CN107225820A - 一种易熔型高聚物改性沥青防水卷材及其制备方法 - Google Patents
一种易熔型高聚物改性沥青防水卷材及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种易熔型高聚物改性沥青防水卷材及其制备方法。本发明的防水卷材从上至下依次包括:上表面细砂保护层、上表面改性沥青层、聚酯胎基层,下表面改性沥青层及下表面细砂保护层;其特征在于,所述上表面改性沥青层和所述下表面改性沥青层所用材料均为易熔型高聚物改性沥青,所述易熔型高聚物改性沥青是由以下重量份的组分组成:石油沥青38‑42份,天然沥青12‑15份,环烷油5‑10份,弹性体改性剂8‑11份,塑性体改性剂3‑5份,其他改性剂3‑5份,防老剂0.5‑1.5份,重钙18‑22份,增稠剂3‑6份。本发明的防水卷材施工温度降低,只需要1500℃‑2000℃,提高了施工效率,节约燃料,保护环境。
Description
技术领域
本发明涉及建筑材料领域,尤其涉及一种易熔型高聚物改性沥青防水卷材及其制备方法。
背景技术
高聚物改性沥青防水卷材是一种用于铁路桥梁有咋、无咋混凝土桥面有保护层的防水层的高聚物改性沥青卷材,其耐高低温性能优异,拉力延伸等其他性能远高于普通卷材。目前,高聚物改性沥青防水卷材需要热熔工法施工才能将其发挥出预期的防水效果。现有改性沥青防水卷材绝大多数都只是在结构上和功能上进行创新,并未对改性沥青在施工性能上进行改进与提升。而现有改性沥青防水卷材在施工时需要采用天然气,甲烷等不可再生燃料燃烧进行热熔施工,施工温度往往需要保持在2000~3000℃,这种施工方式消耗大量的化石燃料,势必造成对资源的浪费。与此同时普通高聚物改性沥青防水卷材耐热性达到115℃不流淌不滴落,必然需要更高的施工温度。
随着我国对环境保护日益严格的形势,如何在实际施工过程中减少能源消耗,降低污染物排放和提高施工效率,同时又可保证防水卷材的物理性能和防水效果显得至关重要。
发明内容
有鉴于此,本发明实施例提供了一种易熔型高聚物改性沥青防水卷材及其制备方法,主要目的是解决防水卷材施工热熔温度较高的问题。
为达到上述目的,本发明主要提供了如下技术方案:
一方面,本发明实施例提供了一种易熔型高聚物改性沥青防水卷材,从防水卷材与空气接触的一面至所述防水卷材与施工基层接触的一面依次包括:上表面细砂保护层、上表面改性沥青层、聚酯胎基层,下表面改性沥青层及下表面细砂保护层;所述上表面改性沥青层和所述下表面改性沥青层所用材料均为易熔型高聚物改性沥青,所述易熔型高聚物改性沥青是由以下重量份的组分组成:
作为优选,所述聚酯胎基层的克重为350g/m2-380g/m2,所述聚酯胎基层的厚度为1.6mm-2.2mm。
作为优选,所述聚酯胎基层的材料选用长丝聚酯无纺布。
作为优选,所述上表面细砂保护层和所述下表面细砂保护层所用的细砂均为30目-50目粒径的河沙。
作为优选,所述石油沥青为环烷基直馏石油沥青,针入度为200-240,以0.1mm计;所述天然沥青为含沥青质相对较高的天然湖沥青。
作为优选,所述弹性体改性剂为化学结构为星型结构的苯乙烯-丁二烯-苯乙烯,牌号为T161B;所述塑性体改性剂为无规聚丙烯。
作为优选,所述其他改性剂是粒径为60目-80目的废旧轮胎胶粉;所述防老剂为水杨酸苯酯;所述增稠剂是粒径为200目的凹凸棒土。
另一方面,本发明实施例提供可上述易熔型高聚物改性沥青防水卷材的制备方法,包括:烘干聚酯胎基层,将所述聚酯胎基经过预浸油池,浸透胎基,再过烘干辊,然后进入涂油池,将易熔型高聚物改性沥青涂覆于已被浸透的聚酯胎基上,形成上表面改性沥青层和下表面改性沥青层;对上表面改性沥青层和下表面改性沥青层定厚,在上表面改性沥青层与下表面改性沥青层的表面分别覆盖细砂以形成上表面细砂层与下表面细砂层,最后冷却卷材并卷取包装;其中,所述易熔型高聚物改性沥青的制备方法包括:
