CN101643584A - Modified emulsified asphalt with excellent temperature adaptability and preparation method thereof - Google Patents
Modified emulsified asphalt with excellent temperature adaptability and preparation method thereof Download PDFInfo
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Abstract
The invention relates to modified emulsified asphalt with excellent temperature adaptability and a preparation method thereof. The modified emulsified asphalt with excellent temperature adaptability is characterized by comprising the following components in percentage by weight: 50-60 modified asphalt, 4-10 composite emulsifier, 0.2-1 stabilizer, 0-2 pH value regulator and 31-40 water. The prepared modified emulsified asphalt has the advantages of excellent temperature adaptability and storage stability and good concrete suitability.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of modified emulsifying asphalt and preparation method thereof.
Background technology
The high-speed railway Line for Passenger Transportation is the important directions of China's transport development development.The plate-type ballastless track system has precision height, stability and the good advantage of recoverability, partly is made up of pre-track plate, cement asphalt mortar layer, track plate base etc.Cement asphalt mortar is the key components of plate-type ballastless track, a kind of organic/inorganic composite material of forming and form through the glued sclerosis of hydrated cementitious and the acting in conjunction of emulsified bitumen breakdown of emulsion film forming by multiple materials such as cement, emulsified bitumens, have high temperature sensitivity owing to containing a large amount of pitch in its hardenite structure, so its key ingredient emulsified bitumen will directly have influence on the temperature sensitivity of cement asphalt mortar to the adaptability of temperature.China's weather has tangible typical regional characters simultaneously: the Northeast's severe cold; South China's sweltering heat; North China, Central China, sweltering heat in summer, winter are very cold again, therefore for to satisfy China's climatic characteristic complicated and changeable, need develop a kind of excellent temperature adaptability emulsified bitumen.
The plain asphalt emulsification that the at present existing used emulsified bitumen employing of cement asphalt mortar penetration degree is 40 (0.1mm)～140 (0.1mm) gets, and its evaporation residue softening temperature is low, low-temperature ductility is low, can't satisfy the weather condition of China's complexity.In traffic and building trade, for improving the bitumen emulsion thermal adaptability, the general employing mixed preparation modified emulsifying asphalt in the common emulsified asphalt with styrene butadiene block copolymer (SBS) latex or the agent of styrene-butadiene rubber(SBR) (SBR) latex modified, it is relatively poor to adopt in the bitumen emulsion that the preparation technology of this " first emulsification; post-modification " obtains properties-correcting agent to mix uniformity with pitch, and be difficult to produce chemically crosslinked between them, therefore it is very limited the asphalt temperature stability to be improved effect, the softening temperature of its evaporation residue is difficult to reach more than 70 ℃, and 5 ℃ of ductilities are difficult to satisfy summer high temperature and winter severe cold area to the bituminous user demand less than 20cm.The bitumen emulsion technology of preparing of " first modification, back emulsification " is also arranged at present, and this technology adopts SBS properties-correcting agent to prepare modifying asphalt, carries out emulsification then.Increase along with SBS properties-correcting agent volume, bituminous thermal adaptability scope broadens, but later stage emulsive difficulty increases greatly, mainly is that the pitch Heating temperature is too high when preparing emulsified bitumen, will make the serious vaporization of soap lye when causing heated bitumen to mix with soap lye with emulsification and be difficult to uniformly emulsify.Therefore prior art only can be no more than the SBS volume 3% modifying asphalt emulsification at the most.Meanwhile, in order to adapt to the technology of preparing requirement of CA mortar, also require the bitumen emulsion of preparation to have the characteristics good with the cement adaptability.
Summary of the invention
The object of the present invention is to provide a kind of modified emulsified asphalt with excellent temperature adaptability and preparation method thereof, this modified emulsifying asphalt have the adaptive temperature difference big, have excellent storage stability, with the good characteristics of cement adaptability.
To achieve these goals, technical scheme of the present invention is: a kind of modified emulsified asphalt with excellent temperature adaptability, it is characterized in that it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, the weight part of each ingredients constitute is: 50～60 parts of modifying asphalts, 4～10 parts of compound emulsifying agents, 0.2～1 part of stablizer, 0～2 part of pH value conditioning agent, 31～40 parts in water.
