Results 101 to 110 of about 8,674 (232)

Synergistic effect of expansive agent and internal curing on the performance of UHPC

open access: yesCase Studies in Construction Materials
The challenge of autogenous shrinkage in ultra-high performance concrete (UHPC) arises from the scarcity of expansive hydration products and insufficient water for cement hydration, which jeopardize structural stability.
Weibo Tan   +6 more
doaj   +1 more source

Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

open access: yesFrontiers in Materials, 2019
In this study, the role of a locally available rice husk ash (RHA) in reducing early-age shrinkage of high performance concrete (HPC) after evaluating its pozzolanic reactivity was evaluated.
Muhammad Nasir Amin   +4 more
doaj   +1 more source

PREDICTION OF OCCURRENCE OF CRACKS DUE TO AUTOGENEOUS SHRINKAGE AND DRYING SHRINKAGE

open access: yesDoboku Gakkai Ronbunshu, 2000
コンクリートのひび割れ発生時期を予測する研究の一環として, 一軸拘束試験体を用いてコンクリートの収縮によりひび割れを発生させ, 各種の要因がひび割れ発生時期に及ぼす影響, ひび割れ発生点近傍のひずみの挙動, 引張伸び能力や収縮応力強度比のひび割れ発生限界点としての適用性などについて検討し, さらに, 逐次解析を行い実験値と解析値の比較を行った. その結果, コンクリートの収縮ひずみが部材内で均一でないことがひび割れ発生時期をばらつかせる原因であること, ひび割れ発生に影響を与えている範囲から算定した引張伸び能力や, 強度発現条件を考慮した収縮応力強度比は, ひび割れ発生時期を予測する限界点として実用上適用できることなどを示した.
Toshio OHNO, Taketo UOMOTO
openaire   +2 more sources

Autogenous shrinkage, speciality of high performance concretes [PDF]

open access: yes, 2015
Autogenous shrinkage is a consequence of self dessication in pores of hardened cement paste and is, at high performance concrete significantly greater than that of the ordinary concretes, mainly due to low water to cement ratio.
Vogrič, Nina
core   +1 more source

Can superabsorbent polymers mitigate shrinkage in cementitious materials blended with supplementary cementitious materials? [PDF]

open access: yes, 2016
info:eu-repo/semantics ...
De Belie, Nele   +2 more
core  

Mitigating early age shrinkage in internally cured concrete under extreme dry conditions with MEA and SRA

open access: yesJournal of Materials Research and Technology
While internal curing technology has proven effective in mitigating shrinkage and cracking in concrete, its limitations under extremely arid conditions remain a significant challenge.
Xing Xia   +4 more
doaj   +1 more source

Aggregate Restraining Effect on Autogenous Shrinkage of Cementitious Materials

open access: yesKSCE Journal of Civil Engineering, 2018
In this paper the restraining effect of aggregates on autogenous shrinkage of cementitious materials is investigated by using different maximum aggregate sizes. Experimental studies were conducted to determine the restraining effect of aggregates on autogenous shrinkage of composites with a paste to aggregate ratio of 70 to 30 by volume percent. It was
openaire   +3 more sources

Proceedings of the 4th International Conference on Service Life Design for Infrastructure (SLD4) [PDF]

open access: yes, 2018
SLD4 is a conference on Service Life Design for Infrastructures which is jointly organised by Delft University and Tongji University as part of the RILEM week 2018 in Delft, The Netherlands.
Rodriguez, Claudia Romero   +4 more
core  

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