历史保护建筑外墙聚合物保温砂浆应用研究

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3.0 牛悦 2024-11-19 4 4 1.83MB 62 页 15积分
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摘 要
本文首先概述了目前国内外在建筑节能方面所做的工作，强调了墙体节能的
重要性，并对国内外墙体保温材料的研究进展与应用情况进行归纳总结。分析了
聚合物改性砂浆的研究与应用现状，采用以闭孔珍珠岩为轻集料，以丙烯酸酯共
聚乳液为添加剂的聚合物保温砂浆作为研究对象，通过制备添加丙乳与未加丙乳
两组闭孔珍珠岩保温砂浆试件，测得其各项性能参数。由测试结果的对比分析表
明，丙乳的加入能较好地改善保温砂浆的耐候性能和保温性能，降低砂浆的水灰
比和体积吸水率。另外针对三种闭孔珍珠岩，制备了不同配合比下的聚合物保温
砂浆，比较体积吸水率、抗压强度、导热系数等性能，研究保温砂浆的这些性能
随着配合比的不同而发生改变的规律，并提出了适应实际工程需要的聚合物保温
砂浆配合比。
在工程应用方面，本文为适应历史保护建筑节能改造工程的需要，还进行了
历史保护建筑物的承载力测试。作者选取了上海市某建于20世纪30年代拆迁房中
所拆除的人工砖，制作了三组砌体短柱试件，并进行了承载力试验，将试验结果
与计算结果进行比较。试验表明，用糯米灰浆砌筑的人工砖柱体的抗压承载力虽
小于普通水泥砂浆人工砖柱体，但其韧性却明显优于后者，以此为基础，得到了
适合历史保护建筑人工砖柱体承载力的计算公式。此外，还运用了红外热像仪对
在役历史保护建筑外墙体的保温性能进行现场检测。检测结果表明，红外热像检
测技术虽难以测定外墙的准确温度，但是在外墙热工缺陷普测方面较为方便快
捷，并具备较高的准确性。
本文还将聚合物保温砂浆应用于实际工程中，采用喷射工艺与钢丝网配套使
用进行试验墙加固改造，并进行保温性能试验。经过测定，其加固后墙体传热系
数为 2.697W/(m2·K)，相比原墙体传热系数 3.896 W/(m2·K)，保温性能提高了 30%。
说明，悬挂钢丝网喷射聚合物保温砂浆加固墙体施工技术既能达到加固效果，又
起到了改善墙体保温性能的作用。
关键词：历史保护建筑 聚合物保温砂浆 人工砖 红外热像 喷射砂浆
ABSTRACT
This paper summarizes the work in building energy conservation at home and
abroad, and emphasizes the importance of the wall’s energy conservation at first. And
the research and application of the insulation materials for wall are summarized. The
paper also analyzes the presents of polymer-modified mortar’s research and application.
Then the polymer-modified thermal insulation mortar which is added with obturator
perlite as light aggregate and acrylate copolymer emulsion as additive is taken as the
research object. The two groups of obturator perlite thermal insulation mortar specimens,
which are discriminated by adding acrylate copolymer emulsion or not, are prepared.
And the performance parameters of the specimens are measured. The result shows that
the weatherability and thermal insulation property of the polymer-modified thermal
insulation mortar are improved, and the water-cement ratio and water absorption are
reduced by adding acrylate copolymer emulsion. Moreover, the mortar specimens which
are respectively mixed with three kinds of obturator perlite with different particle size
distribution are made to compare their properties such as water absorption, compression
strength and thermal conductivity. Analyze the law of thermal insulation polymer mortar
properties’ changing with adding the polymer. And present the best mixed proportion of
the polymer-modified thermal insulation mortar which can meet the engineering
requirements.
In order to adapt to the energy-efficient retrofit of the historical preservation
buildings, the test for the buildings’ bearing capacity is carried out. The artificial brick
from the dismantled building which was built in the 1930s are selected to build three
groups of masonry short column specimens. And after the bearing capacity test, the test
results are compared with calculation results. It shows that the bearing capacity of the
artificial brick columns built by the sticky rice mortar is lower than that of those built by
the cement mortar, but the toughness is obviously higher. And based on this, the bearing
capacity formula of the historical preservation building’s artificial brick column is given.
In addition, the thermal infrared imager is used for on-site test for the thermal insulation
property of the existing historical preservation building’s outer walls. The test results
indicate that although it is hard to measure the wall’s accurate temperature by infrared
thermography detection technique, it is convenient, fast and accurate to measure in
general detection by that.
In this paper, the polymer-modified thermal insulation mortar is applied in practice.
In the strengthening work of the test wall, the steel wire reinforce method is used with
the spraying process. And the thermal insulation test performance test is carried out. The
measured result was that after strengthening the wall’s coefficient of heat transfer is
2.697W/(m2·K). Compared the coefficient of heat transfer before which is 3.896
W/(m2·K), the thermal insulation performance of the wall increases 30%. It shows that
steel wire reinforcing wall with spraying polymer-modified thermal insulation mortar
can not only strengthen the wall, but also improve the wall’s thermal insulation
performance.
Key Words: historical preservation building, polymer-modified
thermal insulation mortar, artificial brick, infrared thermography,
spraying mortar
目 录
中文摘要
ABSTRACT
第一章 绪 论 ...............................................................................................................1
§1.1 研究背景与意义 ...............................................................................................1
§1.2 国内外墙体保温材料的研究与应用现状 .......................................................2
§1.3 聚合物改性砂浆的研究与应用现状 ...............................................................4
§1.3.1 聚合物添加剂的分类 ................................................................................5
§1.3.2 聚合物改性砂浆性能 ................................................................................5
§1.3.3 聚合物改性砂浆的结构形成过程 ............................................................8
§1.3.4 聚合物与水泥的化学作用 ......................................................................10
§1.3.5 聚合物改性砂浆的应用 ..........................................................................10
§1.4 选题依据及研究内容 ......................................................................................11
§1.4.1 选题依据 ..................................................................................................11
§1.4.2 研究内容 ..................................................................................................11
第二章 聚合物对保温砂浆的改性试验研究 .............................................................13
§2.1 引言 .................................................................................................................13
§2.2 保温砂浆性能试验 ..........................................................................................13
