Development and application of energy-efficient, sustainable concretes

开发了用于绝缘混凝土模板(ICF)住宅建筑的自密实混凝土混合料，并进行了中试。在这些“生态混凝土”中，60%-70%的粘结剂是飞灰；此外，与用于房屋建设的传统混凝土相比，这些混凝土每立方米含有的波特兰水泥少65-100公斤。生态混凝土已经进行了初步的实验室和现场测试，这项工作最近在卡尔加里成功地建造了一个复式建筑，使用了我们的一种混合料，ICF建筑，预拌混凝土配料，运输和泵送。有必要进行进一步的研究和开发。因此，拟议研究的长期目标是：(1)确定用于生态混凝土工作的混合水泥和混凝土可以被CSA和从业者有信心地采用；(2)在特定条件下评估各种混合料的化学和微观结构特性，以解释其性能，从而为实际应用证实性能和可信度的科学基础；(3)建立与生态混凝土的各种结构和非结构应用相关的配合比准则和适当的施工实践。因此，拟议研究的短期目标是：(1)建立可以使用新的水泥/混凝土生态混凝土组合的特定环境；(2)评估生态混凝土对环境侵蚀的敏感性；(3)评估实验室中的各种配合比设计对现场配料、放置、整理和养护过程中的错误/滥用的稳健性；(4)为已经开发和将开发的生态混凝土建立其他潜在应用--特别是在暴露于环境的其他应用；(5)确定在生态混凝土中使用大量其他废物(如未分类的飞灰、天然火山灰)的潜力；(6)进一步确定实地生态混凝土建设的可行性(通过与建筑业的协作以及其他批出/合同机构的支持)。

Self-compacting concrete mixes for Insulated Concrete Form (ICF) residential construction have been developed and pilot tested. In these "eco-concretes" 60-70% of the binder is fly-ash; also, these concretes contain from 65-100 kg less portland cement per cubic metre, compared to traditional concretes used for house construction. The eco-concretes have had preliminary laboratory and field testing and the work has culminated in the recent successful construction of a duplex in Calgary using one of our mixes, ICF construction, ready-mix concrete batching, transportation and pumping. Further research and development is warranted.      The long-term objectives of the proposed research are: (1) to establish that the blended cements and concretes used for eco-concretes work, and can be adopted by CSA and practitioners with confidence; (2) evaluate chemical and microstructural properties of the various mixes under specified conditions in order to explain the their performance, and thus substantiate the scientific basis of performance and credibility for practical application; (3) establish mix-proportioning guidelines and appropriate construction practices relevant to a wide variety of structural and non-structural applications of eco-concretes.      The short-term objectives of the proposed research are: (1) establish specific environments within which the new cement/concrete eco-concrete combinations can be used; (2) assess the eco-concretes for susceptibility to attack by the environment; (3) assess the various mix designs in the laboratory for robustness against mistakes / abuses made during batching, placing, finishing and curing in the field; (4) establish other potential applications for the eco-concretes that have been, and will be, developed - especially other applications where there is exposure to the environment; (5) establish the potential for using high volumes of other wastes (e.g. unclassified fly ash, natural pozzolans) in eco-concretes; (6) further establish the viability of eco-concrete construction in the field (through collaborative work with construction industry support and support by other granting / contract agencies).