CN115286327A - Rapid-hardening micro-expansion high-crack-resistance curing material and preparation method thereof - Google Patents
Rapid-hardening micro-expansion high-crack-resistance curing material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 51
- 238000012423 maintenance Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000000694 effects Effects 0.000 claims abstract description 38
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 36
- 239000011707 mineral Substances 0.000 claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 29
- 229920005610 lignin Polymers 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 244000198134 Agave sisalana Species 0.000 claims abstract description 22
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011325 microbead Substances 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims description 46
- 235000010755 mineral Nutrition 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 27
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 26
- 229910052748 manganese Inorganic materials 0.000 claims description 26
- 239000011572 manganese Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010881 fly ash Substances 0.000 claims description 16
- 239000011863 silicon-based powder Substances 0.000 claims description 16
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- 238000000498 ball milling Methods 0.000 claims description 15
- 239000010453 quartz Substances 0.000 claims description 15
- 238000007873 sieving Methods 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 14
- 238000007667 floating Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 2
- 229910003002 lithium salt Inorganic materials 0.000 claims description 2
- 159000000002 lithium salts Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000000176 sodium gluconate Substances 0.000 claims description 2
- 229940005574 sodium gluconate Drugs 0.000 claims description 2
- 235000012207 sodium gluconate Nutrition 0.000 claims description 2
- 239000011083 cement mortar Substances 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 6
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 18
- 230000002787 reinforcement Effects 0.000 description 6
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- 230000007246 mechanism Effects 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
- C04B18/082—Cenospheres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a rapid hardening micro-expansion high crack resistance curing material and a preparation method thereof, belonging to the technical field of concrete materials. The material comprises 90-110 parts of sulphoaluminate cement, 30-40 parts of high-activity superfine early-strength mineral admixture, 1-5 parts of calcium oxide expanding agent, 5-10 parts of microbeads, 2-7 parts of silica fume, 50-80 parts of river sand, 1-3 parts of nano lignin fiber, 2-5 parts of sisal fiber, 6-8 parts of polycarboxylic acid powder water reducing agent, 1-3 parts of siloxane defoaming agent, 0.1-0.3 part of retarder and 0.01-0.06 part of early strength admixture by weight. The maintenance material can shorten the open traffic time, improve the maintenance efficiency and level and reduce the time cost. The requirements of large and small maintenance projects such as road repair, bridge expansion joint maintenance, municipal manhole cover maintenance, pouring, vibrating, plastering and maintenance can be met.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a rapid-hardening micro-expansion high-crack-resistance curing material and a preparation method thereof.
Background
In recent years, with the rapid development of infrastructure construction in China, the existing constructed expressway and bridge gradually enter into the maintenance stage, and the maintenance engineering quantity of the expressway and bridge is expected to increase greatly in the future. A large amount of infrastructure gradually enters a maintenance stage, however, the common cement-based material has the defects of slow hardening and long strength rise period, and the problem of traffic jam caused by no restriction or restriction during engineering maintenance and reinforcement cannot be met; the rapid hardening early strength cement is adopted to prepare the rapid hardening concrete, so that the problems of setting time and early strength are solved, the maintenance and reinforcement effects are poor due to the fact that the rapid hardening cement is large in hydration heat and easy to crack, and the service life cannot reach the expected effect. In view of the above, there is a need to develop a rapid hardening and micro-expansion high crack resistance curing material, which solves and breaks through the key core problem existing in the application of the traditional repair reinforcement material. The rapid-hardening micro-expansion high-crack-resistance maintenance material is adopted for maintenance construction, vehicles can be directly communicated after 3 hours of construction, the time cost of traffic jam caused by maintenance is saved, and the rapid-hardening micro-expansion high-crack-resistance maintenance material has a wide application prospect. Slag, steel slag, fly ash, silica fume and the like are common admixtures, and the research at the present stage is also directed to the admixtures, however, the academic community does not have a unified theory on the reinforcing mechanism of the admixtures, so that higher requirements are provided for the research on improving the concrete structure. Generally, high performance cement-based materials consist essentially of cement, ultra-fine particles, fine aggregate, fiber, and a high efficiency water reducing agent. But different raw material compositions, different grinding fineness, different doping amounts of exciting agents, different using amounts of dispersing agents and the like have obvious influence on indexes such as water requirement, particle grading, activity index, mechanical property and the like of the superfine mineral admixture; under the conditions that the influence trend cannot be determined and the enhancement mechanism is not determined, the ultrafine powder formula and the preparation process which are low in water demand, good in particle size distribution and high in activity index are screened out, and the research on a compact packing system of ultrafine powder and cement is still difficult.
