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CN-121974590-A - Process and device for reinforcing recycled coarse aggregate in concrete processing

CN121974590ACN 121974590 ACN121974590 ACN 121974590ACN-121974590-A

Abstract

The invention relates to the technical field of recycling of solid waste of buildings, in particular to a recycled coarse aggregate strengthening process and a device thereof for concrete processing, wherein the process comprises the following steps of S1, raw material pretreatment, crushing and screening waste concrete to obtain recycled coarse aggregate with the particle size of 5-26mm, water washing, impurity removal and low-temperature drying to constant weight; S2, composite modification treatment, namely preparing composite modification liquid, immersing the pretreated regenerated coarse aggregate into the composite modification liquid, adopting centrifugal stirring to assist permeation, screening out superfluous surface modification liquid after the soaking is finished, and S3, carbonization and solidification treatment, namely placing the regenerated coarse aggregate with the surface attached with the modification liquid in a closed environment, introducing CO 2 gas, and carrying out carbonization reaction.

Inventors

  • XIE JING
  • XIE LEI
  • YUAN YUCHENG

Assignees

  • 宁波北仑晶阳混凝土有限公司

Dates

Publication Date
20260505
Application Date
20260311

Claims (10)

  1. 1. The process for reinforcing the recycled coarse aggregate for concrete processing is characterized by comprising the following steps of: S1, raw material pretreatment, namely crushing and screening waste concrete to obtain recycled coarse aggregate with the particle size of 5-26mm, washing with water to remove impurities, and drying at low temperature to constant weight; s2, composite modification treatment, namely preparing composite modification liquid, immersing the pretreated regenerated coarse aggregate into the composite modification liquid, adopting centrifugal stirring to assist in permeation, and screening out superfluous modification liquid on the surface after the soaking is finished; S3, carbonization and solidification treatment, namely placing the regenerated coarse aggregate with the surface attached with the modifying liquid in a closed environment, and introducing CO 2 gas to carry out carbonization reaction; S4, curing and molding, namely curing the carbonized regenerated coarse aggregate at a constant temperature; S5, quality detection, namely measuring the water absorption, crushing value and los Angeles abrasion value of the recycled coarse aggregate after curing.
  2. 2. The recycled coarse aggregate reinforcing process for concrete processing according to claim 1, wherein: s1, washing for 15-30min, and drying at a low temperature of 60-80 ℃ to control the needle-shaped content of the regenerated coarse aggregate below 10%; the composite modifying liquid in S2 consists of 40-60 parts of cement, 10-15 parts of silica fume, 20-30 parts of fly ash, 0.8-1.2 parts of silane coupling agent and 25-40 parts of deionized water according to parts by weight, the water-gel ratio is 0.25-0.35, the stirring speed of the composite modifying liquid is 800-1200r/min, and the stirring time is 15-20min.
  3. 3. The recycled coarse aggregate reinforcing process for concrete processing according to claim 2, wherein: S2, the centrifugal stirring rotating speed is 300-500r/min, the stirring time is 30-60S/time, stirring is carried out every 15min, the soaking time is 2-4h, and the mass of the modification liquid attached to the surface of the aggregate is 5-8% of the dry mass of the aggregate; The purity of CO 2 gas in S3 is 90% -100%, the reaction pressure is 0.3-0.5MPa, the reaction temperature is 25-35 ℃, the carbonization curing time is 1-2h, the constant temperature curing temperature in S4 is 50-60 ℃, the relative humidity is 60% -70%, and the curing time is 6-8h.
  4. 4. The regenerated coarse aggregate strengthening device for concrete processing is suitable for the regenerated coarse aggregate strengthening process for concrete processing according to claim 3, and is characterized by comprising a diversion discharge main body (1), a flushing processing main body (2), a first supporting leg (3), a second supporting leg (4), a first track supporting plate (5), a first electric push rod (6), a pretreatment main body (7), a first fixed supporting frame (8), a second fixed supporting frame (9) and a screening main body (10), wherein the screening main body (10) is arranged below the pretreatment main body (7), the second fixed supporting frame (9) is fixedly connected to two sides of the screening main body (10), the first fixed supporting frame (8) is arranged on two sides of the pretreatment main body (7), the bottom end of the first fixed supporting frame (8) is fixedly connected with the upper end of the second fixed supporting frame (9), the diversion discharge main body (1) is arranged on the outer side of the screening main body (10), the first track (5) is symmetrically distributed, the second supporting frame (4) is fixedly connected to the two sides of the first track (5) which are uniformly arranged on the first track (5) and the first supporting frame (5) and the first electric supporting frame (5) is fixedly arranged on the outer side of the track (5), the first supporting leg (3) is fixedly connected to the bottom end of the second fixed supporting frame (9).