Described modifying asphalt is styrene butadiene block copolymer (SBS) modifying asphalt, the volume of styrene butadiene block copolymer (SBS) is 3.5%～6% of an asphalt quality, and it is that 55%～65% (quality), density are 1.000g/cm that the wax content of described modifying asphalt divides total content less than 2.2% (quality), saturated branch with fragrance
3～1.025g/cm
3
Described compound emulsifying agent is cationic emulsifier or anionic emulsifier and nonionic emulsifying agent is composite gets, and the weight of cationic emulsifier or anionic emulsifier is (1～4) with the ratio of the weight of nonionic emulsifying agent: 1; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 10～18; Described cationic emulsifier is any one or the mixing more than two kinds in quaternary ammonium salt, polyamines class, positively charged ion tetrahydroglyoxaline, the aminated lignin, is any proportioning when mixing more than two kinds; Described anionic emulsifier is the mixing of a kind of in alkylbenzene sulfonate, the alkylsulfonate or two kinds, and two kinds is any proportioning when mixing; Described nonionic emulsifying agent is any one or the mixing more than two kinds in polyoxyethylene sorbitan monooleate (Tween80), polyoxyethylene sorbitan trioleate (Tween85), alkylphenol-polyethenoxy (10) ether (OP-10), is any proportioning when mixing more than two kinds.Nonionic emulsifying agent and cationic emulsifier or anionic emulsifier recombination energy strengthen the emulsifying capacity of cationic emulsifier or anionic emulsifier, improve the storage stability of emulsion, reduce the emulsification cost, can regulate the breakdown of emulsion time of emulsified bitumen simultaneously, improve adaptability with cement.
Described stablizer is the mixing of any one or two kinds in inorganic stabilizers, the macromolecule stabilizer, and two kinds is any proportioning when mixing; Described inorganic stabilizers is ammonium chloride or calcium chloride; Described macromolecule stabilizer is a kind of in polyvinyl alcohol, gelatin, the ether of cellulose.Inorganic stabilizers increases mutual repulsive force by regulating the ion-conductance potential difference of pitch particle electrostatic double layer on every side, increases the stability of emulsified bitumen; The affiliation that adds of macromolecule stabilizer forms colloidal solution, increases the system viscosity, the coalescent speed of slowing down pitch particle, and at pitch particle surface formation protective membrane, because space steric effect makes pitch particle be in good dispersion state.
Described pH value conditioning agent is a kind of in hydrochloric acid, phosphoric acid, sodium hydroxide, the potassium hydroxide.The ionic strength and the emulsifying effectiveness of composite emulsifying agent solution regulated in the pH regulator agent by the potential of hydrogen of regulating emulsion.
Described water is common drinking water.
The preparation method of above-mentioned a kind of modified emulsified asphalt with excellent temperature adaptability is characterized in that it comprises the steps:
1) preparation compound emulsifying agent: the weight of press cationic emulsifier or anionic emulsifier is (1～4) with the ratio of the weight of nonionic emulsifying agent: 1, choose cationic emulsifier or anionic emulsifier, nonionic emulsifying agent, cationic emulsifier or anionic emulsifier are mixed with nonionic emulsifying agent, obtain compound emulsifying agent;
2) weight part by each ingredients constitute is: 50～60 parts of modifying asphalts, 4～10 parts of compound emulsifying agents, 0.2～1 part of stablizer, 0～2 part of pH value conditioning agent, 31～40 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, standby;
3) heat water to 40 ℃～70 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 50 ℃～70 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 170 ℃～190 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
The speed of grinding plate of described colloidal mill is 8000r/min～11000r/min, and the pressure-controlling of colloidal mill is at 0.2MPa～0.6MPa.
The invention has the beneficial effects as follows: the modified emulsifying asphalt that the present invention makes, it has excellent storage stability, good with cement adaptability, the evaporation residue softening temperature is greater than 70 ℃, 5 ℃ of ductilities are greater than 20cm, can adapt to that (summer, the ground average maximum air temperature was 76 ℃, winter, the Xia Redong of temperature on average-22 ℃ was cold) the high-performance weather resistance cement asphalt mortar preparation of high temperature difference area (is that the modified emulsifying asphalt that the present invention makes has the big characteristics of adaptive temperature difference,-22 ℃～76 ℃), also can be used for the excellent temperature adaptability emulsified bitumen of the preparation of other regional high-performance cement bituminous mortars.
