【作者】 彭玖玲；

【导师】 罗逸；

【作者基本信息】 华中科技大学 ， 物理化学， 2009， 硕士

【摘要】 混凝土是当今使用量最大的建筑材料之一,将泡沫引入混凝土,在混凝土内部产生微小的、封闭独立的均匀气泡,可形成质轻、保温性能好的泡沫混凝土,主要用于屋面、非承重墙及热力管道的保温层。随着泡沫混凝土在工程中应用的日益广泛,对发泡剂以及泡沫混凝土进行深入研究非常必要。本文主要针对泡沫节能材料的发泡剂、发泡技术、制备工艺、材料选择、材料配比做了一系列实验研究。实验表明,OP与纤维素醚复配作为发泡剂,纤维素醚浓度为0.3%～0.5%;OP浓度在0.4%～0.6%之间时,有较好发泡效果,而且成本低。复合材料的发泡结果表明,水料比在0.60～0.63时,浆料容易拌和,泡沫能均匀分布,不会出现分层,脱模时间较短,产品密度在0.65～0.70g/cm³之间。粉煤灰在制备泡沫节能材料中主要作为惰性充填材料,随着粉煤灰掺量的增大,材料的抗压强度降低。在普通水泥作为胶结材料时,粉煤灰掺量不宜超过45%,在氯氧镁水泥作为胶结材料时,粉煤灰掺量不宜超过40%。氯氧镁水泥-粉煤灰混合材料的发泡试验证实,氧化镁和氯化镁保持在一定的比例范围内有利于提高氯氧镁水泥-粉煤灰泡沫混凝土的各种性能;当MgCl₂过量时,容易产生泛霜,而MgO过量时,不利于氯氧镁水泥的硬化;粉煤灰在一定程度上改善了氯氧镁水泥制品的抗水性和泛霜现象。另外,我们还对磷石膏制作隔热材料做了一些发泡研究,通过发泡在其内部形成分布均匀、相互独立的细小气孔后,可明显增加它的隔热能力。更多还原

【Abstract】 Concrete is one of the largest building materials in use. The introduction of foam into concrete, made the concrete have a small internal, closed independent uniform bubbles, which can form light weight, good insulation properties of foam concrete, mainly used for roofing, non-load-bearing walls and thermal insulation layer pipeline. With the foam concrete’s widespread application in construction, an in-depth study of the blowing agents, as well as foam concrete is necessary.In this paper, to address the foaming agent, technology of foam materials, preparation, material selection, material ratio has done a series of experiments on.The results show that, OP and the cellulose ether compound as a blowing agent, when cellulose ether concentration between 0.3% ~ 0.5% and OP concentration between 0.4% ~ 0.6 %, have a good foaming effect and lawer cost.Through bubbling testing, the water ratio in the 0.60 ~ 0.63, the slurry mixing easy, foam can be uniformly distributed, will not be hierarchical, the product have a densty between 0.65～0.70g/cm3.Fly ash mainly as an inert filling material in foam energy-saving materials, the amount of fly ash is more, the compressive strength of foam materials is lawer. The common cement as the cementation materials, the content of fly ash shouldn’t be more than 45%, while the magnesium oxychloride cement as the cementation materials, the content of fly ash shouldn’t be more than 40%.In magnesium oxychloride cement foam material, magnesia and sodium chloride have a right ration can improve the proformance of magnesium oxychloride cement materials. Fly ash has improved the performance of the magnesium oxychloride cement products to some extent, such as water resistance and anti-frost phenomena.In addition, we also made same foaming research with Phosphogypsum materials, through the formation of small pores in their internal, which are uniformly distributed and independent of each other, have a marked increase in the capacity of its insulation.更多还原