Secondary aggregates and seawater employment for sustainable concrete dyke blocks production: Case study
Secondary aggregates and seawater employment for sustainable concrete dyke blocks production: Case study
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DOI：
10.1016/j.conbuildmat.2016.03.097
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发表时间：
2016-06-15
影响因子：
7.4
通讯作者：
Limeira, Jussara
中科院分区：
文献类型：
--
作者：
Etxeberria, Miren;Manuel Fernandez, Jesus;Limeira, Jussara
这项研究工作的主要目的是验证使用粗混合再生骨料、钢渣骨料和海水现场实际规模生产堤防砌块。在巴塞罗那港口内进行真正规模的混凝土砌块生产(第二阶段)之前，进行了实验室实验阶段(第一阶段)。结果表明，由50%粗骨料和50%粗钢骨料组成的混凝土性能最好，可用于堤防砌块的生产。采用高比例粗掺和再生骨料(不含钢渣骨料)生产的混凝土在饱和状态下可以获得足够的性能。用海水代替淡水减少了混凝土的凝结时间和混凝土的孔隙率，从而减少了混凝土的透水性和毛细吸水能力。海水的使用提高了混凝土早期的抗压强度。还得出结论，实验室研究取得的成果和取得的技术诀窍可以转化为大型项目。(C)2016爱思唯尔有限公司。保留所有权利。
The main objective of this research work was to validate the on site real scale production of dyke blocks employing coarse mixed recycled aggregates, steel slag aggregates and seawater. A laboratory experimental phase (Phase 1) was carried out prior to real scale concrete block production within Barcelona's port (Phase 2). According to the results, the concretes produced with a combined mixture of 50% coarse mixed aggregates and 50% of coarse steel aggregates achieved the most adequate properties for use in dyke block manufacturing. The concrete produced employing high percentages of coarse mixed recycled aggregates (without steel slag aggregates) could achieve adequate properties in its saturated state. The use of seawater instead of freshwater reduced the concrete's setting time as well as the porosity of the concretes produced, resulting in both the reduction of water penetration and the capillary water absorption capacity of the concretes. The use of seawater increased concrete's compressive strength at early age. It was also concluded that the results obtained in the laboratory studies and the technical know-how achieved can be transferred to large scale projects. (C) 2016 Elsevier Ltd. All rights reserved.