CN113185199A - Cement stabilizing material and preparation method thereof - Google Patents
Cement stabilizing material and preparation method thereof Download PDFInfo
- Publication number
- CN113185199A CN113185199A CN202110537203.4A CN202110537203A CN113185199A CN 113185199 A CN113185199 A CN 113185199A CN 202110537203 A CN202110537203 A CN 202110537203A CN 113185199 A CN113185199 A CN 113185199A
- Authority
- CN
- China
- Prior art keywords
- cement
- coarse aggregate
- regenerated coarse
- base material
- stabilizing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 110
- 239000004568 cement Substances 0.000 title claims abstract description 80
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 239000010703 silicon Substances 0.000 claims abstract description 19
- 230000003213 activating effect Effects 0.000 claims abstract description 14
- 239000012190 activator Substances 0.000 claims abstract description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims abstract description 6
- 239000012188 paraffin wax Substances 0.000 claims abstract description 6
- 239000007822 coupling agent Substances 0.000 claims abstract description 4
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 claims abstract description 4
- 239000010426 asphalt Substances 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims description 50
- 239000004576 sand Substances 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 19
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 16
- 239000010440 gypsum Substances 0.000 claims description 15
- 229910052602 gypsum Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 230000003019 stabilising effect Effects 0.000 claims description 4
- 150000004645 aluminates Chemical class 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 14
- 239000004566 building material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 16
- YRYCXMBFJDGADV-UHFFFAOYSA-N dimethyl(propyl)silicon Chemical group CCC[Si](C)C YRYCXMBFJDGADV-UHFFFAOYSA-N 0.000 description 15
- 238000003756 stirring Methods 0.000 description 11
- 239000002699 waste material Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 229920002050 silicone resin Polymers 0.000 description 4
- 230000004913 activation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004578 natural building material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
-
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1051—Organo-metallic compounds; Organo-silicon compounds, e.g. bentone
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the technical field of building materials, and particularly discloses a cement stabilizing material and a preparation method thereof. The cement stabilizing material is prepared from a base material and water, wherein the weight of the water accounts for 5-8% of the total weight of the base material; the base material is prepared from the following raw materials in percentage by weight: 1.5 to 6.7 percent of cement, 60 to 82 percent of regenerated coarse aggregate, 15 to 33 percent of natural fine aggregate and 0.5 to 2 percent of activator; the activating agent is selected from one or more of silane coupling agent, titanic acid coupling agent, organic silicon resin solution, paraffin emulsion and emulsified asphalt. The regenerated coarse aggregate is treated by the activating agent, the water absorption rate of the regenerated coarse aggregate can be reduced, the cement stabilizing material prepared by the proportioning design of the application has good strength, and the prepared highway base course has good strength.
Description
Technical Field
The application relates to the technical field of building materials, in particular to a cement stabilizing material and a preparation method thereof.
Background
The cement stabilizing material is a mixture of aggregate, cement, water and the like after being mixed, the mixture can be used as a base layer or a subbase layer of a pavement after being paved, rolled and maintained, the base layer is a bearing layer of the whole pavement and plays a role in stabilizing the pavement, and therefore the quality of the cement stabilizing material is directly related to the quality and the service performance of the pavement.
Along with the vigorous development of the building industry in China, a road and a high-rise building are continuously built, meanwhile, a building or a road built in an early stage also reaches the stage of building or expansion, so the demand on building materials is more urgent at the moment, however, after decades of over exploitation, stones suitable for road engineering are less and less, meanwhile, along with the removal of an old building and the maintenance of an old road, more and more building wastes are emerged, under the environment that more and more building wastes are used and natural building materials are less and less, how to recycle the building wastes and realize the recycling of resources is a difficult problem which needs to be solved urgently.
