中南大学学报（自然科学版）2018，Vol.49Issue(5)：1054-1061,8.DOI:10.11817/j.issn.1672-7207.2018.05.005
硬脂酸钙稳泡机制及其对发泡水泥保温板泡孔结构的影响
Foam stabilizing mechanism of calcium stearate and its effects on pore structure of foam cement thermal insulation board
摘要
Abstract
Light weight foam cement thermal insulation board was prepared by using self-made composite foam stabilizer with calcium stearate as principal component. The foam stabilizing mechanism of the calcium stearate in chemical foaming cement was proposed by studying the effects of calcium stearate on foam stability, hydrophobicity and pore structure. The results show that the foam stabilizing mechanism is that cement particles are firstly absorbed by calcium stearate and then partly presented hydrophobic, and subsequently they are absorbed on gas-liquid interface of the bubbles to achieve a stable equilibrium state of the bubbles. The as-prepared lightweight foam cement thermal insulation board using self-made composite foam stabilizer meets the requirements of the national standard. The absolute dry density is 220 kg/m3, the compressive strength reaches 0.63 MPa, the thermal conductivity is 0.042 W/(m·K) and the water absorption rate after 28 d of curing period is only 9.8%.关键词
建筑材料/硬脂酸钙/稳泡剂/发泡水泥保温板/泡孔结构Key words
building materials/calcium stearate/foam stabilizer/foamed cement insulation board/pore structure分类
化学化工引用本文复制引用
刘萍,唐爱东,王健雁,艾陈祥,张崇,冼诗翔,潘春跃..硬脂酸钙稳泡机制及其对发泡水泥保温板泡孔结构的影响[J].中南大学学报（自然科学版）,2018,49(5):1054-1061,8.基金项目
国家自然科学基金资助项目(51674293,51374250) （51674293,51374250）
中南大学大学生创新类校级米塔尔创新项目(MX2016428) （MX2016428）
大学生自由探索项目(ZY2016563)(Projects(51674293,51374250)supported by the National Natural Science Foundation of China （ZY2016563）
Project(MX2016428)supported by the College Students'Innovative Mittal Innovation of Central South University （MX2016428）
Project(ZY2016563)supported by the College Students'Free Exploration) （ZY2016563）
