全再生细骨料免蒸压陶粒轻质混凝土隔墙板研究  

Study on Non-autoclaved Ceramsite Lightweight Concrete Partition Wallboard Using Complete Recycled Fine Aggregate

作　　者：杨医博[1,2] 曾威振 李颜君 陈峭卉 郭文瑛[1] 詹建潮 陈应钦 王恒昌[1] YANG Yibo;ZENG Weizhen;LI Yanjun;CHEN Qiaohui;GUO Wenying;ZHAN Jianchao;CHEN Yingqin;WANG Hengchang(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,China;China Railway Construction Real Estate Huanan Co.,Guangzhou 510000,China;Guangdong Building Materials Research Institute,Guangzhou 510000,China)

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510641 [3]中铁房地产集团华南有限公司,广州510000 [4]广东省建筑材料研究院,广州510000

出　　处：《硅酸盐通报》2020年第8期2641-2649,共9页Bulletin of the Chinese Ceramic Society

基　　金：广东省公益研究与能力建设专项资金资助项目(2014B020216001);华南理工大学国家级大学生创新创业训练计划(201710561183);华南理工大学学生研究计划(201710561183,X201910561665)。

摘　　要：全再生细骨料(Complete Recycled Fine Aggregate)是废弃混凝土利用的新方法,其表观密度和吸水性能明显优于传统再生细骨料。采用全再生细骨料替代河砂制备了免蒸压陶粒轻质混凝土及隔墙板试件,测试了所制备材料的面密度、抗压强度和干缩率。实验结果表明:优选的全再生细骨料免蒸压陶粒轻质混凝土配合比为水胶比为0.30,砂胶比为2.0,陶粒绝对体积掺量为15%,混凝土目标湿密度为1650 kg/m^3;在面密度相同时,与使用河砂的免蒸压陶粒轻质混凝土隔墙板相比,全再生细骨料免蒸压陶粒轻质混凝土隔墙板抗压强度略高,干缩值较大,其较高的干缩值可能是其含水率较高和实验前浸泡饱水所致,可通过延长养护时间至7 d解决;使用引气方式制备的全再生细骨料免蒸压陶粒轻质混凝土隔墙板的面密度、抗压强度和干缩率均能满足JG/T 169—2016《建筑隔墙板用轻质条板通用技术要求》标准要求,与现有的蒸压陶粒轻质混凝土隔墙板相比,其混凝土材料成本可降低23%;采用全再生细骨料制备免蒸压陶粒轻质混凝土隔墙板是促进废弃混凝土再生利用和隔墙板绿色生产的有效途径。Complete recycled fine aggregate(CRFA)is a new method for the utilization of waste concrete,and its apparent density and water absorption performance are obviously better than that of traditional recycled fine aggregate.In this paper,non-autoclaved ceramsite lightweight concrete(NCLC)and partition wallboard specimens were prepared by using CRFA to replace river sand,and the surface density,compressive strength and dry shrinkage of the prepared materials were tested.The results show that the preferred CRFA-NCLC mix ratio is water-binder ratio of 0.30,sand-binder ratio of 2.0,the absolute volume content of ceramsite of 15%and concrete target wet density of 1650 kg/m^3.When the area density is the same,compared with river sand,the compressive strength of the CRFA-NCLC partition wallboard is slightly higher and the dry shrinkage value is higher.The higher dry shrinkage of CRFA-NCLC may be due to its higher moisture content and soak in water before experiment,which can be solved by prolonging the curing time to 7 d.The area density,compressive strength and dry shrinkage performance of the air entrained CRFA-NCLC partition wallboard meet the requirements of the general technical requirements of light weight panel used for building partition(JG/T 169—2016).Compared with the existing autoclaved ceramsite lightweight concrete partition wallboard,the CRFA-NCLC partition wallboard has obvious economic advantages,and the cost of concrete material reduces by 23%.The preparation of the NCLC partition wallboard by CRFA is an effective way to promote the recycling of waste concrete and the green production of partition wallboard.

关 键 词：全再生细骨料 陶粒轻质混凝土 隔墙板 引气剂 泡沫剂 免蒸压 

分 类 号：TU528.72[建筑科学—建筑技术科学]