轻集料混凝土复合保温外挂墙板的研制及其性能研究

发布时间：2018-03-16 12:17

  本文选题：住宅产业化　切入点：外挂墙板　出处：《吉林建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,随着城市建设的迅速发展,建筑能耗在世界能源总耗量中占有的比例日益增大,不仅严重污染了环境,而且制约了世界各国的可持续发展。为了解决能源危机,同时满足城市建设的发展需求,就必须研制和推广新型绿色墙体材料。当前,新型墙体的代表产品主要是复合墙体,它能够最大限度地完成工业化生产和科学化管理,实现建筑节能,推进住宅产业化的进程。但由于板体自身过重的原因,目前已经制约了这项新型墙体节能技术的发展。本文将通过pp纤维、聚合物、泡沫剂改性后的火山渣轻集料混凝土应用于复合保温外挂墙板技术中,在满足各方面性能要求的同时大大减轻了板体的重量,有效促进了该项技术的发展。具体的工作内容如下:(1)依据我国现行国家规范和地方标准,建立火山渣轻集料混凝土复合保温外挂墙板的计算模型,并计算EPS保温材料的厚度,使建筑节能率达到65%。通过有限元分析软件的模拟计算和相关的力学计算论证了火山渣轻集料混凝土复合保温外挂墙板结构设计的理论可行性;(2)研究纤维、聚合物、泡沫剂对火山渣轻集料混凝土性能的影响。在火山渣轻集料混凝土中单掺和混掺pp纤维、聚合物、泡沫剂三种改性物质,火山渣轻集料混凝土的抗压强度和抗折强度提高,吸水率降低。在火山渣轻集料混凝土中掺植物秸秆纤维,可以提高火山渣轻集料混凝土的抗压强度和抗折强度。将泡沫剂掺入火山渣轻集料混凝土中,导热系数降低,改善了热工性能;(3)研究建筑垃圾红砖部分替代和完全替代火山渣对混凝土性能的影响。红砖部分或完全替代火山渣制备混凝土,可以提高混凝土的基本力学性能和吸水率,降低混凝土的抗渗性能和抗冻性能;(4)通过正交试验设计和极差分析,研究pp纤维、聚合物、泡沫剂的掺量对火山渣轻集料混凝土基本力学性能和吸水率的影响。发现当pp纤维掺量为1.5‰、聚合物掺量为10%、泡沫剂掺量为0.1‰时,火山渣轻集料混凝土各方面性能最为理想,由此确定火山渣轻集料混凝土的最佳配合比;(5)采用最佳配合比的火山渣轻集料混凝土和基本配合比的火山渣轻集料混凝土进行抗氯离子渗透性能和抗冻性能对比试验,发现改性火山渣轻集料混凝土的抗渗性和抗冻性得到了很大提高;(6)采用SEM研究改性火山渣轻集料混凝土的微观结构,发现pp纤维、聚合物、泡沫剂可显著改善火山渣轻集料混凝土界面过渡区结构;(7)依据相关国家标准对采用最佳配合比的火山渣轻集料混凝土制备的复合保温外挂墙板进行性能测试。发现墙板的物理力学性能和热工性能均符合标准要求,可以应用于实际工程。
[Abstract]:In recent years, with the rapid development of urban construction, the proportion of building energy consumption in the total energy consumption of the world is increasing day by day, which not only pollutes the environment seriously, but also restricts the sustainable development of countries all over the world. At the same time, to meet the development needs of urban construction, it is necessary to develop and popularize new green wall materials. At present, the representative products of the new wall are mainly composite walls, which can maximize industrial production and scientific management. The development of this new wall energy saving technology has been restricted by the reason that the plate body itself is overweight. In this paper, pp fiber, polymer, The modified volcanic slag lightweight aggregate concrete is used in the composite insulation wall board technology, which can meet the performance requirements of various aspects and greatly reduce the weight of the plate body at the same time. The concrete work contents are as follows: 1) according to the current national and local standards of our country, the calculation model of volcanic slag lightweight aggregate concrete composite insulation wall board is established, and the thickness of EPS insulation material is calculated. Through the simulation calculation of finite element analysis software and related mechanics calculation, the theoretical feasibility of structural design of composite thermal insulation wall panel of volcanic slag lightweight aggregate concrete is demonstrated. The influence of foaming agent on the performance of volcanic slag lightweight aggregate concrete. The compression strength and flexural strength of volcanic slag lightweight aggregate concrete are improved by adding and mixing three modified substances, pp fiber, polymer and foam agent, The compressive strength and flexural strength of volcanic slag lightweight aggregate concrete can be improved by adding plant straw fiber into the volcanic slag lightweight aggregate concrete. The thermal conductivity of the volcanic slag lightweight aggregate concrete is reduced by adding foam agent into the volcanic slag lightweight aggregate concrete. The influence of partial substitution and complete substitution of red brick on concrete performance is studied. The basic mechanical properties and water absorption of concrete can be improved by using red brick partially or completely instead of volcanic slag to prepare concrete. To reduce the impermeability and frost resistance of concrete by orthogonal design and range analysis, PP fibers and polymers are studied. The effect of foaming agent content on the basic mechanical properties and water absorption of volcanic slag lightweight aggregate concrete is studied. It is found that when the content of PP fiber is 1.5 鈥，

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