Disclosure of Invention
Aiming at the requirements of large and small maintenance projects such as road repair, bridge expansion joint maintenance, municipal manhole cover maintenance and the like, the invention researches pouring, vibrating, plastering and maintenance, and provides a rapid-hardening and micro-expansion high-crack-resistance maintenance material and a preparation method thereof, which can improve the mechanical property of the maintenance material, realize on-site rapid maintenance and reinforcement, shorten the open traffic time, improve the maintenance efficiency and level and reduce the time cost.
In order to achieve the purpose, the invention provides the following technical scheme:
a rapid-hardening micro-expansion high-crack-resistance curing material comprises 90-110 parts of sulphoaluminate cement, 30-40 parts of high-activity superfine early-strength mineral admixture, 1-5 parts of calcium oxide expanding agent, 5-10 parts of micro-beads, 2-7 parts of micro silicon powder, 50-80 parts of river sand, 1-3 parts of nano lignin fiber and 2-5 parts of sisal fiber, 6-8 parts of polycarboxylic acid powder water reducing agent, 1-3 parts of siloxane defoaming agent and 0.01-0.06 part of early-strength agent by weight.
Further, the ratio of the matrix raw material to water is 1: (0.06-0.09).
Further, the high-activity superfine early-strength mineral admixture is prepared by ball milling and sieving 50-70 parts of fly ash floating bead, 10-30 parts of steel slag, 10-30 parts of manganese ore tailing slag, 20-30 parts of water-quenched manganese slag and 30-40 parts of quartz powder.
Furthermore, the specific surface area of the high-activity superfine early-strength mineral admixture is 1300-1500 m 2 Perkg, particle size of 10-20 μm.
Further, the granularity of the river sand is 30-50 mm; the micro silicon powder has the granularity of 30-80 mu m and the specific surface area of 30-40 m 2 G, 10-30 mm of granularity and 10-15 m of specific surface area 2 The volume of the silica fume is as follows (1-3): 1 ratio of the mixture. The invention adopts the mixed micro silicon powder with large and small grain sizes to improve the stacking density of the curing material, thereby further improving the strength of the curing material.
Further, the length of the nano lignin fiber is 10-20 mm, and the diameter of the nano lignin fiber is 0.1-0.2 mm; the sisal fiber has the length of 5-10 mm and the diameter of 0.2-0.3 mm. The curing material without adopting the fiber is subjected to linear change of a compression stress-strain curve, the breakage is obvious brittle fracture, the fracture energy is low, and the toughness and the ductility of the curing material can be improved by adding the nano lignin fiber and the sisal fiber, so that the compression strength and the breaking strength of the curing material can be improved.
Although silica fume has been studied in many documents, the present invention also tries silica fume as a raw material of high activity ultrafine early strength mineral admixtures together with other industrial by-products, however, the experimental results show that, the combination of the curing agent and other raw materials can improve the compressive strength of the curing material to a certain extent, but adverse effects appear on the aspects of the expansion degree and fluidity. Therefore, the present invention does not employ high activity ultra-fine early strength mineral admixtures as a suitable option when selecting their raw materials.
