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张冰,安新正,马晓楠.养护条件对再生混凝土抗压与收缩性能的影响研究[J].河北工程大学自然版,2019,36(2):25-27,32
养护条件对再生混凝土抗压与收缩性能的影响研究
Effect of curing conditions on compression and shrinkage properties of recycled concrete
投稿时间:2019-03-03  
DOI:10.3969/j.issn.1673-9469.2019.02.006
中文关键词:  不同养护条件  再生混凝土  抗压强度  收缩性能
英文关键词:different curing conditions  recycled concrete  compressive strength  shrinkage performance
基金项目:河北省自然科学基金资助项目(E2015204111);河北省科学技术研究与发展计划资助项目(152736091)
作者单位
张冰 河北工程大学 土木工程学院, 河北 邯郸 056038 
安新正 河北工程大学 土木工程学院, 河北 邯郸 056038 
马晓楠 河北工程大学 土木工程学院, 河北 邯郸 056038 
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中文摘要:
      为研究不同养护条件下全再生粗骨料再生混凝土的抗压性能和收缩性能,试验采用了薄膜覆盖养护、干湿循环养护和浸水养护3种养护条件,在这三种养护条件下进行了1 d、3 d、7 d、14 d、28 d、45 d、60 d、90 d和120 d的再生混凝土抗压强度与收缩性能研究。结果表明:在3种不同的养护条件下,随着养护龄期的增长,再生混凝土的抗压强度和收缩应变不断增加。7 d时再生混凝土抗压强度在3种养护条件下区别不明显, 14 d时薄膜覆盖养护和浸水养护与干湿循环养护的抗压强度相比分别降低了8.7%和14.2%;3种养护条件下再生混凝土90 d时的收缩应变均趋于稳定, 120 d时薄膜覆盖养护较干湿循环养护的收缩应变增加了11.18%,浸水养护呈现湿胀现象。
英文摘要:
      In order to investigate the compressive and shrinkage properties of fully reclaimed coarse aggregate recycled concrete under different curing conditions, three kinds of curing conditions were used in this experiment:film covering curing, dry and wet circulation curing and water immersion curing. Experimental study on compressive strength and shrinkage properties of recycled concrete with 1 d,3 d, 7 d, 14 d, 28 d, 45 d, 60 d, 90 d and 120 d was carried out under these three curing conditions. The results show that under these three different curing conditions, the compressive strength and shrinkage strain of recycled concrete increase with the increase of curing age. At 7 d, the compressive strength of recycled concrete was not significantly different under the three curing conditions. At 14 d, the film coverage and immersion maintenance were reduced by 8.7% and 14.2% respectively compared with the compressive strength of dry and wet circulation curing. Under the three curing conditions, the shrinkage strain of recycled concrete at 90d tends to be stable. At 120 d, the shrinkage strain of the film covering curing is 11.18% higher than that of the dry and wet cycle. The immersion curing shows swelling.
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