摘要
以P.O 42.5普通硅酸盐水泥为原料,通过添加植物蛋白复合型水泥发泡剂制备出了高性能泡沫混凝土,研究了发泡剂和水的体积比对泡沫混凝土的孔径分布、容重、吸水率、力学性能和保温性能的影响。结果表明,随着发泡剂和水的体积比增大,泡沫混凝土的气孔尺寸增大,气孔的外形逐渐趋近于圆孔状,气孔的完整度增加,容重持续降低,吸水率持续增大。当V(发泡剂)∶V(水)=4∶80时,孔形状因子最小为1.351,孔隙形状最趋近于球形。随着发泡剂和水的体积比增大,泡沫混凝土的抗压强度和抗折强度先增大后减小,导热系数先降低后增大。当V(发泡剂)∶V(水)=4∶80时,泡沫混凝土的孔径尺寸分布最为均匀,其抗压强度和抗折强度均为最大值,分别为8.16和1.29 MPa,导热系数最低为0.163 W/(m·K),力学性能和保温性能最优。
Using P.O 42.5 Portland cement as raw material,high-performance foam concrete was prepared by adding plant protein composite cement foaming agent.The influence of the volume ratio of foaming agent and water on the pore size distribution,the unit weight,water absorption,mechanical properties and thermal insulation properties of foam concrete was studied.The results show that with the increase of the volume ratio of foaming agent and water,the pore size of foam concrete increases,the pore shape gradually tends to be round,the integrity of pores increases,the unit weight continues decreasing,and the water absorption continues increasing.When V(foaming agent):V(water)=4∶80,the minimum pore shape factor is 1.351,and the pore shape is closest to spherical.With the increase of the volume ratio of foaming agent and water,the compressive strength and flexural strength of foam concrete first increase and then decrease,and the thermal conductivity first decreases and then increases.When V(foaming agent):V(water)=4∶80,the pore size distribution of foam concrete is the most uniform,its compressive strength and flexural strength are the maximum values,respectively 8.16 and 1.29 MPa,and the thermal conductivity is the lowest 0.163 W/(m·K).The mechanical properties and thermal insulation properties are optimal.
作者
胡宝春
付春雨
李珊珊
HU Baochun;FU Chunyu;LI Shanshan(School of Civil and Transportation Engineering,Hohai University,Nanjing 210000,China;China Communications Second Public Railway Construction Co.,Ltd.,Xi'an 710000,China;Nanjing Transportation Comprehensive Administrative Law Enforcement and Supervision Bureau,Nanjing 210000,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第2期2181-2186,2200,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(51508155)。
关键词
泡沫混凝土
发泡剂
孔径分布
力学性能
导热系数
foam concrete
foaming agent
pore size distribution
mechanical properties
thermal conductivity
作者简介
通讯作者:胡宝春,E-mail:liu_wxia@126.com;胡宝春(1971-),男,高级工程师,主要从事新型材料及桥梁工程等相关研究。
