Abstract:
The invention concerns a method for making geopolymeric cement consisting in producing a reaction mixture containing (parts in weight of dry matter): reagent (I): 100 parts by weight of aluminosilicate oxide [Si2O5,Al2O2]9[Si2O5,Al2(OH)3], or simplified below as (Si2O5Al2O2)(IV-V); reagent (II): 30-55 parts of alkali silicate in which the mol ratio M2O/SiO2 ranges between 0.5 and 0.8, M representing Na and/or K or the mixture Na+K; reagent (III): 80-110 parts of basic silicate, in glass state, consisting partly of gehlenite, akermanite and wollastonite; reagent (IV): 150-250 parts of alkali aluminosilicate containing at least 5 % by weight of (Na2O+K2O), preferably at least 8 % by weight; then in hardening said mixture by adding water: After hardening the geopolymeric cements are made of two distinct phases: a) a glass phase having a MAS NMR spectrum for Si with a band ranging between -85 and -89ppm, and a MAS NMR spectrum for Al with a resonance at 54-58ppm; b) a crystalline phase having a MAS NMR spectrum for Si with a band ranging between -90ppm and -115ppm, and a MAS NMR spectrum for Al with a resonance at 57ppm.
Abstract translation:本发明涉及一种制造地质聚合物水泥的方法,该方法包括制备含有(重量份干物质)的反应混合物:试剂(I):100重量份的硅铝酸盐氧化物[Si 2 O 5,Al 2 O 2] 9 [Si 2 O 5,Al 2(OH)3],或简化为(Si 2 O 5 Al 2 O 2)(IV-V)。 试剂(II):30-55份其中M 2 O / SiO 2的摩尔比在0.5和0.8之间的碱性硅酸盐,M代表Na和/或K或混合物Na + K; (III):80-110份玻璃状碱性硅酸盐,部分由鹅耳石,白云母和硅灰石组成; 试剂(IV):150-250份含有至少5重量%(Na 2 O + K 2 O),优选至少8重量%的碱性硅铝酸盐; 然后通过加入水来硬化所述混合物:硬化后,地质聚合物粘合剂由两个不同的相组成:a)具有范围在-85和-89ppm之间的<29> Si的MAS NMR谱的玻璃相和MAS 共振为54-58ppm的<27> Al的NMR光谱; b)具有范围在-90ppm至-115ppm之间的<29> Si的MAS NMR光谱的结晶相和具有57ppm共振的27Ma的MAS NMR光谱。
Abstract:
Die vorliegende Erfindung betrifft die Verwendung von Isoalkangemischen zur Reduzierung bzw. Minimierung der Staubemission beim Umgang mit pulverförmigen bau-chemischen Produkten, ein Verfahren zur Herstellung der pulverförmigen bauchemischen Produkte, sowie hydraulisch abbindende Massen, enthaltend die erfindungsgemäßen Isoalkangemische.
Abstract:
A cured calcium silicate object which has a bulk specific gravity of 0.2 to 0.7, excluding 0.7, has, despite its lightweight properties, a high strength making the object suitable for use as a building material without the need of a reinforcement such as a reinforcing iron bar, has high crystallizability and hence excellent long-lasting durability, and is excellent in surface smoothness and processability including suitability for sawing; and a process for producing the cured object. The cured calcium silicate object is characterized by: giving an X-ray powder diffractometry pattern in which the peak diffraction intensity Ib attributable to the (220) plane of tobermorite and the minimum diffraction intensity Ia in the angle range between the two diffraction peaks respectively attributable to the (220) plane and (222) plane of tobermorite satisfy the relationship Ib/Ia>3; having a bulk specific gravity of 0.2 to 0.7, excluding 0.7; and containing substantially no cells having a maximum diameter exceeding 200 mu m.
