摘要
将玉米化工醇釜残物开发为新型的生物基减水剂,采用傅里叶变换红外光谱(FTIR)对其进行表征.结合X射线衍射(XRD)图谱分析和扫描电镜(SEM)研究生物基减水剂对水泥水化产物生成和微观形貌的影响,进一步从ζ-电位、减水率、凝结时间和抗压强度分析生物基减水剂对水泥水化进程的影响规律,并探讨了其作用机理.结果表明:引入醚键和磺酸基团的生物基减水剂减缓了水泥初期水化进程,促进了水泥后期水化,对水泥颗粒有很好的分散效果;掺加生物基减水剂的水泥浆体较空白样初凝、终凝时间分别延长了92,110min,减水率可达24.3%(质量分数),但并不影响水泥硬化体的抗压强度,其28d抗压强度可达到42.7MPa.生物基减水剂提高了硬化水泥的力学性能和耐久性.
A novel biosuperplasticizer with corn polyols residue（CPR） was proposed and characterized by Fourier transform infrared spectroscopy（FTIR）. Combined with Xray diffraction intensity（XRD） analysis and scanning electron microscope（SEM）, the effects of biosuperplasticizer on development and morpholo gy of cement hydration products were investigated, and further the hydration process and regulation mech anism were analyzed. Moreover, function mechanism of biosuperplasticizer was discussed. The result in dicates that the early hydration of cement is retarded by biosuperplasticizer where ether bond and sulfonic acid groups are introduced, however ,the late cement hydration can be promoted, and the dispersion ability of corn polyols residue based plasticizer（CPRP） in cement paste is better. In addition, the initial setting and final set time of cement paste admixed with biosuperplasticizer extends for 92 and 110 rain, respec tively as compared to the control; the water reducing ratio of cement attained to 24.3%（by mass）, but it does not affect the development of compressive strength of the hardened cement paste, compressive strength of 28 d is 42. 7 MPa. Biosuperplasticizer improves the mechanical properties and durability of hardening cement paste.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2013年第2期185-190,共6页
Journal of Building Materials
基金
吉林省科技发展计划基金资助项目(20080227)
长春市国际科技合作计划项目(2010081)
关键词
玉米化工醇釜残物
生物基减水剂
水化进程
作用机理
corn polyols residue（CPR）
bio-superplasticizer
hydration process
function mechanism
作者简介
第一作者：薛冬桦（1956-），女，吉林长春人，长春工业大学教授，博士．E-mail：xuedonghua@mail．ccut．edu．cn