A preparation method of a rapid hardening micro-expansion high crack resistance curing material specifically comprises the following steps:
(1) Weighing 50-70 parts of fly ash floating beads, 10-30 parts of steel slag, 10-30 parts of manganese ore tailing slag, 20-30 parts of water-quenched manganese slag and 30-40 parts of quartz powder, uniformly mixing, putting into a ball mill, putting 1/3 weight parts of zirconia balls and 1/5 weight parts of water into the ball mill, carrying out ball milling for 1-3 hours, taking out the materials, and sieving to obtain a high-activity superfine early-strength mineral admixture;
(2) Weighing the raw materials according to the weight parts of the components, pouring the sulphoaluminate cement, the high-activity superfine early-strength mineral admixture, the calcium oxide expanding agent, the micro-beads, the micro-silicon powder and the river sand into a stirrer in sequence, uniformly mixing the raw materials through mechanical stirring, and continuously adding the retarder and the early-strength agent;
(3) Mixing the nano lignin fiber and the sisal fiber, and adding a siloxane defoaming agent to uniformly mix;
(4) Adding half of water into the stirrer, adding the polycarboxylic acid powder water reducing agent into the stirrer for 3 to 4 times within half an hour of continuous stirring, and continuously stirring for 0.5 to 1 hour;
(5) Adding the other half of water into the stirrer, stirring for 5-10 min, adding the mixture of the nano lignin fibers, the sisal fibers and the siloxane defoaming agent in the step (3), continuously stirring for 10-20 min, molding, and demolding after 24-48 h to obtain a maintenance material;
(6) Curing the curing material, wherein the curing conditions are as follows: curing in air at 20-40 deg.c and relative humidity of 80-90% for 12-24 hr.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention adopts the industrial byproducts of fly ash floating beads, steel slag, manganese ore tailing slag, water quenching manganese slag, quartz powder and the like as one of the main components of the curing material, can recycle a large amount of byproducts, can solve the problem of environmental pollution and reduce the production cost.
(2) The invention has simple preparation technology, and is suitable for researching pouring, vibrating and plastering aiming at large and small maintenance projects such as road repair, bridge expansion joint maintenance, municipal manhole cover maintenance and the like.
(3) Based on the compact packing theory, the invention optimizes the influence of the granularity, the content and the mixing step of each raw material on the working performance, the mechanical property, the shrinkage performance and the crack resistance of the rapid hardening micro-expansion high-crack-resistance maintenance material, and finally obtains the rapid hardening micro-expansion high-crack-resistance maintenance material with excellent performance.
(4) The prepared rapid-hardening micro-expansion high-crack-resistance curing material has the compressive strength of more than 25MPa in 3h, the breaking strength of more than 15MPa in 3h, the compressive strength of more than 70MPa in 24h and the breaking strength of more than 20MPa in 24 h; the expansion rate is 0.01-0.1% in 24 h; the 28d compressive strength reaches more than 120MPa, and the 28d flexural strength is more than 25 MPa; the 5min expansion degree reaches more than 600mm, and the 30min fluidity exceeds 400mm. The maintenance material can be used for maintenance and reinforcement, the open traffic time can be shortened, the maintenance efficiency and level can be improved, and the time cost can be reduced.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
The activity index of the high-activity superfine early-strength mineral admixture is tested by referring to GB/T18046-2017 granulated blast furnace slag powder used in cement, mortar and concrete; testing the slump and the expansion degree of the curing material by referring to GB/T50080-2016 Standard test method for the performance of common concrete mixtures; the mechanical property of the cured material is tested by referring to GB/T50081-2019 'concrete physical and mechanical property test method Standard'.
Example 1
The rapid-hardening micro-expansion high-crack-resistance maintenance material comprises 90 parts by weight of sulphoaluminate cement, 30 parts by weight of a high-activity superfine early-strength mineral admixture, 1 part by weight of a calcium oxide expanding agent, 5 parts by weight of microbeads, 2 parts by weight of micro silicon powder, 50 parts by weight of river sand, 1 part by weight of nano lignin fibers and 2 parts by weight of sisal fibers, 6 parts by weight of a polycarboxylic acid powder water reducing agent, 1 part by weight of a siloxane antifoaming agent, 0.1 part by weight of a boric acid retarder and 0.01 part by weight of a lithium carbonate early-strength agent. The ratio of the matrix raw material to water is 1:0.06. the high-activity superfine early-strength mineral admixture is prepared by ball milling and sieving 50 parts of fly ash floating beads, 10 parts of steel slag, 20 parts of slag and 30 parts of quartz powder. The specific surface area of the high-activity superfine early-strength mineral admixture is 1300m 2 Perkg, particle size 10 μm. The granularity of the river sand is 30mm; the micro silicon powder has the granularity of 30 mu m and the specific surface area of 30m 2 (g) particle size 10mm, specific surface area 10m 2 Micro silicon per gramThe powder is prepared according to the following steps of 1:1 ratio of the mixture. The length of the nano lignin fiber is 10mm, and the diameter of the nano lignin fiber is 0.1mm; the sisal fibers are 5mm in length and 0.2mm in diameter.