Abstract:
The geopolymeric alumino silicates have been grouped in three families depending on the atomic ratio Si/Al which may be 1, 2 or 3. With the most commonly used simplified notation, a distinction is made between poly(sialate) Mn(-Si-O-Al-O-)n or (M)-PS; poly(sialate-siloxo) Mn(-Si-O-Al-O-Si-O-)n or (M)-PSS; and poly(sialate-disiloxo) Mn(-Si-O-Al-O-Si-O-Si-O-)n or (M)-PSDS. The object of the invention is to describe a process for obtaining a geopolymer of the alkaline poly(sialate-disiloxo) family (M)-PSDS with the ratio Si/Al=3. It consists in reacting a geopolymeric resin obtained from a reactional mixture containing: a) an aqueous solution of alkaline silicate with a molar ratio SiO2:MnO between or equal to SiO2:M2O 4.0:1 and 6.5:1 the concentration of which is over 60 % wt and where the initial viscosity at 20 DEG C is 200 centipoises, then increases not to exceed 500 centipoises before 5 hours at 20 DEG C; b) an alumino silicate oxide (Si2O5,Al2O2) in which the Al cation is in coordination (IV-V) as determined by the MAS-NMR spectrum for Al, said oxide being in such a quantity that the molar ratio Al2O3:SiO2 is between or equal to 1:5.5 and 1:6.5, and then letting said geopolymeric resin cure. As against the prior art, the fact that there is no need to add fillers to prevent the geopolymeric matrix from cracking makes it possible to keep a very low viscosity in the geopolymeric resin and develop its film-forming property, which is a distinct advantage when fibres or other granular materials are to be impregnated.
Abstract translation:根据Si / Al的原子比可能是1,2或3,地质聚合硅酸铝已经分成三个族。以最常用的简化符号,区分了聚(唾液酸酯)Mn(-Si-O -Al-O-)n或(M)-PS; 聚(唾液酸酯 - 硅氧烷)Mn(-Si-O-Al-O-Si-O-)n或(M)-PSS; 和聚(唾液酸酯 - 二硅氧烷)Mn(-Si-O-Al-O-Si-O-Si-O-)n或(M)-PSDS。 本发明的目的是描述以Si / Al = 3的比例获得碱性聚(唾液酸酯 - 二硫代)(M)-PSDS的地质聚合物的方法。 它包括将由反应混合物获得的地质聚合物树脂反应,所述反应混合物包含:a)碱性硅酸盐的水溶液,SiO 2 :MnO摩尔比等于SiO 2 :M 2 O 4.0:1和6.5:1,其浓度超过60 %wt,20℃时的初始粘度为200厘泊,在20℃下5小时之前增加不超过500厘泊; b)通过MAS-NMR光谱测定的AlAl阳离子配位(IV-V)的铝硅酸盐氧化物(Si 2 O 5,Al 2 O 2),所述氧化物的量为Al 2 O 3的摩尔比 :SiO2为1:5.5和1:6.5之间,然后使所述地质聚合物树脂固化。 与现有技术相比,不需要添加填料以防止地质聚合物基质破裂的事实使得可以在地质聚合物树脂中保持非常低的粘度并显现其成膜性,这是显着的优点,当 纤维或其他颗粒材料被浸渍。
Abstract:
An additive for alkali metal silicate solutions, comprising a quaternary ammonium compound having the general formula (1) R 1 R 2 R 3 R 4 N + OH - , wherein R 1 , R 2 , R 3 and R 4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms, or groups having the general formula -[CH 2 ]n- N + R 5 R 6 R 7 wherein n is an integer having a value of from 1 to 12, the group - [CH 2 ]n may be hydroxy-substituted, and R 5 , R 6 and R 7 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups or hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms; with the proviso that at least one of the groups R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 represents a hydroxy-substituted alkyl group or a hydroxy-substituted alkaryl group comprising at least 2 carbon atoms wherein the hydroxy substituent is not located on a carbon atom which is bonded to a nitrogen atom.
