antiacid alkali and thermostability ,-SO
3H/-NH
2The electric density on the main chain has been regulated and control in the introducing of middle nonionic group preferably, has reduced the susceptibility of macromolecule network at basic solution, thereby has improved interior conserving material to the receptivity of basic solution.The polymer long-chain is drawn close tangle up mutually and is cross-linked to each other and is reticulated structure before the suction, macromolecule network is the unionized one-tenth ion pair of solid network bundle, water and the effect of hydrophilic radical and water molecules when meeting water, it is poor to make the expansion of high score subnet bundle produce the inside and outside ionic concn of net, in web frame, permeate under the osmotic pressure effect thereby produce the osmotic pressure water molecules, thus suction.After the nonionic degree improved, electrostatic repulsion significantly reduced, the network easier contraction that becomes, and full hydrogel is subjected to the effect of heat and pressure simultaneously, and it releases the water acceleration, release the water yield also strengthens.Thereby guaranteed its suction-release water characteristic, play preferably to concrete in maintenance action.
The gather materials production method of high-strength pumping anti-crack concrete of preparation of slag of the present invention comprises the steps:
A, high-titanium dry slag sand, rubble are mixed with gelling material, and stir evenly; And before feeding intake, the water ratio of high-titanium dry slag sand is 7～10%;
B, adding part water stir evenly;
C, remaining water and raw material are added, stir evenly, namely.
Wherein, a step mixes high-titanium dry slag sand and gelling material fully and its surface pore is blocked, and gelling material filling part hole is to reduce slag sand to the absorption of admixture.Before feeding intake, the water ratio of high-titanium dry slag sand is 7%～10%.As preferred version, high-titanium dry slag sand is before feeding intake, and the water treatment of satisfying earlier shifts to an earlier date 24 hours at least and places water reservoir to its water treatment of satisfying high-titanium dry slag sand, makes high-titanium dry slag sand fully wetting.4～5 hours put the water in the water reservoir only before mixing concrete processed, allow the free dehydration of high-titanium dry slag sand.High-titanium dry slag sand in the sand heap is mixed with forklift mixing preceding 1 hour of concrete processed, get in the sand heap three representative positions at least survey sand and pile the water ratio of medium sands and average to guarantee its water ratio half an hour before mixing concrete processed.The b step adds part water and stirs, and slurry is contacted with high-titanium dry slag sand fully, reduces because the high-titanium dry slag sand specific surface area is bigger, reduces the absorption to admixture, plays the water shutoff effect simultaneously; The c step adds the stirrer mix with remaining water and raw material at last, reach the effect that free water fully is combined with gelling material in the concrete, avoid because the churning time deficiency causes the not generation of good situation of concrete original state, improve the homogeneity of concrete mix simultaneously, all helpful to concrete physical and mechanical property and long durability, as preferred version, total time spent of mix is manyed 10s～30s than common river sand concrete.
Slag of the present invention gather materials the preparation high-strength pumping anti-crack concrete can reach following performance: strength grade C65, the slump 18～22cm, chloride-penetration resistance coefficient C65＜1.0 * 10
-12, 360d coefficient＜2.0 of creeping; Freeze proof grade C65＞F300; Resisting erosion of sulfate coefficient C65＞0.9, physicals is good, and endurance quality is good, has performances such as high-strength pumping and cracking resistance, can well engineering demands.
The present invention is applied to high-titanium dry slag sand in the concrete as fine aggregate, satisfies every requirement that engineering is used, and is conducive to concrete weather resistance lifting, has broad application prospects in engineerings such as road, bridge and tunnel.And be conducive to continuous development of society economy, to saving natural resources, reduce engineering cost, protection environment etc. all has great importance.
Embodiment
Embodiment 1
Choose raw material according to the proportioning raw materials in the table 1, with high-titanium dry slag sand, rubble and gelling material dry mixing, allow high-titanium dry slag sand and gelling material mix fully, adding part water again stirs, slurry is contacted with high-titanium dry slag sand fully, at last rest parts water and whole admixture are added the stirrer mix, namely.Its serviceability and mechanical performance data are listed in table 5 and table 6.
The gather materials proportioning raw materials of high-strength pumping anti-crack concrete of preparation of table 1 slag
Wherein, flyash density 0.8g/cm
3～1.1g/cm
3Water reducer is polycarboxylic acid series high efficiency water reducing agent.Cement is ordinary Portland cement P.O.52.5; Fine aggregate is high-titanium dry slag sand, and apparent density is 2600～3300kg/m
3Coarse aggregate is common lime rock rubble, 5～25mm continuous grading, tap density 1500～1700kg/m
3
Embodiment 2
Choose raw material according to the proportioning raw materials in the table 2, with high-titanium dry slag sand, rubble and gelling material dry mixing, allow high-titanium dry slag sand and gelling material mix fully, adding part water again stirs, slurry is contacted with high-titanium dry slag sand fully, at last rest parts water and whole admixture are added the stirrer mix, namely.Its serviceability and mechanical performance data are listed in table 5 and table 6.
