CN115057641A - Engineering waste soil-based regenerative functional aggregate and preparation method thereof - Google Patents
Engineering waste soil-based regenerative functional aggregate and preparation method thereof Download PDFInfo
- Publication number
- CN115057641A CN115057641A CN202210756516.3A CN202210756516A CN115057641A CN 115057641 A CN115057641 A CN 115057641A CN 202210756516 A CN202210756516 A CN 202210756516A CN 115057641 A CN115057641 A CN 115057641A
- Authority
- CN
- China
- Prior art keywords
- waste soil
- parts
- engineering
- engineering waste
- recycled
- 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
- 239000002699 waste material Substances 0.000 title claims abstract description 74
- 239000002689 soil Substances 0.000 title claims abstract description 69
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 19
- 239000011707 mineral Substances 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 17
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010457 zeolite Substances 0.000 claims abstract description 16
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 14
- 239000010440 gypsum Substances 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 13
- 239000012190 activator Substances 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 16
- 230000008929 regeneration Effects 0.000 claims description 15
- 238000011069 regeneration method Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000292 calcium oxide Substances 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 11
- 239000004567 concrete Substances 0.000 description 9
- 239000011148 porous material Substances 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000011800 void material Substances 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
- 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/04—Alkali metal or ammonium silicate cements ; Alkyl silicate cements; Silica sol cements; Soluble silicate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/047—Zeolites
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- 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
- C04B22/143—Calcium-sulfate
Abstract
The invention provides a regenerative functional aggregate based on engineering waste soil, which comprises the following components in parts by mass: 240-320 parts of engineering waste soil micro powder, 20-40 parts of an alkali activator, 100-120 parts of cement, 120-180 parts of mineral substance ultra-fine powder, 2-4 parts of water glass and 80-100 parts of water; wherein the mineral ultrafine powder is prepared from fly ash, slag, gypsum and zeolite powder. The water absorption, crushing index and porosity of the recycled functional aggregate all meet the standard of recycled coarse aggregate.
Description
Technical Field
The invention belongs to the technical field of building material preparation, and particularly relates to a regeneration function aggregate based on engineering waste soil and a preparation method thereof.
Background
The urban construction brings about a large amount of engineering waste soil emission, including subway engineering waste soil, rail engineering waste soil, building foundation pit waste soil and the like. The engineering waste soil has the characteristics of large quantity, complex components, difficult treatment and the like. The situation that the existing waste soil is surrounded in a city cannot be solved by landfill disposal, and the engineering waste soil must inherit the concept of sustainable development and be fully and reasonably recycled.
Meanwhile, with continuous exploitation of natural sandstone, natural aggregate resources are gradually depleted, ecological environment is increasingly deteriorated, research work for recycling construction waste has been widely carried out at home and abroad, and particularly, a new technology for preparing recycled aggregate from construction waste provides a direction for resource utilization of engineering waste, and becomes one of hot spots and frontier problems concerned by engineering and academic circles at home and abroad.
At present, there are reports related to the use of engineering waste soil for the preparation of recycled aggregate, for example, in patent CN201911393127.3 "an artificial recycled aggregate prepared from engineering waste soil and its preparation method", the artificial recycled aggregate is prepared from building waste soil, cement, recycled micropowder and water glass as main raw materials. The artificial recycled aggregate has improved crushing index and water absorption. However, the recycled micro powder in the recycled aggregate only plays a role of filling, and the recycled micro powder filled into the building waste cannot chemically react with the building waste, and is only physically filled, so that the improvement of the crushing index and the water absorption rate is limited, and the performance of the recycled aggregate concrete in the later period is also influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the regeneration functional aggregate based on the engineering waste soil, and the water absorption rate, the crushing index and the porosity of the regeneration functional aggregate all accord with the standard of regeneration coarse aggregate.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
a regeneration function aggregate based on engineering waste soil comprises the following components in parts by mass: 240-320 parts of engineering waste soil micro powder, 20-40 parts of an alkaline activator, 100-120 parts of cement, 120-180 parts of mineral substance ultra-fine powder, 2-4 parts of water glass and 80-100 parts of water, wherein the mineral substance ultra-fine powder is prepared from fly ash, slag, gypsum and zeolite powder.
