玻璃轻石混凝土力学性能及热工性能试验研究
发布时间：2018-10-24 12:41
【摘要】：随着全球能源问题日益加剧和我国大力推行墙体改革、节能减排等相关政策,开发研制集废物利用、节能保温、安全可靠于一体的新型墙体材料成为建筑行业内的主要方向。几种传统的外墙保温工程做法各有不足,就连有效占领我国建筑节能主流市场的外墙外保温也存在易开裂、脱落、防火性能差等诸多缺点。废玻璃作为人们日常生活中对玻璃制品消费后产生的垃圾,既难处理又浪费资源。国内外将废玻璃直接粉碎后作为粗、细骨料应用于混凝土和砂浆的研究成果较为丰富,但多以达到混凝土和砂浆的工作性能和力学强度指标为研究目的,尚未涉及将经过粉碎、燃烧、发泡等工序处理后制备出的人造多孔材料——废玻璃再生轻石作为轻质骨料用于配制玻璃轻石混凝土的研究。在该背景下,进行玻璃轻石混凝土这种新型保温材料的性能研究和理论分析具有重要意义。因此,本文从玻璃轻石混凝土的原材料物理性能、配合比设计及其保温性能、基本力学性能展开了试验研究工作,同时结合对玻璃轻石混凝土用于外墙的具体住宅建筑的热工性能进行模拟分析。本文主要完成以下工作:(1)进行玻璃轻石骨料的物理力学性能试验,试验结果表明,玻璃轻石的各项性能指标均满足《轻集料及其试验方法》GBT17431-2010的相关要求,可以作为混凝土的轻质骨料。(2)根据正交试验设计原理,测定了16组不同配合比设计的玻璃轻石混凝土的导热系数和立方体抗压强度。通过对试验数据的极差和方差分析,得出各相关因素对玻璃轻石混凝土保温性能和抗压强度的影响规律和影响程度。水泥用量的增加使玻璃轻石混凝土抗压强度得到提高,但是降低了混凝土的保温效果;轻石粗细骨料总体积的增加使玻璃轻石混凝土保温效果得到了增强,但是降低了混凝土的抗压强度;轻石粗骨料级配的变化对玻璃轻石混凝土抗压强度和导热系数影响均不明显。各因素对玻璃轻石混凝土抗压强度的影响程度为:水泥用量最大,轻石粗细骨料总体积次之,轻石粗骨料级配最小;各因素对玻璃轻石混凝土导热系数的影响程度为:轻石粗细骨料总体积最大,水泥用量次之,轻石粗骨料级配最小。(3)采用DeST-h热工分析软件,以一栋位于武汉地区的住宅建筑作为研究对象,建立能耗计算模型。对比分析了分别采用玻璃轻石混凝土、加气混凝土和普通混凝土做外围护墙体材料时,房间、系统及整个建筑在采暖期、空调期和全年的能耗情况。计算结果表明,玻璃轻石混凝土外墙建筑和加气混凝土外墙建筑的能耗相差不大,说明两种保温体系的保温效果相当;同普通混凝土外墙建筑相比,玻璃轻石混凝土外墙建筑能够显著降低建筑能耗,尤其在采暖能耗方面,节能率均在60%以上,体现出玻璃轻石混凝土外墙体系优良的保温隔热性能。
[Abstract]:With the increasing global energy problem and China vigorously carrying out wall reform, energy saving and emission reduction policies, the development of new wall materials with waste utilization, energy conservation and insulation, safety and reliability has become the main direction in the construction industry. Several traditional methods of exterior wall insulation engineering have their shortcomings, even the external wall insulation which effectively occupies the mainstream market of building energy conservation in our country also has many shortcomings, such as easy cracking, falling off, poor fire resistance and so on. Waste glass is a kind of garbage produced by people's daily life, which is difficult to dispose and waste resources. Domestic and international research on the application of waste glass as coarse and fine aggregate in concrete and mortar is rich, but the purpose of the research is to achieve the working performance and mechanical strength of concrete and mortar, which has not been involved in crushing. The artificial porous material, waste glass regenerated lightweight stone, which was prepared by combustion, foaming and other processes, was used as lightweight aggregate to prepare glass-light stone concrete. Under this background, it is of great significance to study the properties and theoretical analysis of glass lightweight concrete, a new type of thermal insulation material. Therefore, in this paper, the physical properties of raw materials, mix ratio design and heat preservation performance, basic mechanical properties of glass lightweight concrete are studied experimentally. At the same time, the thermal performance of concrete with glass light stone used for exterior wall is simulated and analyzed. The main work of this paper is as follows: (1) the physical and mechanical properties of glass lightweight aggregate are tested. The results show that the properties of glass lightweight aggregate meet the requirements of "lightweight aggregate and its test method" GBT17431-2010. It can be used as lightweight aggregate of concrete. (2) according to the principle of orthogonal design, the thermal conductivity and cube compressive strength of 16 groups of glass lightweight concrete with different mix ratio are measured. Based on the analysis of the range and variance of the test data, the influence of various factors on the thermal insulation performance and compressive strength of glass lightweight concrete is obtained. With the increase of cement content, the compressive strength of glass-lightweight concrete is increased, but the insulation effect of concrete is reduced, and the thermal insulation effect of glass-lightweight concrete is enhanced with the increase of the total volume of lightweight aggregate. However, the compressive strength of the concrete is reduced, and the influence of the gradation of coarse aggregate on the compressive strength and thermal conductivity of the glassy lightweight concrete is not obvious. The influence of various factors on the compressive strength of glassy lightweight concrete is as follows: the cement content is the largest, the total volume of lightweight aggregate is the second, and the gradation of lightweight coarse aggregate is the least; The influence of various factors on the thermal conductivity of glassy lightweight concrete is as follows: the gross volume of lightweight aggregate is the largest, the content of cement is the second, and the gradation of coarse aggregate is the least. (3) DeST-h thermal analysis software is used. Taking a residential building in Wuhan area as the research object, the energy consumption calculation model is established. The energy consumption of the room, the system and the whole building during the heating period, the air conditioning period and the whole year are compared and analyzed when the glass light stone concrete, aerated concrete and ordinary concrete are used as the outer wall materials respectively, the room, the system and the whole building are used in the heating period, the air-conditioning period and the whole year. The calculation results show that the energy consumption of glass lightweight concrete exterior wall building and aerated concrete exterior wall building is not different, which indicates that the heat preservation effect of the two insulation systems is the same as that of ordinary concrete exterior wall building. Glass lightweight concrete exterior wall buildings can significantly reduce building energy consumption, especially in the heating energy consumption, the energy saving rate is above 60%, which reflects the good thermal insulation performance of glass lightweight concrete exterior wall system.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528
