scholarly journals A STUDY ON VALIDATION OF COMBINED METHOD OF CRYSTALLIZATION BY HEAT TREATMENT AND QUANTITATIVE XRD-REITVELD METHOD FOR DETERMINING HYDRATION DEGREE OF BLAST-FURNACE-SLAG IN SLAG-BLENDED CEMENT

2015 ◽  
Vol 69 (1) ◽  
pp. 76-81
Author(s):  
Rena ISHIKAWA ◽  
Toyoharu NAWA ◽  
Takahiro SAGAWA
Keyword(s):  
Heat Treatment ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Blended Cement ◽  
Combined Method ◽  
Hydration Degree ◽  
Furnace Slag

scholarly journals Hydration degree development of blast furnace slag blended cement pastes using thermogravimetric Analysis (TGA)

2018 ◽  
Vol 163 ◽  
pp. 04001 ◽  
Author(s):  
Walid Deboucha ◽  
Nordine Leklou ◽  
Abdelhafid Khelidj
Keyword(s):  
Blast Furnace ◽  
Thermogravimetric Analysis ◽  
Activity Coefficient ◽  
Blast Furnace Slag ◽  
Blended Cement ◽  
Hydration Degree ◽  
Cement Pastes ◽  
Mineral Additives ◽  
Furnace Slag

The hydration degree assessment of slag blended cement pastes with three different replacement levels (10, 20 and 40%) and two finenesses (400 and 500 m2/kg) was investigated. The hydration degree was evaluated by using a modified TG method suggested by Deboucha et al., 2017. This method builds on the activity coefficient concept, which makes it possible to assume the amount of mineral additives that contribute to hydration reactions as well as cement. Results showed that the efficiency of blast furnace slag in developing hydration degree was conditioned by its level of replacement and fineness.

A blended cement containing blast furnace slag and phosphorous slag

2002 ◽  
Vol 17 (2) ◽  
pp. 62-65 ◽  
Author(s):  
Li Dong-xu ◽  
Chen Lin ◽  
Xu Zhong-zi ◽  
Luo Zhi-min
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Blended Cement ◽  
Phosphorous Slag ◽  
Furnace Slag

scholarly journals Optimization of heat treatment of glass-ceramics made from blast furnace slag

2020 ◽  
Vol 39 (1) ◽  
pp. 539-544
Author(s):  
Yi-Ci Wang ◽  
Pei-Jun Liu ◽  
Guo-Ping Luo ◽  
Zhe Liu ◽  
Peng-Fei Cao
Keyword(s):  
Heat Treatment ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Orthogonal Experiment ◽  
Glass Ceramics ◽  
Iron And Steel ◽  
Heat Treatment Regime ◽  
Main Crystalline Phase ◽  
Optimum Heat ◽  
Furnace Slag

AbstractCaO–MgO–Al2O3–SiO2 glass-ceramics with diopside as the main crystalline phase were prepared by melting blast furnace slag obtained from Baotou Iron and Steel Company. The effect of heat treatment on the crystallization behavior of glass-ceramics, containing a large proportion of melted blast furnace slag, was studied by means of differential thermal analysis and scanning electron microscopy. The optimum heat-treatment regime was obtained by orthogonal experimental results for glass-ceramics in which blast furnace slag comprised 70% of the composition and 1% Cr2O3 and 4% TiO2 were used as nucleating agents. The nucleation temperature was 750°C for 2.5 h and the crystallization temperature was 930°C for 1 h. Under this regime, the performance of the glass-ceramic was better than that of other groups in the orthogonal experiment.

Preliminary Study on Design of Biological Shielding Concrete - Selection of Binder

2016 ◽  
Vol 722 ◽  
pp. 173-177
Author(s):  
Jaroslava Koťátková ◽  
Pavel Reiterman
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Nuclear Power ◽  
Blended Cement ◽  
Nuclear Radiation ◽  
Slag Cement ◽  
Volume Changes ◽  
Preliminary Study ◽  
Furnace Slag ◽  
Selection Of

The preliminary study is targeted at the design of different mixtures of biological shielding concrete for later investigation of the effects of nuclear radiation and heat on its durability. The article deals with the investigation of the properties of cement pastes prepared from two different cement types and the selection of the proper binder for biological shielding concrete. Portland cement CEM I 42.5 R was selected as the representative binder of commonly used binder for shielding concrete (e. g. in the Czech nuclear power plant Temelín) and Portland blast furnace slag cement CEM II/B-S 32.5 was chosen for its anticipated better performance. Mechanical properties and volume changes in time were studied on two sets of samples – stored in laboratory conditions, resp. in water. Results revealed higher flexural strength for pastes made from CEM II/B-S 32.5 for both storage conditions and also slightly higher compressive strength. Higher differences between the values of single samples measured in time referred to a postponed hydration process of the blended cement, which is important for slower heat evolution and lower shrinkage. The measurement of volume changes proved the expected better performance of CEM II/B-S 32.5 in terms of shrinkage. From the obtained results, the Portland blast furnace slag cement CEM II/B-S 32.5 was evaluated as the better alternative for biological shielding concrete binder.

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