The mass ratio of the fly ash to the slag to the gypsum to the zeolite powder is 3:2:1: 1.
The alkali activator is calcium oxide.
The particle size of the mineral substance ultrafine powder is less than or equal to 5 mu m.
The engineering waste soil micro powder is obtained by drying, grinding and sieving engineering waste soil.
The grain size of the engineering waste soil micro powder is less than or equal to 0.15 mm; more preferably, the grain diameter of the engineering waste soil micro powder is less than or equal to 0.08 mm.
The modulus of the water glass is 3.5.
The cement is portland cement, and more preferably, the strength of the cement is 42.5 MPa.
The invention also provides a preparation method of the regeneration function aggregate based on the engineering waste soil, which comprises the following steps: (1) taking engineering waste soil micro powder, an alkaline activator, cement, mineral substance ultra-fine powder, water glass and water according to parts by mass, and putting the materials into a mortar mixer to be uniformly mixed;
(2) placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain an engineering waste soil green body after forming;
(3) and (3) putting the engineering waste soil green body into water for internal curing, wherein the curing temperature is 18-24 ℃, taking out after 28 days of curing, and naturally drying to obtain the regeneration functional aggregate.
Compared with the prior art, the regeneration function aggregate based on the engineering waste soil has the following advantages: (1) the regeneration functional aggregate provided by the invention takes engineering waste soil, cement, mineral substance ultrafine powder and water glass as main raw materials, calcium oxide is added to carry out alkali excitation on the engineering waste soil, and the materials supplement each other, so that the regeneration and utilization of the engineering waste soil are realized, and the problem of large discharge amount but no place accumulation of the engineering waste soil is solved.
(2) The mineral substance ultrafine powder is added in the invention, the ultrafine powder has large specific surface area, high surface energy, good dispersibility and adsorptivity, can fill the pores of the recycled functional aggregate, and reduces the water absorption of the recycled aggregate. And the ultrafine powder contains a proper amount of zeolite powder, the zeolite powder is in a porous structure, the microstructure of the recycled aggregate can be improved, the pore structure of the recycled aggregate is optimized, on one hand, the uniformity of material mixing is improved, on the other hand, the fly ash, the slag and the gypsum can partially enter the pore structure of the zeolite powder, and then the fly ash, the slag and the gypsum are filled into the pores of the engineering waste soil micro powder along with the zeolite powder and released from the pore channels of the zeolite powder in the subsequent hydration process to generate hydration reaction with the engineering waste soil. Meanwhile, the ultrafine powder also has higher pozzolanic activity, can improve the compactness of recycled aggregate concrete, increases the later strength, and is very beneficial to the application of recycled functional aggregate.
(3) The alkali activator calcium oxide is added, the calcium oxide increases the calcium hydroxide content of the material system, improves the alkalinity of the system, accelerates the process of secondary volcanic ash reaction, increases hydration products and enhances the strength.
(4) The invention adds a small amount of water glass sodium silicate solution, the sodium silicate can react with calcium hydroxide existing in the hydration of cement and calcium oxide to generate hydraulic calcium silicate colloid, and the hydraulic calcium silicate colloid can greatly improve the internal performance of the recycled aggregate, fill the pores of the recycled functional aggregate, reduce the porosity of the aggregate, reduce the water absorption of the recycled aggregate and increase the self strength of the recycled aggregate.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail with reference to the following examples.
