CN114409338A - Anti-drying shrinkage cement stabilized macadam base material for roads - Google Patents
Anti-drying shrinkage cement stabilized macadam base material for roads Download PDFInfo
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- CN114409338A CN114409338A CN202210116031.8A CN202210116031A CN114409338A CN 114409338 A CN114409338 A CN 114409338A CN 202210116031 A CN202210116031 A CN 202210116031A CN 114409338 A CN114409338 A CN 114409338A
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- 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
- C04B28/04—Portland cements
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- 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
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- 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
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
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- 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
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- 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
- C04B28/08—Slag cements
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- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- 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
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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
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- 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
- C04B2111/40—Porous or lightweight materials
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- 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
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a dry shrinkage resistant cement stabilized macadam base material for roads, which is characterized by comprising the following components in parts by weight: cement, fly ash, calcium sulphoaluminate, a water reducing agent, a cross-linking agent, a powder defoaming agent and plant fiber foam. According to the technical scheme, the plant fibers are added, so that the plant fibers are reused, energy is saved, the performance of the cement-based material can be improved, the interface cohesiveness between the fibers and the cement matrix is improved by treating the plant fibers with the surface modifier, the plant fibers are bonded together, the possibility of interface fracture is reduced, and the crack resistance of the cement-based material is improved. The plant fiber plays a role in cracking resistance, so that the invention can better resist shrinkage cracking in the initial stage and dynamic cracking in the later stage of construction. The powder defoaming agent can reduce the pores generated by bubbles in the coating, and the water reducing agent can reduce the using amount of stirring water, so that the pores generated by water volatilization in the water-reducing film-forming process are reduced, and the density of the coating is improved.
Description
Technical Field
The invention relates to the field of road engineering materials, in particular to a dry shrinkage resistant cement stabilized macadam base material for a road.
Background
With the development of national economy and the progress of science and technology, the construction of large-scale projects such as super-large-scale underground projects, expressway networks, large dams, large-span bridges and the like makes the working environment of cement structures increasingly complex and harsh. Higher demands are made on the strength, dry shrinkage resistance, dispersion resistance and durability of cement. The cement has an incompact structure and a plurality of capillary channels, and when corrosive substances invade the cement, the cement and the components of the cement are subjected to physical and chemical changes, so that the durability of the cement material is reduced, and the concrete facilities are corroded and damaged. According to statistics of relevant departments, the annual loss of cement corrosion in China reaches more than 5000 billion yuan. The cement-based grouting material is the most commonly used non-chemical grouting slurry in underground engineering, but has extremely poor dispersion resistance, is extremely easy to be washed and diluted to be lost when being washed by running water in a high-pressure water-rich stratum, has large post-drying shrinkage property and is easy to crack, and cannot fulfill the aim of filling and reinforcing the stratum for a long time. The harm and the increasingly aggravated situation are far beyond the expectations, and the research on the anti-shrinkage property, the durability and the anti-dispersion property of concrete is more and more focused by the academic circles in view of engineering safety and economic factors. The substrate material will be increasingly depleted of moisture through evaporation and internal hydration upon mixing and compaction. A series of actions due to the reduction of moisture cause the volume of the base layer to change, thereby causing a drying shrinkage crack. On one hand, the cement hydration of the semi-rigid base layer mixture at the early hardening stage releases a large amount of heat to increase the internal temperature of the base layer and expand the volume; on the other hand, the outside air temperature of the base layer is sharply reduced, so that the base layer is cooled and shrunk; at the moment, the base layer expands and contracts mutually, and larger self-stress is generated. Once the self-stress of the substrate exceeds the ultimate tensile strength of the substrate itself, the substrate will develop thermal shrinkage cracks.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a cement-stabilized macadam base material for roads, which is resistant to drying shrinkage.
The invention is realized by the following technical scheme: the cement stabilized macadam base material with the drying shrinkage resistance for the roads is characterized by comprising the following components in parts by weight: 40-60 parts of cement, 8-12 parts of fly ash, 2-4 parts of calcium sulphoaluminate, 1-1.5 parts of water reducing agent, 0.3-0.5 part of cross-linking agent, 1-3 parts of powder defoaming agent and 10-20 parts of plant fiber foam.
Preferably, the cement is one or more of portland cement, sulphoaluminate cement and slag cement.
As a preferred scheme, the calcium sulphoaluminate is generated by the reaction of calcium oxide, aluminum oxide and calcium sulfate at the temperature of 1000-1250 ℃.
As a preferred scheme, the water reducing agent is any one or more of a polycarboxylic acid water reducing agent, an aliphatic water reducing agent and an amino water reducing agent.
Preferably, the crosslinking agent is one or more of N, N' -methylene bisacrylamide, divinylbenzene, diisocyanate and ethylene glycol diacrylate.
Preferably, the powder defoaming agent is formed by polymerizing siloxane, an emulsifier and a polyether defoaming agent.
Further, the siloxane is one or more of sodium silicate, ethyl orthosilicate, methyl orthosilicate, tetrahydroxyethyl silane and silica sol.
