Reduction of water content in calcium aluminate cement with/out phosphate modification for alternative cementation technique
نویسندگان
چکیده
منابع مشابه
Modification of low-pH calcium aluminate cement to enhance stability for immobilisation of metallic wastes
Cementing systems based on calcium aluminate cement (CAC) have been studied as an alternative cement matrix for the encapsulation of intermediate level wastes (ILW) arising from the nuclear industry. CAC-based systems have great potential for the incorporation of aluminium containing ILW owing to the near-neutral internal pH of these binders. However, CAC-based binders usually undergo phase con...
متن کاملLimestone reaction in calcium aluminate cement–calcium sulfate systems
Article history: Received 18 June 2014 Accepted 7 May 2015 Available online xxxx
متن کاملCALCIUM PHOSPHATE CEMENT: STUDY OF (BETA-TRICALCIUM PHOSPHATE, DICALCIUM PHOSPHATE AND CALCIUM CARBONATE SYSTEM
Calcium phosphate cements (CPCs), using B-tricalcium phosphate (ß-TCP, Ca3 (P04)2), dicalcium phosphate (DCP, CaHP04), calcium carbonate (Ca CO3), and hydroxylapatite (HAp, Ca10(P04)6(OH)2) as powder cement and disodium hydrogen phosphate (Na2HP04) solution as liquid component were prepared. After mixing the powder and liquid constituents, injectable and self-setting calcium phosphate cements (...
متن کاملInvestigation of the effect of phosphate on the physical and microstructural properties of synthetic calcium aluminate cement
The aim of this study was to investigate the synthesis of calcium aluminate cement with and without phosphate additive by combustion synthesis. After preparing the gel from a solution containing aluminum and calcium nitrates and glycine fuel and ammonium dihydrogen Phosphate, its combustion was performed at 400 ° C. X-ray diffraction pattern and thermal analysis of the combustion sample showed...
متن کاملSolidification/stabilization of toxic metals in calcium aluminate cement matrices.
The ability of calcium aluminate cement (CAC) to encapsulate toxic metals (Pb, Zn and Cu) was assessed under two curing conditions. Changes in the consistency and in the setting time were found upon the addition of the nitrates of the target metals. Both Pb and Cu caused a delay in CAC hydration, while Zn accelerated the stiffening of the mortar. Compressive strengths of the metal-doped mortars...
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ژورنال
عنوان ژورنال: Cement and Concrete Research
سال: 2018
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.04.019