At present, waste concrete can be crushed and screened to prepare regenerated aggregate, but the regenerated aggregate prepared by simple crushing and screening processes has many edges and corners, rough surface and hardened cement mortar contained in the components, and in addition, concrete blocks are damaged and accumulated in the interior to cause a large amount of microcracks in the crushing process, so that the factors are combined to result in large porosity, large water absorption, small stacking density, large porosity and high crushing index of the regenerated aggregate. And the recycled cement stabilizing material prepared by the recycled aggregate has low strength after hardening, poor impermeability, frost resistance and carbonization resistance and poor durability, so in order to improve the performance of recycled concrete, the low-quality recycled aggregate material obtained by simple crushing needs to be reinforced, at present, the most common method is to improve the aggregate particle shape and remove the hardened cement attached to the surface of the recycled aggregate, but the inventor finds that the compressive strength of the recycled aggregate after the existing reinforcement treatment is poor when the recycled aggregate is applied to the cement stabilizing material.
Disclosure of Invention
In order to improve the strength of the cement stabilizing material, the application provides a cement stabilizing material and a preparation method thereof.
In a first aspect, the present application provides a cement stabilizing material, which adopts the following technical scheme:
a cement stabilizing material is prepared from a base material and water, wherein the weight of the water accounts for 5-8% of the total weight of the base material;
the base material is prepared from the following raw materials in percentage by weight:
1.5 to 6.7 percent of cement, 60 to 82 percent of regenerated coarse aggregate, 15 to 33 percent of natural fine aggregate and 0.5 to 2 percent of activator;
the activating agent is selected from one or more of silane coupling agent, titanic acid coupling agent (tetraisopropyl dititanate), organic silicon resin solution, paraffin emulsion and emulsified asphalt.
Through adopting above-mentioned technical scheme, this application is through the activator to the reinforcement treatment of regeneration coarse aggregate, can improve the density of regeneration coarse aggregate, and the water absorption and the crushing value of regeneration coarse aggregate are reduced to hole and the gap on shutoff regeneration coarse aggregate surface. According to the proportion designed in the application, the cement, the regenerated coarse aggregate, the natural fine aggregate, the activating agent and the water are prepared into the cement stabilizing material, so that the strength and the durability of the cement stabilizing material can be improved. The cement stabilizing material is suitable for being applied to a pavement base.
In the present application, the titanic acid coupling agent is tetraisopropyl dititanate.
Preferably, the activating agent is a silane coupling agent and a silicone resin solution; more preferably, the weight ratio of the silane coupling agent to the silicone resin solution is (1-5): 1.
in the present application, the silane coupling agent is propyldimethylsilane. The organic silicon resin solution is a colorless transparent liquid at normal temperature, has the Brookfield viscosity of 5.0mPa.s at 25 ℃, and has better fluidity. In the application, the silane coupling agent and the organic silicon resin solution are mixed according to the weight ratio of (1-5): 1 as an activator, so that the activator has good sealing property and adhesion property, can be well attached to the surface of the regenerated coarse aggregate, and can well block gaps and gaps, thereby reducing the water absorption rate of the aggregate.
Preferably, the crushed value of the reclaimed coarse aggregate is 23 to 26.3%.
By adopting the technical scheme, the regenerated coarse aggregate with the crushing value of 23-26.3% is selected, so that the strength and the durability of the cement stabilizing material are improved.
In order to reduce the crushing value of the reclaimed coarse aggregate, the applicant has found that the strength of the reclaimed coarse aggregate can be improved and the crushing value can be reduced by heating and ball-milling the reclaimed coarse aggregate after purchase, screening and cleaning. The heating temperature may be 150-170 ℃.
Preferably, the natural fine aggregate has an apparent density of 2.0 to 2.5g/cm3The sand equivalent is 65.2-79.8%.
Selecting apparent density of 2.0-2.5g/cm3And the sand equivalent is 65.2-79.8% of natural fine aggregate, so that the filling effect is better. In the present application, the natural fine aggregate may be river sand, mountain sand or sea sand, preferably river sand.
