共查询到19条相似文献,搜索用时 265 毫秒
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塔河油SBR改性沥青生产技术的开发与应用 总被引:1,自引:0,他引:1
通过制备丁苯橡胶母液或直接加入一添加特制的化学交联剂工艺,开发出了符合交通部JTGF40--2004聚合物改性沥青技术要求的SBR类改性道路沥青产品,考察了主要工艺条件对改性沥青性质的影响,加入交联剂可有效提高改性沥青的粘韧性和韧性及使用性能。按照美国SHRP胶结料性能评价体系以及交通部《公路沥青路面施工技术规范》,分别对工业生产的塔河油SBR改性沥青及其混合料进行了性能评价,结果表明,塔河油SBR改性沥青混合料性能符合所有气候分区的要求,性能等级符合PG76—28级别,具有较好的高低温性能和抗水损害以及抗疲劳开裂等性能。 相似文献
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研究了多聚磷酸复配SBR改性沥青的复配条件及工艺。考察了交联剂,增塑剂,制备工艺对沥青高低温性能,粘韧性,韧性的影响。结果表明,增塑剂能够提高沥青的抗老化性,但对粘韧性和韧性产生负影响。交联剂能够提高沥青的粘韧性,韧性,但会降低沥青的低温延度,在丁苯橡胶用量较大时,适当的制作工艺能显著改善沥青老化后的低温延度。 相似文献
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通常以丁二烯和苯乙烯为单体经低温(5℃)乳液聚合的SBR为改性剂,制得的改性沥青具有优良的耐低温性能、延展性能等特点,但是,在一定量的添加范围内,其粘韧性、韧性往往达不到交通运输部JTG F40—2004《公路沥青路面施工技术规范》中聚合物SBR类改性沥青的指标要求,为此,研究开发了接枝交联SBR。进行了接枝交联SBR改性道路沥青试验,结果表明,在相同添加量试验条件下,接枝交联SBR改性沥青与未接枝的SBR改性沥青相比,其粘韧性、韧性、热储存稳定性和抗老化性等指标都有大幅度的提高。 相似文献
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SBR胶乳改性沥青机理的研究 总被引:2,自引:0,他引:2
选取了国内外十一种沥青为基础沥青,将SBR胶乳按不同的比例加入其中制备成改性沥青。观察微观结构,拍摄微观照片,以SBR在沥青中的相态结构作为评价沥青与SBR之间相容性的依据,并通过测定各种性能研究了沥青与SBR的相容性,沥青对SBR的敏感性和改性效果之间的关系。 相似文献
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丁苯胶乳改性乳化沥青的制备及其性能 总被引:1,自引:1,他引:0
以克拉玛依90号重交通道路沥青为基质沥青,采用丁苯(SBR)胶乳为改性剂,分别筛选了三种不同种类的乳化剂及稳定剂制备SBR改性乳化沥青,对制备中影响SBR改性乳化沥青性能的因素进行了考察,并测试了SBR改性乳化沥青的存储稳定性及其它性能。结果表明,采用乳化和改性同时进行的工艺,在乳化溶液pH值为5~6、油温120℃、水温60℃的条件下,按油水质量比5:5、B乳化剂1.0%、SBR胶乳3%(干基)、氯化铵0.20%的组分质量配比制备的改性乳化沥青达到交通部JTGF40-2004的质量要求。采用复合乳化剂可节省乳化剂用量约30%。 相似文献
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《Petroleum Science and Technology》2013,31(10):1187-1194
Abstract A dose of SBR modifier added to asphalt can improve asphalt's performance in stability, permanence, viscosity, and resistance to aging. Better application performances of asphalt pavement are affected directly by proper SBR modifying. This paper shows some investigations that confirm the relationship between the addition of SBR with the structure and the properties of SBR-modified asphalt. This paper also discusses the modified asphalt high temperature property, low temperature ductility, and mechanism of SBR-modified asphalt. The addition of SBR modifier showed an increase in viscosity, softening point, and elastic recovery of modified asphalt with rising temperature. When the temperature rises, the improvement of SBR-modified asphalt in softening point, elastic recovery, and visco-toughness result from SBR cross-linking. Although the lengths of low temperature ductility of SBR-modified asphalt are increased, the viscosities of modified asphalt increase; however, the softening point between the upper layer and lower layer were about 1.8°C after the isolated experiment. 相似文献
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Yufeng Cong Kejian Liao Wei Huang Yuchun Zhai 《Petroleum Science and Technology》2006,24(10):1187-1194
A dose of SBR modifier added to asphalt can improve asphalt's performance in stability, permanence, viscosity, and resistance to aging. Better application performances of asphalt pavement are affected directly by proper SBR modifying. This paper shows some investigations that confirm the relationship between the addition of SBR with the structure and the properties of SBR-modified asphalt. This paper also discusses the modified asphalt high temperature property, low temperature ductility, and mechanism of SBR-modified asphalt. The addition of SBR modifier showed an increase in viscosity, softening point, and elastic recovery of modified asphalt with rising temperature. When the temperature rises, the improvement of SBR-modified asphalt in softening point, elastic recovery, and visco-toughness result from SBR cross-linking. Although the lengths of low temperature ductility of SBR-modified asphalt are increased, the viscosities of modified asphalt increase; however, the softening point between the upper layer and lower layer were about 1.8°C after the isolated experiment. 相似文献
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用SBR对呼炼的100号道路石油沥青进行了改性试验研究。100号道路石油沥青中加入适量的SBR改性剂后,沥青的质量有了明显改善,主要指标达到了日本橡胶沥青的规格要求和GB/T15180高等级道路沥青的技术要求。 相似文献
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油浆调合沥青SBS改性研究 总被引:1,自引:1,他引:0
催化裂化油浆富含芳香分,是理想的道路沥青调合组分。以SBS为改性剂、油浆和渣油调合沥青作为基质沥青制备SBS改性沥青,利用FCC油浆蒸馏所得馏分油作为相容剂对SBS进行预溶胀,同时利用蒸馏所得的残油调节改性沥青的针入度,并对油浆调合SBS改性沥青的性能进行评价。结果表明:催化裂化油浆蒸馏馏分油对SBS具有较好的溶胀能力,经过溶胀后SBS的分散性能显著改善,直接利用机械搅拌即可获得分散均匀、储存稳定的SBS改性沥青;当SBS用量为4.5%(w)时,油浆与渣油的调合沥青通过机械搅拌工艺可制备出符合JTG F40—2004标准的SBS改性沥青。 相似文献