Wet casting of multiple mix horizontally layered concrete elements
Wet casting of multiple mix horizontally layered concrete elements
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DOI：
10.1016/j.conbuildmat.2020.118514
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发表时间：
2020-06-30
影响因子：
7.4
通讯作者：
Lees, Janet M.
中科院分区：
文献类型：
--
作者：
Brault, Andre;Lees, Janet M.
功能级配混凝土，其中多种混合物在结构元件中分层，是最大限度地减少水泥使用的有前途的技术。然而，制造湿对湿级配混凝土时的挑战是控制浇注到同一模具中的多种混合物的新鲜状态变形。水平浇注元件与两个不同的混凝土混合层进行了研究，以确定混合密度，工作性和层顺序的影响，对预期的材料放置。水平层是可以实现的，除非顶层的可加工性比底层的硬得多，或者顶层更致密并且两种混合物都是流体。这些发现为开发低碳材料和提高水泥效率提供了机会。(C)2020爱思唯尔有限公司保留所有权利。
Functionally graded concrete, where multiple mixes are layered in structural elements, is a promising technology for minimising cement use. However, a challenge when fabricating wet-on-wet graded concrete is the control of the fresh state deformations of multiple mixes cast into the same mould. Horizontally cast elements with two different concrete mix layers were investigated to ascertain the influence of mix density, workability and layer sequence on the intended material placement. Horizontal layers were achievable unless the workability of the top layer was much stiffer than that of the bottom, or the top layer was denser and both mixes were fluid. The findings underpin opportunities for the exploitation of lower carbon materials and cement efficiency. (C) 2020 Elsevier Ltd. All rights reserved.