STUDIES ON TOBERMORITE-LIKE CALCIUM SILICATE HYDRATES
STUDIES ON TOBERMORITE-LIKE CALCIUM SILICATE HYDRATES
复制标题
DOI：
--
复制
发表时间：
1964
期刊：
影响因子：
--
通讯作者：
S. Diamond;W. Dolch;Joe L. White
中科院分区：
文献类型：
--
作者：
S. Diamond;W. Dolch;Joe L. White
PARALLEL STUDIES WERE CARRIED OUT ON CERTAIN CHARACTERISTICS OF CSH /I/ SYNTHESIZED AT ROOM TEMPERATURE AND ON TOBERMORITE GEL PRODUCED BY PASTE OR BOTTLE HYDRATION OF B-C2S, C3S, AND ALITE. INSTRUMENTAL METHODS EMPLOYED INCLUDED X-RAY DIFFRACTION, DTA, INFRARED SPECTROSCOPY, AND ELECTROM MICROSCOPY. SURFACE AREAS OF THE CSH /I/ SAMPLES WERE MEASURED BY WATER VAPOR ADSORPTION, AND HEATS OF ADSORPTION WERE CALCULATED. BOTH CSH /I/ AND TOBERMORITE GEL HAD NEGATIVE SURFACE CHARGE IN THE ABSENCE OF CA /OH/2. A METHOD WAS DEVISED TO MEASURE THE CATION EXCHANGE CAPACITIES OF THESE MATERIALS, WHICH WERE ON THE ORDER OF 5 TO 25 MEQ /100 GM. CSH /I/ APPEARS TO BE A DISTINCT AND REASONABLY HOMOGENEOUS PHYSICOCHEMICAL ENTITY DESPITE COMPOSITIONAL VARIATION, AND SIMILARLY THE TOBERMORITE GEL PRODUCTS APPEAR TO BE MEMBERS OF A DISTINCT PHASE REGARDLESS OF THE PARTICULAR CEMENT MINERAL OR MODE OF HYDRATION USED. THE TWO PHASES EXHIBITED SIMILAR SURFACE PROPERTIES, AND THE PRIMARY PARTICLES OF BOTH SEEMED TO BE INTRINSICALLY CEMENTED INTO MICROAGGREGATES. THE TWO PHASES ARE DIFFICULT TO DIFFERENTIATE BY X-RAY METHODS BUT MAY BE DISTINGUISHED FROM EACH OTHER BY PARTICLE MORPHOLOGY, BY THE INTENSITY OF HIGH- TEMPERATURE EXOTHERM ON DTA, AND TO SOME EXTENT, BY THEIR INFRARED SPECTRA. /AUTHOR/
