CN112876177A - Desert sand epoxy resin composite mortar and preparation method thereof - Google Patents
Desert sand epoxy resin composite mortar and preparation method thereof Download PDFInfo
- Publication number
- CN112876177A CN112876177A CN202110374073.7A CN202110374073A CN112876177A CN 112876177 A CN112876177 A CN 112876177A CN 202110374073 A CN202110374073 A CN 202110374073A CN 112876177 A CN112876177 A CN 112876177A
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- Prior art keywords
- sand
- epoxy resin
- desert
- composite mortar
- cement
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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
-
- 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
Abstract
The invention discloses an epoxy resin composite mortar for desert sand and a preparation method thereof, wherein the main components comprise cement, sand, epoxy resin, a curing agent, a diluent and water; the mass ratio of the cement, the sand, the epoxy resin, the curing agent, the diluent and the water is (0.5-1.1): 2.5-3.2): 1-1.6): 0.4-0.7): 0.02-0.04): 0.3-0.7; the mortar comprises engineering sand and desert sand, wherein the mass ratio of the engineering sand to the desert sand is (70-85): (15-30); the invention can greatly reduce the usage amount of river sand and mountain sand, reduce the environmental pressure, fully utilize desert resources and relieve the supply and demand contradiction of sandstone materials in the building industry; the invention can meet the performance of the building mortar, has good workability, can be widely used for construction of building engineering, and has good social benefit and economic benefit.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to desert sand epoxy resin composite mortar and a preparation method thereof.
Background
At present, the mortar generally adopts river sand or mountain sand as the main component, the strength is generally M2.5-M30, and the mortar is widely used for various building mortars due to excellent performance.
However, as the construction industry develops, the excavation speed of river sand and mountain sand exceeds the natural recovery speed, and certain damage is caused to the environment, so that the contradiction between the increasing demand and the ecological environment is highlighted.
Desert sand is rich in resources, but the compressive strength is low due to the defects of too fine fineness, poor plasticity, high clay content and the like, and the desert sand cannot meet the performance standard of building mortar, so that the utilization rate of the desert sand is low. Compared with the common mortar, the mortar based on the desert sand researched at present has low strength and can not meet the construction requirements basically.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the desert sand epoxy resin composite mortar and the preparation method thereof, which can obviously improve the strength of the desert sand mortar, meet the standard requirements of building mortar, fully utilize desert resources, relieve environmental pressure, have low construction cost and have higher practical application value.
In order to achieve the purpose, the invention adopts the following technical scheme:
an epoxy resin composite mortar for desert sand comprises cement, sand, epoxy resin, a curing agent, a diluent and water; the mass ratio of the cement, the sand, the epoxy resin, the curing agent, the diluent and the water is (0.5-1.1): 2.5-3.2): 1-1.6): 0.4-0.7): 0.02-0.04): 0.3-0.7.
Preferably, the cement is P.O42.5 ordinary portland cement.
Preferably, the sand comprises engineering sand and desert sand, and the mass ratio of the engineering sand to the desert sand is (70-85): (15-30).
Preferably, the average particle size of the desert sand is 0.17-0.20 mm, and the fineness modulus is 0.20-0.23.
Preferably, the engineering sand is medium sand, the fineness modulus is 2.5-3, and the bulk density is 1450-1500 kg/m3。
Preferably, the epoxy resin is E44 or E51 type bisphenol A epoxy resin.
Preferably, the curing agent is polyether amine, and the diluent is C12-14 glyceryl ether.
Preferably, the epoxy value of the diluent is 0.25 to 0.3eq/100g, and the viscosity at 25 ℃ is 45 to 52 MPa.s.
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing cement, sand, epoxy resin, curing agent, diluent and water in a mass ratio of (0.5-1.1): 2.5-3.2): 1-1.6): 0.4-0.7): 0.02-0.04): 0.3-0.7 for later use;
2) mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for not less than 5 minutes, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, and adding the water for stirring for not less than 10 minutes.
Preferably, the mixing temperature of the epoxy resin and the curing agent thereof is 40-60 ℃.
