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Compression tests of cement-composite bearing pads for precast concrete connections

机译：预制混凝土连接用水泥复合材料轴瓦的压缩试验

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摘要

A cement-based material is developed to produce bearing pads for precast concrete connections. The material consists of sand mortar that includes additions of soft aggregate, latex, and short fibres to obtain greater deformability and high toughness. The additions used in this study were vermiculite, styrene-butadiene latex and either PVA or glass fibres. The proposed material is tested in the form of cylindrical samples, bearing pads under uniform load and bearing pad strips under concentrated loads. Based on the experimental results, the main conclusions are: (a) the largest amount of fibres should be used, within the limits of mixture workability, mainly for enhancing the bearing pad capacity to accommodate surface irregularities, (b) glass fibres perform better than PVA fibres when the material is subjected to concentrated loads, and (c) bearing pad thickness beyond 10 mm is of limited value.
机译：开发了一种水泥基材料，以生产用于预制混凝土连接的轴承座。该材料由砂浆组成，砂浆中添加了软骨料，乳胶和短纤维，以获得更大的可变形性和高韧性。本研究中使用的添加剂是were石，苯乙烯-丁二烯胶乳和PVA或玻璃纤维。所提议的材料以圆柱形样品，均布载荷下的轴承瓦块和集中载荷下的轴承瓦条的形式测试。根据实验结果，主要结论是：（a）在混合可加工性的范围内，应使用最大量的纤维，主要是为了增强承载垫的能力以适应表面不规则性;（b）玻璃纤维的性能优于当材料承受集中载荷时的PVA纤维，以及（c）超过10毫米的轴承瓦厚度是有限值。

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