A preparation method of a rapid hardening micro-expansion high crack resistance curing material specifically comprises the following steps:
(1) Weighing 50 parts of fly ash floating beads, 10 parts of steel slag, 10 parts of manganese ore tailing slag, 20 parts of water-quenched manganese slag and 30 parts of quartz powder, uniformly mixing, putting into a ball mill, putting 1/3 of zirconia balls in parts by weight of materials, adding 1/5 of water, carrying out ball milling for 1 hour, taking out the materials, and sieving to obtain a high-activity superfine early-strength mineral admixture;
(2) Weighing the raw materials according to the weight parts of the components, pouring the sulphoaluminate cement, the high-activity superfine early-strength mineral admixture, the calcium oxide expanding agent, the micro-beads, the micro-silicon powder and the river sand into a stirrer in sequence, uniformly mixing the raw materials through mechanical stirring, and continuously adding the retarder and the early-strength agent;
(3) Mixing the nano lignin fiber and the sisal fiber, and adding a siloxane defoaming agent to uniformly mix;
(4) Adding half of water into the stirrer, adding the polycarboxylic acid powder water reducing agent into the stirrer for 3 times in half an hour of continuous stirring, and continuously stirring for 0.5h;
(5) Adding the other half of water into the stirrer, stirring for 5min, adding the mixture of the nano lignin fiber, the sisal fiber and the siloxane defoaming agent in the step (3), continuously stirring for 10min, then molding, and demolding after 24h to obtain the maintenance material; (6) curing the curing material, wherein the curing conditions are as follows: curing for 12 hours in air at the temperature of 20 ℃ and the relative humidity of 80-90 percent.
Comparative examples 1 to 2
Comparative examples 1-2 are identical to example 1 in composition and preparation method, except that the ratio of the base raw material and water of comparative example 1 is 1:0.05; the ratio of the base raw material and water of comparative example 1 was 1:0.12.
table 1 shows mechanical properties of the cured materials prepared in example 1 and comparative examples 1 to 2.
TABLE 1
The test results show that the water-gel ratio has influence on the mechanical property of the curing material, which is consistent with the rule of general research. When the water-gel ratio in the maintenance material is lower, the water requirement for internal hydration reaction is reduced; the working performance of the maintenance material can be improved to a certain extent by increasing the water-gel ratio, bubbles can be removed more easily due to good fluidity, the strength of the maintenance material can be improved, and the fluidity is increased along with the increase of the water-gel ratio, so that the compression strength, the breaking strength and the like are reduced.
Example 2
The rapid-hardening micro-expansion high-crack-resistance curing material comprises a matrix raw material and water, wherein the matrix raw material comprises, by weight, 110 parts of sulphoaluminate cement, 40 parts of a high-activity superfine early-strength mineral admixture, 5 parts of a calcium oxide type expanding agent, 10 parts of microbeads, 7 parts of micro silicon powder, 80 parts of river sand, 3 parts of nano lignin fibers, 5 parts of sisal fibers, 8 parts of a polycarboxylic acid powder water reducing agent, 3 parts of a siloxane defoaming agent, 0.3 part of a citric acid retarder and 0.06 part of a polymer lithium salt early-strength agent. The ratio of the matrix raw material to water is 1:0.09. the high-activity superfine early-strength mineral admixture is prepared by ball milling and sieving 70 parts of fly ash floating bead, 30 parts of steel slag, 30 parts of manganese ore tailing slag, 30 parts of water-quenched manganese slag and 40 parts of quartz powder. The specific surface area of the high-activity superfine early-strength mineral admixture is 1500m 2 Perkg, particle size 20 μm. The granularity of the river sand is 50mm; the micro silicon powder has the granularity of 80 mu m and the specific surface area of 40m 2 (g) particle size of 30mm and specific surface area of 15m 2 The volume ratio of silica fume/g is 3:1 ratio of the mixture. The length of the nano lignin fiber is 20mm, and the diameter of the nano lignin fiber is 0.2mm; the sisal fibers are 10mm in length and 0.3mm in diameter.
