CN100560528C - 液体水泥助磨增强剂及其生产方法 - Google Patents
液体水泥助磨增强剂及其生产方法 Download PDFInfo
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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Abstract
本发明涉及一种液体水泥助磨增强剂及其生产方法,特别涉及一种消泡机制和水泥安定性能的高效液体复合无氯低碱水泥助磨增强剂及生产方法。采用纸浆废液作为主要原料,与三乙醇胺、多元醇络合,添加少量磷石膏、硫酸铝等安定剂消除游离态的CaO的危害,加入十六烷醇等起消泡作用,提高水泥的稳定性和密实性,能进一步提高水泥强度。生产方法将助磨增强成份和助剂成份分别均匀分散后,再一起搅拌混合而成。产品易于储存运输、工艺简单、价格低廉,以占水泥掺入量低,对水泥早后期强度均有显著地提高,非常适合在水泥行业广泛应用。
Description
技术领域
本发明涉及一种液体水泥助磨添加剂及其生产方法,涉及一种无氯低碱高效复合增强型液体水泥助磨剂,特别涉及到一种水泥流动性和消泡活性、水泥安定性能的改良水泥添加剂及生产方法。
背景技术
节能降耗和提高水泥质量是我国水泥工业长期而重要的任务。水泥生产过程中破碎和粉磨环节是整个生产环节中消耗能源最高的,通过推广和选用合适的水泥助磨添加剂是可以大幅度提高水泥粉磨效率,降低电耗,提高了水泥的强度,降低水泥生产过程中熟料的使用量,加大工业废弃物的利用量,改善了水泥性能,从而提高水泥产业的经济效益。
目前常用的水泥助磨剂包括粉煤灰、氯化钠、硬脂酸盐、三乙醇胺等成份。最近国家水泥标准规定水泥中的氯离子含量不能大于0.06%,限定对碱的用量要求,严格禁止使用对水泥性能有害和有损人体健康的化学成分生产水泥添加剂,且水泥添加剂的掺入量必须小于水泥重量的0.5%,因此传统的以氯化钠和高碱等为主的粉体增强型助磨剂将停止使用。而且传统的助磨剂虽然使水泥早期强度有所提高,但后期强度较差,需要开发多功能、复合高效、对人体和水泥产品没有副作用的新型水泥助磨剂。为了提高水泥的强度和质量,满足施工环境的复杂要求和易施工性等方面要求,一般需要在助磨剂中使用其他助剂。近年来液体助磨剂由于效果显著、添加量少而越受到重视,比如发明200610037601.5公开了一种添加尿素的多功能液体水泥助磨剂,其原料主要为多种有效助磨物质和少量的早强剂等,但这种助磨剂会影响到混凝土中的氨释放量,后期强度得不到保证。
发明内容
本发明的目的是提供一种液体水泥助磨剂,在发挥助磨功效和不损害水泥早期强度的同时,提高水泥后期强度和耐用性。
本发明的发明者发现,含有纸浆废液的组合物可与几种多元醇联用作水泥助磨剂,特别是与烷醇和链烷二醇络合时,可以矫正或大大地减少已知助磨剂的缺点,而不会失去有益效果。本发明以这些发现作为根据由以下技术方案予以实现:本发明用工业纸浆废液为母液,成份还包括:早强剂、多元醇、消泡剂、安定剂、阻锈剂、防开裂剂。其重量百分比含量为:母液50-70%,早强剂2-10%,多元醇2-15%,消泡剂0.5-2%,安定剂0.5-5%,阻锈剂1-2%,防开裂剂为0-1%。本发明中所叙的早强剂为三乙醇胺,多元醇成份由乙二醇、丙二醇、丙三醇、二乙二醇中的两种或两种以上组成;消泡剂为十六烷醇;安定剂为磷石膏和硫酸铝混合物;阻锈剂为亚硝酸钙和丙烯基硫脲的混合物,防开裂剂为2-甲基-2,4-戊二醇。
本助磨剂的制备方法分为三个步骤:
(1)首先,将采纸浆废液、三乙醇胺和乙二醇、丙二醇、丙三醇、二乙二醇中的2种或两种以上组合成份加入到反应器中,在30-60℃下进行充分搅拌1-2小时,得到均匀混合物A;
(2)将2-甲基-2,4-戊二醇、十六烷醇、硫酸铝、磷石膏、亚硝酸钙、丙烯基硫脲在适量水中搅拌0.5-1小时,制备混合物B;
(3)将混合物A加热到50-60℃,边搅拌边缓慢倒入混合物B,均匀混合、充分搅拌1小时,即可得到一种不易沉淀的棕色液体水泥助磨增强剂。
本发明加入三乙醇胺是起助磨、不起静电减少磨机内物料的凝聚和糊球的作用;磷石膏、硫酸铝作为安定剂消除水泥中游离态的CaO的危害;加入十六烷醇起消泡作用,提高水泥的密实度和强度;纸浆废液中的木质素磺酸盐可以调节水泥砂浆的流动度;亚硝酸钙和丙烯基硫脲能防止混凝土对钢筋的腐蚀。
与传统助磨剂相比,本发明具有以下创新点:
(1)用纸浆废液、三乙醇胺、多元醇、以及硫酸铝和磷石膏络合使用,可以得到比单独使用传统的如三乙醇胺等助磨剂更好的助磨效果,而且可以在不改变水泥早期强度的前提下有效提高其后期强度和安定性。
(2)加入十六烷醇可以有效减少水泥中的气孔,提高水泥的密实度,更有效地激发物料各组分中的潜在活性,从而获得较高的水泥强度。
(3)掺入安定剂和防开裂剂2-甲基-2,4-戊二醇,可有效提高水泥持久耐用性。本发明不含氯离子,无毒低碱安全,掺入量低(0.04%~0.1%),增强效果明显,符合国家关于水泥助磨剂的最新标准。由于可以使用工业废料,助磨剂成本也大为降低。
