scholarly journals Relationship Between Gas Adsorption and the Shrinkage and Creep of Recycled Aggregate Concrete

2003 ◽  
Vol 25 (2) ◽  
pp. 11386
Author(s):  
RD Hooton ◽  
JMV Gómez-Soberón
Keyword(s):  
Gas Adsorption ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete ◽  
Shrinkage And Creep

scholarly journals Experimental Study on a Prediction Model of the Shrinkage and Creep of Recycled Aggregate Concrete

2019 ◽  
Vol 9 (20) ◽  
pp. 4322 ◽  
Author(s):  
Lv ◽  
Liu ◽  
Zhu ◽  
Bai ◽  
Qi
Keyword(s):  
Substitution Rate ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Creep Model ◽  
Aggregate Concrete ◽  
Ordinary Concrete ◽  
Group I ◽  
Significant Difference ◽  
Shrinkage And Creep ◽  
Group Ii

The significant difference between recycled aggregate and natural aggregate is the content of the attached mortar layer. With the increase of the replacement rate of recycled aggregate, the shrinkage and creep of recycled aggregate concrete is significantly increased. In this paper, 180-day shrinkage and creep tests of recycled aggregate concrete with different water–cement ratios were designed in order to analyze the effect of the substitution rate and water–cement ratio on shrinkage and creep properties. The results show that the shrinkage strain of recycled aggregate concrete with a substitution rate of 50% and 100% at 180 days is 26% and 48% higher than that of ordinary concrete, respectively, and the growth of group II is 22% and 47%, respectively. When the load was 180 days old, the creep coefficient of recycled aggregate concrete with a substitution rate of 50% and 100% in group I increased by 19.6% and 39.6%, respectively compared with ordinary concrete, and group II increased by 23.6% and 44.3%, respectively. Based on the difference of adhering mortar content, the creeping increase coefficient and shrinkage increase coefficient of the attached mortar were proposed, and a shrinkage and creep model of recycled aggregate concrete was established. When compared with the experimental results, the model calculation results met the accuracy requirements.

Review of Long-Term Deformation of Recycled Coarse and Fine Aggregate Concrete

2013 ◽  
Vol 448-453 ◽  
pp. 734-737
Author(s):  
Jun Li Luo ◽  
Zhi Sheng Xu ◽  
Di Zhao
Keyword(s):  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Quality Level ◽  
Fine Aggregate ◽  
Aggregate Concrete ◽  
Recycled Fine Aggregate ◽  
Deformation Properties ◽  
Shrinkage And Creep ◽  
Creep And Shrinkage

Due to long test cycle, high cost and the complex factors, the long-term deformation properties (such as creep and shrinkage) of recycled aggregate concrete (short for RAC) are rarely reported so far. However this property is essential to fully understanding and widely applying the RAC. Base on investigation on plenty of research results of the long-term deformation of RAC, this paper systematically analyzed the effect of recycled coarse aggregate (C-RA) and recycled fine aggregate (F-RA) on creep and shrinkage performance of concrete. The analysis shows that not only the replacement proportion but also the quality level of recycle aggregate (RA) affect the shrinkage and creep properties of RAC. This outcome could serve as a basis for further research.

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