本文编号：2291449
[Abstract]:With the increasing global energy problem and China vigorously carrying out wall reform, energy saving and emission reduction policies, the development of new wall materials with waste utilization, energy conservation and insulation, safety and reliability has become the main direction in the construction industry. Several traditional methods of exterior wall insulation engineering have their shortcomings, even the external wall insulation which effectively occupies the mainstream market of building energy conservation in our country also has many shortcomings, such as easy cracking, falling off, poor fire resistance and so on. Waste glass is a kind of garbage produced by people's daily life, which is difficult to dispose and waste resources. Domestic and international research on the application of waste glass as coarse and fine aggregate in concrete and mortar is rich, but the purpose of the research is to achieve the working performance and mechanical strength of concrete and mortar, which has not been involved in crushing. The artificial porous material, waste glass regenerated lightweight stone, which was prepared by combustion, foaming and other processes, was used as lightweight aggregate to prepare glass-light stone concrete. Under this background, it is of great significance to study the properties and theoretical analysis of glass lightweight concrete, a new type of thermal insulation material. Therefore, in this paper, the physical properties of raw materials, mix ratio design and heat preservation performance, basic mechanical properties of glass lightweight concrete are studied experimentally. At the same time, the thermal performance of concrete with glass light stone used for exterior wall is simulated and analyzed. The main work of this paper is as follows: (1) the physical and mechanical properties of glass lightweight aggregate are tested. The results show that the properties of glass lightweight aggregate meet the requirements of "lightweight aggregate and its test method" GBT17431-2010. It can be used as lightweight aggregate of concrete. (2) according to the principle of orthogonal design, the thermal conductivity and cube compressive strength of 16 groups of glass lightweight concrete with different mix ratio are measured. Based on the analysis of the range and variance of the test data, the influence of various factors on the thermal insulation performance and compressive strength of glass lightweight concrete is obtained. With the increase of cement content, the compressive strength of glass-lightweight concrete is increased, but the insulation effect of concrete is reduced, and the thermal insulation effect of glass-lightweight concrete is enhanced with the increase of the total volume of lightweight aggregate. However, the compressive strength of the concrete is reduced, and the influence of the gradation of coarse aggregate on the compressive strength and thermal conductivity of the glassy lightweight concrete is not obvious. The influence of various factors on the compressive strength of glassy lightweight concrete is as follows: the cement content is the largest, the total volume of lightweight aggregate is the second, and the gradation of lightweight coarse aggregate is the least; The influence of various factors on the thermal conductivity of glassy lightweight concrete is as follows: the gross volume of lightweight aggregate is the largest, the content of cement is the second, and the gradation of coarse aggregate is the least. (3) DeST-h thermal analysis software is used. Taking a residential building in Wuhan area as the research object, the energy consumption calculation model is established. The energy consumption of the room, the system and the whole building during the heating period, the air conditioning period and the whole year are compared and analyzed when the glass light stone concrete, aerated concrete and ordinary concrete are used as the outer wall materials respectively, the room, the system and the whole building are used in the heating period, the air-conditioning period and the whole year. The calculation results show that the energy consumption of glass lightweight concrete exterior wall building and aerated concrete exterior wall building is not different, which indicates that the heat preservation effect of the two insulation systems is the same as that of ordinary concrete exterior wall building. Glass lightweight concrete exterior wall buildings can significantly reduce building energy consumption, especially in the heating energy consumption, the energy saving rate is above 60%, which reflects the good thermal insulation performance of glass lightweight concrete exterior wall system.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528
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