Preferably, the base material also comprises an early strength agent, and the dosage of the early strength agent accounts for 0.2-0.8% of the dosage of the base material. Further preferably, the early strength agent is selected from one or more of sulphoaluminate, silicate, aluminate and gypsum; still further preferably, the early strength agent is sulphoaluminate, silicate and gypsum; most preferably, the weight ratio of the sulphoaluminate, the silicate and the gypsum is (1-3): (0.5-2):1.
The early strength agent is an additive which can improve the early strength of concrete and has no obvious influence on the later strength. In the application, one or more early strength agents of sulphoaluminate, silicate, aluminate and gypsum are added into the base material, so that the early strength and the frost resistance of the cement stabilizing material can be enhanced. When the weight ratio of (1-3): (0.5-2):1, sulfoaluminate, silicate and gypsum as early strength agents, not only can enhance the early strength and frost resistance of the cement-stabilizing material, but also can reduce the water absorption thereof, thereby improving the strength and durability thereof.
In a second aspect, the present application provides a method for preparing a cement stabilizing material, which adopts the following technical scheme:
a method for preparing a cement stabilizing material, comprising the steps of:
preheating the regenerated coarse aggregate to 30-40 ℃ according to a set proportion, uniformly mixing an activating agent with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, keeping for 2-4min, and then maintaining for 8-20h at 83-92 ℃; then evenly mixing the cement with the natural fine aggregate to obtain a base material; finally, the base material is mixed with water and stirred evenly, thus obtaining the cement stabilizing material.
By adopting the technical scheme, the regenerated coarse aggregate is treated by the activating agent, then is mixed with other base materials, and finally is mixed with water, so that the hydraulic stable material can be prepared. In addition, when the activator is used for treating the regenerated coarse aggregate, the regenerated coarse aggregate is preheated to 30-40 ℃, then the activator is uniformly mixed with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, the mixture is kept for 2-4min, and then the mixture is maintained at 83-92 ℃ for 8-20h, so that the activator can block or close gaps or cracks of the regenerated coarse aggregate, the water absorption rate of the regenerated coarse aggregate is reduced, and the strength of the cement stabilizing material is improved.
Preferably, when the early strength agent is added, the early strength agent is uniformly mixed with the cement and then is mixed with other base materials.
By adopting the technical scheme, the early strength agent is uniformly mixed with the cement and then mixed with other base materials, so that the utilization rate of the early strength agent is favorably increased, and the waste of the early strength agent is reduced.
In summary, the present application has the following beneficial effects:
1. the cement stabilizing material designed according to the proportion of the cement stabilizing material has good strength;
2. the regenerated coarse aggregate is treated by the activating agent, so that the water absorption of the regenerated coarse aggregate can be reduced.
3. The recycled coarse aggregate is preferably adopted in the application, so that the reasonable utilization of the waste concrete is realized, the resource saving is facilitated, and the environment is protected.
Detailed Description
In the examples, the crushed value of the reclaimed coarse aggregate was 23 to 26.3%;
the natural fine aggregate is river sand with apparent density of 2.0-2.5g/cm3The sand equivalent is 65.2-79.8%.
Examples
Example 1
Preheating 63.5kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 2kg of paraffin emulsion with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing activated regenerated coarse aggregate, 1.5kg of cement and 33kg of river sand to obtain a base material;
the base material is mixed with 8kg of water and stirred evenly to obtain the cement stabilizing material.
Example 2
Preheating 78kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.5kg of paraffin emulsion with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 6.5kg of cement and 15kg of river sand to obtain a base material;
the base material is mixed with 5kg of water and stirred evenly to obtain the cement stabilizing material.
