The Experts below are selected from a list of 22950 Experts worldwide ranked by ideXlab platform
Binquan Jiao - One of the best experts on this subject based on the ideXlab platform.
-
immobilization of chromite ore processing residue with alkali activated blast Furnace Slag based geopolymer
Ceramics International, 2016Co-Authors: Tao Huang, Faheem Muhammad, Guojing Xu, Ziqiang Zhao, Dongwei Li, S. Li, Lin Yu, Binquan JiaoAbstract:Abstract Chromite ore processing residue (COPR) is an industrial waste produced in the chromic salts production process and contains a small portion of leached Cr(VI), which is highly toxic and is listed as a hazardous waste. The immobilization of COPR using a blast Furnace Slag-based geopolymer has been investigated in this study. The optimum parameters for preparing the blast Furnace Slag-based geopolymer using an orthogonal experiment were obtained. COPR was used to replace the amount of blast Furnace Slag for the preparation of the geopolymer. The COPR-bearing blast Furnace Slag-based geopolymer has potential application as a construction material and for geological disposal. The combined effect of physical fixation, adsorption and ion exchange in the geopolymeric and CSH (calcium silicate hydrate) gel is considered to be the main mechanism, and the reduction of S2− in the blast Furnace Slag played a significant role in the solidification of the COPR.
C Rajasekaran - One of the best experts on this subject based on the ideXlab platform.
-
enhancement of the properties of fly ash based geopolymer paste by incorporating ground granulated blast Furnace Slag
Construction and Building Materials, 2017Co-Authors: Suman Saha, C RajasekaranAbstract:Abstract Research efforts have been made continuously to establish fly ash based geopolymer as an alternative binder material for the production of fresh concrete because production of Ordinary Portland Cement degrades the environment by huge emissions of carbon-di-oxide and also by consuming lot of natural resources. But most of the study reveals, fly ash based geopolymer paste needs more time to get set when it is cured at ambient temperature. As a result, it is quite impractical to use fly ash based geopolymer paste as an alternative to Ordinary Portland Cement in faster construction. In this study, an effort has been made to enhance the properties of fly ash based geopolymer paste by incorporating ground granulated blast Furnace Slag at various percentage levels. Microstructure of the geopolymer paste is studied using Scanning Electron Microscopy. Result of this investigation shows that significant improvement on setting time and compressive strength can be obtained by adding ground granulated blast Furnace Slag in the mixes.
Feng Naixiang - One of the best experts on this subject based on the ideXlab platform.
-
crystallization and coarsening kinetics of rutile phase in modified ti bearing blast Furnace Slag
Industrial & Engineering Chemistry Research, 2012Co-Authors: Zhang Juhua, Feng NaixiangAbstract:Crystallization and coarsening kinetics of nonisothermal precipitation process of rutile in modified Ti-bearing blast Furnace Slag were discussed. The modified Slag was analyzed by X-ray diffractio...
Hanifi Binici - One of the best experts on this subject based on the ideXlab platform.
-
mechanical and radioactivity shielding performances of mortars made with colemanite barite ground basaltic pumice and ground blast Furnace Slag
Construction and Building Materials, 2014Co-Authors: Hanifi Binici, Orhan Aksogan, Ahmet Hayrullah Sevinc, A KucukonderAbstract:Abstract All building materials contain more or less natural radioactivity. The present paper reports the results of an experimental study on the mechanical and radiological aspect of the use of colemanite, barite, ground basaltic pumice and ground blast Furnace Slag as additives in the production of special mortars. The results show that the compressive and flexural strengths of the mortars at later ages has increased significantly by using blast Furnace Slag as an additive. However, the compressive strength was lower than those of the reference samples for all the samples with different additive percentages of pumice and barite for all ages. Linear absorption coefficient decreased in samples with colemanite additive with increasing colemanite ratio. From the linear absorption experiments, increases in the coefficient were observed in the samples with blast Furnace Slag at the beginning, but opposite effect starts for values higher than 2.5%. Mortars with colemanite and blast Furnace Slag had low radioactive permeability. These samples should be preferred for places which are exposed to radioactive effect. The linear absorption coefficients of samples with 5% pumice additive were very near to those of the samples with barite additive. Hence pumice may be used in regions where radiation is effective. It can easily be used in walls and coverings of medical buildings and nuclear reactors.
-
investigation of durability properties of concrete pipes incorporating blast Furnace Slag and ground basaltic pumice as fine aggregates
Scientia Iranica, 2012Co-Authors: Hanifi Binici, Muhammed Yasin Durgun, Tamer Rizaoglu, M KolucolakAbstract:Abstract In this study, the effects of using blast Furnace Slag, ground basaltic pumice and blast Furnace Slag + ground basaltic pumice as fine aggregates, on the durability of concrete pipes, were investigated. Blast Furnace Slag, ground basaltic pumice, and equal amounts of blast Furnace Slag and ground basaltic pumice were used at 5%, 10% and 15%, by weight, in place of fine aggregate, in mixes. The durability of concrete pipes has been tested, according to standard procedures. The sulfate resistance and permeability of the reference specimen and the specimen with admixtures were investigated. It was observed that the ultimate load of specimens depends on the type and percentage of admixtures. The maximum ultimate load was obtained in concrete specimens containing 5% blast Furnace Slag and 5% ground basaltic pumice, which was 20% larger than that of the reference concrete specimens. Furthermore, concrete specimens with 10% ground basaltic pumice were found to have the highest sulfate resistance.
Zhancheng Guo - One of the best experts on this subject based on the ideXlab platform.
-
Recovery of rutile from Ti-Bearing blast Furnace Slag through phase transformation and super-gravity separation for dielectric material
Ceramics International, 2020Co-Authors: Jintao Gao, Xi Lan, Zhancheng GuoAbstract:Abstract High-purity rutile (TiO2) possessing favorable dielectric properties was sustainably recovered from Ti-bearing blast Furnace Slag through phase transformation and super-gravity separation in this study. Firstly, the phase transformation behavior of Ti was studied, the favorable conditions for transformation from perovskite to rutile were determined, and the Ti elements were efficiently enriched into rutile in the Ti-bearing blast Furnace Slag. Subsequently, the condition for solid and liquid phases of rutile and Slag in coexistence was acquired by high-temperature CSLM, the rutile was effectively recovered from the Ti-bearing blast Furnace Slag through super-gravity separation, and its high purity was verified by the results of XRD, SEM-EDS, XRF, EPMA and Raman. Moreover, the rutile ceramic was prepared, and its dielectric properties were investigated, the dielectric constant was up to around 200, and the dielectric loss was as low as 0.0047 at about 900 Hz. The excellent frequency stability, high dielectric constant and low dielectric loss of the rutile recovered from Ti-bearing blast Furnace Slag reflect its favorable energy storage capability for dielectric material.
