CN109776058B - Dextrin mortar composite material based on waste mineral powder and preparation method thereof - Google Patents
Dextrin mortar composite material based on waste mineral powder and preparation method thereof Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 79
- 229920001353 Dextrin Polymers 0.000 title claims abstract description 76
- 239000004375 Dextrin Substances 0.000 title claims abstract description 76
- 235000019425 dextrin Nutrition 0.000 title claims abstract description 76
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 75
- 239000011707 mineral Substances 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 32
- 239000002699 waste material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 50
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 50
- 239000004571 lime Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 235000010755 mineral Nutrition 0.000 claims description 69
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 12
- 239000012190 activator Substances 0.000 claims description 11
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 239000002440 industrial waste Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000033558 biomineral tissue development Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 210000004911 serous fluid Anatomy 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011430 sticky rice mortar Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
Abstract
The invention discloses a dextrin mortar composite material based on waste mineral powder, which comprises the following raw material components, by mass, 20-32% of lime, 4.2-14.2% of dextrin slurry, 10.4-16.7% of mineral powder, 1.0-1.7% of an excitant, 7.5-10.8% of water and 20.9-56.9% of sand; the invention also discloses a preparation method of the composite material, which comprises the following steps of firstly weighing the following raw materials in percentage by mass: 20 to 32 percent of lime, 4.2 to 14.2 percent of dextrin slurry, 10.4 to 16.7 percent of mineral powder, 1.0 to 1.7 percent of excitant, 7.5 to 10.8 percent of water and 20.9 to 56.9 percent of sand; and then preparing a gelled material A and a gelled material B respectively, mixing the gelled material A and the gelled material B, and adding sand until the mixture is uniformly stirred to obtain the dextrin mortar composite material based on the waste mineral powder. The preparation method is simple and easy to implement; the prepared composite material has high strength, effectively utilizes waste mineral powder, saves resources and is beneficial to green development.
Description
Technical Field
The invention belongs to the technical field of building materials, relates to a dextrin mortar composite material based on waste mineral powder, and also relates to a preparation method of the composite material.
Background
The superfine mineral powder has potential activity and is mainly used as admixture of concrete minerals. At present, many researches adopt superfine mineral powder to partially or completely replace cement. In recent ten years, along with the rapid development of the ore powder industry, the production quantity of the ore powder is huge, but the utilization rate of the ore powder is low, and the utilization range is narrow.
Adding glutinous rice juice into lime, loess and sand to form conventional glutinous rice mortar. Researches find that the glutinous rice in the traditional glutinous rice mortar has the characteristic of an organic template in biomineralization, can change the microstructure of calcium carbonate crystals when the lime slurry is solidified, and enhances the gelling effect of the lime slurry. Lime acts as an air-setting cementitious material, maintaining and developing its strength in air. However, the prior research only aims at the sticky rice mortar or only aims at the lime, the gelation effect is singly applied, and the resource is wasted. Therefore, it is very important to effectively apply the industrial waste mineral powder to the glutinous rice mortar and lime.
Disclosure of Invention
The invention aims to provide a dextrin mortar composite material based on waste mineral powder, which has the characteristics of improving the utilization rate of industrial waste mineral powder and the strength of lime inorganic/organic materials.
Another object of the present invention is to provide a method for preparing the above composite material.
The invention adopts the technical scheme that the dextrin mortar composite material based on waste mineral powder comprises, by mass, 20-32% of lime, 4.2-14.2% of dextrin slurry, 10.4-16.7% of mineral powder, 1.0-1.7% of an activator, 7.5-10.8% of water and 20.9-83.5% of sand.
The invention is also characterized in that:
the excitant is the combination of sodium silicate and sodium hydroxide according to any ratio, and the mass of the excitant is 5 to 11 percent of that of the mineral powder.
The sand is natural sand or artificial sand.
The lime is hydrated lime, slaked lime or ash calcium powder.
The dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3 to 11.5.
The other technical scheme adopted by the invention is that the preparation method of the composite material is implemented according to the following steps:
step 1, weighing the following raw materials in parts by mass:
20 to 32 percent of lime, 4.2 to 14.2 percent of dextrin slurry, 10.4 to 16.7 percent of mineral powder, 1.0 to 1.7 percent of excitant, 7.5 to 10.8 percent of water and 20.9 to 56.9 percent of sand;
step 2, preparing a cementing material A: pouring an excitant and mineral powder into the container A, adding water, uniformly stirring, and standing for 1-3 minutes to obtain a cementing material A;
step 3, preparing a cementing material B: pouring the dextrin slurry and lime into a container B, stirring, and standing for 1-5 minutes to obtain a cementing material B;
and 4, mixing the cementing material A and the cementing material B, adding sand, and uniformly stirring to obtain the dextrin mortar composite material based on the waste mineral powder.
