Evaluation of Cracking Potential of High-Strength Concrete Induced by Autogeneous Shrinkage Under the Quasi-Complete Restraint Condition

Hayano, H.; Maruyama, Ippei; Noguchi, Takafumi; Tochigi, Takashi

doi:10.3130/aijs.72.9_7

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…In case of compressive load, generally it brings an increase of compressive strength [129][130][131]. While early age studies in tension are extremely complex and very rare, one paper showed that the direct tensile strength of concrete under sustained load (caused by autogenous shrinkage) is decreased [132].…”

Section: Cross-over Effect and Other Factors Affecting The Properties In Concrete Membersmentioning

confidence: 99%

Properties of early-age concrete relevant to cracking in massive concrete

Maruyama

Lura

2019

Cement and Concrete Research

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131

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Section: Cross-over Effect and Other Factors Affecting The Properties In Concrete Membersmentioning

confidence: 99%

Properties of early-age concrete relevant to cracking in massive concrete

Maruyama

Lura

2019

Cement and Concrete Research

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131

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“…In this experiment, strain and stress triggers were set to 4 3 10 À6 and 0 . 01 N/mm 2 in the measurement section (length 500 mm, cross-section 100 mm 3 100 mm) with reference to the study of Hayano et al (2008). The cross-head was controlled at intervals of 50 ms, while the movement speed was set to 0 .…”

Section: Quasi-fully Restrained Testmentioning

confidence: 99%

Modelling of creep of concrete mixed with expansive additives

Choi

Lim

Choi

et al. 2015

Magazine of Concrete Research

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The creep phenomenon of hardened cement mixed with expansive additives (EAs) was modelled by considering the creep performance of hydration products of cements and EAs under the assumption that the characteristics of hydration products of cements and EAs are fixed. A new composite model that is appropriate for particle conditions is proposed by considering the balance of the hydration products of cement and EA and the stress redistribution phenomenon of hydration products newly generated by the progress of hydration. Verification of the creep model indicated that the accumulated creep strains calculated by the model and those obtained through experiment were similar, thereby confirming that the model shows excellent estimation and evaluation performance. Furthermore, the stress could be sufficiently estimated by analysing the creep phenomenon corresponding to the progress of hydration under the restrained condition. NotationA C contact area a creep constant C volume ratio of unhydrated cement particles to unit volume of cement paste mixed with EAs C V (%) volume mixing rate of cement E volume ratio of unhydrated EA particles to unit volume of cement paste mixed with EAs E V (%) volume mixing rate of EAs n constant Q activation energy of hydration products R universal gas constant R t outermost radius of cement and EA particle after reaction r o radius of particle of cement and EA before hydration reaction r u radius of particle of cement and EA after hydration reaction T temperature of paste T 0 reference temperature t 0 reference time (1 h) t À ô time under load V volume increase rate V (T) function describing temperature effects V agg volume of aggregate in unit volume V c,e volume of cement and EAs in the cube V uhc volume of unhydrated cement particles V uhe volume of unhydrated EA particles x water-to-binder ratio AE hydration reaction ratẽ å c (t i , ô j , T i ) creep strain increment generated by stress increment˜ó (ô j ) that occurs at the next time interval (t i , t iþ1 ) å e (t i ) elastic strain that occurs due to new stress increment˜ó (ô i ) ó r,b sum of stress increments of step b å c(c)

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Autogenous Shrinkage Properties of Ultra-High-Strength Concrete Subjected to Early Heat Curing and a Technique for Their Prediction

Matuda¹,

Noguchi²,

Hasuo³

et al. 2010

Nihon Kenchiku Gakkai Kozokei Ronbunshu

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Concrete with a design strength of 100 to 150 N/mm 2 made using low-heat portland cement and silica fume (LSF) was subjected to thermal histories with different maximum temperatures (Tmax) to examine their autogenous shrinkage properties. The autogenous shrinkage properties were found to significantly change when Tmax exceeded 45 to 60�C. Comparing these results with past studies using portland cement, the authors clarified the autogenous shrinkage properties of LSF concrete and proposed a technique for their prediction by modifying conventional equations. Furthermore, the applicability of the proposed method was verified.

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Evaluation of Cracking Potential of High-Strength Concrete Induced by Autogeneous Shrinkage Under the Quasi-Complete Restraint Condition

Cited by 4 publications

References 2 publications

Properties of early-age concrete relevant to cracking in massive concrete

Properties of early-age concrete relevant to cracking in massive concrete

Modelling of creep of concrete mixed with expansive additives

Autogenous Shrinkage Properties of Ultra-High-Strength Concrete Subjected to Early Heat Curing and a Technique for Their Prediction

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