A preparation method of a rapid hardening micro-expansion high crack resistance curing material specifically comprises the following steps:
(1) Weighing 70 parts of fly ash floating beads, 30 parts of steel slag, 30 parts of manganese ore tailing slag, 30 parts of water-quenched manganese slag and 40 parts of quartz powder, uniformly mixing, putting into a ball mill, putting 1/3 of zirconia balls in parts by weight of materials, adding 1/5 of water, carrying out ball milling for 1-3 h, taking out the materials, and sieving to obtain a high-activity superfine early-strength mineral admixture;
(2) Weighing the raw materials according to the weight parts of the components, sequentially pouring the sulphoaluminate cement, the high-activity superfine early-strength mineral admixture, the calcium oxide expanding agent, the micro-beads, the micro-silicon powder and the river sand into a stirrer, and uniformly mixing the raw materials through mechanical stirring;
(3) Mixing the nano lignin fiber and the sisal fiber, adding the siloxane defoaming agent, uniformly mixing, and continuously adding the retarder and the early strength agent;
(4) Adding half of water into the stirrer, adding the polycarboxylic acid powder water reducing agent for 4 times in half an hour of continuous stirring, and continuously stirring for 1h;
(5) Adding the other half of water into the stirrer, stirring for 10min, adding the mixture of the nano lignin fiber, the sisal fiber and the siloxane defoaming agent in the step (3), continuously stirring for 20min, then molding, and demolding after 48h to obtain the maintenance material;
(6) Curing the curing material, wherein the curing conditions are as follows: curing in air at 40 deg.C and relative humidity of 90% for 24 hr.
Comparative examples 3 to 6
Comparative examples 3 to 6 are the same as example 2 in composition and preparation method, except that in comparative example 3, the ultra-fine early strength mineral admixture is prepared by ball milling and sieving 70 parts of silica fume, 30 parts of steel slag, 30 parts of manganese ore tailing slag, 20 parts of water-quenched manganese slag and 40 parts of quartz powder; in the comparative example 4, the superfine mineral admixture is prepared by ball milling and sieving 70 parts of fly ash floating bead, 30 parts of silica fume, 30 parts of manganese ore tailing slag, 20 parts of water-quenched manganese slag and 40 parts of quartz powder; the superfine mineral admixture in the comparative example 5 is prepared by ball milling and sieving 70 parts of fly ash floating bead, 30 parts of steel slag, 30 parts of silica fume and 40 parts of quartz powder; the superfine mineral admixture in the comparative example 6 is prepared by ball milling and sieving 70 parts of fly ash floating bead, 30 parts of steel slag, 30 parts of manganese ore tailing slag, 20 parts of water-quenched manganese slag and 40 parts of silica fume.
Table 2 shows the mechanical properties of the cured materials prepared in example 2 and comparative examples 3 to 6.
TABLE 2
Experimental data show that the curing material prepared by the invention has excellent mechanical properties, and when the silica fume is used as the high-activity superfine early-strength mineral admixture, the mechanical properties are more consistent with those of the application, but the data of 5min expansion and 30min fluidity are obviously lower than those of the application.
