咖啡渣灰对植生混凝土的性能影响研究  

Study on the effect of coffee grounds ash on the performance of green-growing concrete

作　　者：李金屏 黄荣 孙雪迪 于德亮 陈筝 LI Jinping;HUANG Rong;SUN Xuedi;YU Deliang;CHEN Zheng(College of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Shaanxi Construction Engineering Fifth Construction Group Co.Ltd.,Xi'an 710032,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]陕西建工第五建设集团有限公司,陕西西安710032

出　　处：《新型建筑材料》2024年第12期52-55,共4页New Building Materials

基　　金：中央高校基本科研业务费专项资金项目(300102213511)。

摘　　要：为研究咖啡渣灰在植生混凝土中的利用潜力,采用咖啡渣灰等质量替代水泥制备植生混凝土,研究咖啡渣灰掺量为5%、10%、15%时对植生混凝土抗压强度、碱度及孔隙率的影响,并测试了高羊茅在咖啡渣灰植生混凝土中的植生性能。结果表明:咖啡渣灰7、28 d的活性指数分别为39.7%、47.9%;当咖啡渣灰掺量为5%时,咖啡渣灰植生混凝土7、28 d抗压强度分别较未掺时提高了8.3%、21.6%;当咖啡渣灰掺量为15%时,咖啡渣灰植生混凝土的孔隙率最大,为28.4%;随着咖啡渣灰掺量增加,咖啡渣灰植生混凝土的碱度逐渐降低;高羊茅在基质内掺咖啡渣的咖啡渣灰植生混凝土中21 d生长高度明显增大,生长密度更密集,生长速度明显优于未掺组。To investigate the potential utilization of coffee grounds ash in green-growing concrete,green-growing concrete was prepared by replacing cement with coffee grounds ash of equal volume.The effects of coffee grounds ash content of 5%,10%,and 15%on the compressive strength,alkalinity,and porosity of green-growing concrete were studied,and the green-growing performance of tall fescue in coffee grounds ash green-growing concrete was tested.The results showed that the activity indices of coffee grounds ash at 7 and 28 days were 39.7%and 47.9%,respectively.When the content of coffee grounds ash is 5%,the compressive strength of coffee grounds ash green-growing concrete at 7 and 28 days increased by 8.3%and 21.6%respectively compared to the untreated condition.When the coffee grounds ash content is 15%,the porosity of coffee grounds ash green-growing concrete is the highest,at 28.4%.As the amount of coffee grounds ash increases,the alkalinity of coffee grounds ash planted concrete gradually decreases.After 21 days,the growth height and density of tall fescue in coffee grounds ash green-growing concrete increased,and the growth rate was significantly better than that of the untreated group.

关 键 词：咖啡渣灰 植生混凝土 抗压强度 孔隙率 植生性能 

分 类 号：TU528[建筑科学—建筑技术科学]