再生混凝土力学性能的研究  

Study on Mechanical Properties of Recycled Concrete

作　　者：任铮钺 冯琪 房延凤[2] 

机构地区：[1]大连理工现代工程检测有限公司,大连116024 [2]大连理工大学土木工程学院建筑材料研究所,大连116024

出　　处：《材料导报》2014年第2期140-143,共4页Materials Reports

摘　　要：在低温加热-颗粒整形工艺分离废弃混凝土的基础上,分析研究了再生粗骨料的性能以及再生混凝土的力学性能。实验结果表明:在水灰比和砂率相同的基础上,相较于素混凝土,当再生粗骨料代替率为40%时,再生混凝土7d和28d的抗压强度分别提高约6.9%和4.2%;再生混凝土的峰值应力变化与抗压强度变化趋势相同,且两者的提高皆源于弹性应变的提高。Based on the low temperature heating-particle shaping process for separating waste concrete,the performance of recycled coarse aggregate,combined with the mechanical properties of the recycled concrete,were analyzed systematically.Compared to the reference concrete,all the results showed that the compressive strength of recycled concrete,which prepared by 40% replacement ratio of recycled coarse aggregate,was improved by 6.9% and 4.2% at 7 d and 28 d,respectively.The changes of peak stress followed that of the compressive strength,which caused by the improvement of the corresponding elastic strain.

关 键 词：再生粗骨料 低温分离工艺 弹性应变 

分 类 号：TU528.09[建筑科学—建筑技术科学]