The other technical scheme of the invention is also characterized in that:
the exciting agent is the combination of sodium silicate and sodium hydroxide according to any ratio, the mass of the exciting agent is 5-11% of the mass of the mineral powder, and the mass of the mineral powder is 33.3-68.9% of the mass of the lime.
The cement A is a hydraulic cement.
The dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3-11.5, and the cementing material B is an air-hardening cementing material.
The invention has the beneficial effects that:
the dextrin mortar composite material based on the waste mineral powder utilizes the excitant to excite the potential hydraulic activity of the mineral powder, provides a cementing system for the composite material, effectively utilizes industrial waste, and saves the production cost; lime in the dextrin mortar composite material based on waste mineral powder is a cementing system and can also be used as an excitant of the mineral powder; the dextrin mortar composite material based on the waste mineral powder adopts dextrin slurry to easily gelatinize, meets the regulation and control effect on inorganic materials and improves the strength of the composite material; the preparation method of the composite material of the waste-utilizing dextrin mortar is simple and easy to implement, and can achieve better strength and waterproof performance.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The dextrin mortar composite material based on waste mineral powder comprises, by mass, 20-32% of lime, 4.2-14.2% of dextrin slurry, 10.4-16.7% of mineral powder, 1.0-1.7% of an activator, 7.5-10.8% of water and 20.9-56.9% of sand.
Wherein the excitant is the combination of sodium silicate and sodium hydroxide according to any ratio, and the mass of the excitant is 5 to 11 percent of that of the mineral powder; the sand is natural sand or artificial sand, and the particle size of the sand is 0.25-4.75 mm; the lime is hydrated lime, slaked lime or lime calcium powder, and the mass fraction of calcium hydroxide in the lime is not less than 85%; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3 to 11.5.
Lime: the lime slurry is an inorganic gelled material and is one of main minerals in biomineralization, the main effect is that calcium hydroxide in the lime slurry absorbs carbon dioxide from air, and generates relatively stable calcium carbonate crystals under the regulation and control of organic matters, and in addition, lime also plays a role in exciting the hydration of mineral powder.
Sand: the main function is to form the framework of the high-strength dextrin mortar composite material, and the high-strength dextrin mortar composite material has an important effect on the volume stability of the composite material.
Dextrin slurry: mainly aims to play a template role in the mineralization process, namely the regulation and control effect on the carbonation reaction of lime and the synergistic effect on calcium carbonate crystals generated by the lime.
Exciting agent: the main effects are that the dissociation of vitreous body in mineral powder is accelerated, the formation of hydrated calcium silicate is promoted, and the structure of hydrated product is continuously strengthened; the excitant can excite the potential hydraulic activity of the mineral powder, and then the mineral powder and air-hardening gelled material lime are coagulated and hardened under the regulation and control of dextrin serous fluid to generate the composite material.
The preparation method of the dextrin mortar composite material based on the waste mineral powder is implemented according to the following steps:
step 1, weighing the following raw materials in parts by mass:
20 to 32 percent of lime, 4.2 to 14.2 percent of dextrin slurry, 10.4 to 16.7 percent of mineral powder, 1.0 to 1.7 percent of excitant, 7.5 to 10.8 percent of water and 20.9 to 56.9 percent of sand;
wherein the excitant is the combination of sodium silicate and sodium hydroxide according to any ratio, and the mass of the excitant is 5 to 11 percent of that of the mineral powder; the mineral powder accounts for 33.3 to 68.9 percent of the mass of the lime;
step 2, preparing a cementing material A: pouring an excitant and mineral powder into the container A, adding water, uniformly stirring, and standing for 1-3 minutes to obtain a cementing material A, wherein the cementing material A is a hydraulic cementing material;
step 3, preparing a cementing material B: pouring the dextrin slurry and lime into a container B, stirring, and standing for 1-5 minutes to obtain a cementing material B;
wherein the dextrin serous fluid is prepared from dextrin and water in a mass ratio of 1: 5.3 to 11.5; the cementing material B is an air-setting cementing material;
and 4, mixing the cementing material A and the cementing material B, adding sand, and uniformly stirring to obtain the dextrin mortar composite material based on the waste mineral powder.
