Properties of Self-Compacting Concrete Prepared with Coarse Recycled Concrete Aggregates and Different Water:Cement Ratios

被引：28
|
作者：
Nieto, D. [1 ]
Dapena, E. [1 ]
Alaejos, P. [2 ]
Olmedo, J. [1 ]
Perez, D. [1 ]
机构：
[1] Univ Politecn Madrid, ETS Ingn Civil, Dept Ingn Civil Construcc Infraestruct & Transpor, Alfonso XII 3, Madrid 28014, Spain
[2] Minist Fomento, Lab Cent Estruct & Mat CEDEX, Alfonso XII 3, Madrid 28014, Spain
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2019年 / 31卷 / 02期
关键词：
FRESH; PERFORMANCE; DURABILITY;
D O I：
10.1061/(ASCE)MT.1943-5533.0002566
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The purpose of this study is to analyze the influence of recycled coarse aggregates (RCA) used to manufacture self-compacting concrete with recycled aggregates (SCRC) by evaluating the characteristics of this concrete, particularly its self-compactibility. Another aim is to determine the simple compressive strength at 28days and the durability (water penetration and carbonation). The concrete was prepared with different RCA percentages (0%, 20%, 40%, 60%, 80%, and 100%) and water:cement (w/c) ratios of 0.45, 0.50, and 0.55. A constant percentage of superplasticizer was added, and two saturation methods were analyzed with a w/c=0.45 ratio, one before and one during mixing. The results indicate that using up to 20% RCA has little influence on the characteristics of the SCRC, meaning that SCRC can be prepared with up to 40% substitutes, depending on the water:cement ratio.
引用
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页数：15
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