CN111662030A - Method for improving quality of recycled fine aggregate by utilizing cane molasses - Google Patents
Method for improving quality of recycled fine aggregate by utilizing cane molasses Download PDFInfo
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- CN111662030A CN111662030A CN202010430855.3A CN202010430855A CN111662030A CN 111662030 A CN111662030 A CN 111662030A CN 202010430855 A CN202010430855 A CN 202010430855A CN 111662030 A CN111662030 A CN 111662030A
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- fine aggregate
- recycled fine
- recycled
- cane molasses
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for improving the quality of recycled fine aggregate by utilizing cane molasses, which is characterized by comprising the following steps: step 1, cleaning and drying recycled fine aggregate prepared from waste concrete; step 2, completely immersing the recycled fine aggregate treated in the step 1 into a cane molasses solution for soaking; and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve, cleaning, and naturally airing. The problem of poor performance of the recycled fine aggregate prepared by utilizing the construction waste is solved, the performance of the recycled fine aggregate is improved, the cost is reduced, and the waste concrete is recycled.
Description
Technical Field
The invention belongs to the technical field of building material treatment, and relates to a method for improving the quality of recycled fine aggregate by utilizing cane molasses.
Background
With the rapid development of society, the nation has greatly advanced the modernization construction, so the domestic construction industry is in the rapid development period at present. The large-area reconstruction of old buildings and the development of new buildings bring two problems of building waste enclosing city and insufficient building material resources. Meanwhile, the resources of natural sand in most regions are increasingly in shortage, and in the situation, the natural sand is replaced by broken mined mountain stones in part of regions, so that mine resources are seriously consumed. The method has the advantages that the waste concrete is prepared into the recycled fine aggregate, so that the problem of construction waste can be solved, the exploitation of river sand and mines can be reduced, and the method achieves two purposes at one stroke.
The traditional preparation method of the recycled aggregate comprises the steps of crushing the waste concrete for one time or multiple times, and then screening to obtain the recycled aggregates with different particle sizes, wherein the recycled aggregates comprise recycled fine aggregates with the particle size being more than 5mm and traditional recycled fine aggregates with the particle size being less than 5 mm. As the traditional recycled fine aggregate is mainly sourced from the mortar part in concrete, the traditional recycled fine aggregate has low apparent density, high micro powder content, high water absorption and low crushing index value. Compared with river sand concrete with the same proportion, the working performance of the traditional recycled fine aggregate concrete is deteriorated along with the increase of the substitution rate, and the concrete is difficult to popularize and apply in engineering. This is consistent with the current situation that the recycled fine aggregate is applied to concrete in a small amount, is frequently used for filling, and has a low selling price. Therefore, the method has great research significance on how to improve the aggregate quality of the recycled fine aggregate and improve the application value of the recycled fine aggregate.
It is well known that the sugar industry can make a great contribution to the economic development of regions and can be one of the most serious pollution industries at the same time. Cane molasses is an industrial waste material produced in the sugar production process, commonly known as orange water. It is a dark brown, viscous liquid. The cane molasses contains components including sucrose, reducing sugar, pigment, inorganic salts and other trace minerals, and is an excellent fermentation raw material, so that a large amount of molasses is used to ferment alcohol. The cane molasses is mainly used as a raw material for producing cement grinding aids and concrete additives in the building industry at present in the building industry.
Disclosure of Invention
The invention aims to provide a method for improving recycled fine aggregate by utilizing cane molasses, and solves the problem of poor performance of the recycled fine aggregate in the prior art.
The technical scheme adopted by the invention is that a method for improving the quality of recycled fine aggregate by utilizing cane molasses is implemented according to the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete;
step 2, completely immersing the recycled fine aggregate treated in the step 1 into a cane molasses solution for soaking;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve, cleaning, and naturally airing.
The invention is also characterized in that:
in the step 2, the mass concentration of the cane molasses solution is 5-20%.
