作　　者： (何卓名）; (邹家强）; (刘爱华）; (王海洋）;

机构地区： 华南农业大学水利与土木工程学院,广州510642

出　　处： 《广东公路交通》 2017年第4期6-10,19,共6页

摘　　要： 研究以水玻璃(即Na_2SiO_3溶液)为主的碱激发剂对偏高岭土为原料制备的地聚合物物理力学性能的影响。研究结果表明:随着水玻璃模数的逐渐提高,偏高岭土基地聚合物的抗折及抗压强度呈现先升高后下降的趋势;当水玻璃模数为1.30时,地聚合物达到最大抗折和抗压强度;地聚合物浆体流动性随水玻璃模数的增大呈现先增加后减少最后趋于平稳的趋势,模数为1.00时,浆体流动性最好;凝结时间则随模数的增大而逐渐增长。根据实际要求来选择配制激发剂的模数,达到既不浪费原材料又能满足力学性能要求的目的。此外,不同的水玻璃模数对地聚合物的密度并无明显影响。 The mechanical properties of met kaolin based geopolymers were studied under the effect of sodium silicate modulus of the alkali activator. The results show that with the gradual improvement of the modulus,the fracture strength and compressive strength of metakaolin based geopolymers showed a trend of increasing first and then decreasing. When the modulus goes to 1.30, the geopolymers achieves maximum fracture and compressive strength. The flow ability of geopolymers first increases then decrease and finally go steady while the modulus increasing. The setting time of geopolymers gradually prolong with the increase of modulus. Choosing the modulus based the discovery of this experi-ment and actual engineering requirement can save raw materials as well as meeting mechanical properties requirement. Besides, sodium silicate modulus does not cause any obvious influence to its density.

关 键 词： 碱激发剂 偏高岭土 地聚合物 水玻璃模数 力学性能