Sökning: "hydration of cement"

Visar resultat 6 - 10 av 22 uppsatser innehållade orden hydration of cement.

1. 6. Standardization and optimization of index for 28 day strength for cement made from standard clinker

   Uppsats för yrkesexamina på avancerad nivå, KTH/Kemiteknik

   Författare :Anton Hermansson; [2020]
   Nyckelord :;

   Sammanfattning : This project regards the prediction of 28 day compressive strengths of cement. Using traditional multivariate analysis in combination with Artificial Neural Networks indexes have been developed which makes these predictions possible. LÄS MER

3. 7. Självuttorkning i betong med aluminatrika tillsatsmaterial

   Master-uppsats, Lunds universitet/Avdelningen för Byggnadsmaterial

   Författare :Björn Grahn; Aleksandra Talevska; [2019]
   Nyckelord :Betong; cement; cementpasta; uttorkning; självuttorkning; tillsatsmaterial; aluminatrika tillsatsmaterial; värmeutveckling; ettringit; aluminat; relativ fuktighet; RF; CSA; CA; Technology and Engineering;

   Sammanfattning : This master thesis work concerns the effect of high-alumina additives on the selfdesication of concrete. The purpose of the work was to examine the possibilities to optimize the binder-content of concrete with regards to self-desiccation. Two highalumina additives have been examined. LÄS MER

4. 8. Simulation of Hardening of the MahanaKhon Tower Mat Foundation

   Master-uppsats, KTH/Betongbyggnad

   Författare :Zakaria Kazi-tani; [2019]
   Nyckelord :Hydration; MahanaKhon tower; mat foundation; young concrete; temperature development; thermal stresses; cracking; fly ash; finite element analysis; COMSOL Multiphysics; Hydratation; MahanaKhon tower; bottenplatta; ung betong; temperaturutveckling; termiska spänningar; sprickbildning; flygaska; finita elementanalys; COMSOL Multiphysics;

   Sammanfattning : Cement hydration is the result of a series of simultaneous chemical reactions occurring during the production of concrete. An excessive amount of heat is generated, which consequently may give rise to thermal stresses and cause early age cracks in concrete that may affect its structural integrity, and load bearing capacity. LÄS MER

5. 9. Alternative methods to prevent thermal cracking in concrete

   M1-uppsats,

   Författare :Alexander Barchin; Navid Sedighi; [2019]
   Nyckelord :Massive concrete structures; heat development; cement hydration; temperature reduction; cracking; fly ash; ice; coarse aggregates; cooling methods; practical tests.; Massiva betongkonstruktioner; värmeutveckling; cementhydrataion; temperaturreducering; sprickbildning; flygaska; is; grov ballast; kylningsmetoder praktiska försök.;

   Sammanfattning : In the construction industry, concrete is the most common material, because of its good properties such as compressive strength and endurance. Concrete is a composition of several different materials where one of the main components is cement. When the hydration process starts, large amount of heat is generated. LÄS MER

7. 10. Prediction of early age and time dependent deformations in a massive concrete structure

   Master-uppsats, KTH/Betongbyggnad

   Författare :Ali Aghili; Haris Ribac; [2018]
   Nyckelord :Early age concrete; hydration of cement; Storfinnforsen; ConTeSt; crack risk; temperature development; strain; mass concrete structures; measurement plan; Ung betong; hydratation av cement; Storfinnforsens kraftverk; ConTeSt; sprickrisk; temperatur; töjning; massiva konstruktioner; mätningsplanering;

   Sammanfattning : The heat development that occurs due to the hydration of cement is important to consider during casting of massive concrete structures. By using computer programs that are based on finite element methods (FEM), simulations can be performed on the heat- and strength development. LÄS MER