  5. 5. The recycled coarse aggregate reinforcing device for concrete processing according to claim 4, wherein the pretreatment main body (7) comprises a feed hopper (11), a hydraulic cylinder (12), a crushing box (13), a fixing bolt (14), a limiting frame (15), a threaded hole (16), an adjusting arm (17), a third electric push rod (18), a telescopic limiting ring (19), a movable adjusting frame (20), a supporting frame (21), a first motor (22), a conveying connecting pipe (23), a swinging adjusting plate (24), a spraying hole (25), an extrusion crushing plate (26), a crushing cone (27), A first auxiliary crushing wheel (28), The second auxiliary crushing wheel (29) and the second motor (30), the feed hopper (11) is fixedly connected with the upper end of the crushing box (13) through bolts, the supporting frame (21) is fixedly installed at the side end of the feed hopper (11) through bolts, the bottom end of the swing regulating plate (24) is rotatably installed at the upper end of the supporting frame (21), the first motor (22) is fixedly installed at the upper side end of the supporting frame (21), the driving end of the first motor (22) is fixedly connected with the bottom side end of the swing regulating plate (24), the conveying connecting pipe (23) is uniformly and fixedly installed at the side end of the swing regulating plate (24), the spraying hole (25) is uniformly and fixedly installed at the bottom end of the swing regulating plate (24), the conveying connecting pipe (23) is communicated with the inside of the spraying hole (25) through the swing regulating plate (24), the telescopic limiting ring (19) is slidably clamped inside the bottom end of the crushing box (13), the third electric push rod (18) is fixedly installed at the bottom side end of the electric push rod (13) symmetrically and fixedly installed at the bottom end of the electric push rod (18) is fixedly connected with the bottom end of the hydraulic push rod (12) at the bottom end of the electric push rod (12), the crushing and crushing plate (26) is rotationally arranged in the upper end of the crushing box (13), the crushing cone (27) is evenly and fixedly arranged at the outer side end of the crushing and crushing plate (26), the front end of the hydraulic cylinder (12) is rotationally connected with the inner side end of the bottom of the crushing and crushing plate (26), the movable adjusting frame (20) is rotationally clamped on the crushing box (13), the adjusting arms (17) are evenly and fixedly arranged at two sides of the movable adjusting frame (20), the limiting frame (15) is fixedly arranged at two sides of the crushing box (13), the adjusting arms (17) are slidingly inserted on the limiting frame (15), the threaded holes (16) are evenly and fixedly arranged on the adjusting arms (17), the fixed bolts (14) are in threaded insertion connection with the limiting frame (15) and the adjusting arms (17), the first auxiliary crushing wheel (28) is rotationally arranged in the inside of the movable adjusting frame (20), the second auxiliary crushing wheel (29) is rotationally arranged at two sides of the movable adjusting frame (20), the second auxiliary crushing wheel (29) is fixedly arranged at two sides of the crushing box (13), the second motor (30) and the middle part of the second auxiliary crushing wheel (30) is fixedly arranged at the driving end (30) of the crushing and is fixedly connected with the crushing and driving end (30), the first and second additional crusher wheels (28, 29) are located below the crushing plate (26).
  6. 6. The recycled coarse aggregate reinforcing apparatus for concrete processing according to claim 5, wherein the screening main body (10) comprises a first screening part (100), a second screening part (31) and a third screening part (32), the second screening part (31) is arranged between the first screening part (100) and the third screening part (32), the first screening part (100), the second screening part (31) and the third screening part (32) have the same structure, the first screening part (100) comprises a third motor (34), a screening net frame (34), a first rotating adjusting toothed ring (35), a first driving gear (36), a first limiting snap ring (37), a fourth motor (38), a rotating supporting arm (39), a supporting base (40), a second rail supporting plate (41) and a fourth electric pushing rod (42), the second rail supporting plate (41) is symmetrically arranged, the supporting base (40) is slidably clamped on the second rail supporting plate (41), the fourth electric pushing rod (42) is fixedly mounted on the second supporting plate (41), and the bottom end of the fourth supporting rod (41) is fixedly mounted on the bottom end of the second supporting plate (41), the utility model provides a screening frame, including screening frame (34), rotary support arm (39) are in the both sides bottom of first spacing snap ring (37), the bottom edge rotation joint of screening frame (34) is in on first spacing snap ring (37), first rotation is adjusted toothed