硫铝酸盐水泥发泡材料的试验研究

发布时间：2018-07-03 02:32

本文选题：发泡水泥 + 干表观密度　；参考：《青岛理工大学》2013年硕士论文

【摘要】：发泡水泥是一种含有大量封闭独立气孔，具有轻质、保温、隔热、耐火及隔音等性能的材料。其主要成型工艺为：料浆在搅拌过程中利用化学方法引入气泡，形成发泡水泥拌合物，将拌合物浇筑入模后膨胀而成。利用硫铝酸盐水泥制备无机发泡保温材料，，具有强度发展快，生产周期短的特点。然而硫铝酸盐水泥价格高，如何科学有效利用矿物掺合料来降低生产成本是工程界普遍关心的问题。本试验首次将石油化工企业的废渣—脱硫石油焦灰渣用于硫铝酸盐水泥发泡材料，基于双氧水发泡工艺，制作出低容重且保温性能优良的硫铝酸盐水泥—粉煤灰—石油焦渣发泡保温材料。本文获得了国家“十二五”科技支撑计划子课题“磨细高硫石油焦脱硫灰渣建材利用技术研究”（2011BAJ04B05-05）的资助，主要研究了水胶比和发泡剂用量对保温材料性能的影响。硫铝酸盐水泥—粉煤灰—石油焦渣胶凝材料体系中石油焦渣掺量占胶凝材料总量的20%，变化发泡剂用量分别为胶凝材料总量的6.7%、7.3%、8.0%和8.7%，变化水胶比为0.7、0.8、0.9和1.0，通过试验总结出干表观密度和抗压强度的变化规律。选取合适配比按照JG/T041-2011的要求，测试制品的干表观密度、抗压强度、导热系数、软化系数、含水率、体积吸水率和燃烧等级等性能指标。本文最后也对低密度发泡水泥应用于自保温砌块进行了相关研究。研究结果表明：（1）激发剂的掺入加快了发泡剂的反应速率，缩短了发泡持续时间约5~10min。（2）水胶比为0.7~1.0，稳泡剂掺量为0.02%时，浆料较容易拌合，气泡能均匀分布，不会出现分层，脱模时间较短。（3）发泡剂用量的增加和水胶比的增大均能降低发泡制品的干表观密度和抗压强度。（4）随着发泡剂用量的增加，制品的孔径也随之增大，但水胶比的变化对孔直径影响不大，制品的孔径大概在0.5~2mm。（5）在本研究中，测得制品的干表观密度为200~300kg/m3，抗压强度为0.3~0.6MPa，导热系数为0.04~0.08W/(m·k)，软化系数不小于0.7，含水率不超过3%，采用外涂防水憎水处理剂，体积吸水率完全可以达到10%以内，燃烧等级为A级。基于本研究已申报发明专利1项，实用新型专利2项。本试验采用的脱硫石油焦渣和粉煤灰均属于工业废弃物，具有绿色环保和再生利用的特点，符合循环经济的要求，并具有显著的经济效益。
[Abstract]:Foamed cement is a kind of material which contains a large number of closed independent pores with light, heat insulation, heat insulation, fire resistance and sound insulation. The main forming process is that the slurry is introduced by chemical method in the stirring process to form foamed cement mixture, and the mixture is poured into the mold. The foam insulation material has the characteristics of fast development and short production cycle. However, the price of sulphoaluminate cement is high. How to use mineral admixture effectively to reduce the production cost is a common concern in the engineering field. For the first time, the waste residue of the petrochemical enterprise, desulfurization petroleum coke slag, is used for the foaming material of sulphoaluminate cement. Based on the hydrogen peroxide foaming process, a sulfoaluminate cement fly ash petroleum coke slag foaming insulation material with low bulk density and excellent thermal insulation property was produced.
This article is supported by the national "12th Five-Year" science and technology support program "Research on the utilization technology of fine high sulfur petroleum coke desulphurization ash building materials" (2011BAJ04B05-05). It mainly studies the effect of water gel ratio and the amount of foaming agent on the properties of thermal insulation materials. The amount of coke residue accounts for 20% of the total amount of cementitious material. The amount of change foaming agent is 6.7%, 7.3%, 8% and 8.7% of the aggregate of cementitious material, and the change of water glue ratio is 0.7,0.8,0.9 and 1. The change law of the apparent density and compressive strength of the dry surface is summed up by the test. The suitable ratio of the dry surface density and compressive strength of the products is tested according to the requirements of JG/ T041-2011. Strength, thermal conductivity, softening coefficient, moisture content, volume water absorption and combustion grade etc. in the end of this paper, the application of low density foam cement to self insulation block is also studied in this paper.
The results show that: (1) the addition of activator accelerates the reaction rate of the foaming agent, shortens the foaming duration about 5~10min. (2) and the ratio of water to glue is 0.7~1.0, and when the amount of foam stabilizer is 0.02%, the slurry is more easily mixed and the bubbles can be distributed evenly, no stratification and short release time. (3) the increase of the amount of foaming agent and the increase of the ratio of water to glue. The dry surface density and compressive strength of the foaming products can be reduced. (4) with the increase of the amount of foaming agent, the pore size of the products increases, but the change of water binder ratio has little effect on the diameter of the hole. The pore diameter of the product is about 0.5~2mm. (5). The dry apparent density of the products is 200~300kg/m3, the compressive strength is 0.3~0.6MPa, and the thermal conductivity system is in this study. With the number of 0.04~0.08W/ (M. K), the softening coefficient is not less than 0.7 and the water content is not more than 3%. Using the waterproof and hydrophobic treatment agent coated with outer coating, the volume of water absorption can be less than 10% and the combustion grade is a grade. Based on this study, 1 patents and 2 utility model patents have been declared.
The desulfurization petroleum coke residue and fly ash are industrial wastes, which have the characteristics of green environmental protection and recycling, which meet the requirements of the recycling economy and have significant economic benefits.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU551.33

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