实验证明,本助磨剂以水泥总重0.04%~0.1%掺入时,能够有效改善水泥粉磨细度和降低电耗,可较大幅度提高水泥早、后期强度,并且无不利作用。通过安定、消泡成份与助磨成份联用,还可以改善的水泥混凝土的耐久性、密实性和阻锈功能。该水泥助磨增强剂性能高效工艺简单,而且所用原料成本低廉、易于储存运输,非常适合在水泥行业广泛应用。
具体实施方式
本发明的实现过程和材料的性能由实施例说明:
实施例一
首先将100g纸浆废液、4g三乙醇胺、3g乙二醇、3g丙二醇、3g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将1g十六烷醇、1g硫酸铝、1g磷石膏、2g 2-甲基-2,4-戊二醇、1g亚硝酸钙、1g丙烯基硫脲加入到20g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.04%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
实施例二
首先将100g纸浆废液、4g三乙醇胺、3g乙二醇、3g丙二醇、3g丙三醇、3g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将1g十六烷醇、1g硫酸铝、1g磷石膏、2g 2-甲基-2,4-戊二醇、1g亚硝酸钙、1g丙烯基硫脲加入到20g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.1%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
实施例三
首先将100g纸浆废液、10g三乙醇胺、4g乙二醇、4g丙二醇、4g丙三醇、4g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将1g十六烷醇、1g硫酸铝、1g磷石膏、2g 2-甲基-2,4-戊二醇、1g亚硝酸钙、1g丙烯基硫脲加入到20g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.1%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
实施例四
首先将100g纸浆废液、15g三乙醇胺、4g乙二醇、4g丙二醇、4g丙三醇、4g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将2g十六烷醇、2g硫酸铝、2g磷石膏、4g 2-甲基-2,4-戊二醇、2g亚硝酸钙、2g丙烯基硫脲加入到30g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.1%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
实施例五
首先将100g纸浆废液、10g三乙醇胺、5g乙二醇、10g丙三醇、5g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将2g十六烷醇、1g硫酸铝、1g磷石膏、2g 2-甲基-2,4-戊二醇、1g亚硝酸钙、1g丙烯基硫脲加入到20g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.1%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
实施例六
首先将100g纸浆废液、10g三乙醇胺、5g乙二醇、5g丙二醇、5g丙三醇、5g二乙二醇加入反应容器中,加热到60℃搅拌1小时使均匀混合,制成混合物A;将3g十六烷醇、2g硫酸铝、2g磷石膏、2g 2-甲基-2,4-戊二醇、1g亚硝酸钙、1g丙烯基硫脲加入到30g水中,60℃下进行充分搅拌0.5小时,制备混合物B;然后将混合物A维持在50-60℃,边搅拌边缓慢倒入混合物B均匀混合、充分搅拌1小时,即可得到不易沉淀的棕色液体水泥助磨增强剂。本发明提供的新型助磨剂在加入量为0.1%时对水泥有明显的助磨效果,筛余量降低;水泥样品在工艺条件不变的情况下,3天抗压强度可以提高4-8MPa,28天抗压强度可以提高7-17MPa,水泥强度实验效果见下表:
Claims (2)
1.一种液体水泥助磨增强剂,其特征在于本助磨增强剂各组分含量按重量百分比如下:纸浆废液占50~70%,三乙醇胺为2~10%,乙二醇、丙二醇、丙三醇、二乙二醇中的2~4种占2~15%,十六烷醇为0.5~2%,磷石膏和硫酸铝为0.5-5%,亚硝酸钙和丙烯基硫脲的混合物占1~2%、2-甲基-2,4-戊二醇为0~1%。
2.如权利要求1所述的液体水泥助磨增强剂的生产方法,其特征在于本生产方法按以下步骤操作:
(1)首先,将纸浆废液、三乙醇胺和乙二醇、丙二醇、丙三醇、二乙二醇中的2种或两种以上组合成份加入到反应器中,在30-60℃下进行充分搅拌1-2小时,得到均匀混合物A;
(2)将2-甲基-2,4-戊二醇、十六烷醇、硫酸铝、磷石膏、亚硝酸钙、丙烯基硫脲、十二烷基磺酸钠在重量百分数为5-20%的水中搅拌0.5-1小时,得到混合物B;
(3)将混合物A加热到50-60℃,边搅拌边缓慢倒入混合物B,均匀混合,充分搅拌1小时,即得到液体高效水泥助磨增强剂。
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