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引用本文:	姜伟,杨正宏,袁勇.轻骨料混凝土早龄期受压徐变试验研究[J].建筑材料学报,2016,19(1):40-44

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轻骨料混凝土早龄期受压徐变试验研究
姜伟¹, 杨正宏¹, 袁勇²
1.同济大学先进土木工程材料教育部重点实验室,上海201804;2.同济大学岩土及地下工程教育部重点实验室,上海200092

摘要:

配制了抗压强度为30MPa的普通混凝土和轻骨料页岩陶粒混凝土，对2组试件进行了早龄期（0～28d）收缩试验，以及应力水平为30%的早龄期变应力徐变试验.结果表明：轻骨料混凝土在早龄期的收缩量略小于同等强度的普通混凝土，徐变系数约为同等强度普通混凝土的50%，但是早龄期的徐变终值为同等强度普通混凝土的13倍.

关键词: 轻骨料混凝土陶粒徐变收缩

DOI：103969/j.issn1007 9629201601007

分类号:

基金项目:国家自然科学基金资助项目（51308405）；“十二五”国家科技支撑计划项目（2012BAJ02B02）

Compressive Creep of Lightweight Aggregate Concrete at Early Age

JIANG Wei¹, YANG Zhenghong¹, YUAN Yong²

1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804,China;2.Key Laboratoryof Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai 200092, China

Abstract:

Lightweight aggregate concrete and normal concrete were prepared, and the creep behaviors were tested by the varying stress creep test at the stress level of 30% together with the shrinkage age test at early age(028d). Results show that lightweight aggregate concrete has less shrinkage, and creep coefficient is 50% that of normal concrete with the same strength at early age. Whereas the creep strain of lightweight aggregate concrete is almost 13 times that of normal concrete at early age.

Key words: lightweight aggregate concrete ceramsite creep shrinkage