按原料配方准备各原料;
将石油沥青、天然沥青及环烷油混合并加热到120-140℃,形成混合沥青;
向所述混合沥青中依次加入弹性体改性剂、塑性体改性剂及其他改性剂,继续升温至180℃-190℃并保温60min,开启胶体磨加速溶胀过程,形成混合改性剂;
待所述混合沥青完全通过胶体磨,所述混合改性剂完全融入所述混合沥青后,在180℃-200℃温度下继续搅拌60min,形成初始改性沥青;
向所述初始改性沥青中加入增稠剂、防老化剂及重钙,在180℃-190℃温度下搅拌60min后所得产物为易熔型高聚物改性沥青。
与现有技术相比,本发明的有益效果是:
本发明的易熔型高聚物改性沥青防水卷材施工温度只需要1500~2000℃,极大地节约了能源消耗,同时易熔型高聚物改性沥青涂层中添加了无机增稠剂,可提高改性沥青的粘度和软化点,有助于改性沥青的生产与施工速率的提高,是提高热熔效率的主要手段。
本发明的易熔型高聚物改性沥青防水卷材可提高施工速率10-20%,节约燃料15%-30%节能环保,并且使用寿命长久。
本发明的易熔型高聚物改性沥青防水卷材在施工上具有易熔,粘接牢固,自强,在结构上能适应基层小幅变形,同时具有较高的尺寸稳定性的特点,尤其在应用时可提高施工效率减少并降低能源消耗,具有良好的经济效益和社会效益。
附图说明:
图1为本发明实施例1提供的易熔型高聚物改性沥青防水卷材的结构示意图;
图2为本发明实施例1提供的易熔型高聚物改性沥青防水卷材的制备工艺流程图。
具体实施方式
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下以较佳实施例,对依据本发明申请的具体实施方式、技术方案、特征及其功效,详细说明如后。下述说明中的多个实施例中的特定特征、结构、或特点可由任何合适形式组合。
实施例1
按原料配方准备以下原料:38份石油沥青,12份天然沥青,5份环烷油,8份苯乙烯-丁二烯-苯乙烯(SBS,牌号T161B),3份无规聚丙烯(APP),3份废旧轮胎胶粉,0.5份水杨酸苯酯,18份重钙,3份200目凹凸棒土;
将上述石油沥青、上述天然沥青及上述环烷油混合并加热到120℃,形成混合沥青;向混合沥青中依次加入SBS、APP及废旧轮胎胶粉,继续升温至180℃并保温60min,开启胶体磨加速溶胀过程,形成混合改性剂;待混合沥青完全通过胶体磨,混合改性剂完全融入混合沥青后,在180℃温度下继续搅拌60min,形成初始改性沥青;向初始改性沥青中加入水杨酸苯酯和凹凸棒土还有重钙,在180℃温度下搅拌60min后所得产物即为易熔型高聚物改性沥青。
实施例2
按原料配方准备以下原料:40份石油沥青,12份天然沥青,8份环烷油,9份苯乙烯-丁二烯-苯乙烯(SBS,牌号T161B),3份无规聚丙烯(APP),4份废旧轮胎胶粉,1份水杨酸苯酯,18份重钙,3份200目凹凸棒土;
将上述石油沥青、上述天然沥青及上述环烷油混合并加热到125℃,形成混合沥青;向混合沥青中依次加入SBS、APP及废旧轮胎胶粉,继续升温至180℃并保温60min,开启胶体磨加速溶胀过程,形成混合改性剂;待混合沥青完全通过胶体磨,混合改性剂完全融入混合沥青后,在192℃温度下继续搅拌60min,形成初始改性沥青;向初始改性沥青中加入水杨酸苯酯和凹凸棒土还有重钙,在186℃温度下搅拌60min后所得产物即为易熔型高聚物改性沥青。
实施例3