Example 3
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.5kg of paraffin emulsion with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 4kg of cement and 20kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 4
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.5kg of propyldimethylsilane and 0.5kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 4kg of cement and 20kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 5
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 1kg of propyldimethylsilane and 0.2kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, keeping for 2min, and maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 4kg of cement and 20kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 6
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 4kg of cement and 20kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 7
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.5kg of propyldimethylsilane and 1kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a mode of stirring while spraying, keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
uniformly mixing the activated regenerated coarse aggregate, 4kg of cement and 20kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 8
Preheating 75kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
mixing 0.2kg of silicate and 3.8kg of cement uniformly, and then mixing the mixture with activated regenerated coarse aggregate and 19.5kg of river sand uniformly to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 9
Preheating 71.5kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 1.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 10
Preheating 70.5kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
3kg of sulphoaluminate, 0.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 11
Preheating 71kg of regenerated coarse aggregate to 40 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a manner of stirring while spraying, then keeping for 2min, and then maintaining at 83 ℃ for 18h to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 2kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 12
Preheating 71.5kg of regenerated coarse aggregate to 30 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a mode of stirring while spraying, keeping for 4min, and then maintaining for 8h at 90 ℃ to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 1.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 13
Preheating 71.5kg of regenerated coarse aggregate to 37 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a mode of stirring while spraying, then keeping for 3min, and then maintaining for 10h at 90 ℃ to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 1.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 14
Uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with 71.5kg of regenerated coarse aggregate in a manner of spraying and mixing at the same time, and then maintaining the mixture at 90 ℃ for 10 hours to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 1.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 15
Preheating 71.5kg of regenerated coarse aggregate to 37 ℃, uniformly mixing 0.8kg of propyldimethylsilane and 0.3kg of organic silicon resin solution, uniformly mixing the mixture with the regenerated coarse aggregate in a mode of stirring while spraying, then keeping for 3min, and then maintaining for 24h in a natural state to obtain activated regenerated coarse aggregate;
1kg of sulphoaluminate, 1.5kg of silicate, 1kg of gypsum and 3.8kg of cement are uniformly mixed, and then the mixture is uniformly mixed with activated regenerated coarse aggregate and 19.5kg of river sand to obtain a base material;
the base material is mixed with 6.7kg of water and stirred evenly to obtain the cement stabilizing material.
Example 16
Example 16 differs from example 13 only in that in example 16, the apparent density of the river sand is 2.62 to 2.8g/cm3The sand equivalent was 82-87%, the remainder being in accordance with example 13.
Comparative example
Comparative example 1
Comparative example 1 differs from example 11 only in that: in comparative example 1, the reclaimed coarse aggregate was replaced with an equal amount of natural coarse aggregate, and the remainder was the same as in example 11.
Comparative example 2
Comparative example 2 differs from example 11 only in that: in comparative example 2, no activator was used and the remainder was the same as in example 11.
Comparative example 3
Comparative example 3 differs from example 11 only in that: in comparative example 3, the cement was 15% of the total binder, and the remainder was the same as in example 11.
Performance test
1. Indexes such as water absorption rate (T0305-2005) and crushing value (T0316-2005) of the coarse aggregates (regenerated coarse aggregate and natural coarse aggregate) in examples 1-16 and comparative examples 1-3 of the present application were examined according to JTG E42-2005 Highway engineering aggregate test Specification, and the specific examination results are shown in Table 1 below.
In this application, examples 1 to 16 and comparative examples 1 to 3 used the same lot of recycled coarse aggregates, and therefore, before the activation treatment, 3 parallel samples were taken to measure the water absorption and crushing values, respectively, and then the average values of 5.2% and 24.8% were taken as the water absorption and crushing values before activation of the recycled coarse aggregates of examples 1 to 16 and comparative examples 1 to 3, respectively.
The crush value is a measure of the ability of the aggregate to resist crushing under increasing loads and is a measure of the mechanical properties of the aggregate to assess its suitability for use in highway engineering.
TABLE 1
As can be seen by combining examples 1-3 with comparative example 2 Table 1, the water absorption and crush values of the reclaimed coarse aggregate are reduced by using the activator of the present application.
