摘要
为了提高金邦板的抗弯曲荷载的力学性能,采用微硅粉代替石英粉,并增加了聚丙烯纤维材料组成。利用SEM、XRD和MIP等微观测试手段对新型的金邦板的水化产物、微观结构以及孔结构进行了系统研究。结果表明,在相同掺量的条件下,掺微硅粉的板材强度明显高于掺石英粉的板材强度;掺有微硅粉金邦板小于10nm小孔占40.8%,大于100nm大孔占25.2%,平均孔径只有12.5nm;而掺有石英粉金邦板小于10nm小孔占15.5%,大于100nm大孔占42.6%,平均孔径达到23.4nm,表明掺有微硅粉的金邦板结构更加致密。掺有微硅粉金邦板生成的托勃莫来石与CS-H凝胶产物数量均多于掺有石英粉的金邦板样品。金邦板材料组成中加入聚丙烯纤维,可明显提高板材的抗弯曲强度,当聚丙烯纤维掺量为3kg时,金邦板抗弯曲强度达到最大值。
To improve the mechanical properties of jinbang plate under flexural loading,we replaced quartz powder with silica powder and polypropylene fiber was added.The hydration products,microstructure and pore structure of the new type of jinbang plate were studied systematically by means of SEM,XRD,and MIP.The experimental results show that the jinbang plate mixed with silica powder is higher than that mixed with silica powder under the same condition.The pore size of the jinbang plate mixed with silica powder is less than 10nm,which accounts for 40.8%,and that of the larger one is more than 100nm,which accounts for 25.2%with the average pore size only 12.5nm.However,the pore size of the jinbang plate mixed with quartz powder is less than 10nm,which accounts for 15.5%,and that of the larger one is more than 100nm,which accounts for 42.6%with the average pore size 23.4nm.These results show that the structure of jinbang plate mixed with silica powder is more compact.The amount of tobermorite and calcium silicate hydrates produced by the jinbang plate mixed with silica powder is more than that of the jinbang plate mixed with quartz powder.When polypropylene fiber wi added into the jinbang plate,the bending strength of the board can be significantly improved.When the polypropylene fiber content is 3kg,the bending strength of jinbang plate reaches the maximum value.
作者
杨正波
万惠文
刘俊岩
胡勇
郭宗帅
符昱
李泾娴
YANG Zheng-bo;WAN Hui-wen;LIU Jun-yan;HU Yong;GUO Zong-shuai;FU Yu;LI Jing-xian(Beijing New Building Materials Public Limited Company,Beijing 102209,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
北大核心
2019年第4期29-34,47,共7页
Journal of Wuhan University of Technology
基金
大宗尾矿及低品质非金属矿高值化利用技术研究及示范(2017YFB0310905)
关键词
新型金邦板
强度
水化产物
孔结构
jinbang plate
strength
hydration product
pore structure
