Tectoaluminosilicate cement and a process for its manufacture
    1.
    发明授权
    Tectoaluminosilicate cement and a process for its manufacture 失效
    组合硅铝酸盐水泥及其制造方法

    公开(公告)号:US5372640A

    公开(公告)日:1994-12-13

    申请号:US855014

    申请日:1992-06-09

    摘要: A tectoaluminosilicate cement which consists of K, Ca and aluminosilicates plus, optionally, Li, Na and Mg, contains: a phyllosilicate dehydroxylated at a temperature between 500.degree. and 900.degree. C., reactive amorphous silica, reactive calcium silicate glass or reactive calcium aluminosilicate glass with a Ca:Si ratio of .gtoreq.1 and alkali silicate with the total formula: a(M.sub.2 O) * x(SiO.sub.2) * y(H.sub.2 O) in which M=Li, Na or K, a=0-4, x=0-5 and y=3-20, the overall Si:Al ratio being .gtoreq.1. The tectoaluminosilicate cement preferably alkali hydroxide. The dehydroxylated phyllosilicate is a metakaolin giving tectosilicate structures. The reactive amorphous silica is a dealuminated phyllosilicate, a fly ash dealuminated with mineral acids, where applicable, a fine-grained crystalline form of SiO.sub.2 contained in calcinated clays, a silicic acid gel, thermally activated by alkali-activated aluminosilicate, obtained by sintering an aluminosilicate with alkali carbonate at a temperture between 800.degree. and 1,200.degree. C., the alkali and aluminosilicate components being mixed in the ratio 1:6 to 1:1, and/or microsilica ("silica fume"). The alkali metal activator may be prepared in situ from the dealuminated phyllosilicate and/or from the silicic acid gel in the presence of the alkali hydroxide. A bonding matrix obtained from the tectoaluminosilicate cement by reacting with water in the ratio 3:1 to 6:1 consists essentially of the formula: (Li, Na).sub.0-7 K.sub.1-6 Mg.sub.1-0 Ca.sub.3-0 [Al.sub.4 Si.sub.6-14 O.sub.21-36 ].(0-15H.sub.2 O).

    摘要翻译: PCT No.PCT / EP91 / 01607 371日期:1992年6月9日 102(e)日期1992年6月9日PCT 1991年8月24日PCT PCT。 出版物WO92 / 04300 日期:1992年3月19日。由K,Ca和硅铝酸盐以及任选的Li,Na和Mg组成的组合硅铝酸盐水泥含有:在500-900℃的温度下脱羟基化的页硅酸盐,反应性无定形二氧化硅,反应性 硅酸钙玻璃或Ca:Si比值大于等于1的反应性硅铝酸钙玻璃和碱金属硅酸盐,总配方为:(M 2 O)* x(SiO 2)* y(H 2 O),其中M = Li,Na或K ,a = 0-4,x = 0-5和y = 3-20,Si:Al比的总和大于等于1。 组合硅铝酸盐水泥优选碱金属氢氧化物。 脱羟基化的页硅酸盐是给出晶体硅酸盐结构的偏高岭土。 反应性无定形二氧化硅是脱铝页硅酸盐,与无机酸脱铝的飞灰,在适用的情况下,煅烧粘土中含有的细晶粒SiO 2,通过碱活化的硅铝酸盐热活化的硅酸凝胶,其通过烧结 铝硅酸盐与碱金属碳酸盐在800至1200℃之间的温度下,碱和硅铝酸盐组分以1:6至1:1的比例混合,和/或微硅粉(“硅粉”)。 碱金属活化剂可以在碱金属氢氧化物的存在下从脱硅页硅酸盐和/或从硅酸凝胶原位制备。 通过与水以比例为3:1至6:1的比例从组合硅铝酸盐胶浆获得的粘结基质基本上由式(Li,Na)0-7K1-6Mg1-0Ca3-0 [Al4Si6-14O21-36]组成。 (0-15H2O)。