It can be seen from examples 4 to 7 in combination with Table 1 that the reduction in the water absorption and crush values of the activated regenerated coarse aggregate is greatest when the silane coupling agent (propyldimethylsilane) and the silicone resin solution are made into an activator in a weight ratio (2.7 to 5): 1.
As can be seen by combining examples 8-11 with Table 1, the mixing of the thioaluminate, silicate and gypsum in a weight ratio of 1(1.5-2):1 reduced the water absorption and crush values of the reclaimed coarse aggregate.
In combination with examples 12-15 and Table 1, it can be seen that when the activating agent is used to treat the regenerated coarse aggregate, the activating method of the present application is adopted to preheat the regenerated coarse aggregate to 30-40 ℃, then the activating agent is uniformly mixed with the regenerated coarse aggregate in a manner of spraying and mixing at the same time, the mixture is kept for 2-4min, and finally the mixture is maintained at 83-92 ℃ for 8-20h, which is beneficial to reducing the water absorption rate and the crushing value of the regenerated coarse aggregate.
2. Unconfined compressive strength of the cement stabilizing materials in examples 1-16 and comparative examples 1-3 of the application is tested according to JTG E51-2009 test procedure for inorganic binder stabilizing materials for highway engineering, and specific test results are shown in Table 2 below.
TABLE 2
As can be seen by combining examples 1-3 with comparative example 2 Table 1, the compressive strength of cement stabilized materials is enhanced by the use of the activators of the present application.
As can be seen by combining examples 4-7 with Table 1, the increase in compressive strength of cement-stabilizing materials is most pronounced when the silane coupling agent (propyldimethylsilane) and the silicone resin solution are made into the activator in a weight ratio of (2.7-5): 1.
As can be seen by combining examples 8-11 with Table 1, the mixing of the sulphoaluminate, silicate and gypsum in a weight ratio of 1(1.5-2):1 enhances the compressive strength of the cement stabilising material.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The cement stabilizing material is characterized by being prepared from a base material and water, wherein the weight of the water accounts for 5-8% of the total weight of the base material;
the base material is prepared from the following raw materials in percentage by weight:
1.5 to 6.7 percent of cement, 60 to 82 percent of regenerated coarse aggregate, 15 to 33 percent of natural fine aggregate and 0.5 to 2 percent of activator;
the activating agent is selected from one or more of silane coupling agent, titanic acid coupling agent, organic silicon resin solution, paraffin emulsion and emulsified asphalt.
2. The cement stabilizing material as claimed in claim 1, wherein: the activating agent is a silane coupling agent and an organic silicon resin solution.
3. The cement stabilizing material as claimed in claim 2, wherein: the weight ratio of the silane coupling agent to the organic silicon resin solution is (1-5): 1.
4. the cement stabilizing material as claimed in claim 1, wherein: the crushing value of the regenerated coarse aggregate is 23-26.3%.
5. The cement stabilizing material as claimed in claim 1, wherein: the apparent density of the natural fine aggregate is 2.0-2.5g/cm3The sand equivalent is 65.2-79.8%.
6. The cement stabilising material of any one of claims 1-5, wherein: the base material also comprises an early strength agent, and the dosage of the early strength agent accounts for 0.2-0.8% of the dosage of the base material.
7. The cement stabilizing material as claimed in claim 6, wherein: the early strength agent is selected from one or more of sulphoaluminate, silicate, aluminate and gypsum.
8. A method of preparing a cement stabilising material as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:
preheating the regenerated coarse aggregate to 30-40 ℃ according to a set proportion, uniformly mixing an activating agent with the regenerated coarse aggregate in a mode of spraying and mixing at the same time, keeping for 2-4min, and then maintaining for 8-20h at 83-92 ℃; then evenly mixing the cement with the natural fine aggregate to obtain a base material; finally, the base material is mixed with water and stirred evenly, thus obtaining the cement stabilizing material.