Example 1:
the embodiment provides a preparation method of a dextrin mortar composite material based on waste mineral powder, which is implemented by the following steps:
step 1, weighing the following raw materials in parts by mass:
20.1% of lime, 10.7% of dextrin slurry, 12.6% of mineral powder, 1.2% of an excitant, 8.2% of water and 47.2% of sand;
wherein the excitant is composed of sodium hydroxide and sodium silicate in a mass ratio of 1:2, the excitant accounts for 10% of the mass of the mineral powder, and the mineral powder accounts for 62.5% of the mass of the lime; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3;
step 2, preparing a cementing material A: pouring an excitant and mineral powder into the container A, adding water, uniformly stirring, and standing for 1 minute to obtain a cementing material A;
step 3, preparing a cementing material B: pouring the dextrin slurry and lime into a container B, stirring, and standing for 1 minute to obtain a gel material B;
and 4, mixing the cementing material A and the cementing material B, adding sand, and uniformly stirring to obtain the dextrin mortar composite material based on the waste mineral powder.
Example 2:
this example provides a process for preparing a dextrin mortar composite material based on waste mineral powder, which is the same as example 1 except that:
the raw materials weighed are 20 percent of lime, 4.2 percent of dextrin slurry, 13.4 percent of mineral powder, 1.0 percent of excitant, 7.0 percent of water and 54.4 percent of sand;
wherein the mass of the excitant is 8 percent of that of the mineral powder; the mineral powder accounts for 68.9 percent of the mass of the lime; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 11.5;
preparing a cementing material A in the step 2, and standing for 2.5 minutes; and 3, preparing a cementing material B in the step 3, and standing for 3.5 minutes.
Example 3:
this example provides a process for preparing a dextrin mortar composite material based on waste mineral powder, which is the same as example 1 except that:
the raw materials weighed are 31.6 percent of lime, 4.2 percent of dextrin slurry, 10.5 percent of mineral powder, 1.1 percent of excitant, 10.5 percent of water and 42.1 percent of sand;
wherein the mineral powder accounts for 33.3 percent of the mass of the lime; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3;
preparing a cementing material A in the step 2, and standing for 2 minutes; and (3) preparing a cementing material B in the step 3, and standing for 2 minutes.
Example 4:
this example provides a process for preparing a dextrin mortar composite material based on waste mineral powder, which is the same as example 1 except that:
the raw materials weighed are 27.1 percent of lime, 5.8 percent of dextrin slurry, 14.6 percent of mineral powder, 1.5 percent of excitant, 9.2 percent of water and 41.8 percent of sand;
wherein the mineral powder accounts for 53.8 percent of the mass of the lime; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3;
preparing a cementing material A in the step 2, and standing for 2 minutes; and (3) preparing a cementing material B in the step 3, and standing for 3 minutes.
Example 5:
this example provides a process for preparing a dextrin mortar composite material based on waste mineral powder, which is the same as example 1 except that:
the raw materials weighed are 32% of lime, 14.2% of dextrin slurry, 16.7% of mineral powder, 1.7% of excitant, 10.8% of water and 24.6% of sand;
wherein the mineral powder accounts for 50.7 percent of the mass of the lime; the mass of the excitant is 11 percent of that of the mineral powder; the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 7.3;
preparing a cementing material A in the step 2, and standing for 3 minutes; and (3) preparing a cementing material B in the step 3, and standing for 5 minutes.
Comparative example 1:
the following raw materials are respectively weighed: 16.5% of lime, 5.5% of mineral powder, 12.1% of water and 65.9% of sand; the raw materials are mixed and stirred to prepare the composite material.
Comparative example 2:
the following raw materials are respectively weighed: 16.3 percent of lime, 7.4 percent of dextrin slurry, 5.4 percent of mineral powder, 5.6 percent of water and 65.3 percent of sand; the raw materials are mixed and stirred to prepare the composite material.
Comparative example 3:
the following raw materials are respectively weighed: 16.2 percent of lime, 7.3 percent of dextrin slurry, 5.4 percent of mineral powder, 0.5 percent of excitant, 64.9 percent of sand and 5.7 percent of water; the raw materials are mixed and stirred to prepare the composite material.
Comparative example 1 has no dextrin syrup and no trigger, and the other components are the same as in example 1.