The invention has the beneficial effects that:
the invention adopts the desert sand to replace the original engineering sand for construction, can greatly reduce the usage amount of river sand and mountain sand, reduce the environmental pressure, fully utilize the desert resources, reduce the construction cost and relieve the supply and demand contradiction of sandstone materials in the construction industry;
the invention has the advantages that the epoxy resin is added, the epoxy resin has stronger binding power, and the strength of the mortar can be obviously improved after the epoxy resin is mixed with materials such as cement, the application proves through experiments that the compressive strength of a test block 28d prepared by adopting the composite mortar is 51.9-55.8 MPa, the strength is improved by 18.6-22.5 MPa compared with the common commercial equivalent-grade mortar, the slump is 50-90 mm, the strength and the working performance of the composite mortar meet the standard requirements of the building mortar under the condition of selecting desert sand as the composite mortar, and the composite mortar can be widely used for construction of building engineering.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing the following raw materials: 50kg of P.O42.5 ordinary Portland cement, 250kg of sand, 120kg of E44 bisphenol A type liquid epoxy resin, 40kg of polyetheramine, 2kg of C12-14 glyceryl ether (AGE) and 30kg of water;
the mass ratio of the engineering sand to the desert sand in the sand is 70: 30, of a nitrogen-containing gas;
the desert sand is MaoUsu desert sand, the average grain diameter is 0.17mm, and the fineness modulus is 0.20; the engineering sand adopts standard sand which is medium sand, the fineness modulus is 2.9, and the bulk density is 1490kg/m3；
2) Mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for 5 minutes at 40 ℃, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, adding the water and stirring for 10 minutes.
Example 2
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing the following raw materials: 100kg of P.O42.5 ordinary Portland cement, 300kg of sand, 150kg of E44 bisphenol A epoxy resin, 50kg of polyetheramine, 3kg of C12-14 glyceryl ether (AGE) and 50kg of water;
the mass ratio of the engineering sand to the desert sand in the sand is 80: 20;
the desert sand is MaoUsu desert sand, the average grain diameter is 0.18mm, and the fineness modulus is 0.23; the engineering sand adopts standard sand which is medium sand, the fineness modulus is 3, and the bulk density is 1500kg/m3；
2) Mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for 6 minutes at 45 ℃, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, adding the water and stirring for 11 minutes.
Example 3
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing the following raw materials: 58kg of ordinary Portland cement, 260kg of sand, 120kg of E44 bisphenol A epoxy resin, 50kg of polyetheramine, 3kg of C12-14 glycerol ether (AGE) and 40kg of water;
the mass ratio of the engineering sand to the desert sand in the sand is 75: 25;
the desert sand is MaoUsu desert sand, the average grain diameter is 0.19mm, and the fineness modulus is 0.22; the engineering sand adopts standard sand which is medium sand, the fineness modulus is 2.9, and the bulk density is 1490kg/m3；
2) Mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for 7 minutes at 50 ℃, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, adding the water and stirring for 12 minutes.
Example 4
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
(1) weighing the following raw materials: 95kg of P.O42.5 ordinary portland cement, 310kg of sand, 108kg of E44 bisphenol A epoxy resin, 60kg of polyetheramine, 2kg of C12-14 glyceryl ether (AGE) and 50kg of water;
the mass ratio of the engineering sand to the desert sand in the sand is 85: 15;
the desert sand is MaoUsu desert sand, the average grain diameter is 0.18mm, and the fineness modulus is 0.21; the engineering sand adopts standard sand which is medium sand, the fineness modulus is 2.7, and the bulk density is 1474kg/m3；
2) Mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for 8 minutes at 55 ℃, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, adding the water and stirring for 14 minutes.
Example 5
A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing the following raw materials: 110kg of ordinary Portland cement, 320kg of sand, 160kg of E44 bisphenol A epoxy resin, 70kg of polyether amine, 4kg of C12-14 glycerol ether (AGE) and 70kg of water;
the mass ratio of the engineering sand to the desert sand in the sand is 80: 20;
the desert sand is MaoUsu desert sand, the average grain diameter is 0.2mm, and the fineness modulus is 0.21; the engineering sand adopts standard sand which is medium sand, the fineness modulus is 2.5, and the bulk density is 1450kg/m3；
2) Mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for 9 minutes at 60 ℃, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, adding the water and stirring for 15 minutes.
