煤矸石质硅铝基胶凝材料的试验研究

为提高煤矸石的综合利用率，以500 ℃煅烧的煤矸石为主体原料，附以改性硅酸钠溶液为成岩剂，研制煤矸石质硅铝基胶凝材料.利用煤矸石与矿渣、粉煤灰之间的协同效应在常规条件下制备出强度持续增长（62.10 MPa，3 d； 93.15 MPa，90 d）、施工性能良好的胶凝材料.通过X射线衍射、IR和MAS NMR对全煤矸石硅铝基胶凝材料进行研究，煤矸石质硅铝基胶凝材料在水化前后Si，Al价键和配位发生了改变，表征有水化产物生成，进一步验证水化产物有水白云母、C-S-H凝胶和类沸石无定性铝硅酸盐凝胶.根据煤矸石硅铝基胶凝材料的特征提出了原位键合的水化机理.

Study on gangue-containing aluminosilicate based cementitious materials

High performance gangue-containing aluminosilicate based cementitious materials were produced with gangue calcined at 500 ℃ and modified alkali silicates solutions as diagenetic admixture. Cementitious materials with compressive strength growth increasingly (62.1 MPa curing for 3 d and 93.15 MPa curing for 90 d ) and favorable construction performance were produced through making full use of  the synergistic effect of the compound of gangue, slag and fly ash. Gangue-containing aluminosilicate based cementitious materials were studied by the methods of XRD, SEM, IR and MAS NMR. The results show that the change of valence-bond and coordination changes for Si and Al. Muscovite, C-S-H gel and a zeolite-like material were found in hydration production. Based on the properties of gangue-containing aluminosilicate based cementitious materials, in situ bonding hydration mechanism was put forward.