按原料配方准备以下原料:42份石油沥青,15份天然沥青,10份环烷油,11份苯乙烯-丁二烯-苯乙烯(SBS,牌号T161B),5份无规聚丙烯(APP),5份废旧轮胎胶粉,1.5份水杨酸苯酯,22份重钙,6份200目凹凸棒土;
将上述石油沥青、上述天然沥青及上述环烷油混合并加热到125℃,形成混合沥青;向混合沥青中依次加入SBS、APP及废旧轮胎胶粉,继续升温至180℃并保温60min,开启胶体磨加速溶胀过程,形成混合改性剂;待混合沥青完全通过胶体磨,混合改性剂完全融入混合沥青后,在192℃温度下继续搅拌60min,形成初始改性沥青;向初始改性沥青中加入水杨酸苯酯和凹凸棒土还有重钙,在186℃温度下搅拌60min后所得产物即为易熔型高聚物改性沥青。
实施例4
选择克重为350g/m2且厚度为1.6mm的聚酯胎基,将聚酯胎基层3展开,缓慢通过胎基烘干器烘干聚酯胎基层以达到烘干胎基中水分的目的,烘干温度控制在185℃,将聚酯胎基经过预浸油池,浸透胎基,预浸油温度控制在185℃,在聚酯胎基完全浸透后通过烘干辊,然后进入涂油池,将实施例1制备的易熔型高聚物改性沥青涂覆于已被浸透的聚酯胎基上,涂油温度控制在190℃,形成上表面改性沥青层2和下表面改性沥青层4;对上表面改性沥青层和下表面改性沥青层通过定厚辊进行定厚,在上表面改性沥青层与下表面改性沥青层的表面分别覆盖细砂以形成上表面细砂层1与下表面细砂层5,最后冷过冷却辊使其冷却,然后进入卷取机进行卷取、包装;制备过程参见图2,防水卷材结构参见图1。
实施例5
本实施例5的制备过程与实施例4不同之处在于,将实施例2制备的易熔型高聚物改性沥青涂覆于已被浸透的聚酯胎基上;制备过程参见图2,防水卷材结构参见图1。
实施例6
本实施例6的制备过程与实施例4不同之处在于,将实施例3制备的易熔型高聚物改性沥青涂覆于已被浸透的聚酯胎基上;制备过程参见图2,防水卷材结构参见图1。
对实施例4-实施例6制备的易熔型高聚物改性防水卷材的性能进行检测,如表1所示。
表1.防水卷材性能检测结果
序号 | 实施例4、实施例5、实施例6 | 技术要求 |
1 | 耐热性 | 115℃,不流淌,不滴落 |
2 | 低温柔性 | -30℃,无裂缝 |
3 | 不透水性 | 0.4MPa,2h,不透水 |
4 | 抗穿孔性 | 不渗水 |
5 | 剪切状态下的粘合性 | ≥10.0N/mm或卷材破坏 |
6 | 保护层混凝土与防水卷材粘结强度 | ≥0.2MPa |
7 | 热老化处理 | 低温柔性:-25℃,无裂缝 |
8 | 人工气候加速老化 | 低温柔性:720h,-25℃,无裂缝 |
9 | 耐化学侵蚀 | 低温柔性:-25℃,无裂缝 |
由表1可知,本发明实施例4-实施例6制备的防水卷材的性能均达标。
本发明中易熔型高聚物改性沥青防水卷材中所用的天然沥青含沥青质相对较高,提高了最终产品的耐老化性能。
本发明中易熔型高聚物改性沥青防水卷材中采用化学结构为星型SBS-T161B提供了优越的耐老化性能。
本发明中易熔型高聚物改性沥青防水卷材中采用其他改性剂补充弹性体改性剂不足,与弹性体改性剂达到协同效果,同时能够降低成本。
本发明中易熔型高聚物改性沥青防水卷材中防老化剂用于提高改性沥青防水卷材的抗老化性能。
本发明中易熔型高聚物改性沥青防水卷材中增稠剂用于大大提高改性沥青的稠度且优化各种改性剂之间的联系,提高了产品的韧性,降低了混合料的流动性能。因而在保证卷材耐热性指标的同时,降低改性沥青混合料的熔点。
本发明的易熔型高聚物改性沥青防水卷材施工温度只需要1500℃-2000℃,极大地节约了能源消耗;同时易熔型高聚物改性沥青涂层中添加了无机增稠剂,可提高改性沥青的粘度和软化点,有助于改性沥青的生产与施工速率的提高,是提高热熔效率的主要手段。上述实施例证明,本发明的易熔型高聚物改性沥青防水卷材可提高施工速率10-20%,节约燃料15%-30%节能环保,并且使用寿命长久。
