The effect of water absorption distribution of recycled coarse aggregate on the compressive strength distribution of high-performance concrete

IF 1.1 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
Xiaoguang Chen, Elke Gruyaert, Özlem Cizer, Jiabin Li
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引用次数: 0

Abstract

High water absorption is a typical characteristic of recycled coarse aggregate and is often used to explain the loss of performance of concrete when replacing natural coarse aggregate with recycled coarse aggregate. Extensive attention has been paid to the mean value of the water absorption of recycled coarse aggregate, but not to the standard deviation. This paper aims to assess whether recycled coarse aggregates with the same mean water absorption but different standard deviations will perform equally in high-performance concrete (HPC). The resulting HPC mixtures exhibited very similar compressive strength. Even so, it was hypothesised that as the standard deviation of the water absorption of recycled coarse aggregate increases over a wide range, the compressive strength of HPC will first increase due to local variations in the water/cement ratio, then decrease due to the presence of weak particles, and finally remain constant due to the role of the surrounding new mortar.
再生粗骨料吸水率分布对高性能混凝土抗压强度分布的影响
高吸水率是再生粗骨料的典型特征,常被用来解释用再生粗骨料替代天然粗骨料时混凝土性能的损失。再生粗骨料吸水率的平均值得到了广泛的关注,但对其标准差的关注较少。本文旨在评估具有相同平均吸水率但不同标准差的再生粗骨料在高性能混凝土(HPC)中的性能是否相同。所得的HPC混合物表现出非常相似的抗压强度。尽管如此,我们假设当再生粗骨料吸水率的标准差在较大范围内增大时,HPC的抗压强度会先因水灰比的局部变化而增加,然后因弱颗粒的存在而降低,最后由于周围新砂浆的作用而保持不变。
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来源期刊
Materiales de Construccion
Materiales de Construccion 工程技术-材料科学:综合
CiteScore
3.20
自引率
9.50%
发文量
38
审稿时长
>12 weeks
期刊介绍: Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2
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