EP4392492A1 - Régénérateur de recyclage de mélanges bitumineux vieillis - Google Patents

Régénérateur de recyclage de mélanges bitumineux vieillis

Info

Publication number
EP4392492A1
EP4392492A1 EP22787735.4A EP22787735A EP4392492A1 EP 4392492 A1 EP4392492 A1 EP 4392492A1 EP 22787735 A EP22787735 A EP 22787735A EP 4392492 A1 EP4392492 A1 EP 4392492A1
Authority
EP
European Patent Office
Prior art keywords
oil
bio
rejuvenator
binder
asphalt
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
Application number
EP22787735.4A
Other languages
German (de)
English (en)
Inventor
Satish Pandey
Sangita Sharma
Prateek Tulsyan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Verma Industries
Council of Scientific and Industrial Research CSIR
Original Assignee
Verma Industries
Council of Scientific and Industrial Research CSIR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Verma Industries, Council of Scientific and Industrial Research CSIR filed Critical Verma Industries
Publication of EP4392492A1 publication Critical patent/EP4392492A1/fr
Pending legal-status Critical Current

Links

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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/08—Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
    • C04B24/085—Higher fatty acids
    • 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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction

Definitions

  • the present disclosure relates to an asphalt rejuvenator, a paving composition, and a process for preparing a paving composition. Specifically, the disclosure relates to bio-oil based asphalt rejuvenator, a paving composition and a process for preparing a paving composition based on the asphalt rejuvenator.
  • the disclosure also provides a paving composition.
  • the paving composition comprises 30 % to 80 % w/w reclaimed asphalt pavement (RAP) material, 70 % to 20 % w/w freshly crushed natural aggregate, 2% to 4 w/w % virgin bitumen and 2% to 6% w/w % rejuvenator by weight of residual bitumen content in the reclaimed asphalt pavement (RAP) material wherein the rejuvenator, comprises a Bio-oil A, wherein the Bio-oil A is a non-hydrogenated plant oil comprising 10-16% Palmitic Acid, 40-50% Linoleic Acid, 8-16% Oleic Acid and 15-22% Stearic Acid of the total amount of fatty acid; and a Bio-oil B, wherein the bio-oil B is obtained from biomass pyrolysis and comprises 20% to 35% rosin acid; and wherein the ratio of Bio Oil A to Bio-Oil B, is in the range of 1:100 to 100:1.
  • the disclosure also provides a process of preparing
  • Figure 1 illustrates the effect of 5% rejuvenator on penetration of aged binder in accordance with an embodiment of the disclosure.
  • Figure 2 illustrates the effect of rejuvenator content on penetration of aged binder in accordance with an embodiment of the disclosure.
  • Figure 3 illustrates the effect of 5% rejuvenator on softening point of aged binder in accordance with an embodiment of the disclosure.
  • Figure 4 illustrates the effect of rejuvenator content on softening point of aged binder in accordance with an embodiment of the disclosure.
  • Figure 6 illustrates the effect of rejuvenator content on rutting behaviour of aged binder at 1.59 Hz frequency at different temperatures in accordance with an embodiment of the disclosure.
  • Figure 9 shows the Multiple Stress Creep Recovery Test curve at 3.2 kPa of Virgin Binder, aged binder, and rejuvenated binder with 2%, 4%, 6%, and 8% by weight rejuvenator content in accordance with an embodiment of the disclosure.
  • Figure 10 shows the Creep compliance value at 0.1 KPa of Virgin Binder, aged binder, and rejuvenated binder with 2%, 4%, 6%, and 8% by weight of the rejuvenator in accordance with an embodiment of the disclosure.
  • aggregate refers to particulate material suitable for use in asphalt. It generally comprises sand, gravel and crushed stone. Any conventional type of aggregates suitable for use in asphalt can be used. Examples of suitable aggregates include granite, lime stone, basalt, quartzite, gravel, and mixtures thereof.
  • Bitumen refers to a hydrocarbon based substance and includes both the naturally occurring bitumen and bitumen that is obtained from crude refining process.
  • bitumen refers to the coarse aggregates, such as stones, gravel, sand, and the like mixed with bitumen.
  • Bio-oil A is low in a range from 5.5 to 8.5 x 10 6 m 2 /s.
  • the flashpoint of Bio-Oil A is in a range from 180°C to 210°C to ensure transportation and storage at high temperature.
  • the specific gravity of Bio-Oil A is in a range from 0.92 to 1.1.
  • the saponification value of Bio-Oil A is in a range from 190 to 200.
  • the acid value of Bio-Oil A is in a range from 5 to 17.
  • Bio-oil A is essentially obtained from the oil-bearing seeds/plants and includes but is not limited to rapeseed oil, jatropha curcas oil, pongamia oil or castor oil. In accordance with an aspect the Bio-oil A is jatropha curcas oil.
  • the Bio-Oil B is a by product of kraft process of the wood paper pulp industry and is obtained from biomass pyrolysis and comprises between 20% to 35% of rosin acid. In addition 20% to 35% of rosin acid Bio-oil B it also comprises one or more fatty acids.
  • the Bio- Oil B has a specific gravity in a range from 0.95 to 0.99 and acid value in a range from 180 to 210.
