含再生混凝土骨料碾压混凝土的力学性能

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-08-01 DOI:10.7764/rdlc.20.2.277

Hojjat Hosseinnezhad, Daniel Hatungimana, Ş. Yazici

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引用次数: 6

摘要

研究了含再生混凝土骨料碾压混凝土(RCC)的抗压强度、劈裂抗拉强度、脉冲速度和抗落锤冲击性能。碾压混凝土混合料的水泥掺量分别为150、200和250 kg/m3。除了不含RCA的对照混合物外，还将25%、50%、75%和100wt %的碎石灰石骨料替换为RCA。用这种方法制备了15种碾压混凝土混合料。采用最大密度法测定碾压混凝土混合料的含水量。结果表明，随着再生骨料掺量的增加，混凝土的力学性能有所下降。在25%的替代水平下，再生骨料对碾压混凝土的性能没有明显的不利影响。此外，RCA取代的有害影响在较稀薄的混合料中更为明显，并通过增加RCC的水泥含量而降低。

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Mechanical properties of roller compacted concrete containing recycled concrete aggregate

The compressive strength, splitting tensile strength, pulse velocity, and drop weight impact resistance of roller-compacted concrete (RCC) mixtures containing recycled concrete aggregate (RCA) were investigated. The cement contents of the RCC mixtures were chosen as 150, 200 and 250 kg/m3. In addition to the control mixtures containing no RCA, 25, 50, 75, and 100 wt% of the crushed limestone aggregate was replaced with RCA. In this way, 15 RCC mixtures were prepared. The water content of RCC mixtures was determined by the maximum density method. The results showed that increasing the amount of recycled aggregate decreased the mechanical properties of the concrete. However, up to 25% replacement level, recycled aggregate had not a significant detrimental effect on the properties of RCC. Besides, the detrimental effect of RCA substitution was more pronounced in leaner mixtures and reduced by increasing the cement content of the RCC.

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来源期刊

Revista de la Construccion 工程技术-工程：土木

CiteScore

2.30

自引率

21.40%

发文量

期刊介绍： The Journal of Construction is aimed at professionals, constructors, academics, researchers, companies, architects, engineers, and anyone who wishes to expand and update their knowledge about construction. We therefore invite all researchers, academics, and professionals to send their contributions for assessment and possible publication in this journal. The publications are free of publication charges. OBJECTIVES The objectives of the Journal of Construction are: 1. To disseminate new knowledge in all areas related to construction (Building, Civil Works, Materials, Business, Education, etc.). 2. To provide professionals in the area with material for discussion to refresh and update their knowledge. 3. To disseminate new applied technologies in construction nationally and internationally. 4. To provide national and foreign academics with an internationally endorsed medium in which to share their knowledge and debate the topics raised.