Examples of the experiments
The test block is made of the desert sand epoxy resin composite mortar, the size is 70.7mm multiplied by 70.7mm, the mold is removed after 1d, the sand is maintained for 7d and 28d respectively, and then the compressive strength test is carried out according to JGJT70-2009 building mortar basic performance test method standard. The results are shown in Table 4.
TABLE 1 test results
As can be seen from Table 1, the composite mortar 28d of the invention has higher compressive strength than the common commercial equivalent mortar 28d, can meet the performance requirements of the building mortar, has good workability, and can be widely used for construction of building engineering.
Claims (10)
1. An epoxy resin composite mortar for desert sand comprises cement, sand, epoxy resin, a curing agent, a diluent and water; the method is characterized in that: the mass ratio of the cement, the sand, the epoxy resin, the curing agent, the diluent and the water is (0.5-1.1): 2.5-3.2): 1-1.6): 0.4-0.7): 0.02-0.04): 0.3-0.7.
2. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the cement is P.O42.5 ordinary portland cement.
3. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the sand comprises engineering sand and desert sand, and the mass ratio of the engineering sand to the desert sand is (70-85): (15-30).
4. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the average particle size of the desert sand is 0.17-0.20 mm, and the fineness modulus is 0.20-0.23.
5. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the engineering sand adopts standard sand which is medium sand, the fineness modulus is 2.5-3, and the bulk density is 1450-1500 kg/m3。
6. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the epoxy resin is E44 or E51 type bisphenol A epoxy resin.
7. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the curing agent is selected from polyether amine, and the diluent is selected from C12-14 glyceryl ether.
8. The desert sand epoxy resin composite mortar of claim 1, which is characterized in that: the epoxy value of the diluent is 0.25 to 0.3eq/100g, and the viscosity at 25 ℃ is 45 to 52 MPa.s.
9. A preparation method of desert sand epoxy resin composite mortar specifically comprises the following steps:
1) weighing cement, sand, epoxy resin, curing agent, diluent and water in a mass ratio of (0.5-1.1): 2.5-3.2): 1-1.6): 0.4-0.7): 0.02-0.04): 0.3-0.7 for later use;
2) mixing and stirring the cement and the sand obtained in the step 1) uniformly for later use, stirring the epoxy resin, the curing agent and the diluent together for not less than 5 minutes, pouring the mixture into the cement and the sand which are mixed uniformly, adding the weighed water while stirring, mixing and stirring uniformly, and adding the water for stirring for not less than 10 minutes.
10. The preparation method of the epoxy resin composite mortar for desert sand as claimed in claim 9, which is characterized in that: the mixing temperature of the epoxy resin and the curing agent thereof is 40-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110374073.7A CN112876177A (en) | 2021-04-07 | 2021-04-07 | Desert sand epoxy resin composite mortar and preparation method thereof |
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| CN202110374073.7A CN112876177A (en) | 2021-04-07 | 2021-04-07 | Desert sand epoxy resin composite mortar and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199023A (en) * | 2011-04-06 | 2011-09-28 | 西安长庆科技工程有限责任公司 | Building mortar prepared by using desert Aeolian sand and preparation method thereof |
| CN110204273A (en) * | 2019-05-17 | 2019-09-06 | 石河子大学 | A kind of Desert Sand cement-base composite material and its preparation process |
| CN110615639A (en) * | 2019-09-18 | 2019-12-27 | 河海大学 | Epoxy mortar for underwater repair and preparation method thereof |
-
2021
- 2021-04-07 CN CN202110374073.7A patent/CN112876177A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199023A (en) * | 2011-04-06 | 2011-09-28 | 西安长庆科技工程有限责任公司 | Building mortar prepared by using desert Aeolian sand and preparation method thereof |
| CN110204273A (en) * | 2019-05-17 | 2019-09-06 | 石河子大学 | A kind of Desert Sand cement-base composite material and its preparation process |
| CN110615639A (en) * | 2019-09-18 | 2019-12-27 | 河海大学 | Epoxy mortar for underwater repair and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 吕志栓: "以抗压强度为目标值的沙漠砂替代率的研究", 《四川水泥》 * |
| 谭敏: "环氧砂浆压缩强度影响因素研究", 《热固性树脂》 * |
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Application publication date: 20210601 |