Analysis of the drying shrinkage behaviour of concrete using a micromechanical model based on the micropore structure of concrete

1997 ◽  
Vol 49 (181) ◽  
pp. 303-322 ◽  
Author(s):  
T. Shimomura ◽  
K. Maekawa
Keyword(s):  
Micromechanical Model ◽  
Drying Shrinkage ◽  
Micropore Structure ◽  
Model Based ◽  
Shrinkage Behaviour

Influence of coarse coal gangue aggregates on elastic modulus and drying shrinkage behaviour of concrete

2020 ◽  
Vol 32 ◽  
pp. 101748
Author(s):  
Qinghe Wang ◽  
Zhe Li ◽  
Yuzhuo Zhang ◽  
Huan Zhang ◽  
Mei Zhou ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Drying Shrinkage ◽  
Coal Gangue ◽  
Shrinkage Behaviour

scholarly journals Shrinkage Behaviour of Fibre Reinforced Concrete with Recycled Tyre Polymer Fibres

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Marijana Serdar ◽  
Ana Baričević ◽  
Marija Jelčić Rukavina ◽  
Martina Pezer ◽  
Dubravka Bjegović ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Drying Shrinkage ◽  
Fibre Reinforced Concrete ◽  
Restrained Shrinkage ◽  
Polypropylene Fibres ◽  
Concrete Mixtures ◽  
Shrinkage Behaviour ◽  
Different Types ◽  
Waste Tyre ◽  
Recycled Polymer

Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability of concrete structures. The hypothesis of the present research is that polypropylene fibres, used in concrete for controlling formation of microcracks due to shrinkage, can be replaced with recycled polymer fibres obtained from end-of-life tyres. To test the hypothesis, concrete mixtures containing polypropylene fibres and recycled tyre polymer fibres were prepared and tested. Experimental programme focused on autogenous, free, and restrained shrinkage. It was shown that PP fibres can be substituted with higher amount of recycled tyre polymer fibres obtaining concrete with similar shrinkage behaviour. The results indicate promising possibilities of using recycled tyre polymer fibres in concrete products. At the same time, such applications would contribute to solving the problem of waste tyre disposal.

Influence of Magnesia on Drying-Shrinkage Behaviour of Alumina

1997 ◽  
Vol 132-136 ◽  
pp. 358-361
Author(s):  
José Maria F. Ferreira ◽  
G. Tarì ◽  
O. Lyckfeldt
Keyword(s):  
Drying Shrinkage ◽  
Shrinkage Behaviour

Drying Shrinkage of Fly Ash-Based Self-Compacting Geopolymer Concrete

2014 ◽  
Vol 567 ◽  
pp. 362-368 ◽  
Author(s):  
M.F. Nuruddin ◽  
F.A. Memon ◽  
N. Shafiq ◽  
S. Demie
Keyword(s):  
Fly Ash ◽  
Relative Humidity ◽  
Drying Shrinkage ◽  
Time Dependent ◽  
Geopolymer Concrete ◽  
Test Results ◽  
Shrinkage Behaviour ◽  
One Year ◽  
Curing Regime

–The drying shrinkage behaviour of fly-ash-based self-compacting geopolymer concrete (SCGC) was studied for a period of one year. Two SCGC and One OPC-based conventional mixture were used in the present investigation. Drying shrinkage test commenced on the 7th day after casting the test specimens. Once the appropriate curing regime was completed, the specimens from each mix were placed in the laboratory room where the temperature was maintained at 23°C, however, the relative humidity of the room varied between 56 and 64 percent. Strain readings taken at specific intervals were analyzed to determine the time-dependent deformations of each mixture. Test results indicated that the heat-cured fly ash-based SCGC experienced very low drying shrinkage than that of water-cured OPC based concrete. After one year of exposure, in comparison to 466 με, the value experienced by OPC concrete, the drying shrinkage strains of SCGC mix specimens ranged between 141 and 159 με. These values were about 65-70% lower than that of OPC concrete. It is anticipated that the findings of this investigation would help in predicting the behaviour of SCGC. Keywords-Fly ash, Geopolymer concrete, Self-compacting Geopolymer concrete, Drying shrinkage

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