The key technical index of the modified emulsified asphalt with excellent temperature adaptability that the present invention makes:
1, stability in storage (5d):＜5.0%;
2, cement adaptability: cationic emulsified bitumen, residuum on the sieve＜1%;
Flow out volume of sample＞70ml in the anionic emulsified bitumen, mixture 20s;
3, evaporation residue: softening temperature (ring and ball method)＞70 ℃;
Ductility (5 ℃)＞20mm.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of modified emulsified asphalt with excellent temperature adaptability, it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and the weight part of each ingredients constitute is: 50 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.3 part of stablizer, 1.1 parts of pH value conditioning agents, 38.6 parts in water.
Described modifying asphalt is styrene butadiene block copolymer (SBS) modifying asphalt, the volume of styrene butadiene block copolymer (SBS) is 4% of an asphalt quality, and the wax content of described modifying asphalt is that 2.0% (quality), saturated branch are that 60% (quality), density are 1.01g/cm with fragrance branch total content
3
Described compound emulsifying agent is a cationic emulsifier and nonionic emulsifying agent is composite gets, and the weight of cationic emulsifier or anionic emulsifier is 1.5 with the ratio of the weight of nonionic emulsifying agent: 6 parts of 1{ positively charged ion tetrahydroglyoxalines, 4 parts of polyoxyethylene sorbitan trioleates }; Described cationic emulsifier is positively charged ion tetrahydroglyoxaline (Qinhuangdao triumph chemical industry company limited, a positively charged ion tetrahydroglyoxaline); Described nonionic emulsifying agent is polyoxyethylene sorbitan trioleate (Jiangyin City China first chemical industry company limited, a polysorbate85); The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 10;
Described is 0.1 part in 0.2 part of ammonium chloride (Shanghai brilliance chemistry chemical reagent work, ammonium chloride) and gelatin (the golden arrow gelatin of Cangzhou City company limited, technical gelatine).
Described pH value conditioning agent is that concentration is 1.1 parts of 37% concentrated hydrochloric acids (Shanghai brilliance chemistry chemical reagent work, concentrated hydrochloric acid).Described water is common drinking water.
The preparation method of above-mentioned a kind of modified emulsified asphalt with excellent temperature adaptability, it comprises the steps:
1) preparation compound emulsifying agent: the ratio by the weight of cationic emulsifier and the weight of nonionic emulsifying agent is 1.5: 1, chooses cationic emulsifier, nonionic emulsifying agent, and cationic emulsifier is mixed with nonionic emulsifying agent, obtains compound emulsifying agent;
2) weight part by each ingredients constitute is: 50 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.3 part of stablizer, 1.1 parts of pH value conditioning agents, 38.6 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and standby;
3) heat water to 50 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 60 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 180 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
The speed of grinding plate of described colloidal mill is 9000r/min, and the pressure-controlling of colloidal mill is at 0.9MPa.
The performance index of the modified emulsified asphalt with excellent temperature adaptability of preparation see Table 1.The evaporation residue softening temperature is greater than 70 ℃, and 5 ℃ of ductilities are greater than 20cm, can adapt to (summer 76 ℃ of ground average maximum air temperatures, winter, the Xia Redong of temperature on average-22 ℃ was cold) high temperature difference area high-performance weather resistance cement asphalt mortar preparation.Cement adaptability is 0.3%, and it is good to illustrate with cement adaptability.Stability in storage (5d)/% is 1.5, illustrates that it has excellent storage stability.
Embodiment 2:
A kind of modified emulsified asphalt with excellent temperature adaptability, it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and the weight part of each ingredients constitute is: 50 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.2 part of stablizer, 2 parts of pH value conditioning agents, 37.8 parts in water.
Described modifying asphalt is styrene butadiene block copolymer (SBS) modifying asphalt, the volume of styrene butadiene block copolymer (SBS) is 5% of an asphalt quality, and the wax content of described modifying asphalt is that 1.7% (quality), saturated branch are that 55% (quality), density are 1.000g/cm with fragrance branch total content
3
Described compound emulsifying agent is an anionic emulsifier and nonionic emulsifying agent is composite gets, and the weight of anionic emulsifier is 7 with the ratio of the weight of nonionic emulsifying agent: 7 parts of 3{ Sodium dodecylbenzene sulfonatees, 3 parts in alkylphenol-polyethenoxy (10) ether }; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 11.4; Described anionic emulsifier is Sodium dodecylbenzene sulfonate (reviving as chemical industry company limited, Sodium dodecylbenzene sulfonate in Nanjing); Described nonionic emulsifying agent be alkylphenol-polyethenoxy (10) ether (OP-10) (the honest chemical industry in Shanghai, OP-10).