Example 3
The rapid-hardening micro-expansion high-crack-resistance maintenance material comprises a matrix raw material and water, wherein the matrix raw material comprises, by weight, 100 parts of sulphoaluminate cement, 35 parts of a high-activity superfine early-strength mineral admixture, 2 parts of a calcium oxide type expanding agent, 7 parts of microbeads, 5 parts of micro silicon powder, 60 parts of river sand, 2 parts of nano lignin fibers, 3 parts of sisal fibers, 7 parts of a polycarboxylic acid powder water reducing agent, 2 parts of a siloxane defoaming agent, 0.2 part of a sodium gluconate retarder and 0.03 part of a sodium carbonate early-strength agent. The ratio of the matrix raw material to water is 1:0.07. the high-activity superfine early-strength mineral admixture is prepared by performing ball milling and sieving on 60 parts of fly ash floating beads, 20 parts of steel slag, 20 parts of manganese ore tailing slag, 25 parts of water-quenched manganese slag and 35 parts of quartz powder. The specific surface area of the high-activity superfine early-strength mineral admixture is 1400m 2 Perkg, particle size 15 μm. The granularity of the river sand is 40mm; the micro silicon powder has the granularity of 50 mu m and the specific surface area of 35m 2 (g) particle size of 20mm and specific surface area of 12m 2 The volume ratio of silica fume to silica fume is 2:1 ratio of the mixture. The length of the nano lignin fiber is 15mm, and the diameter of the nano lignin fiber is 0.15mm; the sisal fibers are 7mm in length and 0.25mm in diameter.
A preparation method of a rapid hardening micro-expansion high-crack-resistance curing material specifically comprises the following steps:
(1) Weighing 60 parts of fly ash bleaching, 20 parts of steel slag, 20 parts of manganese ore tailing slag, 25 parts of water-quenched manganese slag and 35 parts of quartz powder, uniformly mixing, putting into a ball mill, adding 1/3 of zirconia balls in parts by weight of materials, adding 1/5 of water, carrying out ball milling for 1-3 h, taking out the materials, and sieving to obtain a high-activity superfine early-strength mineral admixture;
(2) Weighing the raw materials according to the weight parts of the components, pouring the sulphoaluminate cement, the high-activity superfine early-strength mineral admixture, the calcium oxide expanding agent, the micro-beads, the micro-silicon powder and the river sand into a stirrer in sequence, uniformly mixing the raw materials through mechanical stirring, and continuously adding the retarder and the early-strength agent;
(3) Mixing the nano lignin fiber and the sisal fiber, and adding a siloxane defoaming agent to uniformly mix;
(4) Adding half of water into the stirrer, adding the polycarboxylic acid powder water reducing agent into the stirrer for 3 times in half an hour of continuous stirring, and continuously stirring for 0.8h;
(5) Adding the other half of water into the stirrer, stirring for 8min, adding the mixture of the nano lignin fiber, the sisal fiber and the siloxane defoaming agent in the step (3), continuously stirring for 15min, then molding, and removing the mold after 36h to obtain a maintenance material; (6) curing the curing material, wherein the curing conditions are as follows: curing in air at 30 deg.C and 85% relative humidity for 18h.
Comparative examples 7 to 8
Comparative examples 7 to 8 are identical to example 3 in composition and preparation method, except that the microsilica of comparative example 7 has a particle size of 50 μm and a specific surface area of 35m 2 Per gram of silica fume; in comparative example 7, the microsilica has a particle size of 20mm and a specific surface area of 12m 2 Silica fume per gram.
Table 3 shows the mechanical properties of the cured materials prepared in example 3 and comparative examples 7 to 8.
TABLE 3
The experimental data of the invention show that: the performance of the silica fume with single grain size is poorer in all aspects than that of the silica fume with different grain sizes. This also reflects laterally the effect of the particle size of the material on the mechanical properties of the cured material.
Table 4 shows the activity indexes of the ultrafine mineral admixtures of examples 1 to 3 and comparative examples 1 to 8.
TABLE 1
According to the experimental data, the high-activity superfine early-strength mineral admixture prepared by ball milling and sieving the fly ash floating beads, the steel slag, the manganese ore tailing slag, the water-quenched manganese slag and the quartz powder has higher activity index than the admixture prepared by taking the silica fume as the raw material.