The gather materials proportioning raw materials of high-strength pumping anti-crack concrete of preparation of table 2 slag
Wherein, cement is ordinary Portland cement P.O.52.5; Fine aggregate is high-titanium dry slag sand, and apparent density is 2600～3300kg/m
3Coarse aggregate is common lime rock rubble, 5～25mm continuous grading, tap density 1500～1700kg/m
3
Embodiment 3
Choose raw material according to the proportioning raw materials in the table 3, with high-titanium dry slag sand, rubble and gelling material dry mixing, allow high-titanium dry slag sand and gelling material mix fully, adding part water again stirs, slurry is contacted with high-titanium dry slag sand fully, at last rest parts water and whole admixture are added the stirrer mix, namely.Its serviceability and mechanical performance data are listed in table 5 and table 6.
The gather materials proportioning raw materials of high-strength pumping anti-crack concrete of preparation of table 3 slag
Wherein, cement is ordinary Portland cement P.O.52.5; Fine aggregate is high-titanium dry slag sand, and apparent density is 2600～3300kg/m
3Described coarse aggregate is common lime rock rubble, 5～25mm continuous grading, tap density 1500～1700kg/m
3
Embodiment 4
Choose raw material according to the proportioning raw materials in the table 4, with high-titanium dry slag sand, rubble and gelling material dry mixing, allow high-titanium dry slag sand and gelling material mix fully, adding part water again stirs, slurry is contacted with high-titanium dry slag sand fully, at last rest parts water and whole admixture are added the stirrer mix, namely.Its serviceability and mechanical performance data are listed in table 5 and table 6.
The gather materials proportioning raw materials of high-strength pumping anti-crack concrete of preparation of table 4 slag
Wherein, cement is ordinary Portland cement P.O.52.5; Fine aggregate is high-titanium dry slag sand, and apparent density is 2600～3300kg/m
3Coarse aggregate is common lime rock rubble, 5～25mm continuous grading, tap density 1500～1700kg/m
3
The concrete technical indicator that table 5 embodiment 1～4 makes
| Embodiment | The slump (mm) | Divergence (mm) | 7d/28d ultimate compression strength/Mpa | 7d/28d folding strength/Mpa |
| 1 | 220 | 530 | 61.3/73.5 | 5.4/6.6 |
| 2 | 210 | 500 | 63.6/74.2 | 5.5/6.8 |
| 3 | 200 | 520 | 64.8/77.5 | 5.7/6.9 |
| 4 | 210 | 520 | 62.5/75.1 | 5.6/6.7 |
Gather materials every physicals of high-strength pumping anti-crack concrete of preparation of the explanation of last table, slag of the present invention is good, and the homogeneity height has excellent serviceability.
Table 6 embodiment 1～4 makes the durability of concrete technical indicator
The gather materials high-strength pumping anti-crack concrete of preparation of the explanation of last table, slag of the present invention has the favorable durability energy.
Each concrete raw material that the present invention is cited, and the bound of each raw material, interval value can both realize the present invention, do not enumerate embodiment one by one at this.
Claims (9)
- Slag gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that, formed by the raw material of following weight part:Water 140～175 weight parts,Gelatinous material 490～550 weight parts,Coarse aggregate 1000～1200 weight parts,Fine aggregate 600～800 weight parts,Interior curing agent 10～20 weight parts,The quality volume of water reducer is 1.0～2.0% of gelling material quality;Wherein, described gelatinous material is made up of the cement of 430～460 weight parts and the mineral admixture of 60～90 weight parts; Described coarse aggregate is rubble; Described fine aggregate is high-titanium dry slag sand; Interior curing agent is conserving material in starch-grafted negatively charged ion-non-ionic group.
- According to the described slag of claim 1 gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that: described water reducer is polycarboxylic acid series high efficiency water reducing agent.
- According to the described slag of claim 2 gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that: described polycarboxylic acid series high efficiency water reducing agent is composed of the following components: organic silicone oil defoamer 5～10wt%, colophonium pyrolytic polymer air entrapment agent 1～2wt%, ether of cellulose tackifier 2.5～5wt%, reduce component 7.5～15wt%, be composited with the polycarboxylic acid series mother liquor; The described component of reducing is made up of according to mass ratio 1:1～1:2 lower alcohol epoxy compounds and the alkyl polyoxyethylene ether of C1～C3.
- According to each described slag of claim 1～3 gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that: described cement is the P.O.52.5 ordinary Portland cement.
