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分析了国内外再生骨料生产混凝土多孔砖技术研究和应用现状,从建筑垃圾再生骨料分类及其评价方法、混凝土多孔砖配比设计、力学性能、防裂抗裂等方面提出了将来研究方向,为再生骨料生产混凝土多孔砖技术研究和应用提供参考。 相似文献
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《四川建材》2017,(3):1-3
基于考虑了再生骨料及其内部天然骨料随机分布的再生混凝土二维细观模型,采用与蒙特卡罗法相结合的有限元方法,通过MATLAB编程仿真实现了再生混凝土弹性问题的数值模拟。利用像素网格法避免了骨料间距离较近时网格划分的困难,试验结果验证表明,此方法在保证计算精度的情况下提高了计算效率。进一步研究了再生骨料及其内部天然骨料随机分布、骨料含量、骨料级配及骨料种类对于再生混凝土弹性性能的影响。结果表明,骨料随机分布是造成再生混凝土弹性性能随机性的重要因素;再生混凝土弹性参数均值随着骨料含量、骨料等效弹性参数的增大而增大,骨料级配对于弹性参数的影响不明显;弹性参数的变异性随着骨料含量、再生骨料与新砂浆弹性参数间差异、骨料粒径的增大而增大,但在实际工程中可忽略骨料含量的影响。 相似文献
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结合国内外再生粗骨料混凝土的研究现状,综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容,展望了再生粗骨料及再生混凝土未来研究方向。 相似文献
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再生混凝土的抗压强度试验研究 总被引:2,自引:0,他引:2
研究了再生混凝土的力学性能特征。探讨再生粗骨料含量对再生混凝土抗压强度的影响、随龄期延长强度发展规律及其龄期系数;研究普通混凝土28d抗压强度方程对再生混凝土的适用性。结果表明,随着再生粗骨料增加,混凝土的抗压强度降低;再生混凝土抗压强度的发展规律与普通混凝土基本一致,但再生混凝土强度提高较慢,各龄期系数均低于普通混凝土;普通混凝土28d抗压强度方程不能适用于再生混凝土。 相似文献
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颗粒整形再生骨料混凝土力学性能的试验研究 总被引:2,自引:1,他引:1
试验研究了颗粒整形再生骨料混凝土、简单破碎再生骨料混凝土和天然骨料混凝土的力学性能.结果表明:全组分颗粒整形再生骨料混凝土的力学性能低于天然骨料混凝土,但大大优于简单破碎再生骨料混凝土.另外,颗粒整形再生粗骨料配置的混凝土力学性能明显高于简单破碎再生骨料混凝土与全组分颗粒整形再生混凝土,略低于天然骨料混凝土,该试验结果对于工程实践具有一定指导作用. 相似文献
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建筑工程施工中,再生骨料混凝土的应用对于环境保护以及资源节约有着十分重要的作用,但由于再生骨料存在一定的缺陷,会对制备的混凝土性能造成一定的影响,制约了再生骨料混凝土在工程施工中的应用效果.基于此,本文主要阐述了再生骨料混凝土及其特性,介绍了再生砂浆的制备、储存和施工,并分析了再生骨料在砂浆中的应用,希望对提高再生骨料... 相似文献
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廖容 《建材高教理论与实践》2008,(6):65-67
定性研究与定量研究是教育科学研究方法中的两大主要范式,两者既存在较大差别,也互相联系,互为补充。定性研究与定量研究在历史中的地位不同,理论基础不同,研究目的不同,研究中的各个层面也不同。在对两者进行比较的基础上,分析了两者相结合对高等教育科学研究的启示。 相似文献
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The structure of Swedish research finance was radically changed in 2001, and the present goals of research policy are that Sweden is to be a leading research nation, where research with a high scientific quality is conducted. However, the process of internationalizing Swedish building research leads to an issue of how international standards for scientific quality are applied and how Swedish researcher participation in industry initiatives and European framework programmes is supported. This issue is discussed against a background of a national system where research funding is indirectly and strongly linked to university teaching, which also means that research institutes are comparatively unimportant. International expansion of large firms in the construction industry has led to an increasing engagement with university research. However, the current process intended to guarantee high scientific quality in projects with national funding is inflexible and not fully compatible with what is required for industry and European research cooperation. 相似文献