ring (35) fixed mounting and is in the outside bottom of screening frame (34), fourth motor (38) fixed mounting is in one side upper portion of first spacing snap ring (37), first spacing snap ring (37) are distributed in the both sides upper portion of first rotation is adjusted toothed ring (35), just first rotation is adjusted toothed ring (35) rotation and is installed on first spacing snap ring (37), first drive gear (36) with first rotation is adjusted toothed ring (35) meshing and is connected, the drive end of fourth motor (38) is in with the outside middle part fixed connection of a first drive gear (36), screening hole aperture that sets up in screening frame (34) in first screening portion (100) is greater than screening hole aperture in screening frame (34) in second screening portion (31) screening hole that sets up in screening frame (34).
  7. 7. The recycled coarse aggregate reinforcing device for concrete processing according to claim 6, wherein the flushing processing main body (2) comprises a second limiting snap ring (43), a fifth motor (44), a second rotation adjusting toothed ring (45), a blocking limiting frame (46), a fifth electric push rod (47), a conical guide block (48), a bottom supporting support plate (49), a limiting support plate (50), a sixth electric push rod (51), a supporting vertical plate (52), a sixth motor (53), a swinging adjusting arm (54), a connecting hose (55), an electric control valve (56), a nozzle (57) and a second driving gear (60), wherein the second rotation adjusting toothed ring (45) is rotationally clamped on the second limiting snap ring (43), the blocking limiting frame (46) is fixedly arranged inside the second rotation adjusting toothed ring (45), the fifth motor (44) is fixedly arranged at the upper part of one side of the second limiting snap ring (43), the second driving gear (60) is distributed at the upper parts of two sides of the second rotation adjusting toothed ring (45), the second driving gear (60) is fixedly meshed with the middle part of the second rotation adjusting toothed ring (45), the bottom support supporting plate (49) is in sliding connection with the inside of the baffle limiting frame (46), the conical split guide block (48) is fixedly arranged at the middle part of the upper end of the bottom support supporting plate (49), the fifth electric push rod (47) is uniformly and symmetrically and fixedly arranged on the second limiting snap ring (43), the bottom end of the fifth electric push rod (47) is fixedly connected with the bottom of the bottom support supporting plate (49), the limiting support plate (50) is uniformly and fixedly arranged at the outer side end of the second rotating adjustment toothed ring (45), the bottom end of the supporting vertical plate (52) is in sliding connection with the upper part of the outer side end of the limiting support plate (50), the front end of the sixth electric push rod (51) is fixedly connected with the bottom end of the supporting vertical plate (52), the bottom end of the swinging adjustment arm (54) is rotationally connected with the inner side of the upper end of the supporting vertical plate (52), the bottom end of the swinging adjustment arm (53) is fixedly arranged at the outer side end of the supporting vertical plate (52), the bottom end of the swinging adjustment arm (54) is fixedly connected with the driving end of the swinging adjustment arm (54), the electric control valve (56) is fixedly arranged at the upper end of the swing adjusting arm (54), and the connecting hose (55) is fixedly connected to the electric control valve (56).
  8. 8. The recycled coarse aggregate reinforcing device for concrete processing according to claim 7, wherein the diversion and discharge main body (1) comprises diversion and conveying frames (58) and discharge frames (59), the diversion and conveying frames (58) are uniformly distributed and arranged in three, and the discharge frames (59) are fixedly connected between the bottom ends of the diversion and conveying frames (58).
  9. 9. The recycled coarse aggregate reinforcing device for concrete processing according to claim 8, wherein bottom ends of two sides of the second limiting snap ring (43) are slidably clamped on the first rail supporting plate (5), the front end of the first electric push rod (6) is fixedly connected with the upper part of the side end of the second limiting snap ring (43), the second fixed supporting frame (9) is fixedly connected with the side ends of the second rail supporting plate (41) in the first screening part (100), the second screening part (31) and the third screening part (32), and the crushing box (13) is positioned right above the screening net frame (34) in the first screening part (100).
  10. 10. The recycled coarse aggregate reinforcing device for concrete processing according to claim 9, wherein the three diversion and conveying frames (58) are respectively positioned below the outer sides of the screening frames (34) in the first screening part (100), the second screening part (31) and the third screening part (32), and the inner side ends of the diversion and conveying frames (58) are fixedly connected with the front ends of the second track supporting plates (41).