- According to each described slag of claim 1～4 gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that: described rubble is 5～25mm continuous grading, tap density is 1500～1700kg/m 3, water-intake rate is 0.1～1.5%, the crush values index is 6～16%.
- According to each described slag of claim 1～5 gather materials the preparation high-strength pumping anti-crack concrete, it is characterized in that: described high-titanium dry slag sand fineness modulus is 2.5～3.2, apparent density is 2600～3300kg/m 3
- 7. the high-strength pumping anti-crack concrete that gathers materials and prepare according to each described slag of claim 1～6 is characterized in that, the conserving material structure is shown in formula I in described starch-grafted negatively charged ion-non-ionic group:
- 8. the high-strength pumping anti-crack concrete that gathers materials and prepare according to the described slag of claim 7 is characterized in that, the conserving material preparation method is as follows in described starch-grafted negatively charged ion-non-ionic group:A, starch pasting: the kaolin of the tapioca (flour) of 0.15 weight part and 0.04 weight part is dissolved in the distilled water of 3 weight parts, and temperature is 70～80 ℃, stirs evenly, and gelatinization 30min obtains solution 1;B, free radical cause: take by weighing the ceric ammonium nitrate of 0.0012 weight part and the ammonium persulphate of 0.0108 weight part, be dissolved in the distilled water of 2 weight parts, temperature is 60～70 ℃, stirs evenly, and adds a step and obtains in the solution 1, and reaction 10min obtains solution 2;C, graft copolymerization: take by weighing the monomer acrylamide of 0.416 weight part, monomer 2-acrylamido-2 methyl propane sulfonic acid and 0.0045 parts by weight of cross-linking agent of 0.132 weight part, be dissolved in the distilled water of 3 weight parts, temperature is 60～70 ℃, stir evenly, and join in the solution 2, reaction obtains solution 3, and solution 3 is for colourless spawn or contain the gel strong solution; Wherein, the control of the dropping time of monomer acrylamide and monomer 2-acrylamido-2 methyl propane sulfonic acid is in 2～4h;D, hydrolysis: the NaOH of 0.13～0.14 weight part is dissolved in the distilled water of 4 weight parts, joins in the solution 3, hydrolysis 30min obtains crude product;E, dehydration, washing: with the crude product dehydration, with ethanol or acetone head product is soaked 6～12h then, washing obtains pure products;F, drying, pulverizing: with the pure products drying that the e step obtains, pulverize, namely.
- 9. each described slag of claim 1～8 production method of high-strength pumping anti-crack concrete of preparation of gathering materials is characterized in that comprising the steps:A, high-titanium dry slag sand, rubble are mixed with gelling material, stir evenly; And before feeding intake, the water ratio of high-titanium dry slag sand is 7～10%;B, adding part water stir evenly;C, remaining water and raw material are added, stir evenly, namely.
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| CN104446174A (en) * | 2014-10-30 | 2015-03-25 | 中国铁道科学研究院铁道建筑研究所 | High-crack-resistant concrete suitable for severe environment and construction method thereof |
| CN104973837A (en) * | 2015-07-13 | 2015-10-14 | 郑州大学 | C50-grade curing-free concrete and composite concrete pavement thereof |
| CN105084836A (en) * | 2015-08-14 | 2015-11-25 | 武汉理工大学 | C30 self-compaction microexpanded concrete-filled steel tube and preparation method thereof |
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| CN106542786A (en) * | 2016-10-08 | 2017-03-29 | 深圳海龙建筑科技有限公司 | Self-curing concrete and its production method |
| CN106832130A (en) * | 2016-12-12 | 2017-06-13 | 长安大学 | A kind of high tenacity cracking resistance cement concrete and preparation method thereof |
| CN108751811A (en) * | 2018-06-07 | 2018-11-06 | 湖北工业大学 | A kind of preparation method of no intensity negative effect and high interior maintenance efficiency concrete |
| CN112979209A (en) * | 2021-02-04 | 2021-06-18 | 中国石油大学(华东) | Novel composite shrinkage reducing agent for oil well cement, preparation method and application thereof |
| CN113620677A (en) * | 2021-09-14 | 2021-11-09 | 保利长大工程有限公司 | High-toughness low-shrinkage ultrahigh-performance concrete and preparation method thereof |
| CN113754386A (en) * | 2021-10-26 | 2021-12-07 | 云南中建西部建设有限公司 | Anti-ultraviolet radiation concrete and preparation method thereof |
| CN114988760A (en) * | 2022-04-02 | 2022-09-02 | 湖北工业大学 | Titanium slag polymer anticorrosive paint and preparation method thereof |
| CN117886560A (en) * | 2024-03-15 | 2024-04-16 | 石家庄铁道大学 | Geopolymer concrete containing temperature-sensitive SAP (super absorbent polymer) and preparation method thereof |
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