کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6725121 | 503609 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Early-age strain-stress relationship and cracking behavior of slag cement mixtures subject to constant uniaxial restraint
ترجمه فارسی عنوان
رابطه بین تنش و تنش در اوایل سنین و رفتار ترک خوردگی مخلوط سیمان سرباره با محدودیت ثابت یک طرفه
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کلمات کلیدی
پتانسیل خرد کردن، مدول موثر، انقباض تضعیف شده، میزان انقباض، سیمان سرباره، رابطه استرس تنش،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
In this study, the early-age strain-stress development of mixtures containing slag cement was measured on uniaxially restrained specimens using a specially designed testing frame starting right after casting. It was found that thermal deformation dominates early-age stress development in low w/cm and low slag cement paste systems. While for concrete, autogenous shrinkage is the major contributing factor for tensile stress development. The early-age stress development of uniaxially restrained cementitious mixture specimens is profoundly influenced by the overt early-age relaxation effect, such that the compressive stress is significantly reduced and tensile stress develops before shrinkage begins. A linear shrinkage and tensile stress relationship is found to exist in mixtures subject to such constant restraint, regardless of w/cm and slag cement contents. Slag cement has the benefit of delaying tensile stress development and cracking time because of the reduced early-age thermal effect as compared to the ordinary Portland cement mixture. The cracking of the slag cement mixture is mainly due to the greater long-term autogenous shrinkage. The cracking time is found closely related to the shrinkage rate rather than the shrinkage magnitude, a unique relationship can be used to describe such phenomenon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 49, December 2013, Pages 635-642
Journal: Construction and Building Materials - Volume 49, December 2013, Pages 635-642
نویسندگان
Ya Wei, Will Hansen,