Example 1
The regeneration function aggregate based on the engineering waste soil provided in the embodiment is prepared by the following method:
(1) preparing engineering waste soil micro powder: placing the engineering waste soil into an electric heating blast drying oven to be dried to constant weight, grinding the dried engineering waste soil by a grinding machine, and sieving by a 0.15mm sieve to obtain engineering waste soil micro powder;
(2) taking 320 parts of engineering waste soil micro powder, 40 parts of alkaline activator calcium oxide, 100 parts of cement, 120 parts of mineral substance ultra-fine powder, 3 parts of water glass and 100 parts of water by mass, putting the materials into a mortar mixer together, and uniformly mixing for 3min at the rotating speed of 120-150 r/min;
the mineral substance ultrafine powder is prepared from fly ash, slag, gypsum and zeolite powder, and the mass ratio of the fly ash, the slag, the gypsum and the zeolite powder is 3:2:1: 1.
(3) Placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain a recycled functional aggregate blank;
(4) and putting the recycled functional aggregate blank into water for internal curing, wherein the curing temperature is 20 ℃, taking out after 28 days of curing, and naturally drying to obtain the recycled functional aggregate 1# with the size of phi 7.87 mm.
The recycled functional aggregate No. 1 is detected according to the standard of the recycled coarse aggregate for GB/T25177-2010 concrete, the water absorption of the recycled functional aggregate No. 1 is 4.7%, the crushing index is 14.1%, and the porosity is 48.1%, so that the recycled functional aggregate meets the national standard.
Preparing recycled aggregate concrete from the prepared recycled functional aggregate, which specifically comprises the following materials: the concrete comprises regeneration functional aggregate based on engineering waste soil, fine aggregate, cement, fly ash, water, an additive and a water reducing agent. The prepared recycled aggregate concrete 28d has the compressive strength of 52Mpa and the water absorption of 1.2 percent. The high-strength recycled aggregate concrete can be prepared by using the recycled functional aggregate.
Example 2
The regeneration function aggregate based on the engineering waste soil provided in the embodiment is prepared by the following method:
(1) preparing engineering waste soil micro powder: placing the engineering waste soil into an electric heating blast drying oven to be dried to constant weight, grinding the dried engineering waste soil by a grinding machine, and sieving by a 0.15mm sieve to obtain engineering waste soil micro powder;
(2) taking 300 parts of engineering waste soil micro powder, 40 parts of alkaline activator calcium oxide, 100 parts of cement, 140 parts of mineral substance ultra-fine powder, 3 parts of water glass and 100 parts of water according to the parts by mass, putting the materials into a mortar stirrer together, and stirring uniformly for 3min at the rotating speed of 120-150 r/min;
the mineral substance ultrafine powder is prepared from fly ash, slag, gypsum and zeolite powder, and the mass ratio of the fly ash, the slag, the gypsum and the zeolite powder is 3:2:1: 1.
(3) Placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain a recycled functional aggregate blank;
(4) and putting the recycled functional aggregate blank into water for internal curing, wherein the curing temperature is 20 ℃, taking out after 28 days of curing, and naturally drying to obtain the recycled functional aggregate 2# with the size of phi 7.75 mm.
The recycled functional aggregate No. 1 is detected according to the standard of the recycled coarse aggregate for GB/T25177-2010 concrete, the water absorption of the recycled functional aggregate No. 1 is 4.4%, the crushing index is 13.6%, and the porosity is 47.6%, so that the recycled functional aggregate meets the national standard.
Example 3
The regeneration functional aggregate based on the engineering waste soil provided by the embodiment is prepared by the following method:
(1) preparing engineering waste soil micro powder: placing the engineering waste soil into an electric heating blast drying oven to be dried to constant weight, grinding the dried engineering waste soil by a grinding machine, and sieving by a 0.15mm sieve to obtain engineering waste soil micro powder;
(2) taking 280 parts of engineering waste soil micro powder, 40 parts of alkali activator calcium oxide, 100 parts of cement, 160 parts of mineral substance ultra-fine powder, 3 parts of water glass and 100 parts of water by mass, putting the materials into a mortar stirrer together, and stirring uniformly for 3min at the rotating speed of 120-150 r/min;
the mineral substance ultrafine powder is prepared from fly ash, slag, gypsum and zeolite powder, and the mass ratio of the fly ash, the slag, the gypsum and the zeolite powder is 3:2:1: 1.