Described stablizer is ether of cellulose (fluffy trade Co., Ltd is moistened in Shanghai, ether of cellulose MF4).Described pH value conditioning agent is sodium hydroxide (Shanghai brilliance chemistry chemical reagent work, a sodium hydroxide).Described water is common drinking water.
The preparation method of above-mentioned a kind of modified emulsified asphalt with excellent temperature adaptability, it comprises the steps:
1) preparation compound emulsifying agent: the ratio by the weight of anionic emulsifier and the weight of nonionic emulsifying agent is 7: 3, chooses anionic emulsifier, nonionic emulsifying agent, and anionic emulsifier is mixed with nonionic emulsifying agent, obtains compound emulsifying agent;
2) weight part by each ingredients constitute is: 50 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.2 part of stablizer, 2 parts of pH value conditioning agents, 37.8 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and standby;
3) heat water to 70 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 70 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 190 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
The speed of grinding plate of described colloidal mill is 9000r/min, and the pressure-controlling of colloidal mill is at 0.5MPa.
The performance index of the modified emulsified asphalt with excellent temperature adaptability of preparation see Table 1.The evaporation residue softening temperature is greater than 70 ℃, and 5 ℃ of ductilities are greater than 20cm, can adapt to (summer 76 ℃ of ground average maximum air temperatures, winter, the Xia Redong of temperature on average-22 ℃ was cold) high temperature difference area high-performance weather resistance cement asphalt mortar preparation.Cement adaptability is 210ml, and it is good to illustrate with cement adaptability.Stability in storage (5d)/% is 1.3, illustrates that it has excellent storage stability.
Table 1, the performance of the modified emulsified asphalt with excellent temperature adaptability of embodiment 1, embodiment 2
Annotate: "
*" expression percentage ratio, "
*" the expression volume.
As known from Table 1, the modified emulsified asphalt with excellent temperature adaptability that makes of embodiment 1, embodiment 2 have the adaptive temperature difference big, have excellent storage stability, with the good characteristics of cement adaptability.
Embodiment 3:
Substantially the same manner as Example 1, difference is: the weight part of each ingredients constitute is: 57.6 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.3 part of stablizer, 1.1 parts of pH value conditioning agents, 31 parts in water.
Embodiment 4:
Substantially the same manner as Example 2, difference is: the weight part of each ingredients constitute is: 57.6 parts of modifying asphalts, 10 parts of compound emulsifying agents, 0.3 part of stablizer, 1.1 parts of pH value conditioning agents, 31 parts in water.
Embodiment 5:
A kind of modified emulsified asphalt with excellent temperature adaptability, it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and the weight part of each ingredients constitute is: 60 parts of modifying asphalts, 8.7 parts of compound emulsifying agents, 0.2 part of stablizer, 0.1 part of pH value conditioning agent, 31 parts in water.
Described modifying asphalt is styrene butadiene block copolymer (SBS) modifying asphalt, the volume of styrene butadiene block copolymer (SBS) is 3.5%% of an asphalt quality, and the wax content of described modifying asphalt is that 2.1% (quality), saturated branch are that 55% (quality), density are 1.000g/cm with fragrance branch total content
3
Described compound emulsifying agent is a cationic emulsifier and nonionic emulsifying agent is composite gets, and the weight of cationic emulsifier is 1: 1 with the ratio of the weight of nonionic emulsifying agent; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 15.3; Described cationic emulsifier is a palmityl trimethyl ammonium chloride; Described nonionic emulsifying agent is polyoxyethylene sorbitan monooleate (Tween80).
Described stablizer is inorganic stabilizers and macromolecule stabilizer, the weight proportion during two kinds of mixing 1: 1; Described inorganic stabilizers is an ammonium chloride; Described macromolecule stabilizer is polyvinyl alcohol (molecular weight is 59400).
Described pH value conditioning agent is a phosphoric acid.