Description

Process and device for reinforcing recycled coarse aggregate in concrete processing Technical Field The invention relates to the technical field of recycling of building solid wastes, in particular to a recycled coarse aggregate strengthening process and a device thereof for concrete processing. Background The method is characterized in that a large amount of construction waste such as waste concrete is generated in the process of infrastructure construction, the traditional landfill treatment mode not only occupies land resources, but also causes environmental pollution, the waste concrete is crushed and screened to prepare recycled coarse aggregate, and the resource recycling is realized, so that the method is an effective way for solving the problems, however, a large amount of loose and porous aging mortar is usually attached to the surface of the recycled coarse aggregate, and a large amount of microcracks exist in the recycled coarse aggregate, the application of the recycled coarse aggregate in high-performance concrete is severely limited, the existing single chemical strengthening process such as acid liquor soaking can remove part of the attached mortar, harmful ions are introduced to cause secondary pollution, the water consumption in the flushing process is large, the existing composite strengthening process has the problems of complex steps, high energy consumption, unstable strengthening effect and the like, and the effect of the pretreatment of the construction waste such as waste concrete is large, so that the particles are unfavorable for recycling, and therefore, a recycling coarse aggregate which is simple to operate, is environment-friendly and efficient and has obvious strengthening effect is needed, and the construction waste such as waste concrete can be fully and reasonably treated and recycled. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a recycled coarse aggregate strengthening process and a device thereof for concrete processing. The technical scheme adopted for solving the technical problems is that the recycled coarse aggregate strengthening process for concrete processing comprises the following steps: S1, raw material pretreatment, namely crushing and screening waste concrete to obtain recycled coarse aggregate with the particle size of 5-26mm, washing with water to remove impurities, and drying at low temperature to constant weight; s2, composite modification treatment, namely preparing composite modification liquid, immersing the pretreated regenerated coarse aggregate into the composite modification liquid, adopting centrifugal stirring to assist in permeation, and screening out superfluous modification liquid on the surface after the soaking is finished; S3, carbonization and solidification treatment, namely placing the regenerated coarse aggregate with the surface attached with the modifying liquid in a closed environment, and introducing CO 2 gas to carry out carbonization reaction; S4, curing and molding, namely curing the carbonized regenerated coarse aggregate at a constant temperature; And S5, quality detection, namely measuring the water absorption, crushing value and los Angeles abrasion value of the recycled coarse aggregate after curing, and obtaining the qualified reinforced recycled coarse aggregate. Specifically, the washing time in S1 is 15-30min, the low-temperature drying temperature is 60-80 ℃, the needle-shaped content of the regenerated coarse aggregate is controlled below 10%, the composite modifying liquid in S2 consists of 40-60 parts of cement, 10-15 parts of silica fume, 20-30 parts of fly ash, 0.8-1.2 parts of silane coupling agent and 25-40 parts of deionized water according to parts by weight, the water-gel ratio is 0.25-0.35, the stirring speed of the composite modifying liquid is 800-1200r/min, and the stirring time is 15-20min. Specifically, the centrifugal stirring speed in S2 is 300-500r/min, the stirring time is 30-60S/time, stirring is carried out every 15min, the soaking time is 2-4h, the mass of the modified liquid attached to the surface of the aggregate is 5-8% of the dry mass of the aggregate, the purity of CO 2 gas in S3 is 90-100%, the reaction pressure is 0.3-0.5MPa, the reaction temperature is 25-35 ℃, the carbonization curing time is 1-2h, the constant temperature curing temperature in S4 is 50-60 ℃, the relative humidity is 60-70%, and the curing time is 6-8h. The utility model provides a concrete processing's regeneration coarse aggregate reinforcing apparatus, includes water conservancy diversion emission main part, washes processing main part, first supporting leg, second supporting leg, first track backup pad, first electric putter, preliminary treatment main part, first fixed bolster, second fixed bolster and divides the sieve main part, divide the sieve main part to set up the below of preliminary treatment main part, second fixed bolster fixed connection is in divide the both si