New composite grouting materials:Modified urea-formaldehyde resin with cement

作     者：Duan Hongfei Jiang Zhenquan Zhu Shuyun Yao Pu Sun Qiang 

作者机构：School of Resources and Earth ScienceChina University of Mining&TechnologyXuzhou 221116China State Key Laboratory of Geomechanics and Deep Underground EngineeringXuzhou 221008China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2012年第22卷第2期

页      面：195-200页

核心收录：

学科分类：082902[工学-木材科学与技术] 08[工学] 0829[工学-林业工程] 0815[工学-水利工程] 081503[工学-水工结构工程] 

基　　金：the Graduate Developing Innovation Project of Jiangsu Province of China (No. CXZZ11-0306) the Major State Basic Research and Development Program of China (No.2007CB209400) 

主　　题：Modified urea formaldehyde resin A liquidGrouting materialsOrthogonal testGel timeSolidification strength 

摘      要：A new composite two component grout comprised of modified urea-formaldehyde resin and cement was formulated to take account of the advantages and disadvantages of both the cement grout and the chem- ical grout. The new grout is designed for water blocking by reinforcing as well as seepage control by bore grouting. The A component consists of a modified urea-formaldehyde resin A component, some cement, and some water. The B component is an alkaline coagulant. An orthogonal test of four factors at three lev- els showed that gel time increased with increased water content and with urea-formaldehyde resin con- tent. Gel time decreased at increased levels of alkaline coagulant. The A component of this new composite grout is stable over time. A mixed cross-over test showed that as the volume ratio of A to B increases the gel time falls at first but then increases. The solid strength decreases with increasing levels of the B com- ponent. The solid strength increases over time and becomes stable by the 28th day after mixing. The vis- cosity increases with increasing levels of resin A component. The increase is exponential and may be fit to： μ = 8.162e0.0286x.