Abstract translation:碱金属硅酸盐溶液的添加剂,其包含具有通式(1)的季铵化合物,其中R 1,R 2,R 3和R 4可以相同或不同,表示烷基,羟基取代 烷基,烷芳基,含有1至12个碳原子的羟基取代的烷芳基,或具有通式 - [CH 2] n - N + R 6 R 7的基团,其中n是具有1至12的整数, 基团 - [CH 2] n可以是羟基取代的,可以相同或不同的R 5,R 6和R 7表示包含1至12个碳原子的烷基,羟基取代的烷基,烷芳基或羟基取代的烷芳基 ; 条件是R1,R2,R3,R4,R5,R6和R7中的至少一个表示羟基取代的烷基或含有至少2个碳原子的羟基取代的烷芳基,其中羟基取代基不位于 在与氮原子键合的碳原子上。
Abstract:
Die Erfindung betrifft ein einphasiges hydraulisches Bindemittel, das Silizium-, Calcium-, Sauerstoff- und Wasserstoff -Atome in einer Anordnung enthält, die Silikat-Baueinheiten mit einem mittleren Vernetzungsgrad von höchstens Q 1,5 und Silanol -Gruppen umfasst, wobei kein oder ein Teil der Calcium-Atome durch ein sechsfach oder höher mit Sauerstoff koordiniertes Metall-Atom M[6] x+ und/oder kein oder ein Teil der Silizium-Atome durch ein tetraedrisch mit Sauerstoff koordiniertes Metall-Atom M[4] y+ ersetzt sind, das molare Verhältnis [CaO + (x/2) • (M[6] x+ O x/2 )] : [SiO 2 + M[4] y+ O y/2 ] einen Wert von 0,75 bis 2,75 aufweist und das Bindemittel 3,5 Gew.% bis 20 Gew.% H2O enthält, sowie ein dieses Bindemittel enthaltendes Gemisch. Die Erfindung betrifft weiterhin Verfahren zur Herstellung des Bindemittels oder eines dieses Bindemittel enthaltendes Gemisch durch Umwandeln von calcium- und silikathaltigen Ausgangsstoffen in ein Vorprodukt, das zumindest teilweise ein Calcium-Hydroxo- Silikat enthält, anschließendem Mahlen des Calcium-Hydroxo-Silikats, bis sich das einphasige hydraulische Bindemittel bildet, und ggf. Trocknen des Bindemittels auf einen H2O-Gehalt von 3,5 Gew.% bis 20 Gew.%. Die Erfindung betrifft schließlich einen Baustoff, der durch Abbinden des Bindemittels oder eines dieses Bindemittel enthaltenden Gemischs mit Wasser und anschließendem Aushärten entsteht.
Abstract translation:本发明涉及在数组中的单相水硬性粘合剂,硅,钙,氧和氢-atoms含有包含具有至多Q1,5和硅烷醇基团的平均程度的交联,其中没有或者有部分硅酸盐结构单元 钙原子通过六倍或多个氧配位的金属原子置换M [6] X +和/或没有或由具有氧 - 金属原子M [4 - ] Y四面体配位的,所述摩尔取代的硅原子+的一部分 比[(M [6] X +牛/ 2)+的CaO(X / 2)]:具有[二氧化硅+ M [4] Y + Oy公司/ 2]的0.75的速率2.75和粘合剂3 ,5重量%至20重量%的包含H 2 O,以及含有这种粘合剂的混合物。 本发明还涉及用于制备该粘合剂,或由其中至少部分含有钙羟硅酸盐,钙羟 - 硅酸盐的随后的研磨,直到前体转换钙和含硅酸盐的原料含有混合物的粘合剂 形式单相水硬性粘合剂,以及3.5重量%的H 2 O含量的粘结剂任选地干燥至20重量%。 最后,本发明涉及由所述的粘合剂或与水和随后的固化含粘合剂的混合物的设定产生的结构材料。
Abstract:
Method for eliminating the dangerous alkali-aggregate reaction in concrete which contains hydrated cement obtained by the alkaline activation of Portland cement. The formation in this concrete of a compound which can generate a soluble alkaline aluminate is prevented by reacting a mineral composition by alkaline activation, said compound being composed of a hydrated alkaline alumino-silicate identifiable by its analysis spectrum in Nuclear Magnetic Resonance (MAS-NMR) for Al of which the resonance at 66+/-5ppm corresponds to a Q3(3Si)-type (Al04) tetrahedron. The above-mentioned mineral composition contains: a) 100 parts by weight of said calcium alumino-silicate; b) 10-30 parts by weight of powdered synthetic alumino-silicates belonging to the class of silicates whose mineralogical structure is lamellar and whose MAS-NMR for Al has at least one main resonance at 20+/-5ppm and/or 50+/-5ppm in relation to AlCl3; c) 0-10 parts by weight of a hydrated disilicate Ca(H3SiO4)2 whose (SiO4)tetrahedron polymerization degree is (Q1) as determined by the value of the MAS-NMR spectrum for Si. The mineral composition is a geopolymetric quick setting cement characterized after alkaline activation by its MAS-NMR spectrum for Al which has a resonance equal to 55+/-5ppm in relation to AlCl3, corresponding to a Q4(4Si)-type (AlO4)tetrahedron, and a resonance of 0+/-5ppm in relation to AlCl3, corresponding to the VI(AlO6) coordinated Al cation in alumina hydroxide and/or hydrated calcium thioaluminate (ettringit). The ratio between the intensity of the 55+/-5ppm resonance of Q4(4Si)-type (AlO4) and the intensity of the 0+/-5ppm resonance of (AlO6), (AlO4)/(AlO6) is equal to or between 0.1 and 1.