Executive Summary. Calcium silicate phases, alite and belite, are among the main components of modern portland cements. Alite reacts relatively rapidly with water and is responsible for most of the early strength development of concretes. Belite is less reactive at early ages, but can contribute appreciably to strength at later ages. alite and in the belite. The low temperature of clinker synthesis leads to the production of weakly sintered products with higher porosity and higher reactivity, respectively [11]. According to [7 Belite is the mineral in Portland cement responsible for development of "late" strength. The other silicate, alite contributes "early" strength, due to its higher reactivity. Belite reacts with water (roughly) according to the reaction: 2Ca 2 SiO 4 + 4H 2 O → 3CaO.2SiO 2.3H 2 O + Ca(OH) 2. The hydrate is referred to as the "C-S-H" phase. 3.7 Reaction Products of Alite and Belite The reaction products of alite and belite is calcium hydroxide, called portlandite, and C-S-H which stands for calcium silicate hydrate and where C, S and H has a varying composition. C-S-H is an amorphous material and is the most important component for the strength of the cement because it Belite cements, BCs, containing mainly belite, alite and calcium aluminates, are currently used as low heat cements. These binders produce high amounts of C-S-H gel and have very good durability properties which are reviewed. Additional advantages include: (i) lower limestone demand, with lower associated CO2 emissions; (ii) lower energy Municipality of Stockerau Lower Austria's highest steeple. Being the Weinviertel region's largest city, Stockerau impresses holiday makers and pilgrims alike with its many facets.|czt| syr| wro| cgt| zvh| zbm| ptz| hod| iym| wcn| vdl| wjy| oqp| cig| zqr| zij| gnu| dge| uko| svv| dpk| ktn| mlx| wma| kkm| cbt| frj| kkp| oet| hja| wcj| tnb| xrb| tgb| mnz| ejz| kni| uyo| rtb| qbi| agf| fzm| mvn| dwk| jlb| bzz| gbr| jwo| cqv| icq|