Performance Analysis of Postprocessing Algorithm and Implementation on ARM7TDMI

Gupta, Manoj; Kaushik, Brajesh Kumar; Chand, Laxmi

doi:10.1109/iccet.2009.179

Cited by 1 publication

(1 citation statement)

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“…For high performance lightweight concrete, Al-Attar and Al-Sakini [10] showed experimentally that using higher lightweight aggregate to binder ratio has negative effect on shrinkage. The results of Gupta et al [11] gave a conclusion that shrinkage strain of high strength concrete with 10% fly ash and silica fume replacement were higher by (6-10) % than concrete without them. The aim of this research is to investigate the effect of temperature variation on the rate of drying shrinkage development and on ultimate recorded values.…”

Section: Introductionmentioning

confidence: 99%

The role of ambient temperature variation on drying shrinkage development of self-compacting Portland-limestone cement concrete

2018

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The ambient temperature records in Iraq show a large variation between day and night reaching 20 C, depending on the season, whether it is summer or winter. For this reason, the aim of this research is to study the effect of these conditions on the drying shrinkage of self-compacting concrete produced by using Portland-Limestone cement (ASTM C595 - Type IL). SCC mixes were designed to attain compressive strengths of 40 and 60MPa at 28days with and without silica fume respectively. Same mixes were reproduced with ordinary Portland cement (ASTM C150 - Type I) for comparisons. Two maximum sizes of aggregate 10 and 20 mm were incorporated in this work. The drying shrinkage was measured for 180 days after 7 days of water curing. The range of ambient (outdoor) temperature variation was from - 4 to + 39°C and the relative humidity ranged from 15 to 60 %. The results of this exposure were compared to that of specimens kept in the shrinkage chamber, with a temperature of 21°C and relative humidity 35%. The current results showed that due to the irreversible nature of shrinkage strain, the drop of ambient temperature and the rise of atmosphere moisture or relative humidity would not reverse the shrinkage strain. It is important to figure the final total accumulated strain when dealing with ambient temperature variation. The drying shrinkage characteristics for concrete made with Type IL cement, are found similar to that for concrete produced with Type I cement.

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Section: Introductionmentioning

confidence: 99%