摘要
以粉煤灰和铸造粉尘为主要原料,以KOH、NaOH、Na2SiO3、K2SiO3和水玻璃为碱激发剂,制备地质聚合物。研究了不同激发剂对铸造粉尘-粉煤灰基地质聚合物抗压强度的影响。结果表明:不同浓度的NaOH和KOH溶液的激发效果较差,制备的铸造粉尘-粉煤灰基地质聚合物的抗压强度较低。NaOH和KOH溶液与K2SiO3溶液混配复合激发剂可提高铸造粉尘-粉煤灰基地质聚合物的抗压强度。水玻璃溶液激发效果最好,随着水玻璃溶液模数的增加,铸造粉尘-粉煤灰基地质聚合物的抗压强度逐渐提高;当水玻璃模数为1.2时,铸造粉尘基地质聚合物28 d抗压强度达到最大,为21.4 MPa;继续增大水玻璃模数,铸造粉尘-粉煤灰基地质聚合物28 d抗压强度趋于下降。
Casting dust-fly ash based geopolymer has been synthesized by using fly ash and casting dust as main raw materials,KOH,NaOH,Na2SiO3,K2SiO3 and water glass as activators.The effects of different alkali-activators on compressive strength of casting dust-fly ash based geopolymer were studied.The study showed that the activation effects of NaOH and KOH solution with different concentration are weak and the compressive strength of casting dust-fly ash based geopolymer is low.The activation effects are enhanced when NaOH or KOH solution mixes with K2SiO3 solution,and the compressive strength improves too.The water glass solution shows the best activation effect,the compressive strength of casting dust-fly ash based geopolymer increases with increasing modulus of water glass solution.When the modulus of water glass solution is 1.2,the 28 d compressive strength is 21.4 MPa.The compressive strength of geopolymer decreases with the increase of the modulus when it is greater than 1.2.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第6期1037-1042,共6页
Bulletin of the Chinese Ceramic Society