And 2, the soaking time is 3-5 days, and the stirring is carried out once every 2 hours in the soaking process.
The aperture of the sieve used in the screening process in the step 4 is 0.15 mm.
The particle size of the recycled fine aggregate is 0.15 mm-4.75 mm.
The invention has the beneficial effects that:
(1) the method for improving the quality of the recycled fine aggregate by utilizing the cane molasses comprises the steps of soaking the recycled fine aggregate in the cane molasses solution to form a hydrophilic membrane with the same charge, so that cement particles are mutually repelled, cement hydration is hindered, the mortar strength on the surface of the recycled fine aggregate is seriously degraded, the cement particles fall off in the stirring process, the water absorption rate of the recycled fine aggregate is reduced, and the mechanical property of the recycled mortar is improved;
(2) the method for improving the quality of the recycled fine aggregate by utilizing the cane molasses has the advantages that the cane molasses is low in cost and easy to obtain, and the used cane molasses solution can be recycled and continuously utilized, so that the cost of strengthening the recycled fine aggregate is further reduced;
(3) the method for improving the quality of the recycled fine aggregate by utilizing the cane molasses can widely utilize the recycled fine aggregate, save a large amount of garbage treatment cost and reduce the environmental pollution;
(4) the method for improving the quality of the recycled fine aggregate by utilizing the cane molasses repairs and improves the recycled fine aggregate of the waste concrete, can improve the quality of the recycled fine aggregate, and can also pour large-volume hydraulic concrete, roller compacted concrete, concrete constructed under hot weather conditions, concrete poured in a large area, concrete without cold seams, concrete needing long-time parking or long-distance transportation and the like by utilizing the improved recycled fine aggregate because the cane molasses can prolong the concrete setting time.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a method for improving the quality of recycled fine aggregate by utilizing cane molasses, which is implemented according to the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete, wherein the particle size of the recycled fine aggregate is 0.15-4.75 mm;
step 2, completely immersing the recycled fine aggregate treated in the step 1 into a cane molasses solution with the mass concentration of 5-20% for soaking for 3-5 days, and stirring once every 2 hours in the soaking process;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve with the aperture of 0.15mm, cleaning, and naturally airing.
Example 1
The invention relates to a method for improving the quality of recycled fine aggregate by utilizing cane molasses, which is implemented according to the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete, wherein the particle size of the recycled fine aggregate is 0.15-4.75 mm;
step 2, completely immersing the recycled fine aggregate processed in the step 1 into a cane molasses solution with the mass concentration of 5% for soaking for 3 days, and stirring once every 2 hours in the soaking process;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve with the aperture of 0.15mm, cleaning, and naturally airing.
The saturated dry surface water absorption of the treated recycled fine aggregate is tested according to a test method specified by a construction sand standard (GB14684-2011), and then, referring to a test method in a cement mortar strength test method (ISO method) (GB/T17671-1999), the treated recycled fine aggregate, cement and water (net water consumption) are prepared into recycled mortar according to a mass ratio of 6:2:1, and a compression strength test is carried out, wherein samples collected by the test are samples which are soaked for 1 day, soaked for 2 days and soaked for 3 days.
Example 2
The invention relates to a method for improving the quality of recycled fine aggregate by utilizing cane molasses, which is implemented according to the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete, wherein the particle size of the recycled fine aggregate is 0.15-4.75 mm;
step 2, completely immersing the recycled fine aggregate processed in the step 1 into a cane molasses solution with the mass concentration of 10% for soaking for 4 days, and stirring once every 2 hours in the soaking process;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve with the aperture of 0.15mm, cleaning, and naturally airing.
Testing the saturated surface dry water absorption of the treated recycled fine aggregate according to a test method specified by a construction sand standard (GB14684-2011), preparing the recycled mortar from the treated recycled fine aggregate, cement and water (net water consumption) according to a mass ratio of 6:2:1 by referring to a test method in a cement mortar strength test method (ISO method) (GB/T17671-1999), and testing the compressive strength, wherein samples collected by testing are samples soaked for 1 day, 2 days, 3 days and 4 days respectively.
