Flexural properties after exposure to elevated temperatures of a ground granulated blast furnace slag concrete incorporating steel fibers and polypropylene fibers

2013 ◽  
Vol 38 (5) ◽  
pp. 576-587 ◽  
Author(s):  
Danying Gao ◽  
Dongming Yan ◽  
Xiangyu Li
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Elevated Temperatures ◽  
Steel Fibers ◽  
Flexural Properties ◽  
Polypropylene Fibers ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Physico chemical and thermal resistance properties of fly ash/ground granulated blast furnace slag based geopolymer mortar

2021 ◽  
Vol 25 (8) ◽  
pp. 110-120
Author(s):  
M. Sivasakthi ◽  
R. Jeyalakshmi ◽  
N.P. Rajamane ◽  
J. Baskarasundararaj
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Elevated Temperatures ◽  
Linear Thermal Expansion ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

The present study investigated the physicochemical and thermal properties of fly ash and ground granulated blast furnace slag (GGBS) based geopolymer mortars exposed to elevated temperatures under different reaction conditions. The compressive strength results shows that fly ash based geopolymer mortar exhibits retention of compressive strength up to 800⁰C whereas the addition of GGBS increases the ambient temperature compressive strength, however, thereafter the retention of strength is observed as 66% at 400˚C and 30% at 800˚C. Fourier transform infra-red spectroscopy (FT- IR) and 29Si and 27Al Magic angle spinning nuclear magnetic resonance (MAS-NMR) spectrum confirmed the alumino-silicate network structure of the geopolymer. Thermogravimetry with differential thermal analysis (TGA/DTA) showed that most of the % weight loss occurred in the temperature range between 30-250ºC due to the water loss after that it was stabilized till 1000⁰C. Thermal conductivity has the direct relationship with the temperature whereas it is vice versa for the % linear thermal expansion. The Scanning electron microscopy (SEM) analysis was performed to identify the morphology changes before and after thermal exposure.

Influence of elevated temperature on alkali-activated ground granulated blast furnace slag concrete

2019 ◽  
Vol 11 (2) ◽  
pp. 247-260
Author(s):  
Virendra Kumar ◽  
Amit Kumar ◽  
Brajkishor Prasad
Keyword(s):  
Blast Furnace ◽  
Elevated Temperature ◽  
Blast Furnace Slag ◽  
Elevated Temperatures ◽  
Experimental Result ◽  
Content Type ◽  
Granulated Blast Furnace Slag ◽  
New Type ◽  
Furnace Slag ◽  
Alkali Activated

Purpose This paper aims to present an experimental investigation on the performances of alkali-activated slag (AAS) concrete and Portland slag cement (PSC) concrete under the influence of elevated temperature. In the present study, the alkali-activated binder contains 85% of ground granulated blast furnace slag (GGBFS) and 15% of powder blended as chemical activators. Design/methodology/approach For the purpose, standard size of cube, cylinder and prism have been cast for a designed mix of concrete. The AAS concrete specimens were kept for water as well as air curing. After attaining the maturity of 28 days, the samples were first exposed to different elevated temperatures, i.e. 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, 700°C and 800°C. Later on, the tests were conducted on these samples to find the change in weight and the residual strength of the concrete. Findings After 500°C exposure, a considerable amount of the strength loss has been observed for AAS concrete. It has been evaluated that the performance of AAS concrete is better than that of the PSC concrete at elevated temperature. Research limitations/implications The present research work is being applied on the material for which the experimental result has been obtained. Practical implications The author has tried to develop a new type of binder by using steel industry waste material and then tested at elevated temperature to sustain at high temperatures. Social implications This research may give a social impact for developing mass housing project with a lower cost than that of using a conventional binder, i.e. cement. Originality/value A new type of binder material is being developed.

ON THE USE OF SLAG CEMENT COMPOSITIONS IN THE CONSTRUCTION OF WELLS

2017 ◽  
pp. 80-85
Author(s):  
V. P. Ovchinnikov ◽  
O. V. Rozhkova ◽  
N. A. Aksenova ◽  
P. V. Ovchinnikov
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Elevated Temperatures ◽  
Cement Mortar ◽  
Setting Time ◽  
Rheological Parameters ◽  
Slag Cement ◽  
Furnace Slag

In the article studies of oil-filled compositions with the addition of blast-furnace slag for strength at elevated temperatures are presented. The rheological parameters of the slag cement slag cement mortar, as well as the setting time, were studied. Conclusions are drawn about the prospects of further study of slag cementcontaining compositions.

The Influence of the Properties of the Material Used for Obtaining Geopolymers on Their Structure and Compressive Strength

2017 ◽  
Vol 68 (6) ◽  
pp. 1182-1187
Author(s):  
Ilenuta Severin ◽  
Maria Vlad
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Wheat Straw ◽  
Red Mud ◽  
Blast Furnace Slag ◽  
Complex Structure ◽  
Point Of View ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag ◽  
Straw Ash

This article presents the influence of the properties of the materials in the geopolymeric mixture, ground granulated blast furnace slag (GGBFS) + wheat straw ash (WSA) + uncalcined red mud (RMu), and ground granulated blast furnace slag + wheat straw ash + calcined red mud (RMc), over the microstructure and mechanical properties of the synthesised geopolymers. The activation solutions used were a NaOH solution with 8M concentration, and a solution realised from 50%wt NaOH and 50%wt Na2SiO3. The samples were analysed: from the microstructural point of view through SEM microscopy; the chemical composition was determined through EDX analysis; and the compressive strength tests was done for samples tested at 7 and 28 days, respectively. The SEM micrographies of the geopolymers have highlighted a complex structure and an variable compressive strength. Compressive strength varied from 24 MPa in the case of the same recipe obtained from 70% of GGBFS + 25% WSA +5% RMu, alkaline activated with NaOH 8M (7 days testing) to 85 MPa in the case of the recipe but replacing RMu with RMc with calcined red mud, alkaline activated with the 50%wt NaOH and 50%wt Na2SiO3 solution (28 days testing). This variation in the sense of the rise in compressive strength can be attributed to the difference in reactivity of the materials used in the recipes, the curing period, the geopolymers structure, and the presence of a lower or higher rate of pores, as well as the alkalinity and the nature of the activation solutions used.

scholarly journals Effect of Flue Gas Desulfurization Gypsum on the Properties of Calcium Sulfoaluminate Cement Blended with Ground Granulated Blast Furnace Slag

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 382 ◽  
Author(s):  
Danying Gao ◽  
Zhenqing Zhang ◽  
Yang Meng ◽  
Jiyu Tang ◽  
Lin Yang
Keyword(s):  
Blast Furnace ◽  
Mechanical Strength ◽  
Flue Gas ◽  
Blast Furnace Slag ◽  
Setting Time ◽  
Flue Gas Desulfurization ◽  
Calcium Sulfoaluminate Cement ◽  
Calcium Sulfoaluminate ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

This work aims to investigate the effect of additional flue gas desulfurization gypsum (FGDG) on the properties of calcium sulfoaluminate cement (CSAC) blended with ground granulated blast furnace slag (GGBFS). The hydration rate, setting time, mechanical strength, pore structure and hydration products of the CSAC-GGBFS mixture containing FGDG were investigated systematically. The results show that the addition of FGDG promotes the hydration of the CSAC-GGBFS mixture and improves its mechanical strength; however, the FGDG content should not exceed 6%.

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