Comparative example 2 has no activator, and the other components are the same as in example 1.
In comparative example 3 the activator sodium hydroxide and sodium silicate were mixed in a 1:1 ratio and the other components were the same as in example 1.
Since there is no standard for polymer cement, the composite materials of the waste-utilized dextrin mortar prepared in examples 1 to 5 and the composite materials prepared in comparative examples 1 to 3 were prepared into 40mm × 40mm × 160mm test pieces in accordance with GBT17671-1999 "Cement mortar Strength test method" (ISO), and the flexural and compressive strengths were measured in NYL-300 type compression testing machine (accuracy class 1) and DKZ-5000 type electric flexural testing machine. Test blocks corresponding to different examples and comparative examples were all soaked in water, and the time for the test blocks to start peeling off was observed to perform a water soaking resistance test. The test results of examples 1 to 5 are shown in table 1, and the test results of comparative examples 1 to 3 are shown in table 2.
Table 1, summary of the Properties of the composites prepared in examples 1 to 5
Table 2 summary of the Properties of the composites prepared in comparative examples 1 to 3
From the experimental results shown in tables 1-2, the method of the present invention utilizes the activator to excite the latent hydraulic activity of the industrial waste mineral powder, and then the activator and the air-hardening gelling system lime are used for regulating and controlling the dextrin slurry to prepare the composite material with high strength and water soaking resistance. It was found by comparative examples 1 and 2 that the performance of the composite was improved by the addition of an activator and a dextrin slurry. As lime can be used as a cementing material and also can play a role of an activator, the ratio of the compound activator sodium hydroxide to the sodium silicate is not easy to be too high, and the effect of 1:2 is found to be better through a comparative example 3.
From the experimental results in tables 1 to 2, it can be further found that the composite material of the waste-utilizing dextrin mortar prepared in example 4 has high compressive strength, flexural strength and water immersion resistance, the process adopted by the invention is simple and easy to implement, and the research results have good practicability.
Claims (3)
1. The dextrin mortar composite material based on waste mineral powder is characterized by comprising the following raw material components, by mass, 20-32% of lime, 4.2-14.2% of dextrin slurry, 10.4-16.7% of mineral powder, 1.0-1.7% of an activator, 7.5-10.8% of water, 20.9-56.9% of sand, and the sum of the mass percentages of the raw materials is 100%;
the exciting agent is composed of sodium silicate and sodium hydroxide in a mass ratio of 2:1, and the mass of the exciting agent is 8% -11% of that of the mineral powder;
the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3 to 11.5;
the lime is slaked lime or ash calcium powder.
2. The waste mineral powder-based dextrin mortar composite material according to claim 1, wherein the sand is natural sand or artificial sand.
3. The method for preparing dextrin mortar composite material based on waste mineral powder according to any one of claims 1-2, characterized by comprising the following steps:
step 1, weighing the following raw materials in parts by mass:
20-32% of lime, 4.2-14.2% of dextrin slurry, 10.4-16.7% of mineral powder, 1.0-1.7% of an activator, 7.5-10.8% of water and 20.9-56.9% of sand, wherein the sum of the mass percentages of the raw materials of the components is 100%;
step 2, preparing a cementing material A: pouring an excitant and mineral powder into the container A, adding water, uniformly stirring, and standing for 1-3 minutes to obtain a cementing material A;
step 3, preparing a cementing material B: pouring the dextrin slurry and lime into a container B, stirring, and standing for 1-5 minutes to obtain a cementing material B;
step 4, mixing the cementing material A and the cementing material B, adding sand and uniformly stirring to obtain the dextrin mortar composite material based on the waste mineral powder;
in the step 1, the excitant is composed of sodium silicate and sodium hydroxide according to the mass ratio of 2:1, the excitant accounts for 8-11% of the mass of mineral powder, and the mineral powder accounts for 33.3-68.9% of the mass of lime;
in the step 3, the dextrin slurry is prepared from dextrin and water in a mass ratio of 1: 5.3-11.5, wherein the cementing material B is an air-setting cementing material; the binding material A is a hydraulic binding material.
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- 2019-02-28 CN CN201910151764.3A patent/CN109776058B/en not_active Expired - Fee Related
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| CN102093021A (en) * | 2010-12-28 | 2011-06-15 | 济南高新区工业废弃物利用研发中心 | Slag micro-powder dry mixed mortar |
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| CN109776058A (en) | 2019-05-21 |
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