CN106752823B - 污水池混凝土构筑物的防腐防渗材料及其施工方法 - Google Patents
污水池混凝土构筑物的防腐防渗材料及其施工方法 Download PDFInfo
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Abstract
本发明涉及一种污水池混凝土构筑物的防腐防渗材料,该材料包括水性弹性涂料A和水性弹性涂料B,水性弹性涂料A与水性弹性涂料B的重量配比为3‑6:1;水性弹性涂料A包括以下重量份数的原料:聚氨酯60‑80、聚乙烯15‑25、聚三氟乙烯1‑10、硅酮1‑10;水性弹性涂料B包括以下重量份数的原料:异氰酸酯80‑100、叔碳酸5‑15。本发明使用简单、施工便捷,适用于各种基层材料,可在潮湿基层施工,且固化成连续一体的防护膜,具有良好的拉伸强度、断裂延伸率、耐老化性;耐酸、碱、盐、油以及有机溶剂和生物霉菌的侵蚀。
Description
技术领域
本发明属于建筑材料技术领域,特别是涉及一种污水池混凝土构筑物的防腐防渗材料及其施工方法。
背景技术
生活污水
生活污水的特征是水质比较稳定,但浑浊、深色且有恶臭,呈微碱性,一般不含有毒物质。由于生活污水很适宜于各种微生物的繁殖,因此常含有大量的细菌(包括病原菌)、病毒和寄生虫卵。生活污水所含固体物质约占0.1%~0.2%,其中溶解固体约占固体质量的60%~67%,主要是各种无机盐类和可溶性有机物质,而在其悬浮固体中有机成分几乎占75%以上,生活污水中含有氮、磷等营养物质。
工业污水
工业污水是指工业生产过程中排放出来的污水。由于工业类型、所用原料、生产工艺、用水水质和管理水平等的差异,各种工业废水的成分和性质差异极大。
工业废水中除冷却水等较为清洁的生产废水外,大都含有各种各样的污染物质;有的成分非常复杂,都需要经过适当的处理后才能排入水体或城市下水道系统。工业废水是造成水体污染的主要污染源,其中酚的含量较高且危害也大,所以这种废水常被称为酚废水。由于工业废水的成分和性质复杂,因此,不同的工业废水应给予不同的处理。
污水池构筑物裂缝分析
几乎所有的混凝土构件都存在裂缝,在规范中对于不同用途的混凝土构件所允许产生的裂缝都有明确规定,事实上混凝土构件都是带裂缝工作的。但裂缝宽度要控制在允许范围内,否则会给结构带来安全隐患,严重的还会对结构造成破坏。所以了解混凝土产生裂缝的原因,对于采取相应措施减少或控制污水池混凝土构筑物的裂缝是相当重要而且也是很有帮助的。
造成混凝土裂缝的原因很多,也相应复杂,其中比较主要的有以下几个方面:
(1)浇注时由于混凝土的渗水作用引起的沉缩与硬化过程中水泥浆水化造成的化学收缩和干缩(物理收缩)受到硬骨科的限制,因而在不同层次结合面的薄弱处形成许多随机分布的微裂缝,即在未受荷条件下的界面微裂缝。
(2)混凝土受压时,当超过30%~40%极限抗压强度、拉应力超过结合面粘结强度时,就会产生开裂。随着拉应力的不断增加,裂缝将继续产生、扩展。
(3)当混凝土承受可变的重复荷载作用时,混凝土构件会因严重开裂或变形过大而破坏,这种现象即是混凝土的疲劳破坏现象。
(4)混凝土在长期荷载作用下,内部微裂缝不断发展和增加,从而导致应变的增加。即混凝土因徐变而产生裂缝。
(5)混凝土的收缩和膨胀变形裂缝;混凝土在硬化过程中,体积会发生变化,当在空气硬化时,体积会收缩;在水中硬化时,体积要膨胀。
(6)浇注混凝土时产生的温度差,造成混凝土内部应力不均匀,也会产生裂缝。
