摘要
试验将建筑垃圾再生微粉经超微气流粉碎机处理后代替部分水泥制备泡沫混凝土,研究再生微粉掺量对泡沫混凝土干表观密度、抗压强度、导热系数和吸水率的影响。为了提高泡沫混凝土的强度,掺入一定量的聚丙烯纤维,研究纤维长度和掺量对泡沫混凝土强度的影响。结果表明:超微气流粉碎机可有效提高再生微粉的细度和活性,当掺量为10%时,能显著提高泡沫混凝土28 d抗压强度,在泡沫混凝土强度不变的情况下,再生微粉的掺量可达到20%;长为12 mm、掺量为0.4%的聚丙烯纤维泡沫混凝土的强度较好,提升了45.8%。
In this experiment,the recycled micropowder of construction waste was processed by ultra-micro airflow crusher to replace part of cement to prepare foamed concrete.The effects of the content of recycled micropowder on dry apparent density,compressive strength,thermal conductivity and water absorption of foamed concrete were studied.In order to improve the strength of foamed concrete,a certain amount of polypropylene fiber was added to study the influence of fiber length and dosage on the strength of foamed concrete.The results show that the fineness and activity of the regenerated micro powder can be effectively improved by the ultrafine airflow pulverizer.When the content of the regenerated micro powder is 10%,the 28 d compressive strength of the foamed concrete can be significantly improved.When the strength of the foamed concrete remains unchanged,the content of the regenerated micro powder can reach 20%.The strength of polypropylene fiber foamed concrete with the length of 12 mm and the content of 0.4%is better,which increases by 45.8%.
作者
王朝霞
WANG Zhao-xia(Shanxi Polytechnic College,Taiyuan,Shanxi,030006,China)
出处
《建材技术与应用》
2022年第3期5-8,共4页
Research and Application of Building Materials
基金
2020年度山西省高等学校科技创新项目(2020L0765)。
关键词
再生微粉
保温材料
泡沫混凝土
抗压强度
reclaimed powder
insulation material
foamed concrete
compressive strength
作者简介
王朝霞(1981-),女,山西交城人,讲师,硕士,主要从事建材化学分析方面的教学与研究。