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The structure of Swedish research finance was radically changed in 2001, and the present goals of research policy are that Sweden is to be a leading research nation, where research with a high scientific quality is conducted. However, the process of internationalizing Swedish building research leads to an issue of how international standards for scientific quality are applied and how Swedish researcher participation in industry initiatives and European framework programmes is supported. This issue is discussed against a background of a national system where research funding is indirectly and strongly linked to university teaching, which also means that research institutes are comparatively unimportant. International expansion of large firms in the construction industry has led to an increasing engagement with university research. However, the current process intended to guarantee high scientific quality in projects with national funding is inflexible and not fully compatible with what is required for industry and European research cooperation. 相似文献
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对知识的传授和探索是大学的基本特征,二者的有机结合使教学和科研相得益彰。文章探索了将液压与气动技术教学和科研相结合方式,即课堂教学与科研相结合、实验教学和科研相结合、创新小组进入科研团队三种方式,这对培养学生的创新能力起到了促进作用。 相似文献
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ABSTRACTThis paper examines the issue of assessing the value of social design research. It locates the emergence of social design practice and research against a background in which public and social organisations are increasingly bureaucratised as a result of New Public Management and shifts to New Public Governance. Within universities, too, organisational processes and structures require research to demonstrate impact within an audit culture. Through the study presented in this paper, we claim that the bureaucracies found in contemporary academia are ill-equipped to adequately assess generative, impactful, and multi-sited research in which value is co-produced with diverse participants. This presents challenges when attempting to understand the value of social design research. Building on social research and studies of innovation policy, sustainable human-computer interaction and evaluation, we define social design research as inventive, contingent, and political. To address the issue of its evaluation, we propose two-stage social design research. In the first stage, research issues, questions, methods, data, and ‘proto-publics’ are assembled, which reveal the conflicting framings and ways that value is assessed. These are re-assembled in a second stage during which the research is stabilised. The findings have implications for research managers, academics and their partners, and university administrators. 相似文献
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空间钢结构研究与应用的进展 总被引:2,自引:1,他引:1
本评述了近年来空间钢结构在研究和应用方面的进展情况。中首先讨论了空间钢结构不断发展的原因及其分类一在关键研究课题方面,着重阐述了在结构分析和设计理论、网壳结构的稳定性、空间构架的抗震性能以及张拉结构的风振问题等课题中所取得的科研成果,以及需要进一步研究的问题。在工程应用方面,以一些典型的空间钢结构工程为例。总结了当前发展的特点,即形式的多样化、预张力的合理运用、与膜结构的结合:在结语中对今后空间钢结构的发展趋势提出了看法。 相似文献
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混凝土冻融破坏机理及国内外研究现状 总被引:1,自引:0,他引:1
在收集国内外大量研究资料的基础上,介绍了混凝土抗冻性能研究现状,总结了影响混凝土抗冻性能的主要因素及混凝土的冻融破坏机理,为混凝土抗冻性能研究提供相关依据。 相似文献
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新型节能保温材料现状及阻燃技术的研究 总被引:1,自引:0,他引:1
综述了节能保温材料的国内外研究现状及发展趋势,提出开展新型节能保温材料的防火阻燃研究势在必行.并重点介绍了采用锥形量热计、热分析仪、扫描电镜等研究测试手段深入研究新型节能保温材料的阻燃技术情况,展望其应用前景.研究中采用在有机阻燃剂中加入复合无机阻燃剂和在粘接剂分子结构中引入无机阻燃元素的技术路线,研制的新型节能保温防火阻燃材料不仅有高效的保温、隔热性能、优良的阻燃效果和高效的耐水、耐久性能,且无毒、燃烧时不产生浓烟和毒气,原料来源丰富,成本低. 相似文献