再生混凝土力学性能试验研究  

Experimental Research on the Mechanical Properties of Recycled Concrete

作　　者：李娜[1] 冯琪 南黄河[1] 何冰[1] 罗云荫 LI Na FENG Qi NAN Huang-he HE Bing LUO Yun-yin(Shaanxi Railway Institute, Weinan 714000, Shaanxi, China Dalian Institute of Technology, Modem Engineering Detection Co. LTD, Dalian 116024, Liaoning, China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]大连理工现代工程检测有限公司,辽宁大连116024

出　　处：《合成材料老化与应用》2017年第5期91-96,共6页Synthetic Materials Aging and Application

基　　金：陕西省教育厅自然科学基金专项(16JK1172);陕西省高性能混凝土工程实验室专项课题(G2015-01)

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,且两者的提高原因皆源于弹性应变的提高。Based on the ＆quot;Low temperature heating-particle shaping＆quot; process for separating waste concrete,the performance of recycled coarse aggregate,combined with the mechanical properties of the recycled concrete,were analyzed systematically in this paper. Compared to the reference concrete,all the results showed that the compres-sive strength of recycled concrete,which prepared by 40% replacement ratio of recycled coarse aggregate,was im-proved by 6. 9% and 4. 2% at 7d and 28d,respectively. The changes of peak stress followed that of the compres-sive 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：TQ172.71[化学工程—水泥工业]