The preparation method of above-mentioned a kind of modified emulsified asphalt with excellent temperature adaptability, it comprises the steps:
1) preparation compound emulsifying agent: the ratio by the weight of cationic emulsifier and the weight of nonionic emulsifying agent is 1: 1, chooses cationic emulsifier, nonionic emulsifying agent, and cationic emulsifier is mixed with nonionic emulsifying agent, obtains compound emulsifying agent;
2) weight part by each ingredients constitute is: 60 parts of modifying asphalts, 8.7 parts of compound emulsifying agents, 0.2 part of stablizer, 0.1 part of pH value conditioning agent, 31 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and standby;
3) heat water to 40 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 50 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 170 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
The speed of grinding plate of described colloidal mill is 8000r/min, and the pressure-controlling of colloidal mill is at 0.2MPa.
The technical indicator of the modified emulsified asphalt with excellent temperature adaptability that makes: 1, stability in storage (5d):＜5.0%; 2, cement adaptability: cationic emulsified bitumen, residuum on the sieve＜1%; 3, evaporation residue: softening temperature (ring and ball method)＞70 ℃; Ductility (5 ℃)＞20mm.
Embodiment 6:
A kind of modified emulsified asphalt with excellent temperature adaptability, it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and the weight part of each ingredients constitute is: 53 parts of modifying asphalts, 4 parts of compound emulsifying agents, 1 part of stablizer, 2 parts of pH value conditioning agents, 40 parts in water.
Described modifying asphalt is styrene butadiene block copolymer (SBS) modifying asphalt, the volume of styrene butadiene block copolymer (SBS) is 6% of an asphalt quality, and the wax content of described modifying asphalt is that 1.7% (quality), saturated branch are that 65% (quality), density are 1.025g/cm with fragrance branch total content
3
Described compound emulsifying agent is an anionic emulsifier and nonionic emulsifying agent is composite gets, and the weight of anionic emulsifier is 4: 1 with the ratio of the weight of nonionic emulsifying agent; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 16.4; Described anionic emulsifier is a sodium laurylsulfonate; Described nonionic emulsifying agent is polyoxyethylene sorbitan trioleate (Tween85).
Described stablizer is inorganic stabilizers and macromolecule stabilizer, the weight proportion during two kinds of mixing 1: 1; Described inorganic stabilizers is a calcium chloride; Described macromolecule stabilizer is an ether of cellulose.
Described pH value conditioning agent is a potassium hydroxide.
The preparation method of above-mentioned a kind of modified emulsified asphalt with excellent temperature adaptability, it comprises the steps:
1) preparation compound emulsifying agent: the ratio by the weight of anionic emulsifier and the weight of nonionic emulsifying agent is 4: 1, chooses anionic emulsifier, nonionic emulsifying agent, and anionic emulsifier is mixed with nonionic emulsifying agent, obtains compound emulsifying agent;
2) weight part by each ingredients constitute is: 53 parts of modifying asphalts, 4 parts of compound emulsifying agents, 1 part of stablizer, 2 parts of pH value conditioning agents, 40 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, and standby;
3) heat water to 70 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 70 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 190 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
The speed of grinding plate of described colloidal mill is 11000r/min, and the pressure-controlling of colloidal mill is at 0.6MPa.
The technical indicator of the modified emulsified asphalt with excellent temperature adaptability that makes: 1, stability in storage (5d):＜5.0%; 2, cement adaptability: cationic emulsified bitumen, residuum on the sieve＜1%; 3, evaporation residue: softening temperature (ring and ball method)＞70 ℃; Ductility (5 ℃)＞20mm.
Comparing embodiment 1～comparing embodiment 7: the emulsified bitumen performance such as the table 2 of all kinds of compound emulsifying agent preparations.Modifying asphalt SBS volume is 3.5% (account for asphalt quality than) in the table 2, and the bituminous wax content is 1.8%, saturated branch and fragrance divide that total content is 65%, density 1.025g/cm
3The shared weight part of each raw material is in emulsified bitumen: 55 parts of modifying asphalts, stablizer polyvinyl alcohol (Shanghai brilliance chemistry chemical reagent work, polyvinyl alcohol) 0.2 part, 37% concentrated hydrochloric acid (Shanghai brilliance chemistry chemical reagent work, concentrated hydrochloric acid) (cationic emulsified bitumen) or NaOH (Shanghai brilliance chemistry chemical reagent work, sodium hydroxide) (anionic emulsified bitumen) 0.8 part, 170 ℃ of modifying asphalt Heating temperatures, 60 ℃ of soap lye Heating temperatures, colloidal mill speed of grinding plate 8000r/min, colloidal mill system pressure 0.2Mpa.
