胶粉改性沥青排放物采样及定量分析方法

doi:10.13229/j.cnki.jdxbgxb.20221576

Abstract

Abstract:

Crumb rubber modified asphalt（CRMA） has technical advantages in terms of cost saving， performance enhancement， etc. However， CRMA produces a large amount of harmful gases during pavement construction， and it is urgent to quantitatively analyze the emissions of CRMA. In this paper， a method for sampling CRMA emissions was developed， and gas chromatograph-mass spectrometer （GC-MS） with internal standard method was used to quantitatively analyze the chemical compositions of CRMA emissions. The main conclusions are as follows. The standard recovery rate is good， and there is no adsorption breakthrough during the process of emissions collection. The standard curves of different concentration range have good linear relationships. The addition of crumb rubber significantly increases the emission of benzene series， benzothiazole， trimethyl dihydroquinoline and other CRMA characteristic emissions. Compared with neat asphalt， the emission of n-alkanes from CRMA decreases. The emission of PAHs from CRMA is similar to that from neat asphalt. Naphthalene is the main component of the PAHs released from CRMA and neat asphalt.

Key words: road engineering, crumb rubber modified asphalt, characteristic emission, gas chromatograph-mass spectrometer （GC-MS）, internal standard method

CLC Number:

U414

Hong-zhou ZHU,Chun-li SU,Nai-peng TANG,Jun-yao WEI,Hong-jun SUN. Sampling and quantitative analysis method of emissions from crumb rubber modified asphalt[J].Journal of Jilin University(Engineering and Technology Edition), 2024, 54(10): 2922-2929.

Figures/Tables 10

Table 1

Table 2

Fig.1

Table 3

Summary of emission standard curve information"

待测物	$R l o w 2$	$R h i g h 2$	检出限/（mg?m^-3）	定量限/（mg?m^-3）	保留时间/min
甲苯	0.990 5	0.997 6	0.002 0	0.006 7	3.905
乙苯对二甲苯间二甲苯	0.998 8	0.993 5	0.003 7	0.012 2	5.764
苯乙烯	0.998 7	0.997 5	0.005 1	0.016 9	6.376
邻二甲苯	0.997 2	0.997 4	0.013 6	0.045 3	6.288
苯并噻唑	0.999 6	0.994 5	0.006 3	0.021 1	15.626
二氢喹啉	0.998 9	0.996 0	0.093 2	0.310 6	24.932
二环己基二硫化物	0.999 2	0.999 2	0.344 8	1.149 4	34.962
对苯二胺	0.994 8	0.997 6	0.157 9	0.526 3	40.070
2-氟联苯	0.997 7	0.993 5	0.001 3	0.004 2	20.511
C8	0.998 9	0.998 9	0.020 3	0.067 6	4.342
C9	0.999 2	0.999 2	0.004 5	0.015 0	6.453
C10	0.999 2	0.999 2	0.001 8	0.006 1	9.153
C11	0.998 4	0.998 9	0.000 4	0.001 2	12.085
C12	0.998 5	0.999 0	0.000 4	0.001 2	14.967
C13	0.997 7	0.999 0	0.000 5	0.001 8	18.024
C14	0.995 6	0.999 1	0.001 1	0.003 5	22.664
C15	0.996 1	0.999 2	0.000 2	0.000 7	28.550
C16	0.995 7	0.998 6	0.001 0	0.003 3	30.677
C17	0.991 9	0.995 4	0.000 5	0.001 8	31.257
C18	0.996 9	0.997 4	0.000 9	0.002 9	33.055
C19	0.996 2	0.996 9	0.001 6	0.005 4	33.767
C20	0.996 2	0.996 9	0.001 1	0.003 5	34.207
C21	0.993 4	0.997 0	0.001 7	0.005 5	37.760
C22	0.995 6	0.997 8	0.002 3	0.007 7	38.692
C23	0.995 1	0.995 1	0.006 2	0.020 6	39.574
C24	0.997 5	0.997 5	0.007 4	0.024 7	40.417
C25	0.996 2	0.998 9	0.010 2	0.034 1	41.213
萘	0.997 6	0.998 6	0.001 2	0.003 9	14.535
苊烯	0.996 2	0.998 5	0.003 3	0.011 0	27.363
苊	0.997	0.998 7	0.003 9	0.012 9	27.747
芴	0.995 5	0.998 8	0.001 9	0.006 3	30.677
菲	0.997 2	0.998 9	0.000 7	0.002 4	31.257
蒽	0.995 5	0.998 9	0.001 8	0.005 9	34.455
荧蒽	0.996 1	0.998 8	0.001 4	0.004 6	37.569
芘	0.995 6	0.998 7	0.001 3	0.004 2	38.157
苯并［a］蒽	0.993 1	0.995 1	0.002 2	0.007 3	41.123
屈	0.993 4	0.997 1	0.002 2	0.007 3	41.248
苯并［k］荧蒽苯并［b］荧蒽	0.995 8	0.992 8	0.034 7	0.115 8	43.608
苯并［a］芘	0.993 3	0.992	0.003 7	0.012 3	44.233
茚［1，2，3-cd］芘二苯并［a，h］蒽	0.998 2	0.994 4	0.036 5	0.121 7	46.481
苯并［g，h，i］苝	0.998 1	0.997 6	0.030 9	0.103 1	46.943

Table 3

Fig.2

Fig.3

Table 4

Fig.4

Fig.5

Fig.6

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	软化点/℃	5 ℃延度/cm	针入度/0.1 mm
基质沥青	46.7	8.7	76.7
改性沥青	70.2	11.7	33.4

	低浓度梯度	高浓度梯度
苯系物	0.01、0.05、0.1、0.2、0.5、1、2	0.5、1、2、5、10、25、50
PAHs与替代物	0.01、0.05、0.1、0.2、0.5、1、2	0.2、0.5、1、2、5、10、25
正构烷烃	0.01、0.05、0.1、0.2、0.5、1、2	0.5、1、2、5、10、25、50
胶粉特征排放物	0.01、0.05、0.1、0.2、0.5、1、2、5	1、2、5、10、25、50、100

替代物	替代物掺量/μg	回收率/%			平均回收率/%	RSD/%
替代物	替代物掺量/μg	样品1	样品2	样品3	平均回收率/%	RSD/%
2-氟联苯	10	95.45	90.20	99.64	95.10	4.97
2-氟联苯	2	98.33	96.04	96.45	96.94	1.26

Sampling and quantitative analysis method of emissions from crumb rubber modified asphalt

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