我国污水处理厂混凝土构筑物由于盛液中含有大量的腐蚀性介质,以及由于施工等因素引起混凝土结构的连续性和密实性的缺陷,PH值大小,特别是在有温度情况下,会造成对混凝土结构的腐蚀及渗透对钢筋的腐蚀,甚至造成渗漏,从而影响混凝土结构的正常工作的状况。由于污水池渗漏,因此国家每年要花巨资进行防水堵漏,给国家造成了巨大的经济损失,并给人民生活、生产带来了许多不便,渗漏产生的原因是多方面的,据有关资料表明,材料是基础,材料质量不符合要求造成的渗漏占据26%;设计是前提,设计不合理造成的渗漏占22%;施工是关键,施工有误造成的渗漏占至46%;管理是保证,管理不善良造成的渗漏占6%。
通过对上述污水的成分和性质以及混凝土裂缝产生的原因分析可见,选择合适的防护材料非常重要。防护材料本身必须具备耐各种腐蚀性介质以及细菌的侵害,同时应对混凝土正常裂缝以及施工缝等具有较好的适应能力。另外,还应该具有施工方便、无毒无污染、造价合理等特点。
目前国内能满足以上要求的材料较少,常规防腐材料如树脂类材料、丙烯酸、氯化橡胶、氯磺化聚乙烯、环氧粉末、环氧酶沥青等材料的防腐性能单一,以及附着力差,脆性大,容易脱落等种种缺陷和不足。多年来,环氧煤沥青涂料是设计工程师常适用的材料,但多年的使用证明,该材料不能很好地满足防护要求。
发明内容
本发明的目的是提供污水池混凝土构筑物的防腐防渗材料及其施工方法,使用简单、施工便捷,适用于各种基层材料,可在潮湿基层施工,且固化成连续一体的防护膜,具有良好的拉伸强度、断裂延伸率、耐老化性;耐酸、碱、盐、油以及有机溶剂和生物霉菌的侵蚀。
本发明是这样实现的:
一种污水池混凝土构筑物的防腐防渗材料,该材料包括水性弹性涂料A和水性弹性涂料B,水性弹性涂料A与水性弹性涂料B的重量配比为3-6:1;水性弹性涂料A包括以下重量份数的原料:聚氨酯60-80、 聚乙烯15-25、聚三氟乙烯1-10 、硅酮1-10;水性弹性涂料B包括以下重量份数的原料:异氰酸酯80-100、叔碳酸5-15。
所述污水池混凝土构筑物的防腐防渗材料,其生产方法包括以下步骤:
①按重量份数依次将聚氨酯、 聚乙烯、聚三氟乙烯和硅酮投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料A;
②按重量份数将异氰酸酯和叔碳酸先后投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料B;
③按照水性弹性涂料A与水性弹性涂料B的重量配比3-6:1,采用机械配制或人工配制。
所述污水池混凝土构筑物的防腐防渗材料,其施工方法为:
(1)基层准备:表面压实压光,消除尖锐棱角、蜂窝麻面和起鼓裂纹;表面建筑垃圾、浮灰清除干净;阴、阳角做成半径大于20mm的圆弧;基层排除明水并清扫干净;
(2)取配制好的防腐防渗材料,采用喷机喷涂设备,使用220V单相电机,进行施工喷涂;
(3)取配制好的防腐防渗材料,采用人工涂刷:采用长板刷或圆型滚动刷涂刷,横坚交叉进行,使平面达到平整均匀、一致;
(4)施工前将配制好的防腐防渗材料搅拌均匀,涂装时每道涂层施工时间间隔为4小时,间隔时间不得超过24小时,施工使用的器具要清洁干燥;
(5)清洗:每次配料完毕及时用清水清洗配料桶及搅拌叶片等器具和设备,否则会影响下次配料的质量。
本发明的防腐防渗材料经过检测,主要性能指标见下表1:
表1 防腐防渗材料主要性能指标一览表
本发明的原理:
通过对聚氨酯树脂改性得到聚氨酯和聚乙烯共聚的软质树脂。这种树脂不含增塑剂各有特长,聚乙烯因主链无双键,所以稳定性、延伸性、耐候性、耐水性很好;聚三氟乙烯具有良好的耐酸、耐碱、耐盐、耐霉菌性能;叔碳酸用于和无机物固化剂反应并和树脂接枝的链接基团,特别是能和混凝土表面起到很强的粘结作用;硅酮具有极强的消泡、湿润作用,有利于液料系和粉体固化材料充分相溶,另外还具有很好的渗透能力。
本发明突出的实质性特点和显著的进步是:
1、本发明的防腐防渗材料是切实可行的防护措施,不仅能保证混凝土结构的正常工作,而且能延长混凝土结构的使用寿命;
2、适用于各种基层材料,可在潮湿基层施工,且固化成连续一体的防护膜,具有良好的拉伸强度、断裂延伸率、耐老化性;耐酸、碱、盐、油以及有机溶剂和生物霉菌的侵蚀;
3、有很强的渗透能力,在自身形成很好的防护膜同时,也在混凝土表面形成一道致密的防护层,混凝土碳化实验表明,28d后碳化深度为0;
4、涂料成膜后可在其表面直接涂抹水泥砂浆或粘贴瓷砖,且粘结牢固、不起鼓、不开裂;
5、本发明的防腐防渗材料主要适用于食品工业、生物工程、制药、自来水水厂等无毒环境的防腐,特别适用于工业和生活污水处理厂混凝土结构的防护、输水管道的防护,也适用于发电厂冷却塔内壁及垃圾填埋场混凝土结构的防腐防水;
6、本发明的防腐防渗材料是一种多组分高分子复合新型防腐材料,除了耐酸、碱、盐外,对其它多种腐蚀介质都有极好的防腐作用,而且还具有固结物无毒、耐霉菌,抗冲击力,抗土壤应力,阻止根系、耐海水、耐微生物、对环境无污染等特点,可广泛用于电力、石油化工、舰艇船舶、输油输气、军工装备、污水处理、供俳水管道及各种金属结构的防腐,各种性能指标都明显优于国内同类产品。
具体实施方式
实施例1
一种污水池混凝土构筑物的防腐防渗材料,水性弹性涂料A包括以下原料:聚氨酯60斤、 聚乙烯15斤、聚三氟乙烯1斤、硅酮1斤;水性弹性涂料B包括以下原料:异氰酸酯80斤、叔碳酸5斤。
其生产方法包括以下步骤:
①按重量份数依次将聚氨酯、 聚乙烯、聚三氟乙烯和硅酮投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料A;
②按重量份数将异氰酸酯和叔碳酸先后投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料B;
③按照水性弹性涂料A与水性弹性涂料B的重量配比4:1,把液料慢慢倒入配料桶中,并用搅拌器充分搅拌10mim以上,无气泡为止,搅拌时不得加入或混入上次搅拌的残液及其它杂质,配好的材料1h内必须用完。
实施例2
一种污水池混凝土构筑物的防腐防渗材料,水性弹性涂料A包括以下原料:聚氨酯70斤、 聚乙烯20斤、聚三氟乙烯5斤 、硅酮5斤;水性弹性涂料B包括以下原料:异氰酸酯90斤、叔碳酸10斤。
其生产方法包括以下步骤:
①按重量份数依次将聚氨酯、 聚乙烯、聚三氟乙烯和硅酮投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料A;
②按重量份数将异氰酸酯和叔碳酸先后投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料B;
③按照水性弹性涂料A与水性弹性涂料B的重量配比5:1,把液料慢慢倒入配料桶中,并用搅拌器充分搅拌10mim以上,无气泡为止,搅拌时不得加入或混入上次搅拌的残液及其它杂质,配好的材料1h内必须用完。