The emulsified bitumen basic mechanical design feature of table 2 different emulsifiers
Annotate: "
*" expression percentage ratio, "
*" the expression volume.
As shown in Table 2, emulsified bitumen and cement adaptability are relatively poor when being used alone emulsifying agent, can not satisfy code requirement, need cationic emulsifier or anionic emulsifier and nonionic emulsifying agent composite.
Comparing embodiment 8～comparing embodiment 13: when modifying asphalt SBS volume improves, the modifying asphalt Heating temperature will improve when reaching identical viscosities, therefore needing to improve colloidal mill shearing rate while colloidal mill system pressure will increase, and to improve the boiling point of soap lye, prevent to gasify in the soap lye emulsion process.
Table 3 has been listed adulteration modified asphalt emulsification processing parameter of different SBS and technical feature.The modifying asphalt wax content of SBS volume 4% is 1.7% in the table 3, to divide content 62%, density with fragrance be 1.015g/cm to saturated branch
3, the modifying asphalt wax content of SBS volume 5% is 1.0%, saturated branch and fragrance divide that content is 58%, density is 1.005g/cm
3, the modifying asphalt wax content of SBS volume 6% is 1.0%, saturated branch and fragrance divide that content is 55%, density is 1.000g/cm
3For cationic emulsified bitumen, the shared weight part of each starting material is: 60 parts of pitches, compound emulsifying agent positively charged ion tetrahydroglyoxaline (Qinhuangdao triumph chemical industry company limited, the positively charged ion tetrahydroglyoxaline) with oxygen ethene sorbitan trioleate (Jiangyin City China first chemical industry company limited, polysorbate85) ratio is 3: 1, weight part sees Table 2,1 part of 1mol/L phosphoric acid (Shanghai brilliance chemistry chemical reagent work, strong phosphoric acid), CaCl
2(Shanghai brilliance chemistry chemical reagent work, calcium chloride) 0.2 part, water are 34.3 parts, 33.3 parts and 31.8 parts.For anionic emulsified bitumen, the shared weight part of each starting material is: (revive as chemical industry company limited in Nanjing for 60 parts of asphalt contents, compound emulsifying agent Sodium dodecylbenzene sulfonate, Sodium dodecylbenzene sulfonate) with oxygen ethene sorbitan trioleate (Jiangyin City China first chemical industry company limited, polysorbate85) ratio is 3: 1, weight part sees Table 2, potassium hydroxide (Shanghai brilliance chemistry chemical reagent work, potassium hydroxide) 1 part of 1 part, polyvinyl alcohol (Shanghai brilliance chemistry chemical reagent work, polyvinyl alcohol), water be 33.5 parts, 32.5 parts with 31 parts.
The different SBS volume of table 3 emulsified bitumen significant parameter
Annotate: "
*" expression percentage ratio, "
*" the expression volume.
The bound value and the interval value of each raw material of the present invention can both be realized the present invention, just do not enumerate embodiment one by one at this; Each concrete raw material of compound emulsifying agent of the present invention, stablizer, pH value conditioning agent can both be realized the present invention, does not just enumerate embodiment one by one at this; Each processing parameter of the present invention (as temperature, pressure etc.) can both be realized the present invention, does not just enumerate embodiment one by one at this.
Claims (10)
1. modified emulsified asphalt with excellent temperature adaptability, it is characterized in that it is made up of modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, the weight part of each ingredients constitute is: 50～60 parts of modifying asphalts, 4～10 parts of compound emulsifying agents, 0.2～1 part of stablizer, 0～2 part of pH value conditioning agent, 31～40 parts in water.
2. a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 1, it is characterized in that: described modifying asphalt is the styrene butadiene block copolymer modifying asphalt, and the volume of styrene butadiene block copolymer is 3.5%～6% of an asphalt quality.
3. a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 1, it is characterized in that: described compound emulsifying agent is cationic emulsifier or anionic emulsifier and nonionic emulsifying agent is composite gets, and the weight of cationic emulsifier or anionic emulsifier is (1～4) with the ratio of the weight of nonionic emulsifying agent: 1; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 10～18; Described cationic emulsifier is any one or the mixing more than two kinds in quaternary ammonium salt, polyamines class, positively charged ion tetrahydroglyoxaline, the aminated lignin, is any proportioning when mixing more than two kinds; Described anionic emulsifier is the mixing of a kind of in alkylbenzene sulfonate, the alkylsulfonate or two kinds, and two kinds is any proportioning when mixing; Described nonionic emulsifying agent is any one or the mixing more than two kinds in polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan trioleate, alkylphenol-polyethenoxy (10) ether, is any proportioning when mixing more than two kinds.