§2.2.1 试验材料 ..................................................................................................13
§2.2.2 试件制作 ..................................................................................................14
§2.2.3 试验方法 ..................................................................................................15
§2.2.4 试验结果 ..................................................................................................17
§2.3 聚合物保温砂浆机理分析 .............................................................................17
§2.3.1 闭孔珍珠岩的结构 ..................................................................................17
§2.3.2 聚合物对水泥砂浆的影响 ......................................................................18
§2.3.3 聚合物在保温砂浆中的作用分析 ..........................................................20
§2.4 本章小结 ..........................................................................................................21
第三章 聚合物保温砂浆的物理力学性能测试 .........................................................23
§3.1 引言 .................................................................................................................23
§3.2 保温砂浆性能试验 .........................................................................................23
§3.2.1 试验材料 ..................................................................................................23
§3.2.2 试验过程 ..................................................................................................24
§3.3 试验结果分析 .................................................................................................25
§3.3.1 不同配合比下保温砂浆性能比较 ..........................................................25
§3.3.2 不同种闭孔珍珠岩保温砂浆性能比较 ..................................................29
§3.3.3 闭孔珍珠岩保温砂浆配合比的选用 ......................................................29
§3.4 本章小结 ..........................................................................................................29
第四章 历史保护建筑承载力及保温性能检测 .........................................................31
§4.1 引言 .................................................................................................................31
§4.2 砌体现有承载力试验研究 .............................................................................32
§4.2.1 材料强度试验 ..........................................................................................32
§4.2.2 砖柱体承载力试验 ..................................................................................32
§4.2.3 试验分析 ..................................................................................................34
§4.3 建筑外围护结构保温性能试验研究 .............................................................37
§4.3.1 红外热像检测技术 ..................................................................................37
§4.3.2 红外热像现场检测对象概况 ..................................................................37
§4.3.3 红外热像现场检测墙体导热性能 ..........................................................38
§4.3.4 红外热像现场检测墙体热工缺陷 ..........................................................40
§4.4 本章小结 .........................................................................................................42
第五章 喷射聚合物保温砂浆加固墙体工程应用技术 .............................................43
§5.1 引言 .................................................................................................................43
§5.2 使用材料器械及砂浆主要性能 .....................................................................43
§5.2.1 原材料 ......................................................................................................43
§5.2.2 聚合物砂浆配合比及其主要性能 ..........................................................44
§5.2.3 施工器械 ..................................................................................................44
§5.3 喷射聚合物砂浆技术 .....................................................................................45
§5.3.1 喷射砂浆技术 .........................................................................................45
§5.3.2 喷射聚合物砂浆加固和保温机理 .........................................................46
§5.4 施工步骤 .........................................................................................................46
§5.4.1 墙面处理 .................................................................................................46
§5.4.2 制作及悬挂钢丝网 ..................................................................................46
§5.4.3 界面砂浆的拌制及喷涂 ..........................................................................47
§5.4.4 保温砂浆的拌制及喷涂 ..........................................................................48
§5.4.5 施工注意事项 ..........................................................................................48
§5.5 施工墙体保温性能检验 .................................................................................48
§5.6 本章小结 .........................................................................................................49
第六章 主要结论与展望 .............................................................................................50
§6.1 主要结论 .........................................................................................................50
§6.2 后续研究工作 .................................................................................................51
参考文献 .........................................................................................................................52
在读期间公开发表的论文和承担科研项目及取得成果 .............................................57
致 谢 .............................................................................................................................58
摘要：

摘要本文首先概述了目前国内外在建筑节能方面所做的工作，强调了墙体节能的重要性，并对国内外墙体保温材料的研究进展与应用情况进行归纳总结。分析了聚合物改性砂浆的研究与应用现状，采用以闭孔珍珠岩为轻集料，以丙烯酸酯共聚乳液为添加剂的聚合物保温砂浆作为研究对象，通过制备添加丙乳与未加丙乳两组闭孔珍珠岩保温砂浆试件，测得其各项性能参数。由测试结果的对比分析表明，丙乳的加入能较好地改善保温砂浆的耐候性能和保温性能，降低砂浆的水灰比和体积吸水率。另外针对三种闭孔珍珠岩，制备了不同配合比下的聚合物保温砂浆，比较体积吸水率、抗压强度、导热系数等性能，研究保温砂浆的这些性能随着配合比的不同而发生改变的规律，并提出...

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作者：牛悦 分类：高等教育资料 价格：15积分 属性：62 页 大小：1.83MB 格式：PDF 时间：2024-11-19

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