(3) Placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain a recycled functional aggregate blank;
(4) and (3) putting the recycled functional aggregate blank into water for internal curing, wherein the curing temperature is 20 ℃, taking out after 28 days of curing, and naturally drying to obtain the recycled functional aggregate No. 3 with the size of phi 7.59 mm.
The recycled functional aggregate No. 1 is detected according to the standard of the recycled coarse aggregate for GB/T25177-2010 concrete, the water absorption of the recycled functional aggregate No. 1 is 4.2%, the crushing index is 12.9%, and the porosity is 47.3%, so that the recycled functional aggregate meets the national standard.
Comparative example 1
The recycled functional aggregate based on the engineering waste soil provided by the comparative example is prepared by the following method:
(1) preparing engineering waste soil micro powder: placing the engineering waste soil into an electric heating blast drying oven to be dried to constant weight, grinding the dried engineering waste soil by a grinding machine, and sieving by a 0.15mm sieve to obtain engineering waste soil micro powder;
(2) taking 320 parts of engineering waste soil micro powder, 40 parts of alkaline activator calcium oxide, 100 parts of cement, 3 parts of water glass and 100 parts of water by mass, putting the materials into a mortar stirrer together, and stirring uniformly for 3min at the rotating speed of 120-150 r/min;
(3) placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain a recycled functional aggregate blank;
(4) and putting the recycled functional aggregate blank into water for internal curing, wherein the curing temperature is 20 ℃, taking out after 28 days of curing, and naturally drying to obtain the recycled functional aggregate No. 4 with the size of phi 7.88 mm.
According to the GB/T25177-.
It can be seen from the above examples and comparative examples that the addition of mineral ultra fine powder can significantly improve the void ratio, water absorption rate and crushing index of the recycled functional aggregate based on the engineered waste soil micro powder system.
Claims (10)
1. A regeneration function aggregate based on engineering spoil is characterized in that: the regenerative functional aggregate comprises the following components in parts by mass: 240-320 parts of engineering waste soil micro powder, 20-40 parts of an alkaline activator, 100-120 parts of cement, 120-180 parts of mineral substance ultra-fine powder, 2-4 parts of water glass and 80-100 parts of water, wherein the mineral substance ultra-fine powder is prepared from fly ash, slag, gypsum and zeolite powder.
2. The method for preparing the recycled functional aggregate based on the engineering waste soil according to claim 1, wherein the method comprises the following steps: the mass ratio of the fly ash to the slag to the gypsum to the zeolite powder is 3:2:1: 1.
3. The method for preparing the recycled functional aggregate based on the engineering waste soil according to claim 1, wherein the method comprises the following steps: the alkali activator is calcium oxide.
4. The method for preparing the recycled functional aggregate based on the engineering waste soil according to claim 1, wherein the method comprises the following steps: the particle size of the mineral substance ultrafine powder is less than or equal to 5 mu m.
5. The engineering spoil-based regenerative functional aggregate according to claim 1, characterized in that: the engineering waste soil micro powder is obtained by drying, grinding and sieving engineering waste soil.
6. The engineering spoil-based regenerative functional aggregate according to claim 1, characterized in that: the grain size of the engineering waste soil micro powder is less than or equal to 0.15 mm.
7. The engineering spoil-based regenerative functional aggregate according to claim 1, characterized in that: the grain size of the engineering waste soil micro powder is less than or equal to 0.08 mm.
8. The engineering spoil-based regenerative functional aggregate according to claim 1, characterized in that: the modulus of the water glass is 3.5.
9. The engineering spoil-based regenerative functional aggregate according to claim 1, characterized in that: the cement is portland cement.