Example 3
The invention relates to a method for improving the quality of recycled fine aggregate by utilizing cane molasses, which is implemented according to the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete, wherein the particle size of the recycled fine aggregate is 0.15-4.75 mm;
step 2, completely immersing the recycled fine aggregate processed in the step 1 into a cane molasses solution with the mass concentration of 20% for soaking for 5 days, and stirring once every 2 hours in the soaking process;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve with the aperture of 0.15mm, cleaning, and naturally airing.
Testing the saturated surface dry water absorption of the treated recycled fine aggregate according to a test method specified by a construction sand standard (GB14684-2011), preparing the recycled mortar from the treated recycled fine aggregate, cement and water (net water consumption) according to a mass ratio of 6:2:1 by referring to a test method in a cement mortar strength test method (ISO method) (GB/T17671-1999), and testing the compressive strength, wherein samples collected by testing are samples which are soaked for 1 day, soaked for 2 days, soaked for 3 days, soaked for 4 days and soaked for 5 days.
Comparative example
Selecting recycled fine aggregate with the particle size of 0.15-4.75 mm, carrying out no treatment on the recycled fine aggregate, measuring the saturated surface dry water absorption of the recycled fine aggregate according to a test method specified in GB14684-2011, and preparing recycled mortar from the treated recycled fine aggregate, cement and water (net water consumption) according to a mass ratio of 6:2:1 and carrying out a compression strength test by referring to a test method in a cement mortar strength test method (ISO method) (GB/T17671-1999).
And (3) test comparison:
the dry water absorption at saturation level and the compressive strength of the recycled mortar of the recycled fine aggregates treated in examples 1 to 3 were tested, and the dry water absorption at saturation level and the compressive strength of the recycled mortar of the recycled fine aggregates untreated in comparative examples were tested, and the dry water absorption at saturation level of the recycled aggregates was shown in table 1 and the dry water absorption at saturation level was shown in table 2.
Table 1 recycled aggregate saturated surface dry water absorption test results
TABLE 2 compression Strength test results of recycled mortar
The water absorption and the compressive strength are important indexes of the performance of the recycled aggregate and the recycled sand in the application of the reaction building engineering, and as can be seen from table 1, after the recycled fine aggregate is improved by utilizing the cane molasses solution, the saturation surface dry water absorption is obviously reduced in different degrees, and the compressive strength of the recycled mortar is obviously improved in different degrees, so that the service performance of the treated recycled aggregate is greatly improved, as can be seen from the comparison, the mass fraction of the cane molasses solution in the example 3 is 10%, the soaking time is 5 days, at the moment, the saturation surface dry water absorption of the recycled fine aggregate is reduced by 26.2%, and the compressive strength of the recycled mortar is increased by 29.3%.
The method for improving the quality of the recycled fine aggregate by utilizing the cane molasses comprises the steps of soaking the recycled fine aggregate in the cane molasses solution to form a hydrophilic membrane with the same charge, so that cement particles are mutually repelled, cement hydration is prevented, the mortar strength on the surface of the recycled fine aggregate is seriously degraded, the cement particles fall off in the stirring process, the water absorption rate of the recycled fine aggregate is reduced, and the mechanical property of the recycled mortar is improved. Compared with the high-quality recycled fine aggregate prepared by the existing method, the production cost is reduced, the recycled fine aggregate can be widely utilized, the problems of difficult treatment of a large amount of concrete wastes and negative influence on the environment caused by the difficult treatment of the concrete wastes are solved, a large amount of garbage treatment cost is saved, and huge social benefits and environmental protection benefits are generated. Meanwhile, compared with the method for strengthening the fine aggregate by using the additive in the traditional method, the method has the advantages that the cane molasses is used, the cost is low, the cane molasses is easy to obtain, and the cost for strengthening the regenerated fine aggregate is greatly reduced on the whole from the two aspects of the cost of the material and the cost of the substituted material.
