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Just foamed concrete- an overview


Foamed concrete is manufactured by adding a foaming agent to a cement based mortar. The foaming agent can be added to the mixture and foam formed through vigorous mixing or the foaming agent can be aerated before being added to the mixture (prefoaming). The foamed concrete discussed in this paper has been manufactured using prefoaming. Over the last fifty yuears the use of foamed concrete in the construction industry has been almost exclusively limited to non-structural applications such as void filling, thermal insulation, acoustic dampening, trench filling and building blocks. Although foamed concrete has been widely used it is perceived to be weak and non-durable. Tests conducted at the University of Pretoria in South Africa during the past ten years indicate that the short and long term properties of foamed concrete is such that the material could well be used for structural elements. In South Africa large volumes of pulverized fuel ash (pfa) is available at relatively low cost and the effect of using high percentages of pfa under different curing regimes has been investigated. Tests have been conducted on the use of steel reinforced foamed concrete in structural applications. The behavior of foamed concrete elements has been compared to that of normal concrete elements of the same compressive strength. The use of fibers in foamed concrete to improve shear behavior is discussed.......

【作者名称】: E P Kearsley
【关 键 词】: Foamed concrete, Pulverized--fuel ash (PFA), Curing, Durability, Fibers, Shear strength
【会议名称】: International Conference on Specialist Techniques and Materials for Concrete Construction, held at the University of Dundee, Scotland, UK on 8-10 September 1999
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 101,629,269
【摘要长度】: 1,405
【会议地点】: Dundee(GB)
【会议时间】: 1999
【上篇论文】: 外文会议 - Investigation of factors causing problems in dam behaviour and dam safety using rough sets theory
【下篇论文】: 外文会议 - Synthesis of Sand Particles from 3D Shape Descriptors using Tomographic Reconstruction Techniques

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