本发明的易熔型高聚物改性沥青防水卷材在施工上具有易熔,粘接牢固,自强,在结构上能适应基层小幅变形,同时具有较高的尺寸稳定性的特点,尤其在应用时可提高施工效率减少并降低能源消耗,具有良好的经济效益和社会效益。
本发明实施例中未尽之处,本领域技术人员均可从现有技术中选用。
以上公开的仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以上述权利要求的保护范围为准。
Claims (8)
1.一种易熔型高聚物改性沥青防水卷材,从防水卷材与空气接触的一面至所述防水卷材与施工基层接触的一面依次包括:上表面细砂保护层、上表面改性沥青层、聚酯胎基层,下表面改性沥青层及下表面细砂保护层;其特征在于,所述上表面改性沥青层和所述下表面改性沥青层所用材料均为易熔型高聚物改性沥青,所述易熔型高聚物改性沥青是由以下重量份的组分组成:
2.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述聚酯胎基层的克重为350g/m2-380g/m2,所述聚酯胎基层的厚度为1.6mm-2.2mm。
3.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述聚酯胎基层的材料选用长丝聚酯无纺布。
4.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述上表面细砂保护层和所述下表面细砂保护层所用的细砂均为30目-50目粒径的河沙。
5.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述石油沥青为环烷基直馏石油沥青,针入度为200-240,以0.1mm计;所述天然沥青为含沥青质相对较高的天然湖沥青。
6.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述弹性体改性剂为化学结构为星型结构的苯乙烯-丁二烯-苯乙烯,牌号为T161B;所述塑性体改性剂为无规聚丙烯。
7.根据权利要求1所述的一种易熔型高聚物改性沥青防水卷材,其特征在于,所述其他改性剂是粒径为60目-80目的废旧轮胎胶粉;所述防老剂为水杨酸苯酯;所述增稠剂是粒径为200目的凹凸棒土。
8.一种易熔型高聚物改性沥青防水卷材的制备方法,包括:烘干聚酯胎基层,将所述聚酯胎基经过预浸油池,浸透胎基,再过烘干辊,然后进入涂油池,将易熔型高聚物改性沥青涂覆于已被浸透的聚酯胎基上,形成上表面改性沥青层和下表面改性沥青层;对上表面改性沥青层和下表面改性沥青层定厚,在上表面改性沥青层与下表面改性沥青层的表面分别覆盖细砂以形成上表面细砂层与下表面细砂层,最后冷却卷材并卷取包装;其特征在于,所述易熔型高聚物改性沥青的制备方法包括:
按原料配方准备各原料;
将石油沥青、天然沥青及环烷油混合并加热到120-140℃,形成混合沥青;
向所述混合沥青中依次加入弹性体改性剂、塑性体改性剂及其他改性剂,继续升温至180℃-190℃并保温60min,开启胶体磨加速溶胀过程,形成混合改性剂;
待所述混合沥青完全通过胶体磨,所述混合改性剂完全融入所述混合沥青后,在180℃-200℃温度下继续搅拌60min,形成初始改性沥青;
向所述初始改性沥青中加入增稠剂、防老化剂及重钙,在180℃-190℃温度下搅拌60min后所得产物为易熔型高聚物改性沥青。
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