scholarly journals Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zhonghui Zhang ◽  
Yuanhui Li ◽  
Lei Ren ◽  
Zhenbang Guo ◽  
Haiqiang Jiang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Solid Content ◽  
Binder Content ◽  
Rheological Parameters ◽  
Chemical Admixture ◽  
Shear Yield ◽  
Paste Backfill ◽  
Furnace Slag

The use of blast furnace slag-based binders in cemented paste backfill (CPB) has become increasingly popular in China, due to its low cost and superior early-age strength. Increasing the solid content can increase the strength of CPB, but it will lead to a decrease in its fluidity. As a chemical admixture that can improve CPB slurry fluidity, superplasticizer is gaining increased interest in the field of CPB. In this study, the effects of superplasticizer types and dosages, curing time, solid content, and binder content on the rheological properties of fresh CPB made of blast furnace slag-based binder (Slag-CPB) were studied. For Slag-CPB samples, polycarboxylate (PC) has the best water-reducing effect, followed by polymelamine sulfonate (PMS) and polynaphthalene sulfonate (PNS). In the absence of a superplasticizer, the shear yield stress and plastic viscosity of Slag-CPB are lower than those of CPB made of ordinary Portland cement (OPC-CPB). The water-reducing effect of PC on OPC-CPBs samples is stronger than that of Slag-CPB samples. The degradation rate of the water-reducing effect in slag-based samples is higher than that in cement-based samples. The effect of PC is affected by solid content and binder content. These results will contribute to a better understanding of the rheological behavior of Slag-CPB with superplasticizer.

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.

Influence of Aggregate and Binder Content on the Properties of Pervious Concrete

2020 ◽  
Vol 838 ◽  
pp. 3-9
Author(s):  
Marek Kováč ◽  
Alena Sicakova
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Hydraulic Conductivity ◽  
Blast Furnace Slag ◽  
Binder Content ◽  
Pervious Concrete ◽  
Void Content ◽  
Aggregate Gradation ◽  
Hydraulic Activity ◽  
Furnace Slag

This study introduces the experiment based on following parameters: kind of aggregate (natural river gravel and air-cooled blast furnace slag), the aggregate gradation and content of binder. Main properties such as compressive strength, void content and hydraulic conductivity of pervious concrete were investigated in the experiment. The experiment showed satisfactory results in the case of pervious concrete made of natural aggregate. Results of pervious concrete made of air-cooled blast furnace slag aggregates are perspective, however needs for some optimizations. Results confirmed the opposite relationship between compressive strength and void content/hydraulic activity. ACBFS performs worse than NA as for compressive strength, while it performs better in the case of hydraulic conductivity and void content.

scholarly journals Metal reduction from landfill leachate by using blast furnace slag and pine bark - discussion about the parameters significant for metal removal

2019 ◽  
pp. 277-286
Author(s):  
Emma Nehrenheim
Keyword(s):  
Blast Furnace ◽  
Landfill Leachate ◽  
Blast Furnace Slag ◽  
Metal Removal ◽  
Low Cost ◽  
Paper Industry ◽  
Filter Material ◽  
Pine Bark ◽  
Cost Treatment ◽  
Furnace Slag

In Sweden there are many old landfills of which the content is more or less unknown, Theleachates from these are of varying quality, mirroring the waste deposited in the landfills,Metals commonly occurring in leachates are i,e, zink (Zn), lead (Pb), cupper (Cu) and nickel(Ni), Ni is of particular interest due to the un-predictable mobility of the metal, For small,weak leachates a passive low-cost treatment system can be suitable, Reactive filter technologyis one alternative and by using by-products from national and global industries theenvironmental benefit could be further increased, Pine bark (from pulp and paper industry)and blast furnace slag (from steel manufacturing) are examples of such materials, Designingfilters for removal of metals from leachate includes taking a series of parameters into accountAt the landfill site in Eskilstuna, Sweden, a facility was designed as a pilot study, Fourcolumns were filled with filter material, The materials were sand, amorphous and crystallineblast furnace slag and pine bark, The aim was to investigate parameters significant for metaluptake from landfill leachate, A screening of the metals, physio-chemical parameters andsome organic pollutants was conducted for a period of five months, A part from this, a batchexperiment was conducted, Contact time, initial concentration, other leachate components andpH are examples of parameters that have a significant influence on the metal removingcapacity of a filter,

Preparation of a New Unburned Brick from Ti-Bearing Blast Furnace Slag and PVA Modified by Epikote

2013 ◽  
Vol 785-786 ◽  
pp. 328-331 ◽  
Author(s):  
Xiang Wen Kong ◽  
Li Li Ren ◽  
Xia Ai ◽  
Jing Zhang
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Mixing Time ◽  
Cementitious Materials ◽  
Test Method ◽  
Process Conditions ◽  
Curing Time ◽  
Orthogonal Test Method ◽  
Furnace Slag

A new unburned brick was prepared from the Ti-bearing blast furnace slag as an aggregate and PVA modified by epikote as cementitious materials. The effects of modified PVA and auxiliaries on compressive strength of unburned brick were studied by the orthogonal test method. The results show that samples have better properties and low cost when the samples have a composition of slag dosage 72 %, modified PVA dosage 6%, auxiliary 1 dosage 6%, auxiliary 2 dosage 10%, water 6% and the process conditions of preparing the brick sample were mixing time 1 h, forming time 10 min, forming pressure 40 MPa, and curing time 7 d. The study reveals that the samples properties can meet the standard requirements of excellent grade products (MU20) in GB11945-1999.

Paste backfill of high-sulphide mill tailings using alkali-activated blast furnace slag: Effect of activator nature, concentration and slag properties

2015 ◽  
Vol 83 ◽  
pp. 117-127 ◽  
Author(s):  
Ferdi Cihangir ◽  
Bayram Ercikdi ◽  
Ayhan Kesimal ◽  
Haci Deveci ◽  
Fatih Erdemir
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Mill Tailings ◽  
Slag Properties ◽  
Paste Backfill ◽  
Furnace Slag ◽  
Alkali Activated

Preparation of low cost glass–ceramics from molten blast furnace slag

2012 ◽  
Vol 38 (3) ◽  
pp. 2495-2500 ◽  
Author(s):  
Yan Zhao ◽  
Dengfu Chen ◽  
Yanyan Bi ◽  
Mujun Long
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Low Cost ◽  
Glass Ceramics ◽  
Furnace Slag

scholarly journals Application of a blast furnace slag carrier catalyst in flue gas denitration and sulfur resistance

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15036-15043
Author(s):  
Zhang Lei ◽  
Lu Xi ◽  
Qi Lingbo ◽  
Shu Hao ◽  
Jia Yang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Flue Gas ◽  
Blast Furnace Slag ◽  
High Efficiency ◽  
Low Cost ◽  
Sulfur Resistance ◽  
Furnace Slag

It is an urgent need to develop a new catalyst with high efficiency and low cost.

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