Claims (5)
1. A method for improving the quality of recycled fine aggregate by utilizing cane molasses is characterized by comprising the following steps:
step 1, cleaning and drying recycled fine aggregate prepared from waste concrete;
step 2, completely immersing the recycled fine aggregate treated in the step 1 into a cane molasses solution for soaking;
and 3, taking out the recycled fine aggregate soaked in the step 2 by using a sieve, cleaning, and naturally airing.
2. The method for improving the quality of recycled fine aggregate by using cane molasses as claimed in claim 1, wherein the mass concentration of the cane molasses solution in step 2 is 5-20%.
3. The method for improving the quality of recycled fine aggregate by using cane molasses as claimed in claim 1, wherein the soaking time in step 2 is 3-5 days, and the stirring is performed every 2h during the soaking process.
4. The method for improving the quality of recycled fine aggregate by using cane molasses as claimed in claim 1, wherein the size of the sieve used in the sieving process in step 4 is 0.15 mm.
5. The method for improving the quality of recycled fine aggregate by using cane molasses as claimed in claim 1, wherein the recycled fine aggregate has a particle size of 0.15mm to 4.75 mm.
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| CN202010430855.3A CN111662030B (en) | 2020-05-20 | 2020-05-20 | Method for improving quality of recycled fine aggregate by utilizing cane molasses |
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| CN202010430855.3A CN111662030B (en) | 2020-05-20 | 2020-05-20 | Method for improving quality of recycled fine aggregate by utilizing cane molasses |
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| CN111662030A true CN111662030A (en) | 2020-09-15 |
| CN111662030B CN111662030B (en) | 2021-09-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767960A (en) * | 2008-12-29 | 2010-07-07 | 沈阳建筑大学 | Recycled concrete coarse aggregate modified processing method |
| CN104909628A (en) * | 2015-05-29 | 2015-09-16 | 柳州普亚贸易有限公司 | Method for fabricating novel recycled bricks from sugar refinery filter mud |
| US20160347660A1 (en) * | 2013-10-18 | 2016-12-01 | Sika Technology Ag | Alkaline-treated inverted molasses as dispersants for mineral suspensions |
| CN106673592A (en) * | 2017-01-10 | 2017-05-17 | 盛丹 | Method for preparing concrete pavement brick by using recycled aggregate of construction waste |
| CN107460805A (en) * | 2017-07-04 | 2017-12-12 | 深圳市华威环保建材有限公司 | A kind of regeneration aggregate ecological permeable bricks and its production technology |
| CN107663074A (en) * | 2017-07-04 | 2018-02-06 | 深圳市华威环保建材有限公司 | A kind of manufacturing process of regeneration aggregate art brick |
-
2020
- 2020-05-20 CN CN202010430855.3A patent/CN111662030B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767960A (en) * | 2008-12-29 | 2010-07-07 | 沈阳建筑大学 | Recycled concrete coarse aggregate modified processing method |
| US20160347660A1 (en) * | 2013-10-18 | 2016-12-01 | Sika Technology Ag | Alkaline-treated inverted molasses as dispersants for mineral suspensions |
| CN104909628A (en) * | 2015-05-29 | 2015-09-16 | 柳州普亚贸易有限公司 | Method for fabricating novel recycled bricks from sugar refinery filter mud |
| CN106673592A (en) * | 2017-01-10 | 2017-05-17 | 盛丹 | Method for preparing concrete pavement brick by using recycled aggregate of construction waste |
| CN107460805A (en) * | 2017-07-04 | 2017-12-12 | 深圳市华威环保建材有限公司 | A kind of regeneration aggregate ecological permeable bricks and its production technology |
| CN107663074A (en) * | 2017-07-04 | 2018-02-06 | 深圳市华威环保建材有限公司 | A kind of manufacturing process of regeneration aggregate art brick |
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| CN111662030B (en) | 2021-09-24 |
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