9. A method of preparing a cement stabilising material as claimed in claim 8, wherein: when the early strength agent is added, the early strength agent is uniformly mixed with the cement and then is mixed with other base materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537203.4A CN113185199A (en) | 2021-05-17 | 2021-05-17 | Cement stabilizing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537203.4A CN113185199A (en) | 2021-05-17 | 2021-05-17 | Cement stabilizing material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113185199A true CN113185199A (en) | 2021-07-30 |
Family
ID=76982177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110537203.4A Pending CN113185199A (en) | 2021-05-17 | 2021-05-17 | Cement stabilizing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113185199A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195439A (en) * | 2021-12-24 | 2022-03-18 | 无锡市政设计研究院有限公司 | Design method for mix proportion of high-doping-amount construction waste cement stabilized macadam |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1990410A (en) * | 2005-12-27 | 2007-07-04 | 尹小林 | Cement regeneration technique by activating discarded concrete |
| CN105198336A (en) * | 2015-11-17 | 2015-12-30 | 广西云燕特种水泥建材有限公司 | Seashore building cement resisting strong wind and big waves |
| CN107640937A (en) * | 2017-08-11 | 2018-01-30 | 汤始建华建材（苏州）有限公司 | A kind of light-high-strength concrete |
| CN108840624A (en) * | 2018-07-09 | 2018-11-20 | 武汉理工大学 | A kind of rapid curing light weight board and preparation method thereof suitable for assembled architecture |
| CN109437761A (en) * | 2018-12-18 | 2019-03-08 | 中建西部建设(天津)有限公司 | A kind of preparation method of energy conservation and environmental protection lightweight aggregate concrete |
| CN109608077A (en) * | 2018-12-18 | 2019-04-12 | 中建西部建设(天津)有限公司 | A kind of preparation method of modification regeneration aggregate and regeneration concrete |
| CN111088979A (en) * | 2019-12-03 | 2020-05-01 | 南华大学 | Downward access filling mining method |
| CN111574174A (en) * | 2020-05-28 | 2020-08-25 | 河北智晖建筑安装工程有限公司 | Quick-setting, quick-hardening, super-early-strength and high-crack-resistance pavement repairing material and preparation method thereof |
| CN111825362A (en) * | 2020-07-28 | 2020-10-27 | 深圳港创建材股份有限公司 | Modification method for reducing water absorption of recycled coarse aggregate |
| CN112608094A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | High-strength concrete prepared from recycled aggregate and preparation method thereof |
-
2021
- 2021-05-17 CN CN202110537203.4A patent/CN113185199A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1990410A (en) * | 2005-12-27 | 2007-07-04 | 尹小林 | Cement regeneration technique by activating discarded concrete |
| CN105198336A (en) * | 2015-11-17 | 2015-12-30 | 广西云燕特种水泥建材有限公司 | Seashore building cement resisting strong wind and big waves |
| CN107640937A (en) * | 2017-08-11 | 2018-01-30 | 汤始建华建材（苏州）有限公司 | A kind of light-high-strength concrete |
| CN108840624A (en) * | 2018-07-09 | 2018-11-20 | 武汉理工大学 | A kind of rapid curing light weight board and preparation method thereof suitable for assembled architecture |
| CN109437761A (en) * | 2018-12-18 | 2019-03-08 | 中建西部建设(天津)有限公司 | A kind of preparation method of energy conservation and environmental protection lightweight aggregate concrete |
| CN109608077A (en) * | 2018-12-18 | 2019-04-12 | 中建西部建设(天津)有限公司 | A kind of preparation method of modification regeneration aggregate and regeneration concrete |
| CN111088979A (en) * | 2019-12-03 | 2020-05-01 | 南华大学 | Downward access filling mining method |
| CN111574174A (en) * | 2020-05-28 | 2020-08-25 | 河北智晖建筑安装工程有限公司 | Quick-setting, quick-hardening, super-early-strength and high-crack-resistance pavement repairing material and preparation method thereof |