4. a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 1 is characterized in that: described stablizer is the mixing of any one or two kinds in inorganic stabilizers, the macromolecule stabilizer, and two kinds is any proportioning when mixing; Described inorganic stabilizers is ammonium chloride or calcium chloride; Described macromolecule stabilizer is a kind of in polyvinyl alcohol, gelatin, the ether of cellulose.
5. a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 1 is characterized in that: described pH value conditioning agent is a kind of in hydrochloric acid, phosphoric acid, sodium hydroxide, the potassium hydroxide.
6. the preparation method of a kind of modified emulsified asphalt with excellent temperature adaptability as claimed in claim 1 is characterized in that it comprises the steps:
1) preparation compound emulsifying agent: the weight of press cationic emulsifier or anionic emulsifier is (1～4) with the ratio of the weight of nonionic emulsifying agent: 1, choose cationic emulsifier or anionic emulsifier, nonionic emulsifying agent, cationic emulsifier or anionic emulsifier are mixed with nonionic emulsifying agent, obtain compound emulsifying agent;
2) weight part by each ingredients constitute is: 50～60 parts of modifying asphalts, 4～10 parts of compound emulsifying agents, 0.2～1 part of stablizer, 0～2 part of pH value conditioning agent, 31～40 parts in water, choose modifying asphalt, compound emulsifying agent, stablizer, pH value conditioning agent and water, standby;
3) heat water to 40 ℃～70 ℃ after, join in the Soap liquid pot, add pH regulator agent, compound emulsifying agent and stablizer again, and stir and to make pH regulator agent, compound emulsifying agent and stablizer dissolving, the temperature in the Soap liquid pot is controlled at 50 ℃～70 ℃, obtains soap lye;
4) modifying asphalt is joined in the asphalt tank, be heated to 170 ℃～190 ℃, obtain heat modification pitch;
5) connect colloidal mill and make soap lye and heat modification pitch enter mill simultaneously, high speed shear and dispersion through the colloidal mill mill from the effusive emulsion of colloidal mill mill, are modified emulsified asphalt with excellent temperature adaptability.
7. the preparation method of a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 6, it is characterized in that: described modifying asphalt is the styrene butadiene block copolymer modifying asphalt, and the volume of styrene butadiene block copolymer is 3.5%～6% of an asphalt quality.
8. the preparation method of a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 6, it is characterized in that: described compound emulsifying agent is cationic emulsifier or anionic emulsifier and nonionic emulsifying agent is composite gets, and the weight of cationic emulsifier or anionic emulsifier is (1～4) with the ratio of the weight of nonionic emulsifying agent: 1; The hydrophile-lipophile balance value of compound emulsifying agent (HLB value) is 10～18; Described cationic emulsifier is any one or the mixing more than two kinds in quaternary ammonium salt, polyamines class, positively charged ion tetrahydroglyoxaline, the aminated lignin, is any proportioning when mixing more than two kinds; Described anionic emulsifier is the mixing of a kind of in alkylbenzene sulfonate, the alkylsulfonate or two kinds, and two kinds is any proportioning when mixing; Described nonionic emulsifying agent is any one or the mixing more than two kinds in polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan trioleate, alkylphenol-polyethenoxy (10) ether, is any proportioning when mixing more than two kinds.
9. the preparation method of a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 6 is characterized in that: described stablizer is the mixing of any one or two kinds in inorganic stabilizers, the macromolecule stabilizer, and two kinds is any proportioning when mixing; Described inorganic stabilizers is ammonium chloride or calcium chloride; Described macromolecule stabilizer is a kind of in polyvinyl alcohol, gelatin, the ether of cellulose.
10. the preparation method of a kind of modified emulsified asphalt with excellent temperature adaptability according to claim 6, it is characterized in that: the speed of grinding plate of described colloidal mill is 8000r/min～11000r/min, and the pressure-controlling of colloidal mill is at 0.2MPa～0.6MPa.
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