实施例3
一种污水池混凝土构筑物的防腐防渗材料,水性弹性涂料A包括以下原料:聚氨酯80斤、 聚乙烯25斤、聚三氟乙烯10 斤、硅酮10斤;水性弹性涂料B包括以下原料:异氰酸酯100斤、叔碳酸15斤。
其生产方法包括以下步骤:
①按重量份数依次将聚氨酯、 聚乙烯、聚三氟乙烯和硅酮投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料A;
②按重量份数将异氰酸酯和叔碳酸先后投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料B;
③按照水性弹性涂料A与水性弹性涂料B的重量配比6:1,把液料慢慢倒入配料桶中,并用搅拌器充分搅拌10mim以上,无气泡为止,搅拌时不得加入或混入上次搅拌的残液及其它杂质,配好的材料1h内必须用完。
按实施例1-3配制得到的防腐防渗材料的施工方法为:
(1)基层准备:表面压实压光,消除尖锐棱角、蜂窝麻面和起鼓裂纹;表面建筑垃圾、浮灰清除干净;阴、阳角做成半径大于20mm的圆弧;基层排除明水并清扫干净;
(2)取配制好的防腐防渗材料,采用喷机喷涂设备,使用220V单相电机,进行施工喷涂;
(3)取配制好的防腐防渗材料,采用人工涂刷:采用长板刷或圆型滚动刷涂刷,横坚交叉进行,使平面达到平整均匀、一致;
(4)施工前将配制好的防腐防渗材料搅拌均匀,涂装时每道涂层施工时间间隔为4小时,间隔时间不得超过24小时,施工使用的器具要清洁干燥;
(5)清洗:每次配料完毕及时用清水清洗配料桶及搅拌叶片等器具和设备,否则会影响下次配料的质量。
Claims (2)
1.一种污水池混凝土构筑物的防腐防渗材料,其特征在于,该材料由水性弹性涂料A和水性弹性涂料B组成,水性弹性涂料A与水性弹性涂料B的重量配比为3-6:1;水性弹性涂料A由以下重量份数的原料组成:聚氨酯60-80、 聚乙烯15-25、聚三氟乙烯1-10 、硅酮1-10;水性弹性涂料B由以下重量份数的原料组成:异氰酸酯80-100、叔碳酸5-15;
其生产方法包括以下步骤:
①按重量份数依次将聚氨酯、 聚乙烯、聚三氟乙烯和硅酮投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料A;
②按重量份数将异氰酸酯和叔碳酸先后投放到加热反应釜中,加热到70℃并开启搅拌,30分钟后停止加热搅拌,静放15分钟后即可包装得到水性弹性涂料B;
③按照水性弹性涂料A与水性弹性涂料B的重量配比3-6:1,采用机械配制或人工配制。
2.根据权利要求1所述污水池混凝土构筑物的防腐防渗材料,其特征在于,其施工方法为:
(1)基层准备:表面压实压光,消除尖锐棱角、蜂窝麻面和起鼓裂纹;表面建筑垃圾、浮灰清除干净;阴、阳角做成半径大于20mm的圆弧;基层排除明水并清扫干净;
(2)取配制好的防腐防渗材料,采用喷机喷涂设备,使用220V单相电机,进行施工喷涂;
(3)取配制好的防腐防渗材料,采用人工涂刷:采用长板刷或圆型滚动刷涂刷,横坚交叉进行,使平面达到平整均匀、一致;
(4)施工前将配制好的防腐防渗材料搅拌均匀,涂装时每道涂层施工时间间隔为4小时,间隔时间不得超过24小时,施工使用的器具要清洁干燥;
(5)清洗:每次配料完毕及时用清水清洗配料桶及搅拌叶片,否则会影响下次配料的质量。
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