10. The preparation method of the recycled functional aggregate based on the engineering waste soil according to claim 1, characterized by comprising the following steps: (1) taking engineering waste soil micro powder, an alkaline activator, cement, mineral substance ultra-fine powder, water glass and water according to parts by mass, and putting the materials into a mortar mixer to be uniformly mixed;
(2) placing the mixed material into a cylindrical die for extrusion forming, wherein the diameter of the die is phi 8mm, and demoulding to obtain a recycled functional aggregate blank;
(3) and (3) putting the recycled functional aggregate blank into water for internal curing, wherein the curing temperature is 18-24 ℃, taking out after 28 days of curing, and naturally drying to obtain the recycled functional aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756516.3A CN115057641A (en) | 2022-06-30 | 2022-06-30 | Engineering waste soil-based regenerative functional aggregate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756516.3A CN115057641A (en) | 2022-06-30 | 2022-06-30 | Engineering waste soil-based regenerative functional aggregate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115057641A true CN115057641A (en) | 2022-09-16 |
Family
ID=83204960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210756516.3A Pending CN115057641A (en) | 2022-06-30 | 2022-06-30 | Engineering waste soil-based regenerative functional aggregate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115057641A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417657A (en) * | 2022-09-21 | 2022-12-02 | 蒋黔湘 | Environment-friendly wall plastering material with purification function and preparation method thereof |
| CN115974438A (en) * | 2022-12-02 | 2023-04-18 | 武汉三源特种建材有限责任公司 | Solid waste based low-calcium-silicon ratio functional aggregate and preparation method and application thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875107A (en) * | 2012-07-11 | 2013-01-16 | 北京科技大学 | Method for preparing ultralow cement artificial fishing reef concrete by waste concrete |
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN104030642A (en) * | 2014-06-30 | 2014-09-10 | 湖南省建筑工程集团总公司 | Fiber concrete |
| CN107500703A (en) * | 2017-07-26 | 2017-12-22 | 四川建筑职业技术学院 | A kind of environmentally friendly light-weight aggregate prepared using mud and preparation method thereof |
| CN109400029A (en) * | 2018-11-22 | 2019-03-01 | 盐城欣昌新型建材有限公司 | A method of cement pipe pile is processed using carbon fiber and regeneration concrete |
| CN109987912A (en) * | 2019-03-10 | 2019-07-09 | 胡春宇 | Zeolite prepares iron tailings dry powder and mortar |
| CN110357474A (en) * | 2019-07-19 | 2019-10-22 | 遵义市聚源建材有限公司 | A kind of concrete additive and preparation method thereof |
| CN110981245A (en) * | 2019-12-31 | 2020-04-10 | 深圳市华威环保建材有限公司 | Engineering waste soil light recycled aggregate and preparation method and application thereof |
| CN111170669A (en) * | 2019-12-30 | 2020-05-19 | 同济大学 | Artificial recycled aggregate prepared from engineering waste soil and preparation method thereof |
| CN113072342A (en) * | 2021-04-20 | 2021-07-06 | 北京市燕通建筑构件有限公司 | Concrete containing recycled aggregate and preparation method and application thereof |
| CN114031340A (en) * | 2021-11-30 | 2022-02-11 | 东南大学 | Plastering mortar containing recycled aggregate of waste clay brick |
-
2022
- 2022-06-30 CN CN202210756516.3A patent/CN115057641A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875107A (en) * | 2012-07-11 | 2013-01-16 | 北京科技大学 | Method for preparing ultralow cement artificial fishing reef concrete by waste concrete |
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN104030642A (en) * | 2014-06-30 | 2014-09-10 | 湖南省建筑工程集团总公司 | Fiber concrete |
| CN107500703A (en) * | 2017-07-26 | 2017-12-22 | 四川建筑职业技术学院 | A kind of environmentally friendly light-weight aggregate prepared using mud and preparation method thereof |
| CN109400029A (en) * | 2018-11-22 | 2019-03-01 | 盐城欣昌新型建材有限公司 | A method of cement pipe pile is processed using carbon fiber and regeneration concrete |