| CN111825362A (en) * | 2020-07-28 | 2020-10-27 | 深圳港创建材股份有限公司 | Modification method for reducing water absorption of recycled coarse aggregate |
| CN112608094A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | High-strength concrete prepared from recycled aggregate and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| 中国硅酸盐学会房屋建筑材料分会: "《房建材料与绿色建筑》", 31 August 2009, 中国建材工业出版社 * |
| 宋进朝等: "我国建筑垃圾再生处理技术研究", 《现代制造技术与装备》 * |
| 张宜洛等: "沥青稳定再生集料的试验研究", 《建筑材料学报》 * |
| 肖益民等: "再生粗集料混凝土路用性能研究", 《公路交通科技(应用技术版)》 * |
| 陈新杰等: "再生骨料混凝土在道路基层中的应用研究", 《中外公路》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195439A (en) * | 2021-12-24 | 2022-03-18 | 无锡市政设计研究院有限公司 | Design method for mix proportion of high-doping-amount construction waste cement stabilized macadam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102020594B1 (en) | Recycled cold asphalt concrete mixture and Construction thereof | |
| CN108046663B (en) | Steel slag-doped recycled asphalt concrete and preparation method thereof | |
| CN111574133B (en) | Cement-stabilized macadam base material, preparation method thereof and asphalt pavement | |
| WO2013066942A1 (en) | Utilization of heavy oil ash to produce high quality concrete | |
| CN112029306A (en) | Preparation method of epoxy modified emulsified asphalt with shape memory performance | |
| CN111501485B (en) | In-situ cold regeneration modification method for foamed asphalt combined pavement with cementation sealing layer | |
| CN113045246A (en) | Asphalt pavement material capable of recycling waste glass fiber reinforced plastics and steel slag and preparation method thereof | |
| CN112777981A (en) | Low-cost high-performance fully-recycled aggregate mortar and preparation method thereof | |
| CN113863082B (en) | BRT station heavy-load traffic road section paving structure and construction method | |
| CN103864370B (en) | A kind of slag scrap rubber cast waste sand pavement material and prepare laying method | |
| CN109293289B (en) | Method for preparing concrete with equal strength by recycling concrete laitance | |
| Yan et al. | Study on preparation and performance of steel slag asphalt mixture based on steel slag aggregate | |
| KR101645321B1 (en) | Recycled cold asphalt concrete mixture and Construction thereof | |
| CN113185199A (en) | Cement stabilizing material and preparation method thereof | |
| Liu et al. | Material innovation and performance optimization of multi-solid waste-based composite grouting materials for semi-flexible pavements | |
| CN108147727B (en) | High-strength asphalt concrete pavement construction method | |
| KR102207012B1 (en) | Water-Impermeable Waterproof Asphalt Concrete Compositions Comprising Epoxy Resin and Constructing Methods Using Thereof | |
| Sun et al. | Study on preparation of inorganic binder stabilized material with large dosage of phosphogypsum | |
| CN109704651B (en) | Asphalt mixture and preparation method thereof | |
| RU2351703C1 (en) | Method for production of cold organic mineral mixture for road pavements | |
| CN108484072B (en) | In-situ cold recycled mixture and grading method and application thereof | |
| CN114276049B (en) | Environment-friendly asphalt-cement composite material, preparation method and construction process | |
| KR101640203B1 (en) | Recycled cold asphalt concrete composition with emulsion additives and the construction method therewith | |
| KR102207013B1 (en) | Water-Impermeable Waterproof Asphalt Concrete Compositions Comprising Crum Rubber Modifier and Constructing Methods Using Thereof | |
| TW408089B (en) | Content and production method for semi-rigid asphalt concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210730 |
|
| RJ01 | Rejection of invention patent application after publication |