再生骨料对自密实混凝土性能的影响.pdf

Construction and Building Materials 113 (2016) 498–505 Contents lists available at ScienceDirect Construction and Building Materials journal homepage: www. /loc ate/conbuildmat Influence of recycled aggregates on properties of self-consolidating concretes Lilia Señas a, Carla Priano a,⇑, Silvina Marfil b a Department of Engineering, Universidad Nacional del Sur, Av. Alem 1253, (8000) Bahía Blanca, Argentina b Department of Geology, Universidad Nacional del Sur, CIC Province of Buenos Aires – INGEOSUR, Bahía Blanca, Argentina h i g h l i g h t s It is feasible to incorporate crushed concrete powder in order to achieve maximum use of the recycled concrete. The influence of admixtures must be studied not only in fresh mixtures but also in hardened concrete. Petrographic studies revealed that the incorporation of crushed concrete powder makes the mortar matrix denser. a r t i c l e i n f o a b s t r a c t Article history: Recycled aggregates are made from crushed waste concretes and can be used as a replacement of natural Received 4 September 2015 aggregates in concrete production. Despite having lower density and higher absorption than natural Received in revised form 1 March 2016 aggregates, they can be used to manufacture conventional concretes with good performance if they Accepted 17 March 2016 are added in the proper amounts. To make self-consolidating concretes, the same aggregates used to manufacture conventional concretes can be used, but in order to increas