  • the saponification value of Bio-Oil B is in a range from 190 to 200.
  • the value of unsaponifiables which includes all the fractions of a fatty substance which are barely soluble in aqueous solutions but are soluble in organic solvent is within a range from 190 to 220.
  • Bio-Oil B is distilled tall oil.
  • Bio oil B is distilled tall oil obtained from soft wood including but not limited to wood from pine or spruce tree having an acid value in a range of 185 to 205.
  • the ratio of Bio Oil A and Bio-Oil B in the rejuvenator is in a range of 1:100 to 100:1 vol/vol.
  • the ratio of Bio-oil A to Bio-oil B in the rejuvenator is is the range of 80:20vol/vol to 60:40 vol/vol.
  • the ratio of Bio-oil A to Bio-oil B is in a range of 70:30 vol/vol
  • rejuvenator has a specific gravity in a range from 0.91 to 0.98, moisture content in a range from 5% to 10 %, initial boiling point (5% mass) in a range from 200 to 210°C.
  • the kinematic viscosity of the rejuvenator at 135 °C is in a range from 4 x 10 6 m 2 /s to 6 x 10 6 m 2 /s.
  • the flash point of the rejuvenator is in a range from 185 °C to 220°C.
  • the density (g/cc at 15°C) is in a range from 0.91 gm/cc to 0.94 gm/cc.
  • the hot in-plant /central plant recycling process for preparing the paving composition comprises mixing together reclaimed asphalt pavement material having nominal aggregate size equal to or less than 37.5 mm, virgin/fresh aggregates, bitumen and rejuvenator, wherein the rejuvenator is added in reclaimed asphalt pavement material in such a way to ensure better diffusion in short span of time in drum or batch type hot mix plants.
  • Reclaimed asphalt pavement material is usually heated through (but not limited to) conductive heating while natural aggregates are super-heated to obtain resultant paving asphalt mix after mixing of all ingredients at a desired temperature.
  • the Reclaimed asphalt pavement material is heated to a temperature in the range of 130°C to 150°C.
  • the hot-in plant- recycling method comprises the steps of combining 30 to 80 w/w% Reclaimed Asphalt Pavement Material (RAP), 70 to 20 w/w% virgin aggregate, 2 to 4 w/w % fresh/virgin bitumen, and 2 to 6 w/w % rejuvenator by weight of residual asphalt content in the RAP.
  • RAP Reclaimed Asphalt Pavement Material
  • the rejuvenator is able to restore the softening point of aged bitumen binder.
  • rutting resistance factor decreases with increase in temperature.
  • the PAV aged binder shows high rutting resistance due to increased stiffness.
  • the parameter G*/sin5 describe the irrecoverable deformation of asphalt during loading.
  • the temperature sweep test was run with a temperature range of 40°C to 76 °C, at a frequency of 1.59Hz. it is observed that rutting resistance factor decreases with increase in temperature.
  • Rejuvenated binder with 4 % composite rejuvenator shows better rut resistance in comparison to virgin binder VG 30, in terms of higher G*/sin5 value on all temperature ranges. It indicates that the invented rejuvenator while reducing the stiffness of aged binder maintains higher rut resistance characteristics in comparison to virgin binder at elevated temperature ranges.
  • Example 3 Effect of inventive rejuvenator on reclaimed asphalt pavement mixtures
  • Trial mix blends with 30, 40 and 60 and 80 % RAP content were prepared by mixing the coarse and fine RAP with virgin aggregate and stone dust in such a manner that the resultant blend shall satisfy the stipulated gradation requirement for DBM grade II mix as prescribed in MoRTH specifications for Road and Bridge works, Vth revision.
  • the mix design was carried out using Marshall method of mix design for Hot Mix Recycling.
  • Optimum quantity of virgin bitumen to be added in the recycled mix is determined on the basis of the minimum binder content requirement as stipulated in MoRTH specification for DBM, grade II mix and various mix design parameters.
  • Rejuvenator was added in the virgin bitumen and mixed well at 1300°C temperatures through stirring to ensure uniform distribution.
  • Table 3 gives the properties of recycled bituminous mix with 30, 40 and 60 and 80 % RAP at optimum binder content without rejuvenator while Table 4 gives the properties of the recycled bituminous mix with 30, 40 and 60 and 80 % RAP with the rejuvenator.
  • RAP material obtained from GR-Infra project site at Varanasi ring road project.
  • RAP was extracted from the distressed bituminous layers of the same project site though cold milling process. Milled RAP were further subjected to screening and crushing at the project site for segregation as coarse and fine RAP and stockpiled separately at project site for utilization purpose.
  • Coarse RAP primary comprises the fraction 100% passing from 13.2 mm sieve while fine RAP consists of fraction 100 % passing from 9.5 mm sieve.
  • Coarse and fine RAP were subjected to sieve analysis to determine their gradation. Residual binder content in the RAP is determined through binder extraction test by carrying out quantitative separation of aggregate and bitumen. Virgin coarse natural aggregates, belonging from basaltic rock groups were obtained from the project site and used to meet out the gradation requirement. Table 8 gives the gradation of coarse and fine RAP along with residual binder content and moisture content:
  • bitumen Binder VG 40 bitumen binder is utilized to replenish the deficit binder content in the recycled mix bituminous mix. d.
  • Job mix for 40, 50 and 60 % RAP content is developed using Marshall method of mix design as stipulated in Asphalt Institute manual MS 20 for Hot Mix Recycling.
  • Job mix is prepared to carry out Hot-in-Plant Recycling using Marini batch type hot mix plant having hot/coarse and cold/fine RAP feeding capacity.
  • Total binder content in the recycled mix at 40 and 50 % rap content was kept 4.75 % by weight of mix while for 60 % RAP content job mix is prepared at 4.5 % total binder content by weight of mix.
  • Inventive Rejuvenator is added in the virgin bitumen and mixed well at 130° C temperatures through stirring to ensure uniform distribution.
  • Table 12 provides the job mix composition at variable RAP content along with the Marshall properties of recycled mix:
  • Table 12 Job Mix of Dense Graded Bituminous Mix-II with 40 , 50 and 60
  • Table 13 gives the penetration value of rejuvenated binder: Table :13 Properties of Rejuvenated binder h).
  • Indirect Tensile Strength Test Indirect tensile strength test is conducted under dry and wet conditions on marshall samples (2 no. each) casted through plant mix at the project site to determine the resistance against potential water damage.
  • Table 14 Indirect Tensile Strength under Dry and Wet conditions i ).
  • Resilient Modulus of Bituminous Cores with variable RAP Content M R tests on core samples as per ASTM D 4123-82 specification were performed in UTM machine. The resilient modulus (M R ) is defined as the elastic modulus based on recoverable strain under repeated load.
  • Table 15 provides the Resilient Modulus (Mr) Value of Samples.
  • Table 15 Resilient Modulus (Mr) Value of Samples
  • a rejuvenator for recycling asphalt comprising, a Bio-oil A, wherein the Bio oil A is a non-hydrogenated plant oil comprising 10-16% Palmitic Acid, 40-50% Linoleic Acid, 8-16% Oleic Acid and 15-22% Stearic Acid of the total amount of fatty acid, and, a Bio-oil B, wherein the bio-oil B is obtained from biomass pyrolysis and comprises 20% to 35% rosin acid, wherein the ratio of Bio Oil A to Bio-Oil B, is in the range of 1 : 100 to 100: 1.
  • Such rejuvenator(s) for recycling asphalt wherein the Bio-oil A is selected from a group of rapeseed oil, jatropha curcas oil, pongamia oil and castor oil.
  • Such rejuvenator(s) for recycling asphalt wherein the Bio-oil A is jatropha curcas oil.
  • Bio-oil B is a by-product of kraft process.
  • Such rejuvenator(s) for recycling asphalt wherein the Bio-oil B is distilled tail-oil.
  • Such rejuvenator(s) for recycling asphalt wherein the ratio of Bio-oil A to Bio-oil B is in a range of 80: 20 to 60:40 volume/volume of Bio-oil A: Bio-oil B.
  • Such rejuvenator(s) for recycling asphalt wherein the ratio of Bio-oil A to Bio-oil B is 70:30 vol/vol.
  • a paving composition comprising, 30 % to 80 % w/w reclaimed asphalt pavement (RAP) material, 70 % to 20 % w/w freshly crushed natural aggregates, 2% to 4 w/w % virgin bitumen and, 2% to 6% w/w % rejuvenator by weight of residual asphalt content in the reclaimed asphalt pavement (RAP), wherein the rejuvenator, comprises, a Bio-oil A, wherein the Bio-oil A is a non-hydrogenated plant oil comprising 10-16% Palmitic Acid, 40-50% Linoleic Acid, 8-16% Oleic Acid and 15-22% Stearic Acid of the total amount of fatty acid, and, a Bio-oil B, wherein the bio-oil B is obtained from biomass pyrolysis and comprises 20% to 35% rosin acid, wherein the ratio of Bio Oil A to Bio-Oil B, is in the range of 1:100 to 100:1.
  • RAP reclaimed asphalt pavement
  • a process of preparing a paving composition comprising mixing reclaimed asphalt pavement material having nominal aggregate size equal to or less than 37.5 mm; virgin aggregates, bitumen, rejuvenator and filler.
  • Such process(s) for preparing paving composition wherein the reclaimed asphalt pavement material is heated to a temperature in a range of 130 to 150° C and freshly crushed natural aggregates are heated to a temperature in the range of 150 to 190°C.
  • Recycling of asphalt pavements has the advantages of decreasing the demand for natural resources, in terms of natural aggregates and virgin bitumen required for resurfacing of bituminous pavement besides reducing the production of waste material generated during milling of bituminous layers while reducing the cost of construction. Desirably the amount of the Reclaimed Asphalt Pavement Material that is intended to be recycled is maximized and the amount of new material that is added to the recovered asphalt is minimized.
  • Reclaimed asphalt pavement can be recycled “in-place (i.e. at the road location) or can be recycled in-plant” (i.e. the RAP is removed from the road surface and transported to an asphalt mix plant).
  • the present disclosure provides an alternative rejuvenating agent, a resultant paving composition and has sought to provide an agent wherein at least a proportion of the agent is a natural product obtained through naturally renewable resources.
  • Incorporating a plant product instead of a petroleum product in asphalt recycling offers a potentially more sustainable product and may lead to price and supply advantages.
  • the natural-product based rejuvenating agent has the required technical properties and its use is safe and easy to handle.