Preferably, the plant fiber foam comprises 50 parts of plant fiber, 7 parts of anionic surfactant and 20 parts of foam stabilizer, and is prepared by a mechanical stirring foaming method.
Further, the plant fiber is straw, wheat straw or corn stalk.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: the working performance of the base material can be improved by adding the fly ash, the drying shrinkage deformation of the base material is reduced, the later strength development of the base material is improved, and the cost is reduced by partially replacing cement; the plant fiber is treated by the surface modifier, so that the interface cohesiveness between the fiber and the cement matrix is improved, the fiber and the cement matrix are bonded together, the possibility of interface fracture is reduced, and the crack resistance of the fiber is enhanced. The plant fiber plays a role in cracking resistance, so that the invention can better resist shrinkage cracking in the initial stage and dynamic cracking in the later stage of construction. The powder defoaming agent can reduce the pores generated by bubbles in the coating, and the water reducing agent can reduce the using amount of stirring water, so that the pores generated by water volatilization in the water-reducing film-forming process are reduced, and the density of the coating is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 40 parts of portland cement, 10 parts of fly ash, 2 parts of calcium sulphoaluminate, 1 part of polycarboxylic acid water reducing agent, 0.3 part of N, N' -methylene bisacrylamide, 2 parts of powder defoaming agent and 10 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 2
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 50 parts of Portland cement, 10 parts of fly ash, 2 parts of calcium sulphoaluminate, 1.5 parts of polycarboxylic acid water reducing agent, 0.3 part of N, N' -methylene bisacrylamide, 2 parts of powder defoaming agent and 20 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 3
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 60 parts of portland cement, 12 parts of fly ash, 3 parts of calcium sulphoaluminate, 1.5 parts of polycarboxylic acid water reducing agent, 0.35 part of N, N' -methylene bisacrylamide, 3 parts of powder defoaming agent and 20 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 4
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 45 parts of sulphoaluminate cement, 11 parts of fly ash, 4 parts of calcium sulphoaluminate, 1.5 parts of amino water reducing agent, 0.35 part of divinylbenzene, 2 parts of powder defoaming agent and 15 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 5
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 50 parts of sulphoaluminate cement, 10 parts of fly ash, 3.5 parts of calcium sulphoaluminate, 1.5 parts of amino water reducing agent, 0.35 part of divinyl benzene, 2 parts of powder defoaming agent and 17 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 6
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 40 parts of slag cement, 12 parts of fly ash, 4 parts of calcium sulphoaluminate, 1 part of aliphatic water reducing agent, 0.4 part of diisocyanate, 2 parts of powder defoaming agent and 15 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Example 7
A cement stabilized macadam base material for road, which is resistant to drying shrinkage, comprises the following components in parts by weight: 50 parts of slag cement, 12 parts of fly ash, 4 parts of calcium sulphoaluminate, 1.5 parts of aliphatic water reducing agent, 0.5 part of diisocyanate, 2 parts of powder defoaming agent and 20 parts of plant fiber foam.
A method for preparing a cement stabilized macadam base material for roads, which is resistant to drying shrinkage, characterized by comprising the following steps:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
Comparative example 1 compared to example 1, no plant fiber foam was added;
comparative example 2 compared to example 1, no powder defoamer was added;
comparative example 3 compared to example 1, no crosslinker was added;
comparative example 4 compared to example 1, no calcium sulphoaluminate was added.
The samples of examples 1-7 and comparative examples 1-4 were tested for overall dry shrinkage coefficient performance according to road engineering inorganic binder stabilized material test protocol JTG E51-2009.
The test results are shown in table 1:
TABLE 1
| Sample (I) | Total drying shrinkage factor 10-6/% |
| Example 1 | 43 |
| Example 2 | 39 |
| Example 3 | 38 |
| Example 4 | 45 |
| Example 5 | 44 |
| Example 6 | 43 |
| Example 7 | 41 |
| Comparative example 1 | 61 |
| Comparative example 2 | 75 |
| Comparative example 3 | 83 |
| Comparative example 4 | 66 |
According to the embodiment and the performance test, the anti-dry shrinkage cement stabilized macadam base material for the road provided by the invention has higher dry shrinkage deformation resistance and good working performance, and the service life of the road is effectively prolonged. Therefore, the addition of the fly ash can increase the working performance of the base material, reduce the drying shrinkage deformation of the base material, improve the later strength development of the base material, partially replace cement and reduce the cost; the plant fiber is treated by the surface modifier, so that the interface cohesiveness between the fiber and the cement matrix is improved, the fiber and the cement matrix are bonded together, the possibility of interface fracture is reduced, and the crack resistance of the fiber is enhanced. The plant fiber plays a role in cracking resistance, so that the invention can better resist shrinkage cracking in the initial stage and dynamic cracking in the later stage of construction. The powder defoaming agent can reduce the pores generated by bubbles in the coating, and the water reducing agent can reduce the using amount of stirring water, so that the pores generated by water volatilization in the water-reducing film-forming process are reduced, and the density of the coating is improved.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The cement stabilized macadam base material with the drying shrinkage resistance for the roads is characterized by comprising the following components in parts by weight: 40-60 parts of cement, 8-12 parts of fly ash, 2-4 parts of calcium sulphoaluminate, 1-1.5 parts of water reducing agent, 0.3-0.5 part of cross-linking agent, 1-3 parts of powder defoaming agent and 10-20 parts of plant fiber foam.
2. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 1, wherein the cement is one or more of portland cement, sulphoaluminate cement and slag cement.
3. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 1, wherein the calcium sulphoaluminate is generated by the reaction of calcium oxide, aluminium oxide and calcium sulphate at 1000-1250 ℃.
4. The cement stabilized macadam base material for roads resistant to drying shrinkage as recited in claim 1, wherein the water reducing agent is any one or more of a polycarboxylic acid water reducing agent, an aliphatic water reducing agent and an amino water reducing agent.
5. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 1, wherein the cross-linking agent is any one or more of N, N' -methylenebisacrylamide, divinylbenzene, diisocyanate and ethylene glycol diacrylate.
6. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 1, wherein said powder defoamer is polymerized from siloxane, emulsifier, polyether defoamer.
7. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 2, wherein said siloxane is one or more of sodium silicate, ethyl orthosilicate, methyl orthosilicate, tetrahydroxyethylsilane and silica sol.
8. The anti-drying shrinkage cement stabilized macadam base material for the road as claimed in claim 1, wherein the plant fiber foam comprises 50 parts of plant fiber, 7 parts of anionic surfactant and 20 parts of foam stabilizer, and is prepared by a mechanical stirring foaming method to obtain the plant fiber foam material.
9. The cement stabilized macadam base material for roads resistant to drying shrinkage as claimed in claim 1, wherein said plant fiber is straw, wheat straw or corn stalk.
10. A method of making a road use desiccation resistant cement stabilized macadam base material as claimed in any one of claims 1 to 9, said method of making comprising:
s1: uniformly mixing the cement, the fly ash and the calcium sulphoaluminate which are accurately weighed;
s2: adding a cross-linking agent and plant fiber foam into the uniformly mixed mixture obtained in the step S1, and uniformly mixing;
s3: and (3) dissolving a water reducing agent into water, pouring the water reducing agent into the mixture S2, uniformly mixing, and carrying out material sealing to obtain the cement-stabilized fully-recycled brick-concrete aggregate pavement base material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116031.8A CN114409338A (en) | 2022-02-07 | 2022-02-07 | Anti-drying shrinkage cement stabilized macadam base material for roads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116031.8A CN114409338A (en) | 2022-02-07 | 2022-02-07 | Anti-drying shrinkage cement stabilized macadam base material for roads |
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| CN114409338A true CN114409338A (en) | 2022-04-29 |
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| CN202210116031.8A Pending CN114409338A (en) | 2022-02-07 | 2022-02-07 | Anti-drying shrinkage cement stabilized macadam base material for roads |
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| CN103772749A (en) * | 2013-12-25 | 2014-05-07 | 湖北工业大学 | Plant fiber porous composite material |
| US20150152011A1 (en) * | 2013-11-29 | 2015-06-04 | Nano And Advanced Materials Institute Limited | Hydrophobic low shrinkage lightweight cementitious matrix |
| CN110330286A (en) * | 2019-05-24 | 2019-10-15 | 河北晨阳工贸集团有限公司 | A kind of single polymer cement waterproofing mortar and preparation method thereof |
| CN110342859A (en) * | 2019-03-12 | 2019-10-18 | 北京市政建设集团有限责任公司 | A kind of silicon hybridization acrylates cement composite grouting material and preparation method thereof |
| CN110981329A (en) * | 2019-11-13 | 2020-04-10 | 杭州钱江新城市政园林建设有限公司 | Fiber-reinforced cement fly ash stabilized fully-recycled brick-concrete aggregate pavement base material and preparation method thereof |
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| US20150152011A1 (en) * | 2013-11-29 | 2015-06-04 | Nano And Advanced Materials Institute Limited | Hydrophobic low shrinkage lightweight cementitious matrix |
| CN103772749A (en) * | 2013-12-25 | 2014-05-07 | 湖北工业大学 | Plant fiber porous composite material |
| CN110342859A (en) * | 2019-03-12 | 2019-10-18 | 北京市政建设集团有限责任公司 | A kind of silicon hybridization acrylates cement composite grouting material and preparation method thereof |
| CN110330286A (en) * | 2019-05-24 | 2019-10-15 | 河北晨阳工贸集团有限公司 | A kind of single polymer cement waterproofing mortar and preparation method thereof |
| CN110981329A (en) * | 2019-11-13 | 2020-04-10 | 杭州钱江新城市政园林建设有限公司 | Fiber-reinforced cement fly ash stabilized fully-recycled brick-concrete aggregate pavement base material and preparation method thereof |
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