The rapid-hardening micro-expansion high-crack-resistance curing material prepared by the invention has the advantages that the 3h compressive strength reaches more than 25MPa, the 3h flexural strength reaches more than 15MPa, the 24h compressive strength reaches more than 70MPa, and the 24h flexural strength reaches more than 20 MPa; the expansion rate is 0.01-0.1% in 24 h; the 28d compressive strength reaches more than 120MPa, and the 28d flexural strength is more than 25 MPa; the 5min expansion degree reaches more than 600mm, and the 30min fluidity exceeds 400mm. The maintenance material can be used for maintenance and reinforcement, the open traffic time can be shortened, the maintenance efficiency and level can be improved, and the time cost can be reduced.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. A rapid hardening micro-expansion high crack resistance curing material is characterized in that: the cement mortar comprises 90-110 parts of sulphoaluminate cement, 30-40 parts of high-activity superfine early strength mineral admixture, 1-5 parts of calcium oxide expanding agent, 5-10 parts of micro-beads, 2-7 parts of micro silicon powder, 50-80 parts of river sand, 1-3 parts of nano lignin fiber, 2-5 parts of sisal fiber, 6-8 parts of polycarboxylic acid powder water reducing agent, 1-3 parts of siloxane defoaming agent, 0.1-0.3 part of retarder and 0.01-0.06 part of early strength agent.
2. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the ratio of the matrix raw material to water is 1: (0.06-0.09).
3. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the high-activity superfine early-strength mineral admixture is prepared by ball milling and sieving 50-70 parts of fly ash floating beads, 10-30 parts of steel slag, 10-30 parts of manganese ore tailing slag, 20-30 parts of water-quenched manganese slag and 30-40 parts of quartz powder.
4. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the specific surface area of the high-activity superfine early-strength mineral admixture is 1300-1500 m 2 Perkg, particle size of 10-20 μm.
5. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the granularity of the river sand is 30-50 mm; the micro silicon powder has the granularity of 30-80 mu m and the specific surface area of 30-40 m 2 G, 10-30 mm of granularity and 10-15 m of specific surface area 2 The volume of the silica fume is as follows (1-3): 1 ratio of the mixture.
6. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the length of the nano lignin fiber is 10-20 mm, and the diameter of the nano lignin fiber is 0.1-0.2 mm; the sisal fiber has the length of 5-10 mm and the diameter of 0.2-0.3 mm.
7. The rapid hardening micro-expansion high crack resistance curing material as claimed in claim 1, wherein: the retarder is one or two of boric acid, citric acid and sodium gluconate; the early strength agent is one or two of lithium carbonate, polymer lithium salt and sodium carbonate.
8. The preparation method of the rapid-hardening micro-expansion high-crack-resistance curing material is characterized by comprising the following steps of:
(1) Weighing 50-70 parts of fly ash floating beads, 10-30 parts of steel slag, 20-30 parts of slag and 30-40 parts of quartz powder, uniformly mixing, putting into a ball mill, adding 1/3 of zirconia balls by weight of the materials, adding 1/5 of water, carrying out ball milling for 1-3 h, taking out the materials, and sieving;
(2) Weighing the raw materials according to the weight parts of the components, sequentially pouring the sulphoaluminate cement, the high-activity superfine early-strength mineral admixture, the calcium oxide expanding agent, the micro-beads, the micro-silicon powder and the river sand into a stirrer, and uniformly mixing the raw materials through mechanical stirring;
(3) Mixing the nano lignin fiber and the sisal fiber, and adding a siloxane defoaming agent to uniformly mix;
(4) Adding half of water into the stirrer, adding the polycarboxylic acid powder water reducing agent into the stirrer within 3 to 4 times of half an hour of continuous stirring, and continuously stirring the mixture for 0.5 to 1 hour;
(5) Adding the other half of water into the stirrer, stirring for 5-10 min, adding the mixture of the nano lignin fiber, the sisal fiber and the siloxane defoaming agent in the step (3), continuously stirring for 10-20 min, then molding, and demolding after 24-48 h to obtain the maintenance material;
(6) Curing the curing material, wherein the curing conditions are as follows: curing in air at 20-40 deg.c and relative humidity of 80-90% for 12-24 hr.
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