2015
DOI: 10.1016/j.conbuildmat.2015.02.032
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Effects of nano and micro size of CaO and MgO, nano-clay and expanded perlite aggregate on the autogenous shrinkage of mortar

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Cited by 126 publications
(49 citation statements)
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“…On the other hand, the expansion potential of the ash could be advantageously used to mitigate autogenous shrinkage problems of high-performance cement-based materials made with very low water to binder ratios. Autogenous shrinkage induced by self-desiccation due to chemical shrinkage 29 can be compensated by expansive additives 30 . When restrained, the shrinkage-induced internal stresses may cause cracks, which impair the durability of the cement-based materials.…”
Section: Soundnessmentioning
confidence: 99%
“…On the other hand, the expansion potential of the ash could be advantageously used to mitigate autogenous shrinkage problems of high-performance cement-based materials made with very low water to binder ratios. Autogenous shrinkage induced by self-desiccation due to chemical shrinkage 29 can be compensated by expansive additives 30 . When restrained, the shrinkage-induced internal stresses may cause cracks, which impair the durability of the cement-based materials.…”
Section: Soundnessmentioning
confidence: 99%
“…However, the system contained 4.5 wt. % nanoclay revealed 1.5 % increased shrinkage compared to control system (Polat et al, 2015). At lower concentrations of nanoclay, internal curing might be the dominant mechanism, but at higher concentrations other mechanisms like pore filling/pore refinement (Sadrmomtazi and Fasihi, 2012) and nucleation (Camiletti et al, 2013;Jayapalan et al, 2010) could be dominant.…”
Section: Internal Curingmentioning
confidence: 98%
“…5 that micro-CaO and nano-MgO presented almost the same effect on the reduction of autogenous shrinkage at testing temperature of 20 ℃. (Polat et al, 2015) However, for application at elevated temperatures and pumping the cement slurry to great depths in oil wells, MgO is more efficient compared to CaO. In comparison with MgO, CaO exhibits a considerably higher free enthalpy and thus a higher reactivity, even in the dead-burnt state (Ghofrani and Plack, 1993).…”
Section: Expansive Additivesmentioning
confidence: 99%
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“…The tests were carried out instantly after the initial setting time. The test results were reformed for temperature strain caused by hydration, based on the assumption that the coefficient of linear thermal expansion is 10 × 10 −6 /°C …”
Section: Experimental Workmentioning
confidence: 99%