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  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Structural Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention divulgue un régénérateur de recyclage d'asphalte. Le régénérateur comprend une bio-huile A, la bio-huile A étant une huile végétale non hydrogénée comprenant de 10 à 16 % d'acide palmitique, de 40 à 50 % d'acide linoléique, de 8 à 16 % d'acide oléique et de 15 à 22 % d'acide stéarique de la quantité totale d'acide gras ; et une bio-huile B, la bio-huile B étant obtenue à partir d'une pyrolyse de biomasse et comprenant de 20 % à 35 % d'acide de colophane ; le rapport de la bio-huile A à la bio-huile B s'inscrivant dans la plage de 1:100 à 100:1. L'invention divulgue également une composition de pavage et un procédé de préparation d'une composition de pavage qui comprend un matériau de revêtement d'asphalte régénéré.
EP22787735.4A 2021-04-13 2022-04-13 Régénérateur de recyclage de mélanges bitumineux vieillis Pending EP4392492A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202111017168 2021-04-13
PCT/IB2022/053466 WO2022219553A1 (fr) 2021-04-13 2022-04-13 Régénérateur de recyclage de mélanges bitumineux vieillis

Publications (1)

Publication Number Publication Date
EP4392492A1 true EP4392492A1 (fr) 2024-07-03

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ID=83640508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22787735.4A Pending EP4392492A1 (fr) 2021-04-13 2022-04-13 Régénérateur de recyclage de mélanges bitumineux vieillis

Country Status (2)

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EP (1) EP4392492A1 (fr)
WO (1) WO2022219553A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116103978B (zh) * 2023-02-16 2024-05-03 滨州市公路勘察设计院有限公司 基于废机油的老化沥青再生装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150005902A (ko) * 2012-04-26 2015-01-15 아리조나 케미칼 캄파니, 엘엘씨 폐아스팔트의 재생
US10570286B2 (en) * 2016-08-30 2020-02-25 Iowa State University Research Foundation, Inc. Asphalt products and methods of producing them for rejuvenation and softening of asphalt

Also Published As

Publication number Publication date
WO2022219553A1 (fr) 2022-10-20
WO2022219553A8 (fr) 2023-01-05

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