| CN109987912A (en) * | 2019-03-10 | 2019-07-09 | 胡春宇 | Zeolite prepares iron tailings dry powder and mortar |
| CN110357474A (en) * | 2019-07-19 | 2019-10-22 | 遵义市聚源建材有限公司 | A kind of concrete additive and preparation method thereof |
| CN111170669A (en) * | 2019-12-30 | 2020-05-19 | 同济大学 | Artificial recycled aggregate prepared from engineering waste soil and preparation method thereof |
| CN110981245A (en) * | 2019-12-31 | 2020-04-10 | 深圳市华威环保建材有限公司 | Engineering waste soil light recycled aggregate and preparation method and application thereof |
| CN113072342A (en) * | 2021-04-20 | 2021-07-06 | 北京市燕通建筑构件有限公司 | Concrete containing recycled aggregate and preparation method and application thereof |
| CN114031340A (en) * | 2021-11-30 | 2022-02-11 | 东南大学 | Plastering mortar containing recycled aggregate of waste clay brick |
Non-Patent Citations (3)
| Title |
|---|
| 严捍东主编: "新型建筑材料教程", 中国建材工业出版社, pages: 37 * |
| 张军华: "人造骨料可循环混凝土中界面过渡区结构演变", 《中国优秀硕士学位论文全文数据库》, pages 7 - 8 * |
| 王雅明等: "第五届水泥与混凝土国际会议综述", 《国外建材科技》, no. 04 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417657A (en) * | 2022-09-21 | 2022-12-02 | 蒋黔湘 | Environment-friendly wall plastering material with purification function and preparation method thereof |
| CN115417657B (en) * | 2022-09-21 | 2023-09-26 | 蒋黔湘 | Environment-friendly wall plastering material with purification function and preparation method thereof |
| CN115974438A (en) * | 2022-12-02 | 2023-04-18 | 武汉三源特种建材有限责任公司 | Solid waste based low-calcium-silicon ratio functional aggregate and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110818345B (en) | Clay stratum shield improved muck environment-friendly baking-free brick and preparation method thereof | |
| CN103086618B (en) | Construction waste micro-powder solidifying agent for solidifying soil mass | |
| CN115057641A (en) | Engineering waste soil-based regenerative functional aggregate and preparation method thereof | |
| CN105541140B (en) | A kind of geopolymer injecting paste material and preparation method and application | |
| CN103215043B (en) | Clinker-free steel slag fine powder composite soil solidifying agent | |
| CN112266193A (en) | Artificial steel slag aggregate and preparation method and application thereof | |
| CN113087427A (en) | Recycled aggregate soaked based on metakaolin slurry and modification method thereof | |
| CN112266264A (en) | Aerated concrete based on synergistic effect of alkali excitation and accelerated carbonization and preparation method thereof | |
| CN105060786A (en) | Feldspar waste material concrete and preparation method thereof | |
| CN108821621A (en) | A kind of light high-strength haydite and preparation method | |
| CN114988791A (en) | Flue grouting material doped with sulfur-rich lithium slag and preparation method and application thereof | |
| CN115029113B (en) | Premixed shield grouting material, shield grouting slurry and application thereof | |
| CN110642559B (en) | Coal ash geopolymer foam concrete and preparation method thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN115321890A (en) | Solid waste base binder for carbon dioxide sequestration, preparation method and carbon dioxide sequestration method thereof | |
| CN114890757A (en) | Recycled aggregate concrete and preparation method thereof | |
| CN113185169B (en) | Recycled aggregate soaked based on metakaolin slurry and modification method thereof | |
| CN109467370A (en) | A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof | |
| CN111574168A (en) | Silicon-manganese water quenching slag concrete | |
| CN115353336B (en) | Regenerated mortar for alkali-activated baking-free waste residue soil bricks and preparation method and application thereof | |
| CN115385716B (en) | Baking-free lightweight aggregate and preparation method thereof | |
| CN101891420A (en) | Phosphorus slag powder building mortar | |
| CN107954659A (en) | A kind of foamed light heat-preserving wall produced with electroplating sludge and its manufacture method | |
| CN112341051A (en) | Aerated concrete and preparation method thereof | |
| CN111302751A (en) | Wall material composite material |
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 |